chore: bump version to 3.3.32

Co-authored-by: Codex <noreply@openai.com>

.github/actions/verify-container/action.yml

@@ -0,0 +1,242 @@
+name: Verify container
+description: Scan and validate a built image with the deployment Compose configuration
+inputs:
+  image:
+    description: Local image tag or immutable registry digest to validate
+    required: true
+  platform:
+    description: Native runner image platform
+    required: true
+  artifact-name:
+    description: Unique diagnostics artifact name within the workflow run
+    required: true
+runs:
+  using: composite
+  steps:
+    - name: Define isolated runtime values
+      shell: bash
+      env:
+        IMAGE: ${{ inputs.image }}
+      run: |
+        set -euo pipefail
+        admin_password="$(openssl rand -hex 24)"
+        postgres_password="$(openssl rand -hex 24)"
+        redis_password="$(openssl rand -hex 24)"
+        echo "::add-mask::$admin_password"
+        echo "::add-mask::$postgres_password"
+        echo "::add-mask::$redis_password"
+        {
+          echo "CPR_IMAGE=$IMAGE"
+          echo "COMPOSE_PROJECT_NAME=cpr-check-${GITHUB_RUN_ID}-${GITHUB_RUN_ATTEMPT}-${RUNNER_ARCH,,}"
+          echo "DIAGNOSTICS_DIR=$RUNNER_TEMP/codex-proxy-rs-diagnostics"
+          echo "CI_ADMIN_PASSWORD=$admin_password"
+          echo "CI_POSTGRES_PASSWORD=$postgres_password"
+          echo "CI_REDIS_PASSWORD=$redis_password"
+        } >> "$GITHUB_ENV"
+
+    - name: Scan container image
+      uses: aquasecurity/trivy-action@ed142fd0673e97e23eac54620cfb913e5ce36c25 # v0.36.0
+      env:
+        TRIVY_PLATFORM: ${{ inputs.platform }}
+        TRIVY_QUIET: 'true'
+        TRIVY_SKIP_VERSION_CHECK: 'true'
+      with:
+        image-ref: ${{ inputs.image }}
+        version: v0.72.0
+        format: json
+        output: trivy-results.json
+        severity: HIGH,CRITICAL
+        vuln-type: os,library
+        scanners: vuln
+        ignore-unfixed: true
+        exit-code: '0'
+
+    - name: Generate Trivy SARIF
+      shell: bash
+      run: trivy convert --format sarif --output trivy-results.sarif trivy-results.json
+
+    - name: Upload Trivy SARIF
+      if: >-
+        ${{ always() && hashFiles('trivy-results.sarif') != '' &&
+            (github.event_name != 'pull_request' ||
+             github.event.pull_request.head.repo.full_name == github.repository) }}
+      uses: github/codeql-action/upload-sarif@cdf488f595d80d6e07e03d4674febd5ab45fa938 # v4.37.9
+      with:
+        sarif_file: trivy-results.sarif
+        category: runtime-container-${{ inputs.platform }}
+
+    - name: Enforce Trivy vulnerability gate
+      shell: bash
+      run: trivy convert --format table --severity HIGH,CRITICAL --exit-code 1 trivy-results.json
+
+    - name: Prepare isolated runtime
+      shell: bash
+      run: |
+        set -euo pipefail
+        umask 0077
+        # Bind roots hand off ownership to the image-specific database users.
+        # Sticky directories keep that initialization compatible with user-namespaced runners.
+        install -d -m 1777 .runtime/postgres .runtime/redis
+        mkdir -p "$DIAGNOSTICS_DIR"
+        sudo install -d -m 0770 -o "$(id -u)" -g 10001 \
+          .runtime/data .runtime/logs
+        ruby <<'RUBY'
+        path = "deploy/config.example.yaml"
+        content = File.read(path)
+        replacements = {
+          "password: &postgres_password ''" => "password: &postgres_password '#{ENV.fetch("CI_POSTGRES_PASSWORD")}'",
+          "password: &redis_password ''" => "password: &redis_password '#{ENV.fetch("CI_REDIS_PASSWORD")}'",
+          "default_password: ''" => "default_password: '#{ENV.fetch("CI_ADMIN_PASSWORD")}'",
+        }
+        replacements.each do |placeholder, configured|
+          raise "missing config placeholder: #{placeholder}" unless content.sub!(placeholder, configured)
+        end
+        File.write("deploy/config.yaml", content)
+        RUBY
+        sudo chown "$(id -u):10001" deploy/config.yaml
+        chmod 0640 deploy/config.yaml
+
+    - name: Validate Docker Compose
+      shell: bash
+      run: |
+        set -euo pipefail
+        docker compose --project-name "$COMPOSE_PROJECT_NAME" \
+          -f deploy/compose.yaml config --quiet
+
+    - name: Configure Redis host memory overcommit
+      shell: bash
+      run: |
+        set -euo pipefail
+        sudo sysctl -w vm.overcommit_memory=1
+        test "$(sysctl -n vm.overcommit_memory)" = 1
+
+    - name: Verify PostgreSQL and Redis volume persistence
+      shell: bash
+      run: |
+        set -euo pipefail
+        compose=(docker compose --project-name "$COMPOSE_PROJECT_NAME" \
+          -f deploy/compose.yaml)
+        "${compose[@]}" up -d --no-build --wait postgres redis
+        test "$("${compose[@]}" exec -T -e PGPASSWORD="$CI_POSTGRES_PASSWORD" postgres \
+          psql -At -U codex_proxy -d codex_proxy -c "SHOW TimeZone;" | tr -d '\r')" = Asia/Shanghai
+        "${compose[@]}" exec -T -e PGPASSWORD="$CI_POSTGRES_PASSWORD" postgres \
+          psql -v ON_ERROR_STOP=1 -U codex_proxy -d codex_proxy -c \
+          "CREATE TABLE cpr_ci_persistence_probe (value text PRIMARY KEY); INSERT INTO cpr_ci_persistence_probe VALUES ('persisted');"
+        "${compose[@]}" exec -T -e REDISCLI_AUTH="$CI_REDIS_PASSWORD" redis \
+          redis-cli SET cpr:ci:persistence-probe persisted
+        "${compose[@]}" up -d --no-build --wait --force-recreate postgres redis
+        test "$("${compose[@]}" exec -T -e PGPASSWORD="$CI_POSTGRES_PASSWORD" postgres \
+          psql -At -U codex_proxy -d codex_proxy -c \
+          "SELECT value FROM cpr_ci_persistence_probe;")" = persisted
+        test "$("${compose[@]}" exec -T -e REDISCLI_AUTH="$CI_REDIS_PASSWORD" redis \
+          redis-cli --raw GET cpr:ci:persistence-probe | tr -d '\r')" = persisted
+        "${compose[@]}" exec -T -e PGPASSWORD="$CI_POSTGRES_PASSWORD" postgres \
+          psql -v ON_ERROR_STOP=1 -U codex_proxy -d codex_proxy -c \
+          "DROP TABLE cpr_ci_persistence_probe;"
+        "${compose[@]}" exec -T -e REDISCLI_AUTH="$CI_REDIS_PASSWORD" redis \
+          redis-cli DEL cpr:ci:persistence-probe
+
+    - name: Start and verify application
+      shell: bash
+      run: |
+        set -euo pipefail
+        compose=(docker compose --project-name "$COMPOSE_PROJECT_NAME" \
+          -f deploy/compose.yaml)
+        "${compose[@]}" up -d --no-build --wait codex-proxy-rs
+        status="$(curl --silent --show-error --output /dev/null --write-out '%{http_code}' \
+          "http://127.0.0.1:8080/healthz")"
+        test "$status" = 204
+        test "$("${compose[@]}" exec -T codex-proxy-rs id -u | tr -d '\r')" = 10001
+        test "$("${compose[@]}" exec -T codex-proxy-rs id -g | tr -d '\r')" = 10001
+        test "$("${compose[@]}" exec -T codex-proxy-rs date +%z | tr -d '\r')" = +0800
+        test "$("${compose[@]}" exec -T codex-proxy-rs cat /etc/timezone | tr -d '\r')" = Asia/Shanghai
+        "${compose[@]}" exec -T codex-proxy-rs sh -c \
+          'touch /app/.runtime/data/.ci-write /app/.runtime/logs/.ci-write && rm /app/.runtime/data/.ci-write /app/.runtime/logs/.ci-write'
+
+    - name: Verify clean logs and graceful shutdown
+      shell: bash
+      run: |
+        set -euo pipefail
+        compose=(docker compose --project-name "$COMPOSE_PROJECT_NAME" \
+          -f deploy/compose.yaml)
+        "${compose[@]}" stop --timeout 30 codex-proxy-rs
+        container_id="$("${compose[@]}" ps -a -q codex-proxy-rs)"
+        test -n "$container_id"
+        test "$(docker inspect --format '{{.State.ExitCode}}' "$container_id")" = 0
+        "${compose[@]}" logs --no-color --timestamps codex-proxy-rs \
+          > "$DIAGNOSTICS_DIR/application.log"
+        "${compose[@]}" logs --no-color --timestamps postgres \
+          > "$DIAGNOSTICS_DIR/postgres.log"
+        "${compose[@]}" logs --no-color --timestamps redis \
+          > "$DIAGNOSTICS_DIR/redis.log"
+        if grep --extended-regexp --ignore-case \
+          '"level"[[:space:]]*:[[:space:]]*"(warn|error|fatal|panic)"|(^|[^[:alnum:]_])panic([^[:alnum:]_]|$)' \
+          "$DIAGNOSTICS_DIR/application.log" \
+          || grep --extended-regexp --ignore-case \
+            '(^|[[:space:]])(warning|error|fatal|panic):' \
+            "$DIAGNOSTICS_DIR/postgres.log" \
+          || grep --extended-regexp --ignore-case \
+            '[0-9]+:[A-Z][[:space:]].*[[:space:]]#[[:space:]]|(^|[|[:space:]])(warning|error|fatal|panic)(:|[[:space:]])' \
+            "$DIAGNOSTICS_DIR/redis.log"; then
+          echo "container logs contain a warning or error severity" >&2
+          exit 1
+        fi
+
+    - name: Collect container diagnostics
+      if: always()
+      shell: bash
+      run: |
+        set +e
+        mkdir -p "$DIAGNOSTICS_DIR"
+        raw_dir="$(mktemp -d)"
+        compose=(docker compose --project-name "$COMPOSE_PROJECT_NAME" \
+          -f deploy/compose.yaml)
+        "${compose[@]}" config > "$raw_dir/compose-config.yaml" 2>&1
+        "${compose[@]}" ps -a > "$raw_dir/compose-ps.txt" 2>&1
+        "${compose[@]}" logs --no-color --timestamps > "$raw_dir/compose.log" 2>&1
+        mapfile -t container_ids < <("${compose[@]}" ps -a -q)
+        if [ "${#container_ids[@]}" -gt 0 ]; then
+          docker inspect "${container_ids[@]}" > "$raw_dir/docker-inspect.json" 2>&1
+        fi
+        RAW_DIR="$raw_dir" OUTPUT_DIR="$DIAGNOSTICS_DIR" ruby <<'RUBY'
+        raw_dir = ENV.fetch("RAW_DIR")
+        output_dir = ENV.fetch("OUTPUT_DIR")
+        secrets = [
+          ENV.fetch("CI_ADMIN_PASSWORD"),
+          ENV.fetch("CI_POSTGRES_PASSWORD"),
+          ENV.fetch("CI_REDIS_PASSWORD"),
+        ]
+        encoded_secrets = secrets.map do |secret|
+          secret.encode("UTF-8").bytes.map do |byte|
+            character = byte.chr
+            character.match?(/[A-Za-z0-9]/) ? character : format("%%%02X", byte)
+          end.join
+        end
+
+        Dir.children(raw_dir).each do |name|
+          content = File.binread(File.join(raw_dir, name))
+          (secrets + encoded_secrets).each do |secret|
+            content = content.gsub(secret, "<redacted>")
+          end
+          File.binwrite(File.join(output_dir, name), content)
+        end
+        RUBY
+        rm -rf "$raw_dir"
+        cp trivy-results.json trivy-results.sarif "$DIAGNOSTICS_DIR/" 2>/dev/null || true
+
+    - name: Upload container diagnostics
+      if: always()
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+      with:
+        name: ${{ inputs.artifact-name }}
+        path: ${{ runner.temp }}/codex-proxy-rs-diagnostics
+        if-no-files-found: warn
+        retention-days: 7
+
+    - name: Remove isolated runtime
+      if: always()
+      shell: bash
+      run: |
+        docker compose --project-name "$COMPOSE_PROJECT_NAME" \
+          -f deploy/compose.yaml down --remove-orphans || true
+        sudo rm -rf "$GITHUB_WORKSPACE/.runtime" "$GITHUB_WORKSPACE/deploy/config.yaml"

.github/workflows/_container.yml

@@ -17,36 +17,44 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 45
     env:
-      COMPOSE_PROJECT_NAME: cpr-ci-${{ github.run_id }}-${{ github.run_attempt }}
       CPR_IMAGE: codex-proxy-rs:ci-${{ inputs.ref }}
       TRIVY_QUIET: 'true'
       TRIVY_SKIP_VERSION_CHECK: 'true'
     steps:
-      - name: Define isolated runtime values
-        shell: bash
-        run: |
-          set -euo pipefail
-          admin_password="$(openssl rand -hex 24)"
-          postgres_password="$(openssl rand -hex 24)"
-          redis_password="$(openssl rand -hex 24)"
-          echo "::add-mask::$admin_password"
-          echo "::add-mask::$postgres_password"
-          echo "::add-mask::$redis_password"
-          {
-            echo "DIAGNOSTICS_DIR=$RUNNER_TEMP/codex-proxy-rs-diagnostics"
-            echo "CI_ADMIN_PASSWORD=$admin_password"
-            echo "CI_POSTGRES_PASSWORD=$postgres_password"
-            echo "CI_REDIS_PASSWORD=$redis_password"
-          } >> "$GITHUB_ENV"
-
       - name: Checkout
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           ref: ${{ inputs.ref }}
 
       - name: Setup Docker Buildx
+        id: buildx
         uses: docker/setup-buildx-action@37fe631027851001ddb9b187196cc803df7f5f0e # v4.3.0
 
+      - name: Cache Cargo mounts
+        id: cargo-cache
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
+        with:
+          path: ${{ runner.temp }}/container-cargo
+          key: container-cargo-v1-${{ runner.os }}-${{ runner.arch }}-${{ hashFiles('backend/Cargo.lock', 'backend/**/Cargo.toml', 'deploy/Dockerfile') }}-${{ inputs.ref }}
+          restore-keys: |
+            container-cargo-v1-${{ runner.os }}-${{ runner.arch }}-${{ hashFiles('backend/Cargo.lock', 'backend/**/Cargo.toml', 'deploy/Dockerfile') }}-
+            container-cargo-v1-${{ runner.os }}-${{ runner.arch }}-
+
+      # The GHA layer exporter does not persist RUN --mount=type=cache contents.
+      # Extraction runs before actions/cache saves its directories in post steps.
+      - name: Restore Cargo mounts to BuildKit
+        uses: reproducible-containers/buildkit-cache-dance@5422eac04292c961a382e0f584ea0f03ad9da723 # v3.4.0
+        with:
+          builder: ${{ steps.buildx.outputs.name }}
+          scratch-dir: ${{ runner.temp }}/container-cache-dance
+          cache-map: |
+            {
+              "${{ runner.temp }}/container-cargo/registry": "/usr/local/cargo/registry",
+              "${{ runner.temp }}/container-cargo/git": "/usr/local/cargo/git",
+              "${{ runner.temp }}/container-cargo/target": "/app/backend/target"
+            }
+          skip-extraction: ${{ steps.cargo-cache.outputs.cache-hit }}
+
       - name: Build runtime image
         uses: docker/build-push-action@53b7df96c91f9c12dcc8a07bcb9ccacbed38856a # v7.3.0
         with:
@@ -61,209 +69,9 @@ jobs:
           cache-from: type=gha,scope=runtime-ci
           cache-to: type=gha,mode=max,scope=runtime-ci
 
-      - name: Generate Trivy SARIF
-        uses: aquasecurity/trivy-action@ed142fd0673e97e23eac54620cfb913e5ce36c25 # v0.36.0
+      - name: Verify runtime image
+        uses: ./.github/actions/verify-container
         with:
-          image-ref: ${{ env.CPR_IMAGE }}
-          version: v0.72.0
-          format: sarif
-          output: trivy-results.sarif
-          severity: HIGH,CRITICAL
-          vuln-type: os,library
-          scanners: vuln
-          ignore-unfixed: true
-          exit-code: '0'
-
-      - name: Upload Trivy SARIF
-        if: >-
-          ${{ hashFiles('trivy-results.sarif') != '' &&
-              (github.event_name != 'pull_request' ||
-               github.event.pull_request.head.repo.full_name == github.repository) }}
-        uses: github/codeql-action/upload-sarif@cdf488f595d80d6e07e03d4674febd5ab45fa938 # v4.37.9
-        with:
-          sarif_file: trivy-results.sarif
-          category: runtime-container
-
-      - name: Enforce Trivy vulnerability gate
-        uses: aquasecurity/trivy-action@ed142fd0673e97e23eac54620cfb913e5ce36c25 # v0.36.0
-        with:
-          image-ref: ${{ env.CPR_IMAGE }}
-          version: v0.72.0
-          format: table
-          severity: HIGH,CRITICAL
-          vuln-type: os,library
-          scanners: vuln
-          ignore-unfixed: true
-          exit-code: '1'
-
-      - name: Prepare isolated runtime
-        shell: bash
-        run: |
-          set -euo pipefail
-          umask 0077
-          # Bind roots hand off ownership to the image-specific database users.
-          # Sticky directories keep that initialization compatible with user-namespaced runners.
-          install -d -m 1777 .runtime/postgres .runtime/redis
-          mkdir -p "$DIAGNOSTICS_DIR"
-          sudo install -d -m 0770 -o "$(id -u)" -g 10001 \
-            .runtime/data .runtime/logs
-          ruby <<'RUBY'
-          path = "deploy/config.example.yaml"
-          content = File.read(path)
-          replacements = {
-            "password: &postgres_password ''" => "password: &postgres_password '#{ENV.fetch("CI_POSTGRES_PASSWORD")}'",
-            "password: &redis_password ''" => "password: &redis_password '#{ENV.fetch("CI_REDIS_PASSWORD")}'",
-            "default_password: ''" => "default_password: '#{ENV.fetch("CI_ADMIN_PASSWORD")}'",
-          }
-          replacements.each do |placeholder, configured|
-            raise "missing config placeholder: #{placeholder}" unless content.sub!(placeholder, configured)
-          end
-          File.write("deploy/config.yaml", content)
-          RUBY
-          sudo chown "$(id -u):10001" deploy/config.yaml
-          chmod 0640 deploy/config.yaml
-
-      - name: Validate Docker Compose
-        shell: bash
-        run: |
-          set -euo pipefail
-          docker compose --project-name "$COMPOSE_PROJECT_NAME" \
-            -f deploy/compose.yaml config --quiet
-
-      - name: Configure Redis host memory overcommit
-        shell: bash
-        run: |
-          set -euo pipefail
-          sudo sysctl -w vm.overcommit_memory=1
-          test "$(sysctl -n vm.overcommit_memory)" = 1
-
-      - name: Verify PostgreSQL and Redis volume persistence
-        shell: bash
-        run: |
-          set -euo pipefail
-          compose=(docker compose --project-name "$COMPOSE_PROJECT_NAME" \
-            -f deploy/compose.yaml)
-          "${compose[@]}" up -d --no-build --wait postgres redis
-          test "$("${compose[@]}" exec -T -e PGPASSWORD="$CI_POSTGRES_PASSWORD" postgres \
-            psql -At -U codex_proxy -d codex_proxy -c "SHOW TimeZone;" | tr -d '\r')" = Asia/Shanghai
-          "${compose[@]}" exec -T -e PGPASSWORD="$CI_POSTGRES_PASSWORD" postgres \
-            psql -v ON_ERROR_STOP=1 -U codex_proxy -d codex_proxy -c \
-            "CREATE TABLE cpr_ci_persistence_probe (value text PRIMARY KEY); INSERT INTO cpr_ci_persistence_probe VALUES ('persisted');"
-          "${compose[@]}" exec -T -e REDISCLI_AUTH="$CI_REDIS_PASSWORD" redis \
-            redis-cli SET cpr:ci:persistence-probe persisted
-          "${compose[@]}" up -d --no-build --wait --force-recreate postgres redis
-          test "$("${compose[@]}" exec -T -e PGPASSWORD="$CI_POSTGRES_PASSWORD" postgres \
-            psql -At -U codex_proxy -d codex_proxy -c \
-            "SELECT value FROM cpr_ci_persistence_probe;")" = persisted
-          test "$("${compose[@]}" exec -T -e REDISCLI_AUTH="$CI_REDIS_PASSWORD" redis \
-            redis-cli --raw GET cpr:ci:persistence-probe | tr -d '\r')" = persisted
-          "${compose[@]}" exec -T -e PGPASSWORD="$CI_POSTGRES_PASSWORD" postgres \
-            psql -v ON_ERROR_STOP=1 -U codex_proxy -d codex_proxy -c \
-            "DROP TABLE cpr_ci_persistence_probe;"
-          "${compose[@]}" exec -T -e REDISCLI_AUTH="$CI_REDIS_PASSWORD" redis \
-            redis-cli DEL cpr:ci:persistence-probe
-
-      - name: Start and verify application
-        shell: bash
-        run: |
-          set -euo pipefail
-          compose=(docker compose --project-name "$COMPOSE_PROJECT_NAME" \
-            -f deploy/compose.yaml)
-          "${compose[@]}" up -d --no-build --wait codex-proxy-rs
-          status="$(curl --silent --show-error --output /dev/null --write-out '%{http_code}' \
-            "http://127.0.0.1:8080/healthz")"
-          test "$status" = 204
-          test "$("${compose[@]}" exec -T codex-proxy-rs id -u | tr -d '\r')" = 10001
-          test "$("${compose[@]}" exec -T codex-proxy-rs id -g | tr -d '\r')" = 10001
-          test "$("${compose[@]}" exec -T codex-proxy-rs date +%z | tr -d '\r')" = +0800
-          test "$("${compose[@]}" exec -T codex-proxy-rs cat /etc/timezone | tr -d '\r')" = Asia/Shanghai
-          "${compose[@]}" exec -T codex-proxy-rs sh -c \
-            'touch /app/.runtime/data/.ci-write /app/.runtime/logs/.ci-write && rm /app/.runtime/data/.ci-write /app/.runtime/logs/.ci-write'
-
-      - name: Verify clean logs and graceful shutdown
-        shell: bash
-        run: |
-          set -euo pipefail
-          compose=(docker compose --project-name "$COMPOSE_PROJECT_NAME" \
-            -f deploy/compose.yaml)
-          "${compose[@]}" stop --timeout 30 codex-proxy-rs
-          container_id="$("${compose[@]}" ps -a -q codex-proxy-rs)"
-          test -n "$container_id"
-          test "$(docker inspect --format '{{.State.ExitCode}}' "$container_id")" = 0
-          "${compose[@]}" logs --no-color --timestamps codex-proxy-rs \
-            > "$DIAGNOSTICS_DIR/application.log"
-          "${compose[@]}" logs --no-color --timestamps postgres \
-            > "$DIAGNOSTICS_DIR/postgres.log"
-          "${compose[@]}" logs --no-color --timestamps redis \
-            > "$DIAGNOSTICS_DIR/redis.log"
-          if grep --extended-regexp --ignore-case \
-            '"level"[[:space:]]*:[[:space:]]*"(warn|error|fatal|panic)"|(^|[^[:alnum:]_])panic([^[:alnum:]_]|$)' \
-            "$DIAGNOSTICS_DIR/application.log" \
-            || grep --extended-regexp --ignore-case \
-              '(^|[[:space:]])(warning|error|fatal|panic):' \
-              "$DIAGNOSTICS_DIR/postgres.log" \
-            || grep --extended-regexp --ignore-case \
-              '[0-9]+:[A-Z][[:space:]].*[[:space:]]#[[:space:]]|(^|[|[:space:]])(warning|error|fatal|panic)(:|[[:space:]])' \
-              "$DIAGNOSTICS_DIR/redis.log"; then
-            echo "container logs contain a warning or error severity" >&2
-            exit 1
-          fi
-
-      - name: Collect container diagnostics
-        if: always()
-        shell: bash
-        run: |
-          set +e
-          mkdir -p "$DIAGNOSTICS_DIR"
-          raw_dir="$(mktemp -d)"
-          compose=(docker compose --project-name "$COMPOSE_PROJECT_NAME" \
-            -f deploy/compose.yaml)
-          "${compose[@]}" config > "$raw_dir/compose-config.yaml" 2>&1
-          "${compose[@]}" ps -a > "$raw_dir/compose-ps.txt" 2>&1
-          "${compose[@]}" logs --no-color --timestamps > "$raw_dir/compose.log" 2>&1
-          mapfile -t container_ids < <("${compose[@]}" ps -a -q)
-          if [ "${#container_ids[@]}" -gt 0 ]; then
-            docker inspect "${container_ids[@]}" > "$raw_dir/docker-inspect.json" 2>&1
-          fi
-          RAW_DIR="$raw_dir" OUTPUT_DIR="$DIAGNOSTICS_DIR" ruby <<'RUBY'
-          raw_dir = ENV.fetch("RAW_DIR")
-          output_dir = ENV.fetch("OUTPUT_DIR")
-          secrets = [
-            ENV.fetch("CI_ADMIN_PASSWORD"),
-            ENV.fetch("CI_POSTGRES_PASSWORD"),
-            ENV.fetch("CI_REDIS_PASSWORD"),
-          ]
-          encoded_secrets = secrets.map do |secret|
-            secret.encode("UTF-8").bytes.map do |byte|
-              character = byte.chr
-              character.match?(/[A-Za-z0-9]/) ? character : format("%%%02X", byte)
-            end.join
-          end
-
-          Dir.children(raw_dir).each do |name|
-            content = File.binread(File.join(raw_dir, name))
-            (secrets + encoded_secrets).each do |secret|
-              content = content.gsub(secret, "<redacted>")
-            end
-            File.binwrite(File.join(output_dir, name), content)
-          end
-          RUBY
-          rm -rf "$raw_dir"
-          cp trivy-results.sarif "$DIAGNOSTICS_DIR/" 2>/dev/null || true
-
-      - name: Upload container diagnostics
-        if: always()
-        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
-        with:
-          name: container-diagnostics-${{ github.run_id }}-${{ github.run_attempt }}
-          path: ${{ runner.temp }}/codex-proxy-rs-diagnostics
-          if-no-files-found: warn
-          retention-days: 7
-
-      - name: Remove isolated runtime
-        if: always()
-        shell: bash
-        run: |
-          docker compose --project-name "$COMPOSE_PROJECT_NAME" \
-            -f deploy/compose.yaml down --remove-orphans || true
-          sudo rm -rf "$GITHUB_WORKSPACE/.runtime" "$GITHUB_WORKSPACE/deploy/config.yaml"
+          image: ${{ env.CPR_IMAGE }}
+          platform: linux/amd64
+          artifact-name: container-diagnostics-${{ github.run_id }}-${{ github.run_attempt }}-amd64

.github/workflows/_quality.yml

@@ -33,6 +33,8 @@ jobs:
     timeout-minutes: 30
     env:
       CARGO_TERM_COLOR: always
+      # Rust 1.97 编译 AWS SDK 调试信息需要更大的 codegen 线程栈。
+      RUST_MIN_STACK: 16777216
       CPR_TEST_DATABASE_URL: postgres://codex_proxy:codex_proxy@127.0.0.1:5432/codex_proxy
       CPR_TEST_REDIS_URL: redis://127.0.0.1:6379
     services:

.github/workflows/ci.yml

@@ -50,6 +50,7 @@ jobs:
               - 'deploy/**'
               - '.dockerignore'
               - 'release/version.yaml'
+              - '.github/actions/**'
               - '.github/workflows/_container.yml'
               - '.github/workflows/ci.yml'
 

.github/workflows/release.yml

@@ -88,6 +88,13 @@ jobs:
           fail("Release tag #{release_tag} does not match #{version_path} tag #{expected_tag}") unless release_tag == expected_tag
           fail("#{version_path}: version #{version} is not a valid semver") unless version.match?(SEMVER)
 
+          notes_path = "release/notes.md"
+          fail("#{notes_path}: release notes are required") unless File.file?(notes_path)
+          notes = File.readlines(notes_path)
+          unless notes.first&.strip == "# #{release_tag}" && !notes.drop(1).join.strip.empty?
+            fail("#{notes_path}: expected non-empty notes starting with '# #{release_tag}'")
+          end
+
           platforms = platforms_data["platforms"]
           fail("#{platforms_path}: platforms must be a non-empty array") unless platforms.is_a?(Array) && !platforms.empty?
 
@@ -163,15 +170,6 @@ jobs:
       ref: ${{ needs.release-info.outputs.git_sha }}
       upload_frontend: true
 
-  container:
-    needs: [release-info]
-    permissions:
-      contents: read
-      security-events: write
-    uses: ./.github/workflows/_container.yml
-    with:
-      ref: ${{ needs.release-info.outputs.git_sha }}
-
   build-docker-binary:
     name: build-docker-binary (${{ matrix.os }}-${{ matrix.arch }})
     needs: release-info
@@ -194,8 +192,9 @@ jobs:
             ~/.cargo/registry
             ~/.cargo/git
             backend/target
-          key: cargo-v2-${{ runner.os }}-${{ matrix.target }}-${{ hashFiles('backend/Cargo.lock', 'backend/rust-toolchain.toml', 'backend/**/Cargo.toml', 'backend/.cargo/config.toml') }}
+          key: cargo-v2-${{ runner.os }}-${{ matrix.target }}-${{ hashFiles('backend/Cargo.lock', 'backend/rust-toolchain.toml', 'backend/**/Cargo.toml', 'backend/.cargo/config.toml') }}-${{ needs.release-info.outputs.git_sha }}
           restore-keys: |
+            cargo-v2-${{ runner.os }}-${{ matrix.target }}-${{ hashFiles('backend/Cargo.lock', 'backend/rust-toolchain.toml', 'backend/**/Cargo.toml', 'backend/.cargo/config.toml') }}
             cargo-v2-${{ runner.os }}-${{ matrix.target }}-
 
       - name: Build binary
@@ -259,8 +258,9 @@ jobs:
             ~/.cargo/registry
             ~/.cargo/git
             backend/target
-          key: cargo-v2-${{ runner.os }}-${{ matrix.target }}-${{ hashFiles('backend/Cargo.lock', 'backend/rust-toolchain.toml', 'backend/**/Cargo.toml', 'backend/.cargo/config.toml') }}
+          key: cargo-v2-${{ runner.os }}-${{ matrix.target }}-${{ hashFiles('backend/Cargo.lock', 'backend/rust-toolchain.toml', 'backend/**/Cargo.toml', 'backend/.cargo/config.toml') }}-${{ needs.release-info.outputs.git_sha }}
           restore-keys: |
+            cargo-v2-${{ runner.os }}-${{ matrix.target }}-${{ hashFiles('backend/Cargo.lock', 'backend/rust-toolchain.toml', 'backend/**/Cargo.toml', 'backend/.cargo/config.toml') }}
             cargo-v2-${{ runner.os }}-${{ matrix.target }}-
 
       - name: Build binary
@@ -408,6 +408,7 @@ jobs:
       contents: read
       packages: write
       id-token: write
+      security-events: write
     env:
       TRIVY_QUIET: 'true'
       TRIVY_SKIP_VERSION_CHECK: 'true'
@@ -491,22 +492,34 @@ jobs:
             org.opencontainers.image.source=https://github.com/zyycn/codex-proxy-rs
           tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:sha-${{ needs.release-info.outputs.git_sha }}-${{ matrix.arch }}
 
-      - name: Scan exact app image digest
-        uses: aquasecurity/trivy-action@ed142fd0673e97e23eac54620cfb913e5ce36c25 # v0.36.0
-        env:
-          TRIVY_PLATFORM: ${{ matrix.dockerPlatform }}
+      - name: Verify exact app image digest
+        uses: ./.github/actions/verify-container
         with:
-          image-ref: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@${{ steps.build-and-push.outputs.digest }}
-          version: v0.72.0
-          format: table
-          severity: HIGH,CRITICAL
-          vuln-type: os,library
-          scanners: vuln
-          ignore-unfixed: true
-          exit-code: '1'
+          image: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@${{ steps.build-and-push.outputs.digest }}
+          platform: ${{ matrix.dockerPlatform }}
+          artifact-name: container-diagnostics-${{ github.run_id }}-${{ github.run_attempt }}-${{ matrix.arch }}
+
+      - name: Record verified image digest
+        shell: bash
+        env:
+          IMAGE_DIGEST: ${{ steps.build-and-push.outputs.digest }}
+          IMAGE_ARCH: ${{ matrix.arch }}
+        run: |
+          set -euo pipefail
+          [[ "$IMAGE_DIGEST" =~ ^sha256:[a-f0-9]{64}$ ]]
+          mkdir -p dist/digests
+          printf '%s\n' "$IMAGE_DIGEST" > "dist/digests/linux-${IMAGE_ARCH}.txt"
+
+      - name: Upload verified image digest
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: image-digest-${{ matrix.os }}-${{ matrix.arch }}
+          path: dist/digests/*.txt
+          if-no-files-found: error
+          retention-days: 1
 
   publish:
-    needs: [release-info, package-assets, build-docker-image, container]
+    needs: [release-info, package-assets, build-docker-image]
     runs-on: ubuntu-latest
     timeout-minutes: 20
     permissions:
@@ -527,6 +540,13 @@ jobs:
           name: release-assets
           path: dist/release
 
+      - name: Download verified image digests
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+        with:
+          pattern: image-digest-*
+          path: dist/digests
+          merge-multiple: true
+
       - name: Setup Docker Buildx
         uses: docker/setup-buildx-action@37fe631027851001ddb9b187196cc803df7f5f0e # v4.3.0
 
@@ -558,7 +578,12 @@ jobs:
             platform="${platform//[[:space:]]/}"
             [ -n "${platform}" ] || continue
             arch="${platform##*/}"
-            sources+=("${image}:sha-${GIT_SHA}-${arch}")
+            digest="$(cat "dist/digests/linux-${arch}.txt")"
+            if [[ ! "$digest" =~ ^sha256:[a-f0-9]{64}$ ]]; then
+              echo "invalid verified image digest for ${platform}" >&2
+              exit 1
+            fi
+            sources+=("${image}@${digest}")
           done
 
           if [ "${#sources[@]}" -eq 0 ]; then
@@ -625,15 +650,10 @@ jobs:
 
           cosign sign --yes "${images[@]}"
 
-      - name: Publish GitHub Release
-        uses: softprops/action-gh-release@3d0d9888cb7fd7b750713d6e236d1fcb99157228 # v3.0.2
-        with:
-          tag_name: ${{ needs.release-info.outputs.tag }}
-          generate_release_notes: true
-          previous_tag: ${{ needs.release-info.outputs.previous_tag }}
-          prerelease: ${{ needs.release-info.outputs.prerelease == 'true' }}
-          make_latest: ${{ needs.release-info.outputs.prerelease == 'true' && 'false' || 'true' }}
-          body: |
+      - name: Prepare release notes
+        shell: bash
+        env:
+          INSTALLATION_NOTES: |
             > [!WARNING]
             > **Upgrading across major versions?** Online upgrades across major versions are not supported. Deploy the new major fresh with a new `.runtime/` data directory, then re-import or re-authorize provider accounts and client keys. See the [upgrade notes](https://github.com/${{ github.repository }}/blob/main/deploy/README.md#镜像升级与源码构建).
 
@@ -654,6 +674,26 @@ jobs:
 
             - [GitHub Repository](https://github.com/${{ github.repository }})
             - [Installation Guide](https://github.com/${{ github.repository }}/blob/main/deploy/README.md)
+        run: |
+          python3 <<'PY'
+          import os
+          from pathlib import Path
+
+          notes = "\n".join(Path("release/notes.md").read_text().splitlines()[1:]).strip()
+          installation = os.environ["INSTALLATION_NOTES"].strip()
+          output = Path(os.environ["RUNNER_TEMP"]) / "release-notes.md"
+          output.write_text(f"{notes}\n\n{installation}\n")
+          PY
+
+      - name: Publish GitHub Release
+        uses: softprops/action-gh-release@efb35369e0ad2afab669f228072c1b0d510eae64 # v3.0.3
+        with:
+          tag_name: ${{ needs.release-info.outputs.tag }}
+          generate_release_notes: true
+          previous_tag: ${{ needs.release-info.outputs.previous_tag }}
+          prerelease: ${{ needs.release-info.outputs.prerelease == 'true' }}
+          make_latest: ${{ needs.release-info.outputs.prerelease == 'true' && 'false' || 'true' }}
+          body_path: ${{ runner.temp }}/release-notes.md
           fail_on_unmatched_files: true
           files: |
             dist/release/*

LICENSE

@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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+   See the License for the specific language governing permissions and
+   limitations under the License.

README.md

@@ -5,195 +5,129 @@
 
 # Codex Proxy RS
 
-**基于 Rust 的多 Provider 透明 AI 网关**
+面向 Codex 的自托管多账号 AI 网关。
 
 [![CI](https://github.com/zyycn/codex-proxy-rs/actions/workflows/ci.yml/badge.svg)](https://github.com/zyycn/codex-proxy-rs/actions/workflows/ci.yml)
 [![Release](https://img.shields.io/github/v/release/zyycn/codex-proxy-rs?display_name=tag&sort=semver&style=flat-square)](https://github.com/zyycn/codex-proxy-rs/releases)
 [![GHCR](https://img.shields.io/badge/GHCR-codex--proxy--rs-2496ED?logo=docker&logoColor=white&style=flat-square)](https://github.com/zyycn/codex-proxy-rs/pkgs/container/codex-proxy-rs)
-[![MIT](https://img.shields.io/badge/License-MIT-blue.svg?style=flat-square)](https://opensource.org/license/mit)
+[![License: Apache 2.0](https://img.shields.io/badge/License-Apache%202.0-blue.svg?style=flat-square)](LICENSE)
 
-[快速开始](#快速开始) · [客户端接入](#客户端接入) · [运行维护](#运行维护) · [部署](deploy/README.md) · [接口](docs/api.md) · [架构](docs/architecture.md)
+[功能](#功能) · [快速开始](#快速开始) · [客户端接入](#客户端接入) · [文档](#文档) · [社区](#社区) · [许可证](#许可证)
 
 </div>
 
-> [!NOTE]
-> 数据面支持 OpenAI Responses、Images 和模型目录协议，不提供 `/v1/chat/completions`。
+将 OpenAI、xAI 账号接入同一个服务，通过网页管理账号、分配客户端密钥和查看使用情况。
+客户端使用统一的访问地址与代理密钥，上游账号凭据由服务端管理。
 
 ## 功能
 
-| 领域 | 当前能力 |
-| --- | --- |
-| 数据面 | Responses JSON、SSE、WebSocket、review 子代理、Images 生成/编辑与模型目录 |
-| Provider | 固定 `openai`、`xai` 两个 Provider，各自拥有 OAuth、credential、额度、目录与 transport |
-| 路由 | Client Key 限定账号分组；按模型能力编译 Provider 候选；支持全局精确模型映射、会话亲和和安全 fallback |
-| 透明边界 | OpenAI 保留未知请求字段及字段顺序，并原样转发 SSE、WebSocket 与 Images 业务字节；xAI 在 Provider 内转换协议 |
-| 账号 | OAuth、OpenAI AT/RT 与账号文件导入，credential/额度刷新、账号恢复及主动额度重置卡 |
-| 管理 | 账号与分组、Client Key、运行设置、用量/错误观测、S3/R2 备份、系统更新与回滚 |
-| 计量 | Token、图片、费用、延迟、账号与 Provider 归因，并记录上游响应确认的实际 `service_tier` |
+- **账号管理**：OAuth 授权、账号导入、凭据刷新与额度查看；支持独立出站代理及 sub2api OpenAI 账号代理导入。
+- **访问控制**：通过账号分组分配密钥权限，设置日/周 USD 限额、并发和请求频率。
+- **客户端接入**：支持 Codex CLI、桌面端与 Responses API 客户端，提供 HTTP 流式响应和 WebSocket。
+- **请求诊断**：查看请求记录、用量、费用、延迟和错误详情。
+- **部署运维**：Docker Compose 部署、S3/R2 数据库备份、同大版本在线更新与回滚。
 
-架构边界、状态所有权和请求不变量见 [架构文档](docs/architecture.md)。
+图片生成、编辑和 Codex 独立搜索由 OpenAI 账号提供；模型与功能的可用性取决于上游账号权限。
+
+> [!NOTE]
+> 本项目提供 Responses API，不支持 `/v1/chat/completions`。接入前请确认客户端支持 Responses 协议。
 
 ## 快速开始
 
-需要 Docker Engine 与 Docker Compose Plugin。
+使用 Docker Compose 部署发布镜像 `ghcr.io/zyycn/codex-proxy-rs:latest`，同时启动 PostgreSQL 和 Redis。
+以下命令适用于 Linux amd64/arm64，需要 Docker Engine、Docker Compose Plugin、curl 和 OpenSSL。已有部署请先看
+[升级说明](deploy/README.md#镜像升级与源码构建)，不要覆盖原配置。
 
-### 1. 准备配置和目录
+### 1. 下载部署文件并配置
 
 ```bash
-git clone https://github.com/zyycn/codex-proxy-rs.git
+mkdir -p codex-proxy-rs/deploy
 cd codex-proxy-rs
 
+curl -fsSL https://raw.githubusercontent.com/zyycn/codex-proxy-rs/main/deploy/compose.yaml \
+  -o deploy/compose.yaml
+curl -fsSL https://raw.githubusercontent.com/zyycn/codex-proxy-rs/main/deploy/config.example.yaml \
+  -o deploy/config.example.yaml
+
 mkdir -p .runtime/data .runtime/logs
 install -d -m 0750 .runtime/postgres .runtime/redis
 cp deploy/config.example.yaml deploy/config.yaml
 sudo chown "$(id -u):10001" deploy/config.yaml
 chmod 0640 deploy/config.yaml
-```
-
-分别生成 PostgreSQL 与 Redis 密码：
-
-```bash
-openssl rand -hex 24
-openssl rand -hex 24
-```
-
-把两个结果分别写入 `deploy/config.yaml`，再设置管理员初始密码：
-
-| 配置 | 约束 |
-| --- | --- |
-| `store.database.password` | 48 位十六进制 |
-| `store.redis.password` | 48 位十六进制 |
-| `admin.default_password` | 至少 12 位，不能包含 `$` |
-
-PostgreSQL、Redis 和应用从同一份 `config.yaml` 读取基础设施密码，不需要额外导出环境变量。
-管理员密码只在首次创建管理员时生效。
-
-Linux 需要允许容器组写入运行目录：
-
-```bash
 sudo chown -R "$(id -u):10001" .runtime/data .runtime/logs
 chmod 0770 .runtime/data .runtime/logs
 ```
 
-### 2. 启动
+分别生成数据库和 Redis 密码：
+
+```bash
+openssl rand -hex 24
+openssl rand -hex 24
+```
+
+编辑 `deploy/config.yaml`，填好以下三项：
+
+| 配置项 | 填写内容 |
+| --- | --- |
+| `store.database.password` | 第一个生成的 48 位十六进制密码 |
+| `store.redis.password` | 第二个生成的 48 位十六进制密码 |
+| `admin.default_password` | 管理员初始密码，至少 12 位，不能包含 `$` |
+
+不需要创建 `.env`。管理员初始密码只在首次创建账号时使用。
+
+### 2. 启动服务
 
 ```bash
 docker compose -f deploy/compose.yaml config --quiet
 docker compose -f deploy/compose.yaml pull
-docker compose -f deploy/compose.yaml up -d --no-build
+docker compose -f deploy/compose.yaml up -d --no-build --wait
 curl -i http://127.0.0.1:8080/healthz
 ```
 
-`204 No Content` 表示应用、PostgreSQL 与 Redis 均可用。管理端地址为
-`http://127.0.0.1:8080`。
+健康检查返回 `204 No Content` 后，打开 `http://127.0.0.1:8080`，
+使用 `admin@cpr.local` 和刚设置的管理员密码登录。
 
-### 3. 初始化网关
+默认地址只能在服务器本机访问。从其他设备使用时，需要配置
+[HTTPS 反向代理](deploy/README.md#公网访问)。
 
-1. 使用 `admin@cpr.local` 与初始密码登录。
-2. 导入或授权 Provider 账号：OpenAI 支持 OAuth、逐行 AT/RT 与 OAuth JSON；
-   xAI 支持 OAuth 和账号 JSON。
-3. 创建账号分组并按需配置全局模型映射。未命中的模型名原样交给候选 Provider。
-4. 创建 `sk_...` Client Key，选择可用账号分组，并设置速率和并发限制；空分组范围表示全部账号。
+### 3. 添加账号与客户端密钥
 
-OpenAI RT 导入会先向官方 token endpoint 换取 AT；仅 AT 的账号不具备自动续期能力，
-能否参与调度仍取决于 token 中可验证的身份与后续上游事实。账号导入和首次 OAuth 创建会尽力读取一次额度，
-额度上游暂时失败不会回滚已提交的账号。
-
-OpenAI 账号的主动重置卡只在用户打开相应弹窗或手工刷新时查询。消费成功后管理端重新查询卡片与额度；
-系统不会通过修改本地 `reset_at` 伪造重置。完整账号合同见 [账号接口](docs/api.md#5-账号)。
-
-> [!IMPORTANT]
-> xAI 使用 OAuth session，不支持把 xAI API Key 作为上游 credential。
-
-完整的权限、密码轮换、备份和升级规则见 [部署文档](deploy/README.md)。
+1. 在「账号」中添加 OpenAI 或 xAI 账号，完成授权或导入。
+2. 按需建立账号分组，再创建客户端密钥并选择可用分组。**不选分组表示可使用全部账号**。
+3. 打开密钥的「使用密钥」，复制客户端配置。
 
 ## 客户端接入
 
+**Codex CLI / 桌面端**：在「使用密钥」中按操作系统复制配置，或通过 CCSwitch 导入。
+合并到客户端配置后重启 Codex。完整步骤、生图配置与排障见[客户端配置](deploy/README.md#客户端配置)。
+
+**其他 Responses API 客户端**：填写以下信息。
+
 | 配置 | 值 |
 | --- | --- |
-| Base URL | `http://127.0.0.1:8080/v1` |
-| API Key | 管理端创建的 `sk_...` |
-| 鉴权 | `Authorization: Bearer <client-api-key>` |
+| Base URL | `http://127.0.0.1:8080/v1`；远程接入使用服务器的 HTTPS 地址 |
+| API Key | 管理端创建的 `sk_...` 客户端密钥 |
+
+可用模型以该密钥查询到的模型列表为准：
 
 ```bash
 curl http://127.0.0.1:8080/v1/models \
   -H 'Authorization: Bearer <client-api-key>'
-
-curl http://127.0.0.1:8080/v1/responses \
-  -H 'Authorization: Bearer <client-api-key>' \
-  -H 'Content-Type: application/json' \
-  -d '{
-    "model": "<model-id>",
-    "input": "Reply with pong.",
-    "stream": false
-  }'
 ```
 
-<details>
-<summary>公开数据面路由</summary>
-
-| 路由 | 用途 |
-| --- | --- |
-| `POST /v1/responses` | JSON 响应或 SSE Responses 流 |
-| `GET /v1/responses` | Responses WebSocket 升级 |
-| `POST /v1/responses/review` | review 子代理请求 |
-| `POST /v1/images/generations` | OpenAI Images 生成 JSON 透明转发 |
-| `POST /v1/images/edits` | OpenAI Images 编辑 JSON 透明转发 |
-| `GET /v1/models` | 当前 Client Key 账号范围内的模型列表 |
-| `GET /v1/models/catalog` | Codex 客户端展示用模型目录 |
-| `GET /v1/models/{model_id}/info` | Codex 客户端展示用模型详情 |
-| `GET /v1/models/{model_id}` | OpenAI 兼容模型详情 |
-
-所有 `/v1/*` 路由都需要 Client Key。Images 是 OpenAI Provider 自有端点，不读取模型字段，也不参与
-文本模型映射。
-
-</details>
-
-完整的客户端与管理端路由、鉴权、请求字段和 mutation 语义见 [接口文档](docs/api.md)。
-
-## 运行维护
-
-```bash
-# 同一大版本内升级发布镜像
-docker compose -f deploy/compose.yaml pull codex-proxy-rs
-docker compose -f deploy/compose.yaml up -d --no-build
-
-# 查看日志
-docker compose -f deploy/compose.yaml logs -f codex-proxy-rs
-
-# 从当前源码构建
-docker compose -f deploy/compose.yaml build codex-proxy-rs
-docker compose -f deploy/compose.yaml up -d
-```
-
-> [!IMPORTANT]
-> `.runtime/` 保存 PostgreSQL、Redis、日志、OpenAI 会话锚点和在线更新状态。删除该目录会永久清除
-> 本地运行状态。
-
-> [!WARNING]
-> 不支持跨大版本在线升级。升级到新的大版本时请使用全新的 `.runtime/` 数据目录，并重新导入或授权
-> Provider 账号与 Client Key。
-
-Compose 默认只绑定 `127.0.0.1`。公网接入应使用 HTTPS 反向代理，转发 WebSocket upgrade 与真实客户端
-IP；不要暴露 PostgreSQL 或 Redis。当前运行拓扑为单副本，不能通过复制应用容器扩容。
-
-## 维护与发布
-
-仓库版本只能从干净、已同步上游的发布分支发布：
-
-```bash
-release/publish <version>
-```
-
-脚本依赖已登录的 GitHub CLI（`gh auth login`），会更新 `release/version.yaml`、创建约定提交和带注释的
-`v<version>` tag，原子推送分支与 tag，再触发 Release 构建。源码提交、仓库发版和运行实例升级是三个
-独立状态；脚本不会登录服务器或改变任何运行实例。
-
 ## 文档
 
-- [部署与运维](deploy/README.md)
-- [客户端与管理端接口](docs/api.md)
+- [客户端接入与生图](deploy/README.md#客户端配置)
+- [部署、备份与恢复](deploy/README.md)
+- [API 参考](docs/api.md)
 - [系统架构](docs/architecture.md)
-- [数据库迁移规则](backend/migrations/README.md)
-- [Release](https://github.com/zyycn/codex-proxy-rs/releases)
-- [容器镜像](https://github.com/zyycn/codex-proxy-rs/pkgs/container/codex-proxy-rs)
+- [管理端主题](docs/theme.md)
+- [数据库迁移](backend/migrations/README.md)
+
+## 社区
+
+感谢 [LINUX DO](https://linux.do) 社区提供开放、友善的技术交流平台。
+
+## 许可证
+
+本项目基于 [Apache License 2.0](LICENSE) 开源。

backend/Cargo.lock

@@ -154,9 +154,9 @@ dependencies = [
 
 [[package]]
 name = "aws-lc-rs"
-version = "1.17.1"
+version = "1.18.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4342d8937fc7e5dd9b1c60292261c0670c882a2cd1719cfc11b1af41731e32ad"
+checksum = "b281d307588d634de920874890732659e2e7672f72b5e10e81badc1a8a83621e"
 dependencies = [
  "aws-lc-sys",
  "untrusted 0.7.1",
@@ -165,9 +165,9 @@ dependencies = [
 
 [[package]]
 name = "aws-lc-sys"
-version = "0.42.0"
+version = "0.45.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6d9ceb1da931507a12f4fccea479dccd00da1943e1b4ae72d8e502d707361444"
+checksum = "9bff6c3b54fad79a2e60b8102caf565819711497c1f5f092f49508e2f5c31b27"
 dependencies = [
  "cc",
  "cmake",
@@ -195,7 +195,7 @@ dependencies = [
  "bytes-utils",
  "fastrand",
  "http 0.2.12",
- "http 1.4.2",
+ "http 1.4.0",
  "http-body 0.4.6",
  "http-body 1.0.1",
  "percent-encoding",
@@ -231,7 +231,7 @@ dependencies = [
  "hex",
  "hmac",
  "http 0.2.12",
- "http 1.4.2",
+ "http 1.4.0",
  "http-body 1.0.1",
  "lru",
  "percent-encoding",
@@ -257,7 +257,7 @@ dependencies = [
  "hex",
  "hmac",
  "http 0.2.12",
- "http 1.4.2",
+ "http 1.4.0",
  "percent-encoding",
  "sha2 0.11.0",
  "time",
@@ -286,7 +286,7 @@ dependencies = [
  "bytes",
  "crc-fast",
  "hex",
- "http 1.4.2",
+ "http 1.4.0",
  "http-body 1.0.1",
  "http-body-util",
  "md-5",
@@ -320,7 +320,7 @@ dependencies = [
  "bytes-utils",
  "futures-core",
  "futures-util",
- "http 1.4.2",
+ "http 1.4.0",
  "http-body 1.0.1",
  "http-body-util",
  "percent-encoding",
@@ -339,7 +339,7 @@ dependencies = [
  "aws-smithy-runtime-api",
  "aws-smithy-types",
  "h2",
- "http 1.4.2",
+ "http 1.4.0",
  "hyper",
  "hyper-rustls",
  "hyper-util",
@@ -389,7 +389,7 @@ dependencies = [
  "bytes",
  "fastrand",
  "http 0.2.12",
- "http 1.4.2",
+ "http 1.4.0",
  "http-body 0.4.6",
  "http-body 1.0.1",
  "http-body-util",
@@ -401,16 +401,16 @@ dependencies = [
 
 [[package]]
 name = "aws-smithy-runtime-api"
-version = "1.15.0"
+version = "1.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "954c563ce84507722d2679f07a35d21b9c6466b3872d513020d0281fc8112ac9"
+checksum = "9c054752dd9e4dc73d0b75748c99ac2d0feafbf2f25c7b0516f03a3534161223"
 dependencies = [
  "aws-smithy-async",
  "aws-smithy-runtime-api-macros",
  "aws-smithy-types",
  "bytes",
  "http 0.2.12",
- "http 1.4.2",
+ "http 1.4.0",
  "pin-project-lite",
  "tokio",
  "tracing",
@@ -436,21 +436,21 @@ checksum = "7d56e0a4e53127a632224e43633b0fe045fa9e1e3cfc68b9830f1115e103f910"
 dependencies = [
  "aws-smithy-runtime-api",
  "aws-smithy-types",
- "http 1.4.2",
+ "http 1.4.0",
 ]
 
 [[package]]
 name = "aws-smithy-types"
-version = "1.6.2"
+version = "1.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fce83ce9abbb198d25bc7131e468d0f9fe1257125e58c39f3f9fc9f5098c9647"
+checksum = "8f94d16e797ec62cd999fc9d5942b48fa7050c3093ddadff48e4d7528d16fcb9"
 dependencies = [
  "base64-simd",
  "bytes",
  "bytes-utils",
  "futures-core",
  "http 0.2.12",
- "http 1.4.2",
+ "http 1.4.0",
  "http-body 0.4.6",
  "http-body 1.0.1",
  "http-body-util",
@@ -503,7 +503,7 @@ dependencies = [
  "bytes",
  "form_urlencoded",
  "futures-util",
- "http 1.4.2",
+ "http 1.4.0",
  "http-body 1.0.1",
  "http-body-util",
  "hyper",
@@ -535,7 +535,7 @@ checksum = "08c78f31d7b1291f7ee735c1c6780ccde7785daae9a9206026862dab7d8792d1"
 dependencies = [
  "bytes",
  "futures-core",
- "http 1.4.2",
+ "http 1.4.0",
  "http-body 1.0.1",
  "http-body-util",
  "mime",
@@ -1191,7 +1191,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "39cab71617ae0d63f51a36d69f866391735b51691dbda63cf6f96d042b63efeb"
 dependencies = [
  "libc",
- "windows-sys 0.61.2",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -1258,9 +1258,9 @@ checksum = "5baebc0774151f905a1a2cc41989300b1e6fbb29aff0ceffa1064fdd3088d582"
 
 [[package]]
 name = "flate2"
-version = "1.1.9"
+version = "1.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "843fba2746e448b37e26a819579957415c8cef339bf08564fe8b7ddbd959573c"
+checksum = "6e634e2e0ebac1ee034020da1ca582e17ffe4e0f5e985823721e168928136dcb"
 dependencies = [
  "crc32fast",
  "miniz_oxide",
@@ -1467,7 +1467,7 @@ dependencies = [
  "tokio",
  "tokio-tungstenite 0.29.0",
  "tower",
- "tower-http 0.7.0",
+ "tower-http 0.7.1",
  "tracing",
  "url",
  "uuid",
@@ -1478,14 +1478,17 @@ name = "gateway-core"
 version = "0.1.0"
 dependencies = [
  "async-trait",
+ "base64 0.23.1",
  "bytes",
  "futures",
  "futures-timer",
  "semver",
  "serde",
  "serde_json",
+ "sha2 0.11.0",
  "thiserror",
  "tracing",
+ "url",
  "uuid",
 ]
 
@@ -1533,6 +1536,7 @@ dependencies = [
 name = "gateway-store"
 version = "0.1.0"
 dependencies = [
+ "async-stream",
  "async-trait",
  "aws-credential-types",
  "aws-sdk-s3",
@@ -1638,7 +1642,7 @@ dependencies = [
  "fnv",
  "futures-core",
  "futures-sink",
- "http 1.4.2",
+ "http 1.4.0",
  "indexmap",
  "slab",
  "tokio",
@@ -1686,7 +1690,7 @@ dependencies = [
  "base64 0.22.1",
  "bytes",
  "headers-core",
- "http 1.4.2",
+ "http 1.4.0",
  "httpdate",
  "mime",
  "sha1 0.10.7",
@@ -1698,7 +1702,7 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "54b4a22553d4242c49fddb9ba998a99962b5cc6f22cb5a3482bec22522403ce4"
 dependencies = [
- "http 1.4.2",
+ "http 1.4.0",
 ]
 
 [[package]]
@@ -1760,9 +1764,9 @@ dependencies = [
 
 [[package]]
 name = "http"
-version = "1.4.2"
+version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6970f50e31d6fc17d3fa27329444bfa74e196cf62e95052a3f6fee181dba6425"
+checksum = "e3ba2a386d7f85a81f119ad7498ebe444d2e22c2af0b86b069416ace48b3311a"
 dependencies = [
  "bytes",
  "itoa",
@@ -1786,7 +1790,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1efedce1fb8e6913f23e0c92de8e62cd5b772a67e7b3946df930a62566c93184"
 dependencies = [
  "bytes",
- "http 1.4.2",
+ "http 1.4.0",
 ]
 
 [[package]]
@@ -1797,7 +1801,7 @@ checksum = "b021d93e26becf5dc7e1b75b1bed1fd93124b374ceb73f43d4d4eafec896a64a"
 dependencies = [
  "bytes",
  "futures-core",
- "http 1.4.2",
+ "http 1.4.0",
  "http-body 1.0.1",
  "pin-project-lite",
 ]
@@ -1833,16 +1837,16 @@ dependencies = [
 
 [[package]]
 name = "hyper"
-version = "1.10.1"
+version = "1.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "55281c53a1894c864990125767da440a4e630446785086f52523b20033b74498"
+checksum = "27b501faa50e7a26c3d3560ca625132f4078a17771f4810baf70475ae48cbe43"
 dependencies = [
  "atomic-waker",
  "bytes",
  "futures-channel",
  "futures-core",
  "h2",
- "http 1.4.2",
+ "http 1.4.0",
  "http-body 1.0.1",
  "httparse",
  "httpdate",
@@ -1859,7 +1863,7 @@ version = "0.27.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e3c93eb611681b207e1fe55d5a71ecf91572ec8a6705cdb6857f7d8d5242cf58"
 dependencies = [
- "http 1.4.2",
+ "http 1.4.0",
  "hyper",
  "hyper-util",
  "log",
@@ -1874,14 +1878,13 @@ dependencies = [
 [[package]]
 name = "hyper-util"
 version = "0.1.20"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "96547c2556ec9d12fb1578c4eaf448b04993e7fb79cbaad930a656880a6bdfa0"
+source = "git+https://github.com/hyperium/hyper-util?rev=191b1acf0a6b18e807e4abf5a6d4a7c47979ecd6#191b1acf0a6b18e807e4abf5a6d4a7c47979ecd6"
 dependencies = [
- "base64 0.22.1",
+ "base64 0.23.1",
  "bytes",
  "futures-channel",
  "futures-util",
- "http 1.4.2",
+ "http 1.4.0",
  "http-body 1.0.1",
  "hyper",
  "ipnet",
@@ -2210,9 +2213,9 @@ dependencies = [
 
 [[package]]
 name = "miniz_oxide"
-version = "0.8.9"
+version = "0.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1fa76a2c86f704bdb222d66965fb3d63269ce38518b83cb0575fca855ebb6316"
+checksum = "b63fbc4a50860e98e7b2aa7804ded1db5cbc3aff9193adaff57a6931bf7c4b4c"
 dependencies = [
  "adler2",
  "simd-adler32",
@@ -2593,6 +2596,7 @@ version = "0.0.0"
 dependencies = [
  "async-stream",
  "async-trait",
+ "aws-lc-rs",
  "base64 0.23.1",
  "bytes",
  "chrono",
@@ -2604,7 +2608,9 @@ dependencies = [
  "gateway-protocol",
  "getrandom 0.4.3",
  "hex",
+ "hyper",
  "hyper-rustls",
+ "hyper-util",
  "reqwest",
  "roxmltree",
  "rustls",
@@ -2619,8 +2625,10 @@ dependencies = [
  "tempfile",
  "thiserror",
  "tokio",
+ "tokio-rustls",
  "tokio-tungstenite 0.28.0",
  "tokio-util",
+ "tower-service",
  "tracing",
  "tracing-subscriber",
  "tungstenite 0.27.0",
@@ -2729,7 +2737,7 @@ dependencies = [
  "once_cell",
  "socket2",
  "tracing",
- "windows-sys 0.61.2",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -2910,7 +2918,7 @@ dependencies = [
  "futures-core",
  "futures-util",
  "h2",
- "http 1.4.2",
+ "http 1.4.0",
  "http-body 1.0.1",
  "http-body-util",
  "hyper",
@@ -2999,7 +3007,7 @@ dependencies = [
  "errno",
  "libc",
  "linux-raw-sys",
- "windows-sys 0.61.2",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -3701,7 +3709,7 @@ dependencies = [
  "getrandom 0.4.3",
  "once_cell",
  "rustix",
- "windows-sys 0.61.2",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -3911,7 +3919,7 @@ dependencies = [
  "bitflags",
  "bytes",
  "futures-util",
- "http 1.4.2",
+ "http 1.4.0",
  "http-body 1.0.1",
  "pin-project-lite",
  "tower",
@@ -3922,15 +3930,15 @@ dependencies = [
 
 [[package]]
 name = "tower-http"
-version = "0.7.0"
+version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b11f75e912b0c2be01b63d8cf8057b8c3f97cf34abb3d431a3a4c8675498e233"
+checksum = "08a05a66a4fdd61cbbe0a1d755ffe0ca6aba159dd4820936a0ff8a8278245b9c"
 dependencies = [
  "bitflags",
  "bytes",
  "futures-core",
  "futures-util",
- "http 1.4.2",
+ "http 1.4.0",
  "http-body 1.0.1",
  "http-body-util",
  "http-range-header",
@@ -4062,7 +4070,7 @@ dependencies = [
  "data-encoding",
  "flate2",
  "headers",
- "http 1.4.2",
+ "http 1.4.0",
  "httparse",
  "log",
  "rand 0.9.4",
@@ -4081,7 +4089,7 @@ checksum = "6c01152af293afb9c7c2a57e4b559c5620b421f6d133261c60dd2d0cdb38e6b8"
 dependencies = [
  "bytes",
  "data-encoding",
- "http 1.4.2",
+ "http 1.4.0",
  "httparse",
  "log",
  "rand 0.9.4",
@@ -4331,9 +4339,9 @@ dependencies = [
 
 [[package]]
 name = "webpki-roots"
-version = "1.0.8"
+version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bf85cb06032201fa7c6f829d7db5a7e5aa45bcc0655327713065f6f0576731bf"
+checksum = "12bed680863276c63889429bfd6cab3b99943659923822de1c8a39c49e4d722c"
 dependencies = [
  "rustls-pki-types",
 ]
@@ -4535,7 +4543,7 @@ dependencies = [
  "base64 0.22.1",
  "deadpool",
  "futures",
- "http 1.4.2",
+ "http 1.4.0",
  "http-body-util",
  "hyper",
  "hyper-util",

backend/Cargo.toml

@@ -15,7 +15,7 @@ resolver = "3"
 [workspace.package]
 version = "0.0.0"
 edition = "2024"
-license = "MIT"
+license = "Apache-2.0"
 publish = false
 rust-version = "1.97"
 
@@ -38,3 +38,7 @@ strip = "symbols"
 lto = "thin"
 codegen-units = 1
 panic = "abort"
+
+[patch.crates-io]
+# Upstream SOCKS IPv6 fix; remove once a release includes hyperium/hyper-util#302.
+hyper-util = { git = "https://github.com/hyperium/hyper-util", rev = "191b1acf0a6b18e807e4abf5a6d4a7c47979ecd6" }

backend/apps/gateway/Cargo.toml

@@ -26,7 +26,7 @@ tokio = { version = "1.52.3", default-features = false, features = ["rt-multi-th
 [dev-dependencies]
 config = { version = "0.15.23", default-features = false, features = ["yaml"] }
 serde_json = "1"
-syn = { version = "3.0.3", features = ["full"] }
+syn = { version = "3.0.3", features = ["full", "visit"] }
 tempfile = "3.27.0"
 
 [lints]

backend/apps/gateway/src/bootstrap.rs

@@ -87,6 +87,7 @@ pub async fn run() -> Result<(), BootstrapError> {
 
     let mut probes = store.health_probes();
     probes.extend(core.health_probes());
+    probes.push(host.logging_health_probe());
     let api = gateway_api::initialize(
         api,
         core.execution_service(),

backend/apps/gateway/tests/architecture.rs

@@ -6,7 +6,7 @@ use std::{
     path::{Path, PathBuf},
 };
 
-use syn::Item;
+use syn::{Item, visit::Visit};
 
 /// workspace 成员冻结清单;新增 crate 必须同步扩展本文件的依赖规则。
 pub(super) const WORKSPACE_MEMBERS: &[&str] = &[
@@ -61,6 +61,82 @@ fn gateway_core_depends_on_no_http_db_redis_or_provider_crate() {
     );
 }
 
+#[test]
+fn core_value_owners_do_not_depend_on_execution_or_routing() {
+    let root = backend_root().join("crates/gateway-core/src");
+    for relative in super::rust_files(&root) {
+        let allowed: Option<&[&str]> = match relative.to_str().expect("source path") {
+            "validation.rs" => Some(&[]),
+            "identity.rs" => Some(&["validation"]),
+            "upstream.rs" => Some(&["validation"]),
+            "event.rs" => Some(&["metering", "operation", "upstream", "validation"]),
+            "account/store.rs" => Some(&["account", "error", "identity", "validation"]),
+            path if path.starts_with("policy/") => Some(&["account", "policy", "validation"]),
+            path if path.starts_with("account/") => Some(&["account", "identity", "validation"]),
+            _ => None,
+        };
+        let Some(allowed) = allowed else { continue };
+        let source = fs::read_to_string(root.join(&relative)).expect("read core source");
+        let syntax = syn::parse_file(&source).expect("parse core source");
+        let mut references = CrateReferences::default();
+        references.visit_file(&syntax);
+        for dependency in references.0 {
+            assert!(
+                allowed.contains(&dependency.as_str()),
+                "{} must not depend on crate::{dependency}",
+                relative.display()
+            );
+        }
+    }
+}
+
+#[derive(Default)]
+struct CrateReferences(BTreeSet<String>);
+
+impl<'ast> Visit<'ast> for CrateReferences {
+    fn visit_path(&mut self, path: &'ast syn::Path) {
+        let mut segments = path.segments.iter();
+        if segments
+            .next()
+            .is_some_and(|segment| segment.ident == "crate")
+            && let Some(owner) = segments.next()
+        {
+            self.0.insert(owner.ident.to_string());
+        }
+        syn::visit::visit_path(self, path);
+    }
+
+    fn visit_item_use(&mut self, item: &'ast syn::ItemUse) {
+        self.use_tree(&item.tree, false);
+    }
+}
+
+impl CrateReferences {
+    fn use_tree(&mut self, tree: &syn::UseTree, crate_root: bool) {
+        match tree {
+            syn::UseTree::Path(path) if crate_root => {
+                self.0.insert(path.ident.to_string());
+            }
+            syn::UseTree::Name(name) if crate_root => {
+                self.0.insert(name.ident.to_string());
+            }
+            syn::UseTree::Rename(rename) if crate_root => {
+                self.0.insert(rename.ident.to_string());
+            }
+            syn::UseTree::Path(path) => self.use_tree(&path.tree, path.ident == "crate"),
+            syn::UseTree::Group(group) => {
+                for item in &group.items {
+                    self.use_tree(item, crate_root);
+                }
+            }
+            syn::UseTree::Glob(_) if crate_root => {
+                self.0.insert("*".to_owned());
+            }
+            _ => {}
+        }
+    }
+}
+
 #[test]
 fn gateway_protocol_has_no_workspace_dependencies() {
     for name in dependency_names("crates/gateway-protocol") {
@@ -156,6 +232,46 @@ const ALLOWED_INTERNAL_EDGES: &[(&str, &str)] = &[
 #[test]
 fn workspace_internal_dependency_edges_match_frozen_dag() {
     let metadata = cargo_metadata_json();
+    let actual = workspace_runtime_dependency_edges(&metadata);
+    let mut expected: Vec<(String, String)> = ALLOWED_INTERNAL_EDGES
+        .iter()
+        .map(|(from, to)| ((*from).to_owned(), (*to).to_owned()))
+        .collect();
+    expected.sort();
+
+    assert_eq!(
+        actual, expected,
+        "workspace internal dependency edges diverged from the frozen DAG"
+    );
+}
+
+#[test]
+fn runtime_dependency_edges_exclude_dev_build_and_external_dependencies() {
+    let metadata = serde_json::json!({
+        "packages": [
+            {
+                "name": "gateway-api",
+                "dependencies": [
+                    { "name": "gateway-core", "kind": null },
+                    { "name": "gateway-store", "kind": "dev" },
+                    { "name": "gateway-host", "kind": "build" },
+                    { "name": "serde", "kind": null }
+                ]
+            },
+            {
+                "name": "external-package",
+                "dependencies": [{ "name": "gateway-core", "kind": null }]
+            }
+        ]
+    });
+
+    assert_eq!(
+        workspace_runtime_dependency_edges(&metadata),
+        vec![("gateway-api".to_owned(), "gateway-core".to_owned())]
+    );
+}
+
+fn workspace_runtime_dependency_edges(metadata: &serde_json::Value) -> Vec<(String, String)> {
     let packages = metadata["packages"]
         .as_array()
         .expect("cargo metadata packages");
@@ -173,31 +289,14 @@ fn workspace_internal_dependency_edges_match_frozen_dag() {
             if !internal_names.contains(dep_name) {
                 continue;
             }
-            let is_runtime_edge = dependency["dep_kinds"]
-                .as_array()
-                .map(|kinds| {
-                    kinds
-                        .iter()
-                        .any(|kind| kind["kind"].as_str() == Some("normal"))
-                })
-                .unwrap_or(true);
-            if is_runtime_edge {
+            if dependency.get("kind").expect("dependency kind").is_null() {
                 actual.push((name.to_owned(), dep_name.to_owned()));
             }
         }
     }
 
-    let mut expected: Vec<(String, String)> = ALLOWED_INTERNAL_EDGES
-        .iter()
-        .map(|(from, to)| ((*from).to_owned(), (*to).to_owned()))
-        .collect();
     actual.sort();
-    expected.sort();
-
-    assert_eq!(
-        actual, expected,
-        "workspace internal dependency edges diverged from the frozen DAG"
-    );
+    actual
 }
 
 #[test]

backend/apps/gateway/tests/bootstrap.rs

@@ -143,10 +143,7 @@ fn config_loader_should_reject_removed_fingerprint_section() {
 
 #[test]
 fn config_loader_should_reject_invalid_codex_cli_version() {
-    assert_rejected(valid_config().replace(
-        "codex_version: '0.151.0-alpha.7.2'",
-        "codex_version: 'latest'",
-    ));
+    assert_rejected(valid_config().replace("codex_version: '0.153.4'", "codex_version: 'latest'"));
 }
 
 #[test]
@@ -165,7 +162,7 @@ fn config_loader_should_reject_zero_server_port() {
 
 #[test]
 fn config_loader_should_reject_invalid_desktop_profile_fields() {
-    assert_rejected(valid_config().replace("desktop_build: '7377'", "desktop_build: 'build'"));
+    assert_rejected(valid_config().replace("desktop_build: '8109'", "desktop_build: 'build'"));
 }
 
 fn assert_rejected(config: String) {

backend/crates/gateway-admin/Cargo.toml

@@ -22,6 +22,7 @@ gateway-core = { path = "../gateway-core" }
 hex = "0.4.3"
 rand_core = { version = "0.6.4", features = ["getrandom"] }
 serde = { version = "1.0.228", features = ["derive"] }
+serde_json = { version = "1.0.150", features = ["arbitrary_precision", "preserve_order"] }
 secrecy = { version = "0.10.3", features = ["serde"] }
 subtle = "2.6.1"
 thiserror = "2.0.18"
@@ -32,7 +33,6 @@ chrono-tz = "0.10"
 tokio = { version = "1.52", features = ["rt", "time", "macros", "sync"] }
 
 [dev-dependencies]
-serde_json = { version = "1.0.150", features = ["arbitrary_precision", "preserve_order"] }
 sha2 = "0.11"
 tempfile = "3"
 tokio = { version = "1.52.3", default-features = false, features = ["macros", "rt"] }

backend/crates/gateway-admin/src/lib.rs

@@ -304,6 +304,7 @@ pub async fn initialize(
         client_distribution: Arc::new(DefaultClientDistributionService::new(client_distribution)),
         observability: Arc::new(DefaultObservabilityService::new(
             store.observability(),
+            store.accounts(),
             store.settings(),
             registry,
         )),

backend/crates/gateway-admin/src/model/accounts.rs

@@ -18,6 +18,15 @@ pub use gateway_core::account::{
     QuotaState, resolve_account_status,
 };
 
+/// 导入时统一应用的账号调度与分组设置；缺省时保留原有导入语义。
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct AccountImportSettings {
+    pub enabled: bool,
+    pub concurrency_limit: Option<AccountConcurrencyLimit>,
+    pub weight: AccountWeight,
+    pub group_ids: Vec<gateway_core::routing::AccountGroupId>,
+}
+
 /// 账号列表排序字段。
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum AccountSortField {
@@ -89,6 +98,7 @@ pub struct AccountRecord {
     pub enabled: bool,
     pub concurrency_limit: Option<AccountConcurrencyLimit>,
     pub weight: AccountWeight,
+    pub outbound_proxy: Option<gateway_core::account::OutboundProxy>,
     pub credential_state: CredentialState,
     pub credential_observed_at: DateTime<Utc>,
     pub quota: QuotaState,
@@ -211,6 +221,7 @@ pub struct UpdateAccount {
     pub concurrency_limit: Option<AccountConcurrencyLimit>,
     pub weight: AccountWeight,
     pub group_ids: Vec<gateway_core::routing::AccountGroupId>,
+    pub outbound_proxy: Option<Option<gateway_core::account::OutboundProxy>>,
 }
 
 /// 账号更新结果。
@@ -228,6 +239,7 @@ pub struct BatchUpdateAccounts {
     pub concurrency_limit: Option<AccountConcurrencyLimit>,
     pub weight: AccountWeight,
     pub group_ids: Vec<gateway_core::routing::AccountGroupId>,
+    pub outbound_proxy: Option<Option<gateway_core::account::OutboundProxy>>,
 }
 
 /// 批量账号更新结果。

backend/crates/gateway-admin/src/model/auth.rs

@@ -4,6 +4,12 @@ use chrono::{DateTime, Utc};
 
 use super::{MutationActor, MutationContext, Revision};
 
+/// 会话审计使用的稳定管理员标识。
+#[must_use]
+pub fn admin_session_actor_ref(admin_user_id: &str) -> String {
+    format!("admin:{admin_user_id}")
+}
+
 /// 已认证的管理主体。
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub enum AdminPrincipal {

backend/crates/gateway-admin/src/model/client_keys.rs

@@ -5,6 +5,7 @@ use std::{fmt, num::NonZeroU16};
 use chrono::{DateTime, Utc};
 
 use gateway_core::{
+    engine::budget::{ClientBudgetLimits, ClientBudgetStatus},
     policy::{ClientApiKeyId, RateLimits},
     routing::{AccountGroupId, ProviderKind},
 };
@@ -93,6 +94,7 @@ pub struct ClientKeyRecord {
     pub prefix: String,
     pub enabled: bool,
     pub limits: RateLimits,
+    pub budget: ClientBudgetStatus,
     pub last_used_at: Option<DateTime<Utc>>,
     pub created_at: DateTime<Utc>,
     pub updated_at: DateTime<Utc>,
@@ -146,6 +148,7 @@ pub struct CreateClientKey {
     pub label: Option<String>,
     pub group_ids: Vec<AccountGroupId>,
     pub limits: RateLimits,
+    pub budget: ClientBudgetLimits,
 }
 
 /// 管理用例生成 ID 与明文后的持久化命令。
@@ -156,6 +159,7 @@ pub struct NewClientKey {
     pub label: Option<String>,
     pub group_ids: Vec<AccountGroupId>,
     pub limits: RateLimits,
+    pub budget: ClientBudgetLimits,
     pub plaintext: String,
 }
 
@@ -179,6 +183,8 @@ pub struct UpdateClientKey {
     pub label: Option<String>,
     pub group_ids: Vec<AccountGroupId>,
     pub limits: RateLimits,
+    pub daily_limit_usd: Option<gateway_core::metering::Decimal>,
+    pub weekly_limit_usd: Option<gateway_core::metering::Decimal>,
 }
 
 /// 修改 Client Key 启用状态。

backend/crates/gateway-admin/src/model/observability.rs

@@ -471,6 +471,8 @@ pub struct DashboardAccountUsage {
     pub name: String,
     pub email: Option<String>,
     pub plan_type: Option<String>,
+    /// Admin 按 Provider 补齐的套餐展示名称。
+    pub plan_type_display: Option<String>,
     pub request_count: u64,
     pub success_count: u64,
     pub input_tokens: Option<u64>,
@@ -491,6 +493,8 @@ pub struct DashboardAccountUsage {
     ///
     /// `None` 表示上游未提供可比较的百分比，不应伪造为零。
     pub quota_used_percent: Option<f64>,
+    /// Provider 返回的代表窗口；缺失时保留未知语义。
+    pub quota_window: Option<super::provider_credentials::ProviderQuotaWindow>,
     pub models: Vec<DashboardAccountModelUsage>,
 }
 
@@ -702,6 +706,8 @@ pub struct UsageAttempt {
 /// 一条请求及其全部尝试。
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct UsageDetail {
+    pub trace: Option<serde_json::Value>,
+    pub related_requests: Vec<serde_json::Value>,
     pub request: UsageRecord,
     pub attempts: Vec<UsageAttempt>,
 }
@@ -783,7 +789,6 @@ pub struct OpsError {
     pub latency_ms: Option<u64>,
     pub message: String,
     pub raw_upstream_error: Option<String>,
-    pub occurrence_count: u32,
     pub client_ip: Option<String>,
     pub user_agent: Option<String>,
     pub reasoning_effort: Option<String>,

backend/crates/gateway-admin/src/model/provider_credentials.rs

@@ -10,11 +10,15 @@ use gateway_core::{
     account::{OpaqueProviderData, ProviderAccountId, ProviderAccountIdentity},
     routing::{ProviderKind, UpstreamModelId},
 };
+use serde::Deserialize;
+use serde_json::{Map, Value};
 use uuid::Uuid;
 
 use super::{
     AdminError, MutationActor, MutationContext, PageSize, Revision,
-    accounts::{AccountRecord, AccountSummary, AccountUsage, CredentialState},
+    accounts::{
+        AccountImportSettings, AccountRecord, AccountSummary, AccountUsage, CredentialState,
+    },
 };
 
 /// Provider-owned JSON；公共层只搬运且 Debug 不输出值。
@@ -104,6 +108,7 @@ pub struct CredentialDetails {
 
 /// Provider 正式文档批量导入命令。
 pub struct ImportCredentials {
+    pub settings: Option<AccountImportSettings>,
     pub context: MutationContext,
     pub document: ProviderDocument,
 }
@@ -142,6 +147,7 @@ impl fmt::Debug for PrepareCredentialImport {
 /// Provider 已验证、可由 Store 原子创建的一份 credential。
 #[derive(Debug, Clone, PartialEq)]
 pub struct PreparedCredentialCreate {
+    pub outbound_proxy: Option<gateway_core::account::OutboundProxy>,
     pub account_id: ProviderAccountId,
     pub provider_kind: ProviderKind,
     pub name: String,
@@ -169,6 +175,7 @@ pub struct PreparedCredentialImport {
 /// Admin 交给 Store 的导入事务命令。
 #[derive(Debug, Clone, PartialEq)]
 pub struct CredentialImportCommit {
+    pub settings: Option<AccountImportSettings>,
     pub prepared: PreparedCredentialImport,
 }
 
@@ -247,6 +254,7 @@ pub struct PendingAuthorizationMutation {
     provider_kind: ProviderKind,
     target: AuthorizationMutationTarget,
     owner_binding: AuthorizationOwnerBinding,
+    outbound_proxy: Option<gateway_core::account::OutboundProxy>,
 }
 
 impl PendingAuthorizationMutation {
@@ -260,6 +268,7 @@ impl PendingAuthorizationMutation {
             provider_kind,
             target,
             owner_binding,
+            outbound_proxy: None,
         }
     }
 
@@ -277,6 +286,130 @@ impl PendingAuthorizationMutation {
     pub const fn owner_binding(&self) -> &AuthorizationOwnerBinding {
         &self.owner_binding
     }
+
+    #[must_use]
+    pub fn with_outbound_proxy(
+        mut self,
+        proxy: Option<gateway_core::account::OutboundProxy>,
+    ) -> Self {
+        self.outbound_proxy = proxy;
+        self
+    }
+
+    pub fn outbound_proxy(&self) -> Option<&gateway_core::account::OutboundProxy> {
+        self.outbound_proxy.as_ref()
+    }
+}
+
+impl PendingAuthorizationMutation {
+    /// 编码 v1 中立事务字段；版本号的位置和 Provider 私有外层文档由 adapter 保持。
+    #[must_use]
+    pub fn to_storage_v1(&self) -> Map<String, Value> {
+        let target = match &self.target {
+            AuthorizationMutationTarget::Create { name } => {
+                serde_json::json!({"kind": "create", "name": name})
+            }
+            AuthorizationMutationTarget::Reauthorize { account_id } => {
+                serde_json::json!({"kind": "reauthorize", "account_id": account_id.to_string()})
+            }
+        };
+        let owner = match self.owner_binding.owner() {
+            AuthorizationOwner::AdminSession { admin_user_id } => {
+                serde_json::json!({"kind": "admin_session", "admin_user_id": admin_user_id})
+            }
+            AuthorizationOwner::AdminApiKey => serde_json::json!({"kind": "admin_api_key"}),
+            AuthorizationOwner::System => serde_json::json!({"kind": "system"}),
+        };
+        let mut document = Map::from_iter([
+            (
+                "provider_kind".to_owned(),
+                Value::String(self.provider_kind.as_str().to_owned()),
+            ),
+            ("target".to_owned(), target),
+            ("owner".to_owned(), owner),
+            (
+                "started_request_id".to_owned(),
+                Value::String(self.owner_binding.started_request_id().to_owned()),
+            ),
+        ]);
+        if let Some(proxy) = &self.outbound_proxy {
+            document.insert(
+                "outbound_proxy_url".to_owned(),
+                Value::String(proxy.expose_url().to_owned()),
+            );
+        }
+        document
+    }
+
+    /// 恢复 adapter 已确认版本为 v1 的中立事务字段。
+    ///
+    /// # Errors
+    ///
+    /// 文档字段、Provider kind 或账号身份非法时返回错误，不携带原始 pending 内容。
+    pub fn from_storage_v1(value: Value) -> Result<Self, AdminError> {
+        let invalid = || AdminError::invalid("invalid pending authorization mutation");
+        let document: StoredAuthorizationMutationV1 =
+            serde_json::from_value(value).map_err(|_| invalid())?;
+        let provider_kind = ProviderKind::new(document.provider_kind).map_err(|_| invalid())?;
+        let target = match document.target {
+            StoredAuthorizationTargetV1::Create { name } => {
+                AuthorizationMutationTarget::Create { name }
+            }
+            StoredAuthorizationTargetV1::Reauthorize { account_id } => {
+                AuthorizationMutationTarget::Reauthorize {
+                    account_id: ProviderAccountId::new(account_id).map_err(|_| invalid())?,
+                }
+            }
+        };
+        let owner = match document.owner {
+            StoredAuthorizationOwnerV1::AdminSession { admin_user_id } => {
+                AuthorizationOwner::AdminSession { admin_user_id }
+            }
+            StoredAuthorizationOwnerV1::AdminApiKey => AuthorizationOwner::AdminApiKey,
+            StoredAuthorizationOwnerV1::System => AuthorizationOwner::System,
+        };
+        let proxy = document
+            .outbound_proxy_url
+            .as_deref()
+            .map(gateway_core::account::OutboundProxy::parse)
+            .transpose()
+            .map_err(|_| invalid())?;
+        Ok(Self::new(
+            provider_kind,
+            target,
+            AuthorizationOwnerBinding {
+                owner,
+                started_request_id: document.started_request_id,
+            },
+        )
+        .with_outbound_proxy(proxy))
+    }
+}
+
+#[derive(Deserialize)]
+#[serde(deny_unknown_fields)]
+struct StoredAuthorizationMutationV1 {
+    provider_kind: String,
+    target: StoredAuthorizationTargetV1,
+    owner: StoredAuthorizationOwnerV1,
+    started_request_id: String,
+    #[serde(default)]
+    outbound_proxy_url: Option<String>,
+}
+
+#[derive(Deserialize)]
+#[serde(tag = "kind", rename_all = "snake_case", deny_unknown_fields)]
+enum StoredAuthorizationTargetV1 {
+    Create { name: String },
+    Reauthorize { account_id: String },
+}
+
+#[derive(Deserialize)]
+#[serde(tag = "kind", rename_all = "snake_case", deny_unknown_fields)]
+enum StoredAuthorizationOwnerV1 {
+    AdminSession { admin_user_id: String },
+    AdminApiKey,
+    System,
 }
 
 /// 启动 Provider OAuth Authorization Code 流程。
@@ -285,6 +418,7 @@ pub struct StartAuthorization {
     pub context: MutationContext,
     pub name: String,
     pub reauthorization: Option<ProviderAccountId>,
+    pub outbound_proxy: Option<gateway_core::account::OutboundProxy>,
 }
 
 /// OAuth 流程启动结果。
@@ -350,6 +484,7 @@ pub enum AuthorizationCredentialCommit {
 /// Admin 交给 Store 的 OAuth 原子事务命令。
 #[derive(Debug, Clone, PartialEq)]
 pub struct AuthorizationCommit {
+    pub settings: Option<AccountImportSettings>,
     pub pending: PendingAuthorizationMutation,
     pub credential: AuthorizationCredentialCommit,
 }
@@ -384,7 +519,10 @@ impl PreparedAuthorizationCommit {
         self
     }
 
-    pub(crate) fn into_commit(self) -> AuthorizationCommitSettlement {
+    pub(crate) fn into_commit(
+        self,
+        settings: Option<AccountImportSettings>,
+    ) -> AuthorizationCommitSettlement {
         let (credential, guard) = match self.credential {
             PreparedAuthorizationCredential::Create(credential) => {
                 (AuthorizationCredentialCommit::Create(credential), None)
@@ -399,6 +537,7 @@ impl PreparedAuthorizationCommit {
         };
         AuthorizationCommitSettlement {
             command: AuthorizationCommit {
+                settings,
                 pending: self.pending,
                 credential,
             },
@@ -412,7 +551,7 @@ impl PreparedAuthorizationCommit {
             credential_guard,
             authorization_guard,
             ..
-        } = self.into_commit();
+        } = self.into_commit(None);
         drop(credential_guard);
         if let Some(guard) = authorization_guard {
             guard.abort().await?;
@@ -424,6 +563,7 @@ impl PreparedAuthorizationCommit {
 /// 完成 Provider OAuth 流程。
 #[derive(Clone, PartialEq, Eq)]
 pub struct CompleteAuthorization {
+    pub settings: Option<AccountImportSettings>,
     pub context: MutationContext,
     pub flow_id: String,
     pub callback_url: String,
@@ -621,6 +761,8 @@ pub struct ProviderQuotaRequest {
 /// Provider 已解析的 quota 结果及其不透明差异字段。
 #[derive(Debug, Clone, PartialEq)]
 pub struct ProviderQuota {
+    /// 上游额度响应明确提供的套餐，可用于补全账号展示。
+    pub plan_type: Option<String>,
     pub observed_at: Option<DateTime<Utc>>,
     pub refresh_token_expires_at: Option<DateTime<Utc>>,
     pub windows: Vec<ProviderQuotaWindow>,
@@ -629,6 +771,14 @@ pub struct ProviderQuota {
     pub provider_data: Option<ProviderDocument>,
 }
 
+/// 空值和 `unknown` 代表未提供套餐；新的套餐标识仍按明确值保留。
+pub(crate) fn explicit_plan_type(value: Option<&str>) -> Option<&str> {
+    value.filter(|value| {
+        let value = value.trim();
+        !value.is_empty() && !value.eq_ignore_ascii_case("unknown")
+    })
+}
+
 /// Provider 官方个人资料中的累计摘要。
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct ProviderProfileStatisticsSummary {
@@ -743,6 +893,13 @@ pub struct ProviderResetCreditResult {
 }
 
 impl ProviderQuota {
+    /// 保留账号已有的套餐子类型，仅在缺失时使用上游额度快照补全。
+    pub(crate) fn fill_missing_plan_type(&self, account_plan_type: &mut Option<String>) {
+        if explicit_plan_type(account_plan_type.as_deref()).is_none() {
+            *account_plan_type = explicit_plan_type(self.plan_type.as_deref()).map(str::to_owned);
+        }
+    }
+
     /// 返回账号展开面板使用的当前额度窗口用量。
     ///
     /// Provider 已提供账号级本地用量时，固定窗口和无固定重置点的滚动窗口
@@ -776,6 +933,20 @@ impl ProviderQuota {
             .map(|(_, used_percent)| used_percent)
     }
 
+    /// 选择 Dashboard 展示的真实窗口；没有百分比时仍保留 Provider 的滚动窗口语义。
+    #[must_use]
+    pub fn representative_window(&self) -> Option<&ProviderQuotaWindow> {
+        self.representative_used_window()
+            .map(|(index, _)| &self.windows[index])
+            .or_else(|| {
+                self.windows
+                    .iter()
+                    .enumerate()
+                    .min_by_key(|(index, window)| (quota_usage_priority(window), *index))
+                    .map(|(_, window)| window)
+            })
+    }
+
     /// 将已确认的账号级额度耗尽事实投影到展示窗口。
     ///
     /// Provider 已指出具体触顶窗口时只归一化这些窗口；否则归一化 Dashboard
@@ -908,6 +1079,8 @@ impl fmt::Debug for ProviderExport {
 #[derive(Debug, Clone, PartialEq)]
 pub struct AccountDirectoryItem {
     pub account: AccountRecord,
+    /// Provider 提供的套餐展示名称；未识别到套餐时为空。
+    pub plan_type_display: Option<String>,
     pub projection: gateway_core::account::AccountStatusProjection,
     pub usage: Option<super::accounts::AccountUsage>,
     pub quota: ProviderQuota,

backend/crates/gateway-admin/src/ports/provider.rs

@@ -18,7 +18,7 @@ use crate::model::provider_credentials::{
     PrepareCredentialRotation, PreparedAuthorizationCommit, PreparedCredentialImport,
     PreparedCredentialRotation, ProviderExport, ProviderExportCredentialInput, ProviderModels,
     ProviderProfileAvatar, ProviderProfileStatistics, ProviderQuota, ProviderQuotaRequest,
-    ProviderResetCreditResult, ProviderResetCredits,
+    ProviderResetCreditResult, ProviderResetCredits, explicit_plan_type,
 };
 
 /// Provider 管理失败的稳定分类。
@@ -40,11 +40,13 @@ pub enum ProviderAdminErrorKind {
 ///
 /// `message` 是 Provider 局部诊断，可能包含原始上游正文；通用管理用例不得自动把它作为公开文案。
 /// 只有明确拥有原始诊断合同的调用方才能读取，`Debug` 始终只记录是否存在。
+/// `public_message` 则是明确标记为可公开的静态提示，不允许携带动态上游材料。
 #[derive(Clone, PartialEq, Eq, thiserror::Error)]
 #[error("provider admin operation failed: {kind:?}")]
 pub struct ProviderAdminError {
     kind: ProviderAdminErrorKind,
     message: Option<String>,
+    public_message: Option<&'static str>,
 }
 
 impl std::fmt::Debug for ProviderAdminError {
@@ -53,6 +55,7 @@ impl std::fmt::Debug for ProviderAdminError {
             .debug_struct("ProviderAdminError")
             .field("kind", &self.kind)
             .field("message", &self.message.as_ref().map(|_| "<redacted>"))
+            .field("public_message", &self.public_message)
             .finish()
     }
 }
@@ -63,6 +66,7 @@ impl ProviderAdminError {
         Self {
             kind,
             message: None,
+            public_message: None,
         }
     }
 
@@ -72,6 +76,18 @@ impl ProviderAdminError {
         self
     }
 
+    /// Provider 明确允许公开的静态提示；不得承载上游响应或凭据材料。
+    #[must_use]
+    pub const fn with_public_message(mut self, message: &'static str) -> Self {
+        self.public_message = Some(message);
+        self
+    }
+
+    #[must_use]
+    pub const fn public_message(&self) -> Option<&'static str> {
+        self.public_message
+    }
+
     #[must_use]
     pub const fn kind(&self) -> ProviderAdminErrorKind {
         self.kind
@@ -91,6 +107,11 @@ impl ProviderAdminError {
 pub trait ProviderAdmin: Send + Sync {
     fn provider_kind(&self) -> &ProviderKind;
 
+    /// 将原始套餐值投影为展示名称；默认保留未知 Provider 的原始名称。
+    fn plan_type_display(&self, plan_type: &str) -> String {
+        plan_type.to_owned()
+    }
+
     /// 账号已经由控制面提交为不可调度状态，释放 Provider 持有的账号级运行时资源。
     ///
     /// 无账号级运行时资源的 Provider 不需要执行额外操作。该通知发生在 Store 事务
@@ -230,6 +251,22 @@ impl ProviderAdminRegistry {
             .ok_or_else(|| ProviderAdminError::new(ProviderAdminErrorKind::Unsupported))
     }
 
+    /// 账号页和 Dashboard 共用的套餐展示投影，不修改持久化的原始套餐值。
+    pub(crate) fn plan_type_display(
+        &self,
+        provider_kind: &str,
+        plan_type: Option<&str>,
+    ) -> Option<String> {
+        let plan_type = explicit_plan_type(plan_type)?.trim();
+        let provider = ProviderKind::new(provider_kind.to_owned())
+            .ok()
+            .and_then(|kind| self.providers.get(&kind));
+        Some(provider.map_or_else(
+            || plan_type.to_owned(),
+            |provider| provider.plan_type_display(plan_type),
+        ))
+    }
+
     /// 返回所有已注册 Provider 的 Dashboard 上游身份画像。
     pub fn dashboard_wire_profiles(&self) -> Vec<DashboardWireProfile> {
         self.providers

backend/crates/gateway-admin/src/ports/store.rs

@@ -6,6 +6,7 @@ use std::sync::Arc;
 
 use async_trait::async_trait;
 use chrono::{DateTime, Utc};
+use futures::stream::BoxStream;
 
 use super::backup::BackupStorePorts;
 use crate::model::{
@@ -289,6 +290,10 @@ pub trait AccountGroupStore: Send + Sync {
     ) -> AdminStoreResult<AccountGroupMutation>;
 }
 
+/// 逐条读取的已计算费用事实；消费结束或丢弃时释放查询资源。
+pub type UsageCalculatedBillingStream<'a> =
+    BoxStream<'a, AdminStoreResult<UsageCalculatedBillingFact>>;
+
 /// 用量、趋势、诊断与运维错误的只读能力。
 #[async_trait]
 pub trait ObservabilityStore: Send + Sync {
@@ -318,12 +323,13 @@ pub trait ObservabilityStore: Send + Sync {
         filter: UsageFilter,
     ) -> AdminStoreResult<Vec<RequestMetricPoint>>;
 
-    /// 返回可由 Provider 重新校验的已计算费用事实，用于恢复标准费用趋势。
-    async fn usage_calculated_billing_facts(
+    /// 流式返回可由 Provider 重新校验的已计算费用事实，不保证顺序。
+    /// 查询及解码错误由流返回；调用方应逐条聚合，避免收集整个区间。
+    fn usage_calculated_billing_facts(
         &self,
         range: TimeRange,
         filter: UsageFilter,
-    ) -> AdminStoreResult<Vec<UsageCalculatedBillingFact>>;
+    ) -> UsageCalculatedBillingStream<'_>;
 
     async fn list_usage_records(&self, query: UsageQuery) -> AdminStoreResult<UsagePage>;
 

backend/crates/gateway-admin/src/use_case/accounts.rs

@@ -269,13 +269,23 @@ impl DefaultAccountsService {
             })
             .await
             .map_err(|error| map_provider_error(error, "provider quota"))?;
+        let mut stored = if refresh_quota {
+            self.load_account(account_id).await?
+        } else {
+            stored
+        };
         self.attach_quota_local_usage(
             std::slice::from_ref(&stored),
             std::slice::from_mut(&mut quota),
         )
         .await?;
         let usage = quota.representative_window_usage().cloned();
+        quota.fill_missing_plan_type(&mut stored.account.plan_type);
         Ok(AccountDirectoryItem {
+            plan_type_display: self.providers.plan_type_display(
+                stored.account.provider_kind.as_str(),
+                stored.account.plan_type.as_deref(),
+            ),
             projection: stored.projection,
             usage,
             account: stored.account,
@@ -361,9 +371,14 @@ impl AccountsService for DefaultAccountsService {
             .items
             .into_iter()
             .zip(quotas)
-            .map(|(item, quota)| {
+            .map(|(mut item, quota)| {
                 let usage = quota.representative_window_usage().cloned();
+                quota.fill_missing_plan_type(&mut item.account.plan_type);
                 AccountDirectoryItem {
+                    plan_type_display: self.providers.plan_type_display(
+                        item.account.provider_kind.as_str(),
+                        item.account.plan_type.as_deref(),
+                    ),
                     usage,
                     account: item.account,
                     projection: item.projection,
@@ -730,6 +745,7 @@ fn map_reset_credits_error_after_refresh(
 /// 账号目录中单个账号 quota 读取失败时使用的空额度投影。
 fn empty_quota() -> ProviderQuota {
     ProviderQuota {
+        plan_type: None,
         observed_at: None,
         refresh_token_expires_at: None,
         windows: Vec::new(),

backend/crates/gateway-admin/src/use_case/auth.rs

@@ -69,7 +69,7 @@ impl DefaultAuthService {
             id: format!("audit_{}", Uuid::now_v7().simple()),
             actor_kind: AuditActorKind::AdminSession,
             actor_admin_user_id: Some(self.default_admin_user_id.clone()),
-            actor_ref: format!("admin:{}", self.default_admin_user_id),
+            actor_ref: crate::model::auth::admin_session_actor_ref(&self.default_admin_user_id),
             request_id: None,
             action: action.to_owned(),
             entity_kind: "admin_session".to_owned(),
@@ -183,7 +183,7 @@ impl AuthService for DefaultAuthService {
         if let Some(session) = session {
             let mut event = self.auth_audit("admin.logout", Utc::now());
             event.actor_admin_user_id = Some(session.admin_user_id.clone());
-            event.actor_ref = format!("admin:{}", session.admin_user_id);
+            event.actor_ref = crate::model::auth::admin_session_actor_ref(&session.admin_user_id);
             event.entity_ref = session.admin_user_id;
             self.store
                 .append_audit_event(event)

backend/crates/gateway-admin/src/use_case/backup.rs

@@ -326,7 +326,9 @@ impl DefaultBackupService {
             crate::model::MutationActor::System => AuditActorKind::System,
         };
         let actor_ref = match &context.actor {
-            crate::model::MutationActor::AdminSession { admin_user_id } => admin_user_id.clone(),
+            crate::model::MutationActor::AdminSession { admin_user_id } => {
+                crate::model::auth::admin_session_actor_ref(admin_user_id)
+            }
             crate::model::MutationActor::AdminApiKey => "admin_api_key".to_owned(),
             crate::model::MutationActor::System => "system".to_owned(),
         };

backend/crates/gateway-admin/src/use_case/client_keys.rs

@@ -99,6 +99,7 @@ impl ClientKeyService for DefaultClientKeyService {
                     label: command.label,
                     group_ids: command.group_ids,
                     limits: command.limits,
+                    budget: command.budget,
                     plaintext: plaintext.clone(),
                 },
                 context,

backend/crates/gateway-admin/src/use_case/mod.rs

@@ -83,7 +83,7 @@ fn map_provider_error(
         AdminErrorKind::Internal => "服务内部错误",
         _ => "Provider 操作失败",
     };
-    AdminError::new(kind, message)
+    AdminError::new(kind, error.public_message().unwrap_or(message))
 }
 
 async fn publish_committed(
@@ -115,9 +115,13 @@ async fn pending_authorization(
     command: &StartAuthorization,
     resource: &'static str,
 ) -> Result<PendingAuthorizationMutation, AdminError> {
+    let mut proxy = command.outbound_proxy.clone();
     let target = match &command.reauthorization {
         Some(account_id) => {
-            required_credential(accounts, provider_kind, account_id, resource).await?;
+            proxy = required_credential(accounts, provider_kind, account_id, resource)
+                .await?
+                .credential
+                .outbound_proxy;
             AuthorizationMutationTarget::Reauthorize {
                 account_id: account_id.clone(),
             }
@@ -132,7 +136,8 @@ async fn pending_authorization(
         crate::model::provider_credentials::AuthorizationOwnerBinding::from_context(
             &command.context,
         ),
-    ))
+    )
+    .with_outbound_proxy(proxy))
 }
 
 fn validate_prepared_import(
@@ -217,14 +222,24 @@ async fn validate_authorization_commit(
 async fn commit_authorization(
     accounts: &dyn AccountStore,
     prepared: PreparedAuthorizationCommit,
+    settings: Option<crate::model::accounts::AccountImportSettings>,
     context: &MutationContext,
     resource: &'static str,
 ) -> Result<CredentialMutationResult, AdminError> {
+    if settings.is_some()
+        && matches!(
+            &prepared.credential,
+            PreparedAuthorizationCredential::Reauthorize(_)
+        )
+    {
+        prepared.abort().await?;
+        return Err(AdminError::invalid("重新授权不能修改账号设置"));
+    }
     let crate::model::provider_credentials::AuthorizationCommitSettlement {
         command,
         credential_guard,
         authorization_guard,
-    } = prepared.into_commit();
+    } = prepared.into_commit(settings);
     match accounts.commit_authorization(command, context).await {
         Ok(result) => {
             if let Some(guard) = credential_guard {

backend/crates/gateway-admin/src/use_case/observability.rs

@@ -9,6 +9,7 @@ use std::{
 
 use async_trait::async_trait;
 use chrono::{DateTime, Duration, Timelike as _, Utc};
+use futures::TryStreamExt;
 use gateway_core::{account::ProviderAccountId, routing::ProviderKind};
 
 use crate::{
@@ -29,7 +30,7 @@ use crate::{
     },
     ports::{
         provider::{ProviderAdminErrorKind, ProviderAdminRegistry},
-        store::{ObservabilityStore, SettingsStore},
+        store::{AccountStore, ObservabilityStore, SettingsStore, UsageCalculatedBillingStream},
     },
 };
 
@@ -126,6 +127,7 @@ pub trait ObservabilityService: Send + Sync {
 
 pub(crate) struct DefaultObservabilityService {
     store: Arc<dyn ObservabilityStore>,
+    accounts: Arc<dyn AccountStore>,
     settings: Arc<dyn SettingsStore>,
     providers: ProviderAdminRegistry,
     dashboard_queries: DashboardQueryCache,
@@ -135,11 +137,13 @@ impl DefaultObservabilityService {
     #[must_use]
     pub(crate) fn new(
         store: Arc<dyn ObservabilityStore>,
+        accounts: Arc<dyn AccountStore>,
         settings: Arc<dyn SettingsStore>,
         providers: ProviderAdminRegistry,
     ) -> Self {
         Self {
             store,
+            accounts,
             settings,
             providers,
             dashboard_queries: DashboardQueryCache::default(),
@@ -160,6 +164,11 @@ impl DefaultObservabilityService {
         self.enrich_list_billing(&mut observation.recent_requests);
         self.enrich_dashboard_quotas(&mut observation.account_usage)
             .await;
+        for account in &mut observation.account_usage {
+            account.plan_type_display = self
+                .providers
+                .plan_type_display(&account.provider_kind, account.plan_type.as_deref());
+        }
         let today_start = china_day_start(observation.range.end);
         let yesterday_start = today_start - Duration::days(1);
         let today =
@@ -301,13 +310,21 @@ impl ObservabilityService for DefaultObservabilityService {
         range: TimeRange,
         filter: UsageFilter,
     ) -> Result<UsageInsights, AdminError> {
-        let (overview, trend, billing_facts) = futures::try_join!(
-            self.store.usage_summary(range, filter.clone()),
-            self.store.usage_trend(range, filter.clone()),
-            self.store.usage_calculated_billing_facts(range, filter),
-        )
-        .map_err(|error| map_store_error(error, "usage insights"))?;
-        let standard_costs = recover_standard_costs(&self.providers, billing_facts)?;
+        let aggregates = async {
+            futures::try_join!(
+                self.store.usage_summary(range, filter.clone()),
+                self.store.usage_trend(range, filter.clone()),
+            )
+            .map_err(|error| map_store_error(error, "usage insights"))
+        };
+        let ((overview, trend), standard_costs) = futures::try_join!(
+            aggregates,
+            recover_standard_costs(
+                &self.providers,
+                self.store
+                    .usage_calculated_billing_facts(range, filter.clone()),
+            ),
+        )?;
         build_usage_insights(overview, trend, standard_costs)
     }
 
@@ -590,12 +607,16 @@ struct UsageCostScenarios {
     no_cache: ScenarioCosts,
 }
 
-fn recover_standard_costs(
+async fn recover_standard_costs(
     providers: &ProviderAdminRegistry,
-    facts: Vec<UsageCalculatedBillingFact>,
+    mut facts: UsageCalculatedBillingStream<'_>,
 ) -> Result<UsageCostScenarios, AdminError> {
     let mut scenarios = UsageCostScenarios::default();
-    for fact in facts {
+    while let Some(fact) = facts
+        .try_next()
+        .await
+        .map_err(|error| map_store_error(error, "usage billing facts"))?
+    {
         let Ok(provider_kind) = ProviderKind::new(fact.provider_kind.clone()) else {
             continue;
         };
@@ -708,8 +729,31 @@ fn usd_cost(costs: &[CurrencyCost]) -> Option<DecimalAmount> {
 
 impl DefaultObservabilityService {
     async fn enrich_dashboard_quotas(&self, accounts: &mut [DashboardAccountUsage]) {
+        if accounts.is_empty() {
+            return;
+        }
+        let now = Utc::now();
+        let ids = accounts
+            .iter()
+            .map(|account| account.account_id.clone())
+            .collect::<Vec<_>>();
+        let mut rolling_usage = self
+            .accounts
+            .load_account_usage(
+                TimeRange {
+                    start: now - Duration::hours(24),
+                    end: now,
+                },
+                &ids,
+            )
+            .await
+            .unwrap_or_default()
+            .into_iter()
+            .map(|usage| (usage.account_id.clone(), usage))
+            .collect::<HashMap<_, _>>();
         let providers = self.providers.clone();
         let quota_reads = accounts.iter().map(|account| {
+            let rolling_usage = rolling_usage.remove(&account.account_id);
             let account_id = ProviderAccountId::new(account.account_id.clone()).ok();
             let provider = ProviderKind::new(account.provider_kind.clone())
                 .ok()
@@ -722,16 +766,20 @@ impl DefaultObservabilityService {
                     .quota(ProviderQuotaRequest {
                         account_id,
                         refresh: false,
-                        rolling_usage: None,
+                        rolling_usage,
                     })
                     .await
                     .ok()
-                    .and_then(|quota| quota.representative_used_percent())
             }
         });
-        let quota_used = futures::future::join_all(quota_reads).await;
-        for (account, used_percent) in accounts.iter_mut().zip(quota_used) {
-            account.quota_used_percent = used_percent;
+        let quotas = futures::future::join_all(quota_reads).await;
+        for (account, quota) in accounts.iter_mut().zip(quotas) {
+            if let Some(mut quota) = quota {
+                quota.fill_missing_plan_type(&mut account.plan_type);
+                quota.apply_limit_reached_display();
+                account.quota_used_percent = quota.representative_used_percent();
+                account.quota_window = quota.representative_window().cloned();
+            }
         }
     }
 

backend/crates/gateway-admin/src/use_case/openai.rs

@@ -142,7 +142,13 @@ impl OpenAiService for DefaultOpenAiService {
         )?;
         let result = self
             .accounts
-            .commit_credential_import(CredentialImportCommit { prepared }, &context)
+            .commit_credential_import(
+                CredentialImportCommit {
+                    prepared,
+                    settings: command.settings,
+                },
+                &context,
+            )
             .await
             .map_err(|error| map_store_error(error, "OpenAI credential import"))?;
         self.provider
@@ -173,9 +179,10 @@ impl OpenAiService for DefaultOpenAiService {
 
     async fn complete_authorization(
         &self,
-        command: CompleteAuthorization,
+        mut command: CompleteAuthorization,
     ) -> Result<CredentialMutationResult, AdminError> {
         let context = command.context.clone();
+        let settings = command.settings.take();
         let prepared = self
             .provider
             .complete_authorization(command)
@@ -191,6 +198,7 @@ impl OpenAiService for DefaultOpenAiService {
         let result = commit_authorization(
             self.accounts.as_ref(),
             prepared,
+            settings,
             &context,
             "OpenAI authorization",
         )

backend/crates/gateway-admin/src/use_case/xai.rs

@@ -95,7 +95,13 @@ impl XaiService for DefaultXaiService {
         )?;
         let result = self
             .accounts
-            .commit_credential_import(CredentialImportCommit { prepared }, &context)
+            .commit_credential_import(
+                CredentialImportCommit {
+                    prepared,
+                    settings: command.settings,
+                },
+                &context,
+            )
             .await
             .map_err(|error| map_store_error(error, "xAI credential import"))?;
         publish_committed(self.snapshot.as_ref(), result.config_revision).await?;
@@ -132,9 +138,10 @@ impl XaiService for DefaultXaiService {
 
     async fn complete_authorization(
         &self,
-        command: CompleteAuthorization,
+        mut command: CompleteAuthorization,
     ) -> Result<CredentialMutationResult, AdminError> {
         let context = command.context.clone();
+        let settings = command.settings.take();
         let prepared = self
             .provider
             .complete_authorization(command)
@@ -150,6 +157,7 @@ impl XaiService for DefaultXaiService {
         let result = commit_authorization(
             self.accounts.as_ref(),
             prepared,
+            settings,
             &context,
             "xAI authorization",
         )

backend/crates/gateway-admin/tests/main.rs

@@ -121,6 +121,7 @@ fn provider_document_debug_should_not_expose_opaque_material() {
 #[test]
 fn representative_quota_should_prefer_short_window_and_highest_usage() {
     let quota = ProviderQuota {
+        plan_type: None,
         observed_at: None,
         refresh_token_expires_at: None,
         windows: vec![
@@ -141,6 +142,7 @@ fn representative_quota_should_prefer_account_wide_window_over_model_specific_wi
     let mut model_specific = quota_window("shortTerm", Some(18_000), Some(64.0));
     model_specific.local_usage_attribution = QuotaLocalUsageAttribution::Unavailable;
     let quota = ProviderQuota {
+        plan_type: None,
         observed_at: None,
         refresh_token_expires_at: None,
         windows: vec![
@@ -177,6 +179,7 @@ fn representative_window_usage_should_accept_account_wide_rolling_window_without
         models: Vec::new(),
     };
     let quota = ProviderQuota {
+        plan_type: None,
         observed_at: None,
         refresh_token_expires_at: None,
         windows: vec![ProviderQuotaWindow {
@@ -204,6 +207,7 @@ fn representative_window_usage_should_accept_account_wide_rolling_window_without
 #[test]
 fn exhausted_quota_should_project_full_usage_to_only_the_representative_window() {
     let mut quota = ProviderQuota {
+        plan_type: None,
         observed_at: None,
         refresh_token_expires_at: None,
         windows: vec![
@@ -231,6 +235,7 @@ fn exhausted_quota_should_preserve_the_provider_identified_reached_window() {
     let mut reached = quota_window("monthly", Some(2_592_000), Some(98.0));
     reached.limit_reached = true;
     let mut quota = ProviderQuota {
+        plan_type: None,
         observed_at: None,
         refresh_token_expires_at: None,
         windows: vec![reached, quota_window("shortTerm", Some(18_000), Some(95.0))],

backend/crates/gateway-admin/tests/model/mod.rs

@@ -1,3 +1,4 @@
 //! 模型模块测试：镜像 src/model/ 中带逻辑的模块。
 
 mod backup;
+mod provider_credentials;

backend/crates/gateway-admin/tests/model/provider_credentials.rs

@@ -0,0 +1,135 @@
+use gateway_admin::model::provider_credentials::{
+    AuthorizationMutationTarget, AuthorizationOwnerBinding, PendingAuthorizationMutation,
+    ProviderQuota, ProviderQuotaWindow, ProviderQuotaWindowRole, QuotaLocalUsageAttribution,
+};
+use gateway_admin::model::{MutationActor, MutationContext};
+use gateway_core::account::ProviderAccountId;
+use gateway_core::routing::ProviderKind;
+use serde_json::{Value, json};
+
+#[test]
+fn dashboard_quota_should_preserve_unknown_and_actual_window_facts() {
+    let mut quota = ProviderQuota {
+        plan_type: None,
+        observed_at: None,
+        refresh_token_expires_at: None,
+        windows: Vec::new(),
+        limit_reached: false,
+        provider_data: None,
+    };
+    assert!(quota.representative_window().is_none());
+    assert!(quota.representative_used_percent().is_none());
+
+    let rolling = ProviderQuotaWindow {
+        key: "provider_rolling".to_owned(),
+        group: "requests".to_owned(),
+        label: "Provider rolling window".to_owned(),
+        limit_id: None,
+        limit_name: None,
+        role: Some(ProviderQuotaWindowRole::Primary),
+        local_usage_attribution: QuotaLocalUsageAttribution::AccountWide,
+        window_seconds: Some(86_400),
+        used_percent: None,
+        reset_at: None,
+        limit_reached: false,
+        local_usage: None,
+        provider_data: None,
+    };
+    quota.windows.push(rolling.clone());
+    assert_eq!(quota.representative_window(), Some(&rolling));
+    assert!(quota.representative_used_percent().is_none());
+
+    quota.windows[0].used_percent = Some(99.6);
+    quota.apply_limit_reached_display();
+    let actual = quota.representative_window().expect("actual window");
+    assert_eq!(actual.used_percent, Some(99.6));
+    assert!(
+        !actual.limit_reached,
+        "display rounding cannot exhaust quota"
+    );
+    assert_eq!(actual.window_seconds, Some(86_400));
+    assert_eq!(actual.reset_at, None);
+
+    quota.windows.insert(
+        0,
+        ProviderQuotaWindow {
+            key: "model_specific".to_owned(),
+            used_percent: Some(100.0),
+            local_usage_attribution: QuotaLocalUsageAttribution::Unavailable,
+            ..rolling
+        },
+    );
+    assert_eq!(
+        quota
+            .representative_window()
+            .map(|window| window.key.as_str()),
+        Some("provider_rolling")
+    );
+}
+
+#[test]
+fn pending_mutation_v1_should_round_trip_all_targets_and_owners() {
+    for provider in ["openai", "xai"] {
+        for target in [
+            AuthorizationMutationTarget::Create {
+                name: "account".to_owned(),
+            },
+            AuthorizationMutationTarget::Reauthorize {
+                account_id: ProviderAccountId::new("acct_1").expect("account id"),
+            },
+        ] {
+            for actor in [
+                MutationActor::AdminSession {
+                    admin_user_id: "admin-1".to_owned(),
+                },
+                MutationActor::AdminApiKey,
+                MutationActor::System,
+            ] {
+                let expected = PendingAuthorizationMutation::new(
+                    ProviderKind::new(provider).expect("provider"),
+                    target.clone(),
+                    AuthorizationOwnerBinding::from_context(&MutationContext {
+                        actor,
+                        request_id: "request-1".to_owned(),
+                    }),
+                );
+                assert_eq!(
+                    PendingAuthorizationMutation::from_storage_v1(Value::Object(
+                        expected.to_storage_v1()
+                    )),
+                    Ok(expected),
+                );
+            }
+        }
+    }
+}
+
+#[test]
+fn pending_mutation_v1_should_keep_existing_storage_fields_and_reject_invalid_documents() {
+    let legacy = json!({
+        "provider_kind": "openai",
+        "target": { "kind": "reauthorize", "account_id": "acct_1" },
+        "owner": { "kind": "admin_session", "admin_user_id": "admin-1" },
+        "started_request_id": "request-1"
+    });
+    let restored =
+        PendingAuthorizationMutation::from_storage_v1(legacy.clone()).expect("v1 document");
+    assert_eq!(Value::Object(restored.to_storage_v1()), legacy);
+    for (pointer, invalid) in [
+        ("/provider_kind", json!("")),
+        ("/target/account_id", json!("")),
+        ("/target/kind", json!("other")),
+        ("/owner/kind", json!("other")),
+        ("/started_request_id", json!(null)),
+    ] {
+        let mut document = legacy.clone();
+        *document.pointer_mut(pointer).expect("field") = invalid;
+        assert!(
+            PendingAuthorizationMutation::from_storage_v1(document).is_err(),
+            "{pointer}"
+        );
+    }
+    let mut document = legacy;
+    document["schema_version"] = json!(2);
+    assert!(PendingAuthorizationMutation::from_storage_v1(document).is_err());
+}

backend/crates/gateway-admin/tests/use_case/accounts.rs

@@ -72,6 +72,7 @@ pub(super) struct FakeProviderAdmin {
     import_account_ids: Mutex<Vec<String>>,
     quota_requests: Mutex<Vec<ProviderQuotaRequest>>,
     quota: Mutex<ProviderQuota>,
+    quota_refresh_account: Mutex<Option<(Arc<FakeAccountStore>, AccountRecord)>>,
     current_credential_revision: Mutex<Revision>,
     reset_credit_commands: Mutex<Vec<ConsumeProviderResetCredit>>,
 }
@@ -89,6 +90,7 @@ impl FakeProviderAdmin {
             import_account_ids: Mutex::new(vec!["acct_prepared".to_owned()]),
             quota_requests: Mutex::new(Vec::new()),
             quota: Mutex::new(empty_quota()),
+            quota_refresh_account: Mutex::new(None),
             current_credential_revision: Mutex::new(revision(1)),
             reset_credit_commands: Mutex::new(Vec::new()),
         })
@@ -103,6 +105,18 @@ impl FakeProviderAdmin {
             Some(ProviderAdminError::new(kind).with_message(message));
     }
 
+    pub(super) fn fail_next_with_public_message(
+        &self,
+        kind: ProviderAdminErrorKind,
+        message: &'static str,
+    ) {
+        *self.failure.lock().expect("provider failure") = Some(
+            ProviderAdminError::new(kind)
+                .with_message("upstream body containing a secret token")
+                .with_public_message(message),
+        );
+    }
+
     pub(super) fn fail_next_quota(&self, kind: ProviderAdminErrorKind) {
         *self.quota_failure.lock().expect("provider quota failure") = Some(kind);
     }
@@ -199,6 +213,10 @@ impl ProviderAdmin for FakeProviderAdmin {
         &self.kind
     }
 
+    fn plan_type_display(&self, plan_type: &str) -> String {
+        format!("{} display: {plan_type}", self.kind)
+    }
+
     async fn account_unavailable(&self, _: &ProviderAccountId) {
         self.record("provider.account_unavailable");
     }
@@ -346,6 +364,14 @@ impl ProviderAdmin for FakeProviderAdmin {
     ) -> Result<ProviderQuota, ProviderAdminError> {
         if request.refresh {
             self.record("provider.quota");
+            if let Some((store, account)) = self
+                .quota_refresh_account
+                .lock()
+                .expect("quota refresh account")
+                .take()
+            {
+                store.set_accounts(vec![account]);
+            }
         }
         self.quota_requests
             .lock()
@@ -415,6 +441,7 @@ pub(super) struct FakeAccountStore {
     account_after_probe: Mutex<Option<AccountRecord>>,
     fail_commit: Mutex<bool>,
     audit_requests: Mutex<Vec<String>>,
+    import_settings: Mutex<Vec<Option<gateway_admin::model::accounts::AccountImportSettings>>>,
     quota_window_usage: Mutex<Vec<AccountUsageWindowResult>>,
     quota_window_queries: Mutex<Vec<AccountUsageWindowQuery>>,
 }
@@ -431,6 +458,7 @@ impl FakeAccountStore {
             account_after_probe: Mutex::new(None),
             fail_commit: Mutex::new(false),
             audit_requests: Mutex::new(Vec::new()),
+            import_settings: Mutex::new(Vec::new()),
             quota_window_usage: Mutex::new(Vec::new()),
             quota_window_queries: Mutex::new(Vec::new()),
         })
@@ -440,6 +468,15 @@ impl FakeAccountStore {
         *self.fail_commit.lock().expect("store failure") = true;
     }
 
+    pub(super) fn import_settings(
+        &self,
+    ) -> Vec<Option<gateway_admin::model::accounts::AccountImportSettings>> {
+        self.import_settings
+            .lock()
+            .expect("import settings")
+            .clone()
+    }
+
     pub(super) fn audit_requests(&self) -> Vec<String> {
         self.audit_requests.lock().expect("audit requests").clone()
     }
@@ -646,6 +683,10 @@ impl AccountStore for FakeAccountStore {
         command: CredentialImportCommit,
         context: &MutationContext,
     ) -> AdminStoreResult<CredentialImportResult> {
+        self.import_settings
+            .lock()
+            .expect("import settings")
+            .push(command.settings);
         self.record("store.commit_import");
         self.record_context(context);
         self.require_commit()?;
@@ -665,6 +706,10 @@ impl AccountStore for FakeAccountStore {
         command: AuthorizationCommit,
         context: &MutationContext,
     ) -> AdminStoreResult<CredentialMutationResult> {
+        self.import_settings
+            .lock()
+            .expect("import settings")
+            .push(command.settings);
         self.record("store.commit_authorization");
         self.record_context(context);
         self.require_commit()?;
@@ -1098,6 +1143,47 @@ async fn accounts_refresh_should_keep_guard_through_store_commit() {
     assert_eq!(store.audit_requests(), ["refresh-request"]);
 }
 
+#[tokio::test]
+async fn accounts_quota_refresh_should_return_the_updated_account_status() {
+    let events = events();
+    let provider = FakeProviderAdmin::new("openai", events.clone());
+    let mut account = account_record("openai");
+    account.quota = QuotaState::exhausted(
+        QuotaEvidence::UsageLimitReached,
+        std::time::SystemTime::now(),
+        None,
+    );
+    let store = FakeAccountStore::with_account(account.clone(), events.clone());
+    account.quota = QuotaState::allowed(std::time::SystemTime::now());
+    *provider
+        .quota_refresh_account
+        .lock()
+        .expect("quota refresh account") = Some((store.clone(), account));
+
+    let result = accounts_service(provider, store)
+        .await
+        .accounts()
+        .quota(
+            &ProviderAccountId::new("acct_test").expect("account ID"),
+            true,
+        )
+        .await
+        .expect("refresh quota");
+
+    assert_eq!(
+        result.account.quota.access(),
+        gateway_core::account::QuotaAccessState::Allowed
+    );
+    assert_eq!(
+        result.projection.status,
+        gateway_admin::model::accounts::AccountStatus::Normal
+    );
+    assert_eq!(
+        recorded(&events),
+        ["store.load_account", "provider.quota", "store.load_account"]
+    );
+}
+
 #[tokio::test]
 async fn accounts_recover_should_commit_facts_then_return_normal_account() {
     let events = events();
@@ -1162,6 +1248,7 @@ async fn accounts_update_should_commit_then_release_disabled_account_and_publish
         .update(
             &context("update-request"),
             UpdateAccount {
+                outbound_proxy: None,
                 account_id: "acct_test".to_owned(),
                 enabled: false,
                 concurrency_limit: None,
@@ -1198,6 +1285,7 @@ async fn accounts_update_should_not_notify_provider_when_store_commit_fails() {
         .update(
             &context("update-failure"),
             UpdateAccount {
+                outbound_proxy: None,
                 account_id: "acct_test".to_owned(),
                 enabled: false,
                 concurrency_limit: None,
@@ -1239,6 +1327,7 @@ async fn accounts_batch_update_should_commit_once_and_notify_each_provider() {
         .batch_update(
             &context("batch-update-request"),
             BatchUpdateAccounts {
+                outbound_proxy: None,
                 account_ids: vec!["acct_openai".to_owned(), "acct_xai".to_owned()],
                 enabled: false,
                 concurrency_limit: None,
@@ -1269,9 +1358,11 @@ async fn accounts_batch_update_should_commit_once_and_notify_each_provider() {
 #[tokio::test]
 async fn accounts_list_should_return_complete_directory_semantics() {
     let provider = FakeProviderAdmin::new("openai", events());
-    let store = FakeAccountStore::new("openai", events());
-    let page = accounts_service(provider, store)
-        .await
+    let mut stored = account_record("openai");
+    stored.plan_type = Some("  self_serve_business_prolite  ".to_owned());
+    let store = FakeAccountStore::with_account(stored, events());
+    let services = accounts_service(provider, store).await;
+    let page = services
         .accounts()
         .list(AccountListQuery {
             page: 1,
@@ -1293,6 +1384,83 @@ async fn accounts_list_should_return_complete_directory_semantics() {
         account.projection.status,
         gateway_admin::model::accounts::AccountStatus::Normal
     );
+    assert_eq!(
+        (
+            account.account.plan_type.as_deref(),
+            account.plan_type_display.as_deref(),
+        ),
+        (
+            Some("  self_serve_business_prolite  "),
+            Some("openai display: self_serve_business_prolite"),
+        )
+    );
+
+    let detail = services
+        .accounts()
+        .quota(
+            &ProviderAccountId::new("acct_test").expect("account ID"),
+            false,
+        )
+        .await
+        .expect("account detail");
+    assert_eq!(detail.plan_type_display, account.plan_type_display);
+    assert_eq!(detail.account.plan_type, account.account.plan_type);
+}
+
+#[tokio::test]
+async fn accounts_should_fill_missing_plan_from_quota_without_overriding_known_subtypes() {
+    for (stored_plan, quota_plan, expected) in [
+        (None, Some("free"), Some("free")),
+        (Some("  "), Some("free"), Some("free")),
+        (Some("unknown"), Some("free"), Some("free")),
+        (
+            Some("self_serve_business_prolite"),
+            Some("team"),
+            Some("self_serve_business_prolite"),
+        ),
+        (None, None, None),
+    ] {
+        let provider = FakeProviderAdmin::new("openai", events());
+        provider.set_quota(ProviderQuota {
+            plan_type: quota_plan.map(str::to_owned),
+            ..empty_quota()
+        });
+        let mut stored = account_record("openai");
+        stored.plan_type = stored_plan.map(str::to_owned);
+        let store = FakeAccountStore::with_account(stored, events());
+        let services = accounts_service(provider, store).await;
+        let page = services
+            .accounts()
+            .list(AccountListQuery {
+                page: 1,
+                page_size: gateway_admin::model::PageSize::new(20).expect("page size"),
+                provider_kind: None,
+                group_filter: None,
+                search: None,
+                status: None,
+                sort: None,
+            })
+            .await
+            .expect("account list");
+        let account = page.items.first().expect("account item");
+        assert_eq!(account.account.plan_type.as_deref(), expected);
+        assert_eq!(
+            account.plan_type_display,
+            expected.map(|plan| format!("openai display: {plan}"))
+        );
+        for refresh in [false, true] {
+            let detail = services
+                .accounts()
+                .quota(
+                    &ProviderAccountId::new("acct_test").expect("account ID"),
+                    refresh,
+                )
+                .await
+                .expect("account quota detail");
+            assert_eq!(detail.account.plan_type.as_deref(), expected);
+            assert_eq!(detail.plan_type_display, account.plan_type_display);
+        }
+    }
 }
 
 #[tokio::test]
@@ -1300,6 +1468,7 @@ async fn accounts_list_should_degrade_quota_failure_to_empty_window_without_drop
     let events = events();
     let openai = FakeProviderAdmin::new("openai", events.clone());
     openai.set_quota(ProviderQuota {
+        plan_type: None,
         observed_at: Some(Utc::now()),
         refresh_token_expires_at: None,
         windows: vec![ProviderQuotaWindow {
@@ -1431,6 +1600,7 @@ async fn accounts_list_should_map_unknown_credential_to_error_not_normal() {
 async fn accounts_list_should_not_derive_rate_limited_from_provider_quota_view() {
     let provider = FakeProviderAdmin::new("openai", events());
     provider.set_quota(ProviderQuota {
+        plan_type: None,
         observed_at: Some(Utc::now()),
         refresh_token_expires_at: None,
         windows: vec![ProviderQuotaWindow {
@@ -1478,6 +1648,7 @@ async fn accounts_list_should_not_derive_rate_limited_from_provider_quota_view()
 async fn accounts_list_should_not_derive_exhaustion_from_provider_quota_view() {
     let provider = FakeProviderAdmin::new("openai", events());
     provider.set_quota(ProviderQuota {
+        plan_type: None,
         observed_at: Some(Utc::now()),
         refresh_token_expires_at: None,
         windows: vec![ProviderQuotaWindow {
@@ -1526,6 +1697,7 @@ async fn accounts_list_should_attach_local_usage_to_quota_windows() {
     let provider = FakeProviderAdmin::new("openai", events());
     let reset_at = Utc::now() + TimeDelta::hours(1);
     provider.set_quota(ProviderQuota {
+        plan_type: None,
         observed_at: Some(Utc::now()),
         refresh_token_expires_at: None,
         windows: vec![ProviderQuotaWindow {
@@ -1592,6 +1764,7 @@ async fn accounts_list_should_not_attach_account_usage_to_model_specific_quota_w
     let provider = FakeProviderAdmin::new("openai", events());
     let reset_at = Utc::now() + TimeDelta::days(7);
     provider.set_quota(ProviderQuota {
+        plan_type: None,
         observed_at: Some(Utc::now()),
         refresh_token_expires_at: None,
         windows: vec![
@@ -1846,6 +2019,7 @@ pub(super) fn document() -> ProviderDocument {
 
 fn empty_quota() -> ProviderQuota {
     ProviderQuota {
+        plan_type: None,
         observed_at: None,
         refresh_token_expires_at: None,
         windows: Vec::new(),
@@ -1880,6 +2054,7 @@ fn quota_local_usage(account_id: &str, total_tokens: u64) -> AccountUsage {
 pub(super) fn account_record(kind: &str) -> AccountRecord {
     let now = Utc::now();
     AccountRecord {
+        outbound_proxy: None,
         id: "acct_test".to_owned(),
         provider_kind: ProviderKind::new(kind).expect("provider kind"),
         groups: Vec::new(),
@@ -1921,6 +2096,7 @@ fn prepared_create_with_id(
 ) -> PreparedCredentialCreate {
     let now = Utc::now();
     PreparedCredentialCreate {
+        outbound_proxy: None,
         account_id: ProviderAccountId::new(account_id).expect("prepared account ID"),
         provider_kind,
         name: name.to_owned(),
@@ -2047,3 +2223,17 @@ fn store_unavailable() -> AdminStoreError {
 fn unsupported() -> ProviderAdminError {
     ProviderAdminError::new(ProviderAdminErrorKind::Unsupported)
 }
+
+pub(super) fn import_settings() -> gateway_admin::model::accounts::AccountImportSettings {
+    gateway_admin::model::accounts::AccountImportSettings {
+        enabled: false,
+        concurrency_limit: Some(
+            gateway_core::account::AccountConcurrencyLimit::new(3).expect("concurrency"),
+        ),
+        weight: gateway_core::account::AccountWeight::new(7).expect("weight"),
+        group_ids: vec![
+            gateway_core::routing::AccountGroupId::new("grp_00000000000000000000000000000091")
+                .expect("group ID"),
+        ],
+    }
+}

backend/crates/gateway-admin/tests/use_case/mod.rs

@@ -536,13 +536,14 @@ impl ObservabilityStore for UnavailableStore {
         Err(unavailable("usage trend"))
     }
 
-    async fn usage_calculated_billing_facts(
+    fn usage_calculated_billing_facts(
         &self,
         _: TimeRange,
         _: UsageFilter,
-    ) -> AdminStoreResult<Vec<gateway_admin::model::observability::UsageCalculatedBillingFact>>
-    {
-        Err(unavailable("usage billing facts"))
+    ) -> gateway_admin::ports::store::UsageCalculatedBillingStream<'_> {
+        Box::pin(futures::stream::once(async {
+            Err(unavailable("usage billing facts"))
+        }))
     }
 
     async fn list_usage_records(&self, _: UsageQuery) -> AdminStoreResult<UsagePage> {

backend/crates/gateway-admin/tests/use_case/observability.rs

@@ -2,7 +2,7 @@ use std::{
     str::FromStr as _,
     sync::{
         Arc, Mutex,
-        atomic::{AtomicUsize, Ordering},
+        atomic::{AtomicBool, AtomicUsize, Ordering},
     },
     time::Duration as StdDuration,
 };
@@ -537,10 +537,41 @@ async fn usage_records_should_enrich_provider_reported_totals_when_pricing_match
     ));
 }
 
+#[tokio::test]
+async fn usage_insights_should_reject_partial_costs_when_billing_stream_fails() {
+    let now = Utc::now();
+    let range = observation_range(now);
+    let store = Arc::new(FixtureObservabilityStore::new(range));
+    store.replace_calculated_billing_facts(vec![UsageCalculatedBillingFact {
+        bucket_start: quarter_hour_start(now),
+        provider_kind: "openai".to_owned(),
+        upstream_model_id: "gpt-5.5".to_owned(),
+        service_tier: None,
+        input_tokens: Some(800),
+        output_tokens: Some(200),
+        cached_tokens: Some(0),
+        cache_write_tokens: Some(0),
+        total: CurrencyCost {
+            currency: "USD".to_owned(),
+            amount: "1.25".parse().expect("cost"),
+        },
+    }]);
+    store.billing_stream_fails.store(true, Ordering::SeqCst);
+    let services = observability_services_with_calculated_billing(store).await;
+    assert!(
+        services
+            .observability()
+            .usage_insights(range, UsageFilter::default())
+            .await
+            .is_err()
+    );
+}
+
 struct FixtureObservabilityStore {
     trend: Mutex<Vec<RequestMetricPoint>>,
     overview: Mutex<UsageOverview>,
     calculated_billing_facts: Mutex<Vec<UsageCalculatedBillingFact>>,
+    billing_stream_fails: AtomicBool,
     diagnostics: Mutex<Vec<DiagnosticObservation>>,
     runtime_slots: Mutex<Option<DashboardRuntimeSlots>>,
     summary_observed_at: Mutex<Option<DateTime<Utc>>>,
@@ -561,6 +592,7 @@ impl FixtureObservabilityStore {
                 providers: Vec::new(),
             }),
             calculated_billing_facts: Mutex::new(Vec::new()),
+            billing_stream_fails: AtomicBool::new(false),
             diagnostics: Mutex::new(Vec::new()),
             runtime_slots: Mutex::new(None),
             summary_observed_at: Mutex::new(None),
@@ -663,16 +695,23 @@ impl ObservabilityStore for FixtureObservabilityStore {
         Ok(self.trend.lock().expect("trend").clone())
     }
 
-    async fn usage_calculated_billing_facts(
+    fn usage_calculated_billing_facts(
         &self,
         _: TimeRange,
         _: UsageFilter,
-    ) -> AdminStoreResult<Vec<UsageCalculatedBillingFact>> {
-        Ok(self
+    ) -> gateway_admin::ports::store::UsageCalculatedBillingStream<'_> {
+        let facts = self
             .calculated_billing_facts
             .lock()
             .expect("calculated billing facts")
-            .clone())
+            .clone();
+        let error = self
+            .billing_stream_fails
+            .load(Ordering::SeqCst)
+            .then(|| Err(super::unavailable("billing stream failed")));
+        Box::pin(futures::stream::iter(
+            facts.into_iter().map(Ok).chain(error),
+        ))
     }
 
     async fn list_usage_records(&self, query: UsageQuery) -> AdminStoreResult<UsagePage> {

backend/crates/gateway-admin/tests/use_case/openai.rs

@@ -50,6 +50,7 @@ async fn openai_import_should_prepare_before_atomic_store_commit() {
     services
         .openai()
         .import_document(ImportCredentials {
+            settings: Some(super::accounts::import_settings()),
             context: context("import-openai"),
             document: document(),
         })
@@ -75,9 +76,51 @@ async fn openai_import_should_prepare_before_atomic_store_commit() {
             rolling_usage: None,
         }]
     );
+    assert_eq!(
+        store.import_settings(),
+        [Some(super::accounts::import_settings())]
+    );
     assert_eq!(store.audit_requests(), ["import-openai"]);
 }
 
+#[tokio::test]
+async fn openai_import_should_expose_only_explicit_public_errors_without_committing() {
+    use gateway_admin::model::AdminErrorKind;
+
+    for (provider_kind, admin_kind) in [
+        (ProviderAdminErrorKind::Invalid, AdminErrorKind::Invalid),
+        (
+            ProviderAdminErrorKind::Unavailable,
+            AdminErrorKind::Unavailable,
+        ),
+        (
+            ProviderAdminErrorKind::BadGateway,
+            AdminErrorKind::BadGateway,
+        ),
+    ] {
+        let events = events();
+        let provider = FakeProviderAdmin::new("openai", events.clone());
+        provider
+            .fail_next_with_public_message(provider_kind, "Codex PAT 验证失败，请检查令牌后重试");
+        let store = FakeAccountStore::new("openai", events.clone());
+        let services = service(provider, store.clone()).await;
+        let error = services
+            .openai()
+            .import_document(ImportCredentials {
+                settings: None,
+                context: context("import-openai-pat-failure"),
+                document: document(),
+            })
+            .await
+            .expect_err("validation must fail before committing accounts");
+        assert_eq!(error.kind(), admin_kind);
+        assert_eq!(error.to_string(), "Codex PAT 验证失败，请检查令牌后重试");
+        assert!(!format!("{error:?}").contains("secret token"));
+        assert_eq!(recorded(&events), ["provider.prepare_import"]);
+        assert!(store.audit_requests().is_empty());
+    }
+}
+
 #[tokio::test]
 async fn openai_import_should_refresh_quota_for_every_imported_account() {
     let events = events();
@@ -89,6 +132,7 @@ async fn openai_import_should_refresh_quota_for_every_imported_account() {
     let result = services
         .openai()
         .import_document(ImportCredentials {
+            settings: None,
             context: context("import-openai-batch"),
             document: document(),
         })
@@ -132,6 +176,7 @@ async fn openai_import_should_remain_successful_when_quota_refresh_fails() {
     let result = services
         .openai()
         .import_document(ImportCredentials {
+            settings: None,
             context: context("import-openai-quota-failure"),
             document: document(),
         })
@@ -157,6 +202,7 @@ async fn openai_authorization_create_should_observe_initial_quota() {
     services
         .openai()
         .start_authorization(StartAuthorization {
+            outbound_proxy: None,
             context: context("oauth-start-openai-create"),
             name: "new OpenAI credential".to_owned(),
             reauthorization: None,
@@ -166,6 +212,7 @@ async fn openai_authorization_create_should_observe_initial_quota() {
     services
         .openai()
         .complete_authorization(CompleteAuthorization {
+            settings: Some(super::accounts::import_settings()),
             context: context("oauth-start-openai-create"),
             flow_id: "flow-test".to_owned(),
             callback_url: "http://localhost/callback?code=test&state=test".to_owned(),
@@ -193,6 +240,10 @@ async fn openai_authorization_create_should_observe_initial_quota() {
             rolling_usage: None,
         }]
     );
+    assert_eq!(
+        store.import_settings(),
+        [Some(super::accounts::import_settings())]
+    );
     assert_eq!(store.audit_requests(), ["oauth-start-openai-create"]);
 }
 
@@ -207,6 +258,7 @@ async fn openai_authorization_create_should_remain_successful_when_initial_quota
     services
         .openai()
         .start_authorization(StartAuthorization {
+            outbound_proxy: None,
             context: context("oauth-start-openai-quota-failure"),
             name: "new OpenAI credential".to_owned(),
             reauthorization: None,
@@ -216,6 +268,7 @@ async fn openai_authorization_create_should_remain_successful_when_initial_quota
     let result = services
         .openai()
         .complete_authorization(CompleteAuthorization {
+            settings: None,
             context: context("oauth-start-openai-quota-failure"),
             flow_id: "flow-test".to_owned(),
             callback_url: "http://localhost/callback?code=test&state=test".to_owned(),
@@ -238,6 +291,7 @@ async fn openai_authorization_store_failure_should_release_claim_for_retry() {
     store.fail_next_commit();
     let services = service(provider.clone(), store).await;
     let command = || CompleteAuthorization {
+        settings: None,
         context: context("oauth-store-retry"),
         flow_id: "flow-test".to_owned(),
         callback_url: "http://localhost/callback?code=test&state=test".to_owned(),
@@ -246,6 +300,7 @@ async fn openai_authorization_store_failure_should_release_claim_for_retry() {
     services
         .openai()
         .start_authorization(StartAuthorization {
+            outbound_proxy: None,
             context: context("oauth-store-retry"),
             name: "new OpenAI credential".to_owned(),
             reauthorization: None,
@@ -293,6 +348,7 @@ async fn openai_import_provider_error_should_not_touch_store_transaction() {
     services
         .openai()
         .import_document(ImportCredentials {
+            settings: None,
             context: context("import-openai-error"),
             document: document(),
         })
@@ -311,6 +367,7 @@ async fn openai_reauthorization_should_commit_after_credential_revision_advances
     services
         .openai()
         .start_authorization(StartAuthorization {
+            outbound_proxy: None,
             context: context("oauth-start-openai"),
             name: "reauthorize".to_owned(),
             reauthorization: Some(ProviderAccountId::new("acct_test").expect("account ID")),
@@ -336,6 +393,7 @@ async fn openai_reauthorization_should_commit_after_credential_revision_advances
     let result = services
         .openai()
         .complete_authorization(CompleteAuthorization {
+            settings: None,
             context: context("oauth-complete-openai"),
             flow_id: "flow-test".to_owned(),
             callback_url: "http://localhost/callback?code=test&state=test".to_owned(),
@@ -387,3 +445,34 @@ fn deletion(account_id: &str) -> CredentialDeletion {
         account_ids: vec![ProviderAccountId::new(account_id).expect("account ID")],
     }
 }
+
+#[tokio::test]
+async fn reauthorization_with_import_settings_releases_claim_without_committing() {
+    let events = events();
+    let provider = FakeProviderAdmin::new("openai", events.clone());
+    let store = FakeAccountStore::new("openai", events.clone());
+    let services = service(provider, store.clone()).await;
+    services
+        .openai()
+        .start_authorization(StartAuthorization {
+            outbound_proxy: None,
+            context: context("reauthorization-settings"),
+            name: "existing account".to_owned(),
+            reauthorization: Some(ProviderAccountId::new("acct_test").expect("account ID")),
+        })
+        .await
+        .expect("start reauthorization");
+    let error = services
+        .openai()
+        .complete_authorization(CompleteAuthorization {
+            settings: Some(super::accounts::import_settings()),
+            context: context("reauthorization-settings"),
+            flow_id: "flow-test".to_owned(),
+            callback_url: "http://localhost/callback?code=test&state=test".to_owned(),
+        })
+        .await
+        .expect_err("reauthorization must preserve settings");
+    assert_eq!(error.kind(), gateway_admin::model::AdminErrorKind::Invalid);
+    assert!(!recorded(&events).contains(&"store.commit_authorization"));
+    assert!(store.import_settings().is_empty());
+}

backend/crates/gateway-admin/tests/use_case/xai.rs

@@ -20,6 +20,7 @@ async fn xai_import_should_prepare_before_atomic_store_commit() {
     services
         .xai()
         .import_document(ImportCredentials {
+            settings: Some(super::accounts::import_settings()),
             context: context("import-xai"),
             document: document(),
         })
@@ -42,6 +43,10 @@ async fn xai_import_should_prepare_before_atomic_store_commit() {
             rolling_usage: None,
         }]
     );
+    assert_eq!(
+        store.import_settings(),
+        [Some(super::accounts::import_settings())]
+    );
     assert_eq!(store.audit_requests(), ["import-xai"]);
 }
 
@@ -56,6 +61,7 @@ async fn xai_import_should_refresh_quota_for_every_imported_account() {
     services
         .xai()
         .import_document(ImportCredentials {
+            settings: None,
             context: context("import-xai-batch"),
             document: document(),
         })
@@ -90,6 +96,7 @@ async fn xai_import_should_remain_successful_when_quota_refresh_fails() {
     let result = services
         .xai()
         .import_document(ImportCredentials {
+            settings: None,
             context: context("import-xai-quota-failure"),
             document: document(),
         })

backend/crates/gateway-api/Cargo.toml

@@ -2,7 +2,7 @@
 name = "gateway-api"
 version = "0.1.0"
 edition = "2024"
-license = "MIT"
+license = "Apache-2.0"
 publish = false
 rust-version = "1.97"
 autotests = false

backend/crates/gateway-api/src/admin/accounts/credentials.rs

@@ -18,16 +18,51 @@ impl AccountProvider {
     }
 }
 
+/// 导入统一设置，复用编辑账号的调度和分组约束。
+#[derive(Debug, Clone, Deserialize)]
+#[serde(rename_all = "camelCase", deny_unknown_fields)]
+pub struct AccountImportSettingsRequest {
+    pub enabled: bool,
+    #[serde(deserialize_with = "deserialize_required_nullable")]
+    pub concurrency_limit: Option<u64>,
+    pub weight: u64,
+    pub group_ids: Vec<String>,
+}
+
+impl AccountImportSettingsRequest {
+    fn validate(&self) -> Result<(), WireValidationError> {
+        parse_concurrency_limit(self.concurrency_limit)?;
+        parse_account_weight(self.weight)?;
+        validate_wire_group_ids(&self.group_ids)?;
+        Ok(())
+    }
+
+    fn into_settings(
+        self,
+    ) -> Result<gateway_admin::model::accounts::AccountImportSettings, WireValidationError> {
+        Ok(gateway_admin::model::accounts::AccountImportSettings {
+            enabled: self.enabled,
+            concurrency_limit: parse_concurrency_limit(self.concurrency_limit)?,
+            weight: parse_account_weight(self.weight)?,
+            group_ids: validate_wire_group_ids(&self.group_ids)?,
+        })
+    }
+}
+
 /// Provider-owned 账号导入请求；公共 API 不解释 `data` 内部字段。
 #[derive(Deserialize)]
 #[serde(rename_all = "camelCase", deny_unknown_fields)]
 pub struct AccountImportRequest {
+    pub settings: Option<AccountImportSettingsRequest>,
     pub provider: String,
     pub data: Value,
 }
 
 impl AccountImportRequest {
     pub fn validate(&self) -> Result<(), WireValidationError> {
+        if let Some(settings) = &self.settings {
+            settings.validate()?;
+        }
         AccountProvider::parse(&self.provider)?;
         if !self.data.is_object()
             || serde_json::to_vec(&self.data)
@@ -47,6 +82,10 @@ impl AccountImportRequest {
         Ok((
             provider,
             ImportCredentials {
+                settings: self
+                    .settings
+                    .map(AccountImportSettingsRequest::into_settings)
+                    .transpose()?,
                 context,
                 document: provider_document(self.data, "data")?,
             },
@@ -60,6 +99,7 @@ pub struct StartAccountAuthorizationRequest {
     pub provider: String,
     pub name: String,
     pub account_id: Option<String>,
+    pub outbound_proxy_url: Option<super::wire::AccountProxyUpdate>,
 }
 
 impl StartAccountAuthorizationRequest {
@@ -89,6 +129,7 @@ impl StartAccountAuthorizationRequest {
                 context,
                 name: self.name,
                 reauthorization,
+                outbound_proxy: self.outbound_proxy_url.and_then(|value| value.0),
             },
         ))
     }
@@ -97,6 +138,7 @@ impl StartAccountAuthorizationRequest {
 #[derive(Deserialize)]
 #[serde(rename_all = "camelCase", deny_unknown_fields)]
 pub struct CompleteAccountAuthorizationRequest {
+    pub settings: Option<AccountImportSettingsRequest>,
     pub provider: String,
     pub flow_id: String,
     pub callback_url: String,
@@ -104,6 +146,9 @@ pub struct CompleteAccountAuthorizationRequest {
 
 impl CompleteAccountAuthorizationRequest {
     pub fn validate(&self) -> Result<(), WireValidationError> {
+        if let Some(settings) = &self.settings {
+            settings.validate()?;
+        }
         let provider = AccountProvider::parse(&self.provider)?;
         match provider {
             AccountProvider::OpenAi => {
@@ -128,6 +173,10 @@ impl CompleteAccountAuthorizationRequest {
         Ok((
             provider,
             CompleteAuthorization {
+                settings: self
+                    .settings
+                    .map(AccountImportSettingsRequest::into_settings)
+                    .transpose()?,
                 context,
                 flow_id: self.flow_id,
                 callback_url: self.callback_url,
@@ -139,6 +188,7 @@ impl CompleteAccountAuthorizationRequest {
 #[derive(Debug, Clone, Deserialize)]
 #[serde(rename_all = "camelCase", deny_unknown_fields)]
 pub struct UpdateAccountRequest {
+    pub outbound_proxy_url: Option<super::wire::AccountProxyUpdate>,
     pub account_id: String,
     pub enabled: bool,
     #[serde(deserialize_with = "deserialize_required_nullable")]
@@ -159,6 +209,7 @@ impl UpdateAccountRequest {
     pub(super) fn into_command(self) -> Result<UpdateAccount, WireValidationError> {
         self.validate()?;
         Ok(UpdateAccount {
+            outbound_proxy: self.outbound_proxy_url.map(|value| value.0),
             account_id: self.account_id,
             enabled: self.enabled,
             concurrency_limit: parse_concurrency_limit(self.concurrency_limit)?,

backend/crates/gateway-api/src/admin/accounts/mod.rs

@@ -70,6 +70,7 @@ mod wire;
 
 pub use credentials::*;
 pub use handlers::{profile_avatar_response, router};
+pub(super) use presenter::quota_window_view;
 pub use wire::*;
 
 use credentials::{

backend/crates/gateway-api/src/admin/accounts/presenter.rs

@@ -59,6 +59,7 @@ pub(super) fn account_models_data(result: ProviderModels) -> AccountModelsData {
 pub(super) fn account_view(item: AccountDirectoryItem, now: DateTime<Utc>) -> AccountView {
     let AccountDirectoryItem {
         account,
+        plan_type_display,
         projection,
         usage,
         quota,
@@ -89,6 +90,7 @@ pub(super) fn account_view(item: AccountDirectoryItem, now: DateTime<Utc>) -> Ac
         user_id: account.upstream_user_id,
         label: None,
         plan_type: account.plan_type,
+        plan_type_display: plan_type_display.unwrap_or_else(|| "未知套餐".to_owned()),
         authentication_kind: account.authentication_kind,
         has_refresh_token: account.has_refresh_token,
         status,
@@ -99,6 +101,10 @@ pub(super) fn account_view(item: AccountDirectoryItem, now: DateTime<Utc>) -> Ac
         enabled: account.enabled,
         concurrency_limit: account.concurrency_limit.map(|limit| limit.get()),
         weight: account.weight.get(),
+        outbound_proxy_endpoint: account
+            .outbound_proxy
+            .as_ref()
+            .map(|proxy| proxy.endpoint()),
         access_token_expires_at: expires_at,
         access_token_expires_at_display: account
             .access_token_expires_at
@@ -140,7 +146,7 @@ pub(super) fn account_quota_view(
     )
 }
 
-pub(super) fn quota_window_view(window: ProviderQuotaWindow) -> AccountQuotaWindowView {
+pub(crate) fn quota_window_view(window: ProviderQuotaWindow) -> AccountQuotaWindowView {
     let ProviderQuotaWindow {
         key,
         group,
@@ -230,6 +236,8 @@ pub(super) fn account_usage_view(
         output_tokens_display: display_optional_tokens(usage.output_tokens),
         cached_tokens: usage.cached_tokens,
         cached_tokens_display: display_optional_tokens(usage.cached_tokens),
+        reasoning_tokens: usage.reasoning_tokens,
+        reasoning_tokens_display: display_optional_tokens(usage.reasoning_tokens),
         image_input_tokens: usage.image_input_tokens,
         image_input_tokens_display: display_optional_tokens(usage.image_input_tokens),
         image_output_tokens: usage.image_output_tokens,
@@ -347,6 +355,8 @@ pub(super) fn empty_account_usage() -> AccountUsageView {
         output_tokens_display: "—".to_owned(),
         cached_tokens: None,
         cached_tokens_display: "—".to_owned(),
+        reasoning_tokens: None,
+        reasoning_tokens_display: "—".to_owned(),
         image_input_tokens: None,
         image_input_tokens_display: "—".to_owned(),
         image_output_tokens: None,

backend/crates/gateway-api/src/admin/accounts/wire.rs

@@ -2,6 +2,21 @@
 
 use super::*;
 
+#[derive(Debug, Clone)]
+pub struct AccountProxyUpdate(pub Option<gateway_core::account::OutboundProxy>);
+
+impl<'de> Deserialize<'de> for AccountProxyUpdate {
+    fn deserialize<D: serde::Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
+        let value = String::deserialize(deserializer)?;
+        if value.is_empty() {
+            return Ok(Self(None));
+        }
+        gateway_core::account::OutboundProxy::parse(&value)
+            .map(|proxy| Self(Some(proxy)))
+            .map_err(serde::de::Error::custom)
+    }
+}
+
 /// 账号列表查询参数。
 #[derive(Debug, Clone, Default, Deserialize)]
 #[serde(rename_all = "camelCase", deny_unknown_fields)]
@@ -19,6 +34,7 @@ pub struct ListQuery {
 #[derive(Debug, Clone, Deserialize)]
 #[serde(rename_all = "camelCase", deny_unknown_fields)]
 pub struct BatchUpdateAccountsRequest {
+    pub outbound_proxy_url: Option<AccountProxyUpdate>,
     pub account_ids: Vec<String>,
     pub enabled: bool,
     #[serde(deserialize_with = "deserialize_required_nullable")]
@@ -68,6 +84,7 @@ impl BatchUpdateAccountsRequest {
     pub(super) fn into_command(self) -> Result<BatchUpdateAccounts, WireValidationError> {
         self.validate()?;
         Ok(BatchUpdateAccounts {
+            outbound_proxy: self.outbound_proxy_url.map(|value| value.0),
             account_ids: self.account_ids,
             enabled: self.enabled,
             concurrency_limit: parse_concurrency_limit(self.concurrency_limit)?,
@@ -192,6 +209,7 @@ pub struct AccountSummaryView {
 #[derive(Debug, Clone, Serialize)]
 #[serde(rename_all = "camelCase")]
 pub struct AccountView {
+    pub outbound_proxy_endpoint: Option<String>,
     pub id: String,
     pub name: String,
     pub provider: String,
@@ -202,6 +220,8 @@ pub struct AccountView {
     pub user_id: Option<String>,
     pub label: Option<String>,
     pub plan_type: Option<String>,
+    /// 后端生成的套餐展示名称；缺失套餐时为“未知套餐”。
+    pub plan_type_display: String,
     pub authentication_kind: String,
     pub has_refresh_token: bool,
     pub status: String,
@@ -276,6 +296,8 @@ pub struct AccountUsageView {
     pub output_tokens_display: String,
     pub cached_tokens: Option<u64>,
     pub cached_tokens_display: String,
+    pub reasoning_tokens: Option<u64>,
+    pub reasoning_tokens_display: String,
     pub image_input_tokens: Option<u64>,
     pub image_input_tokens_display: String,
     pub image_output_tokens: Option<u64>,

backend/crates/gateway-api/src/admin/client_keys.rs

@@ -11,6 +11,8 @@ use gateway_admin::model::client_keys::{
     CreatedClientKey, DeleteClientKey, SetClientKeyEnabled, SortDirection, UpdateClientKey,
 };
 use gateway_core::{
+    engine::budget::ClientBudgetLimits,
+    metering::Decimal,
     policy::{ClientApiKeyId, RateLimits},
     routing::AccountGroupId,
 };
@@ -33,6 +35,15 @@ const MAX_CURSOR_BYTES: usize = 512;
 const MAX_SEARCH_BYTES: usize = 256;
 const DEFAULT_PAGE_SIZE: u16 = 50;
 
+fn parse_budget(
+    value: Option<String>,
+    field: &'static str,
+) -> Result<Option<Decimal>, WireValidationError> {
+    value
+        .map(|value| value.parse().map_err(|_| WireValidationError::new(field)))
+        .transpose()
+}
+
 /// Client Key 列表查询。
 #[derive(Debug, Clone, PartialEq, Eq, Deserialize)]
 #[serde(rename_all = "camelCase", deny_unknown_fields)]
@@ -140,6 +151,8 @@ pub struct CreateClientKeyRequest {
     group_ids: Vec<String>,
     max_concurrency: u64,
     requests_per_minute: u64,
+    daily_limit_usd: Option<String>,
+    weekly_limit_usd: Option<String>,
 }
 
 impl CreateClientKeyRequest {
@@ -154,6 +167,11 @@ impl CreateClientKeyRequest {
             name: self.name,
             label: self.label,
             group_ids,
+            budget: ClientBudgetLimits {
+                daily_usd: parse_budget(self.daily_limit_usd, "dailyLimitUsd")?.unwrap_or_default(),
+                weekly_usd: parse_budget(self.weekly_limit_usd, "weeklyLimitUsd")?
+                    .unwrap_or_default(),
+            },
             limits: RateLimits {
                 max_concurrency: self.max_concurrency,
                 requests_per_minute: self.requests_per_minute,
@@ -172,6 +190,8 @@ pub struct UpdateClientKeyRequest {
     group_ids: Vec<String>,
     max_concurrency: u64,
     requests_per_minute: u64,
+    daily_limit_usd: Option<String>,
+    weekly_limit_usd: Option<String>,
 }
 
 impl UpdateClientKeyRequest {
@@ -188,6 +208,8 @@ impl UpdateClientKeyRequest {
             name: self.name,
             label: self.label,
             group_ids,
+            daily_limit_usd: parse_budget(self.daily_limit_usd, "dailyLimitUsd")?,
+            weekly_limit_usd: parse_budget(self.weekly_limit_usd, "weeklyLimitUsd")?,
             limits: RateLimits {
                 max_concurrency: self.max_concurrency,
                 requests_per_minute: self.requests_per_minute,
@@ -247,6 +269,12 @@ pub struct ClientKeyView {
     enabled: bool,
     max_concurrency: u64,
     requests_per_minute: u64,
+    daily_limit_usd: String,
+    weekly_limit_usd: String,
+    daily_used_usd: String,
+    weekly_used_usd: String,
+    daily_resets_at: Option<DateTime<Utc>>,
+    weekly_resets_at: Option<DateTime<Utc>>,
     created_at: DateTime<Utc>,
     updated_at: DateTime<Utc>,
     last_used_at: Option<DateTime<Utc>>,
@@ -292,6 +320,12 @@ impl From<ClientKeyRecord> for ClientKeyView {
             enabled: record.enabled,
             max_concurrency: record.limits.max_concurrency,
             requests_per_minute: record.limits.requests_per_minute,
+            daily_limit_usd: record.budget.limits.daily_usd.canonical(),
+            weekly_limit_usd: record.budget.limits.weekly_usd.canonical(),
+            daily_used_usd: record.budget.daily_used_usd.canonical(),
+            weekly_used_usd: record.budget.weekly_used_usd.canonical(),
+            daily_resets_at: record.budget.daily_resets_at.map(DateTime::from),
+            weekly_resets_at: record.budget.weekly_resets_at.map(DateTime::from),
             created_at: record.created_at,
             updated_at: record.updated_at,
             last_used_at: record.last_used_at,

backend/crates/gateway-api/src/admin/observability/presenter.rs

@@ -213,13 +213,17 @@ fn capitalize_first(value: &str) -> String {
 
 pub(crate) fn billing_view(billing: Option<&domain::UsageBilling>) -> Option<BillingView> {
     match billing? {
-        domain::UsageBilling::Total { total, .. } => Some(BillingView {
+        domain::UsageBilling::Total { source, total } => Some(BillingView {
             input_amount_display: "—".to_owned(),
             output_amount_display: "—".to_owned(),
             cache_read_amount_display: "—".to_owned(),
             cache_write_amount_display: "—".to_owned(),
             standard_amount_display: "—".to_owned(),
-            total_amount_display: format_money(total),
+            total_amount_display: if source == "calculated" {
+                format!("≈ {}", format_money(total))
+            } else {
+                format_money(total)
+            },
             input_price_display: "—".to_owned(),
             output_price_display: "—".to_owned(),
             cache_read_price_display: "—".to_owned(),
@@ -505,6 +509,8 @@ pub(crate) fn usage_attempt_view(attempt: domain::UsageAttempt) -> UsageAttemptV
 
 pub(crate) fn usage_detail_view(detail: domain::UsageDetail) -> UsageRecordDetailView {
     UsageRecordDetailView {
+        trace: detail.trace,
+        related_requests: detail.related_requests,
         request: usage_record_view(detail.request),
         attempts: detail
             .attempts
@@ -560,7 +566,6 @@ pub(crate) fn ops_error_view(error: domain::OpsError) -> OpsErrorView {
         failure_class: error.failure_kind,
         upstream_send_state: error.upstream_send_state,
         provider_error_code: error.provider_error_code,
-        occurrence_count: error.occurrence_count,
         response_id: error.client_response_id,
         upstream_request_id: error.upstream_request_id,
         latency_ms: error.latency_ms,
@@ -864,6 +869,28 @@ pub(crate) fn dashboard_view(
     } = observation;
     let mut account_usage_views = Vec::with_capacity(account_usage.len());
     for credential in account_usage {
+        let local_requests = credential
+            .quota_window
+            .as_ref()
+            .filter(|window| window.used_percent.is_none())
+            .and_then(|window| window.local_usage.as_ref())
+            .map(|usage| usage.request_count);
+        let (metric_label, metric_value) = match local_requests {
+            Some(count) => (
+                "次数".to_owned(),
+                if count > 0 {
+                    format_compact_number(count)
+                } else {
+                    "—".to_owned()
+                },
+            ),
+            None => (
+                "今日 Token".to_owned(),
+                credential
+                    .total_tokens
+                    .map_or_else(|| "—".to_owned(), format_compact_number),
+            ),
+        };
         account_usage_views.push(DashboardAccountUsageView {
             id: credential.account_id.clone(),
             provider: credential.provider_kind.clone(),
@@ -873,6 +900,10 @@ pub(crate) fn dashboard_view(
                 .clone()
                 .unwrap_or_else(|| credential.name.clone()),
             plan_type: credential.plan_type.clone(),
+            plan_type_display: credential
+                .plan_type_display
+                .clone()
+                .unwrap_or_else(|| "未知套餐".to_owned()),
             tokens: credential
                 .total_tokens
                 .map_or_else(|| "—".to_owned(), format_compact_number),
@@ -886,6 +917,11 @@ pub(crate) fn dashboard_view(
                 })
                 .collect(),
             quota_used_percent: credential.quota_used_percent,
+            usage_window: credential
+                .quota_window
+                .map(crate::admin::accounts::quota_window_view),
+            metric_label,
+            metric_value,
             last_used: relative_time(credential.last_used_at, range.end),
         });
     }

backend/crates/gateway-api/src/admin/observability/wire.rs

@@ -247,6 +247,8 @@ pub struct UsageAttemptView {
 #[derive(Serialize)]
 #[serde(rename_all = "camelCase")]
 pub struct UsageRecordDetailView {
+    pub trace: Option<serde_json::Value>,
+    pub related_requests: Vec<serde_json::Value>,
     #[serde(flatten)]
     pub request: UsageRecordView,
     pub attempts: Vec<UsageAttemptView>,
@@ -371,10 +373,14 @@ pub struct DashboardAccountUsageView {
     pub authentication_kind: String,
     pub email: String,
     pub plan_type: Option<String>,
+    pub plan_type_display: String,
     pub tokens: String,
     pub request_count: u64,
     pub request_buckets: Vec<DashboardAccountRequestBucketView>,
     pub quota_used_percent: Option<f64>,
+    pub usage_window: Option<crate::admin::accounts::AccountQuotaWindowView>,
+    pub metric_label: String,
+    pub metric_value: String,
     pub last_used: String,
 }
 
@@ -778,7 +784,6 @@ pub struct OpsErrorView {
     pub failure_class: String,
     pub upstream_send_state: Option<String>,
     pub provider_error_code: Option<String>,
-    pub occurrence_count: u32,
     pub response_id: Option<String>,
     pub upstream_request_id: Option<String>,
     pub latency_ms: Option<u64>,

backend/crates/gateway-api/src/lib.rs

@@ -180,13 +180,16 @@ pub fn initialize(
                 "request",
                 request_id = %request_id,
                 method = %request.method().as_str(),
-                uri = %request
-                    .uri()
-                    .path_and_query()
-                    .map(axum::http::uri::PathAndQuery::as_str)
-                    .unwrap_or_default(),
+                uri = %request.uri().path(),
             )
         }
+    })
+    .on_request(|_request: &Request<_>, _span: &tracing::Span| {
+        tracing::info!(target: "request_trace", stage = "http.received", "HTTP request received");
+    })
+    .on_response(|response: &axum::http::Response<_>, latency: Duration, _span: &tracing::Span| {
+        tracing::info!(target: "request_trace", stage = "http.response", status = response.status().as_u16(),
+            headers_ms = latency.as_millis(), "HTTP response headers ready");
     });
     let router = router
         .layer(PropagateRequestIdLayer::new(request_id_header.clone()))

backend/crates/gateway-api/src/openai/endpoint.rs

@@ -0,0 +1,124 @@
+//! OpenAI Provider 原生非流式 JSON 端点的公共交付边界。
+
+use axum::{
+    body::{Body, Bytes},
+    http::{HeaderName, HeaderValue, StatusCode, header::CONTENT_TYPE},
+    response::{IntoResponse, Response},
+};
+use gateway_core::engine::execution::StartedExecution;
+use gateway_core::event::{ProviderEvent, ProviderResponseHeader};
+
+use super::{
+    error::{engine_error_response, protocol_error_response},
+    responses::{PendingExecution, ProtocolError, ProtocolErrorBody},
+};
+
+/// 收集一个 Provider 原生 JSON 响应，并在 Core commit 后按原始 bytes 交付。
+pub(super) async fn collect_raw_json_response(started: StartedExecution) -> Response {
+    let mut execution = PendingExecution::new(started.session);
+    let Some(session) = execution.session_mut() else {
+        return invalid_upstream_response();
+    };
+    let events = match session.collect_uncommitted().await {
+        Ok(events) => events,
+        Err(error) => {
+            let response = engine_error_response(&error);
+            return execution.record_response_status(response).await;
+        }
+    };
+    let body = match raw_json_body(events) {
+        Some(body) => body,
+        None => {
+            let response = invalid_upstream_response();
+            let response = execution.record_response_status(response).await;
+            execution.cancel_and_finalize().await;
+            return response;
+        }
+    };
+    let status = session
+        .response_status_code()
+        .and_then(|status| StatusCode::from_u16(status).ok())
+        .filter(StatusCode::is_success)
+        .unwrap_or(StatusCode::OK);
+    let response_headers = session.response_headers().to_vec();
+    let response = json_body_response(body, status, &response_headers);
+    let Some(session) = execution.session_mut() else {
+        return invalid_upstream_response();
+    };
+    if let Err(error) = session.commit_downstream(Some(status.as_u16())).await {
+        execution.cancel_and_finalize().await;
+        let response = engine_error_response(&error);
+        return execution.record_response_status(response).await;
+    }
+    if !session.is_finalized() {
+        execution.cancel_and_finalize().await;
+        return invalid_upstream_response();
+    }
+    execution.disarm();
+    response
+}
+
+fn raw_json_body(events: Vec<ProviderEvent>) -> Option<Bytes> {
+    let mut body = None;
+    for event in events {
+        let (_, wire) = event.into_parts();
+        let Some(wire) = wire.filter(|wire| wire.protocol() == "openai") else {
+            continue;
+        };
+        let Some(raw) = wire.into_raw_json_body() else {
+            continue;
+        };
+        if body.replace(raw).is_some() {
+            return None;
+        }
+    }
+    body
+}
+
+fn json_body_response(
+    body: Bytes,
+    status: StatusCode,
+    response_headers: &[ProviderResponseHeader],
+) -> Response {
+    let mut response = Response::new(Body::from(body));
+    *response.status_mut() = status;
+    response
+        .headers_mut()
+        .insert(CONTENT_TYPE, HeaderValue::from_static("application/json"));
+    apply_response_headers(response, response_headers)
+}
+
+fn apply_response_headers(
+    mut response: Response,
+    response_headers: &[ProviderResponseHeader],
+) -> Response {
+    let connection_options = super::responses::response_connection_options(response_headers);
+    for header in response_headers {
+        if !super::responses::response_header_is_forwardable(header.name(), &connection_options) {
+            continue;
+        }
+        let Ok(name) = HeaderName::from_bytes(header.name().as_bytes()) else {
+            continue;
+        };
+        let Ok(value) = HeaderValue::from_bytes(header.value()) else {
+            continue;
+        };
+        response.headers_mut().append(name, value);
+    }
+    response
+}
+
+fn invalid_upstream_response() -> Response {
+    protocol_error_response(
+        StatusCode::BAD_GATEWAY,
+        ProtocolErrorBody {
+            error: ProtocolError {
+                kind: "server_error",
+                code: "invalid_upstream_response",
+                message: "The gateway could not forward the upstream JSON response.".to_owned(),
+                param: None,
+            },
+        },
+    )
+    .into_response()
+}

backend/crates/gateway-api/src/openai/error.rs

@@ -143,13 +143,27 @@ pub fn gateway_error_from_engine(error: &EngineError) -> GatewayError {
 /// Gateway 错误的 OpenAI HTTP 表达。
 pub fn gateway_error_response(error: &GatewayError) -> Response {
     let (status, default_type, default_code) = gateway_error_contract(error.kind());
-    openai_error_response(
+    let mut response = openai_error_response(
         status,
         error.client_message(),
         error.client_error_type().unwrap_or(default_type),
         error.client_error_code().unwrap_or(default_code),
     )
-    .into_response()
+    .into_response();
+    if let Some(delay) = error.retry_after()
+        && let Ok(value) = HeaderValue::from_str(
+            &delay
+                .as_secs()
+                .saturating_add(u64::from(delay.subsec_nanos() > 0))
+                .max(1)
+                .to_string(),
+        )
+    {
+        response
+            .headers_mut()
+            .insert(axum::http::header::RETRY_AFTER, value);
+    }
+    response
 }
 
 /// 在下游尚未提交时优先交付 Provider 的原始 HTTP 失败响应。

backend/crates/gateway-api/src/openai/images/http.rs

@@ -3,22 +3,21 @@
 use std::net::SocketAddr;
 
 use axum::{
-    body::{Body, Bytes},
+    body::Bytes,
     extract::{Extension, State, connect_info::ConnectInfo},
-    http::{HeaderMap, HeaderName, HeaderValue, StatusCode, header::CONTENT_TYPE},
-    response::{IntoResponse, Response},
+    http::HeaderMap,
+    response::Response,
 };
-use gateway_core::engine::execution::StartedExecution;
 use gateway_core::error::{GatewayError, GatewayErrorKind};
-use gateway_core::event::{ProviderEvent, ProviderResponseHeader};
 use gateway_core::operation::{ImageRequest, ImageRequestKind, Operation, RawJsonPayload};
-use serde_json::{Map, Value};
+use serde_json::Value;
 
 use crate::ApiState;
 use crate::openai::{
     auth::{authenticate_client, client_access_error_response},
-    error::{engine_error_response, gateway_error_response, protocol_error_response},
-    responses::{PendingExecution, ProtocolError, ProtocolErrorBody, request_client_context},
+    endpoint::collect_raw_json_response,
+    error::gateway_error_response,
+    responses::{OpenAiRequestHeaders, request_client_context},
 };
 
 const OPENAI_PROTOCOL: &str = "openai";
@@ -82,13 +81,13 @@ async fn handle_image_request(
         Err(error) => return gateway_error_response(&error),
     };
     let started = match service
-        .start_image(client, operation, client_ip, user_agent, endpoint)
+        .start_provider_endpoint(client, operation, client_ip, user_agent, endpoint)
         .await
     {
         Ok(started) => started,
         Err(error) => return gateway_error_response(&error),
     };
-    collect_image_response(started).await
+    collect_raw_json_response(started).await
 }
 
 fn image_operation(
@@ -96,7 +95,7 @@ fn image_operation(
     headers: &HeaderMap,
     kind: ImageRequestKind,
 ) -> Result<Operation, GatewayError> {
-    let mut context = Map::new();
+    let mut context = OpenAiRequestHeaders::from_headers(headers).session_context();
     if let Some(turn_id) = headers
         .get("x-codex-image-turn-id")
         .and_then(|value| value.to_str().ok())
@@ -118,116 +117,3 @@ fn image_operation(
         kind, payload,
     )))
 }
-
-async fn collect_image_response(started: StartedExecution) -> Response {
-    let mut execution = PendingExecution::new(started.session);
-    let Some(session) = execution.session_mut() else {
-        return invalid_upstream_response();
-    };
-    let events = match session.collect_uncommitted().await {
-        Ok(events) => events,
-        Err(error) => {
-            let response = engine_error_response(&error);
-            return execution.record_response_status(response).await;
-        }
-    };
-    let body = match raw_json_body(events) {
-        Some(body) => body,
-        None => {
-            let response = invalid_upstream_response();
-            let response = execution.record_response_status(response).await;
-            execution.cancel_and_finalize().await;
-            return response;
-        }
-    };
-    let status = session
-        .response_status_code()
-        .and_then(|status| StatusCode::from_u16(status).ok())
-        .filter(StatusCode::is_success)
-        .unwrap_or(StatusCode::OK);
-    let response_headers = session.response_headers().to_vec();
-    let response = json_body_response(body, status, &response_headers);
-    let Some(session) = execution.session_mut() else {
-        return invalid_upstream_response();
-    };
-    if let Err(error) = session.commit_downstream(Some(status.as_u16())).await {
-        execution.cancel_and_finalize().await;
-        let response = engine_error_response(&error);
-        return execution.record_response_status(response).await;
-    }
-    if !session.is_finalized() {
-        execution.cancel_and_finalize().await;
-        return invalid_upstream_response();
-    }
-    execution.disarm();
-    response
-}
-
-fn raw_json_body(events: Vec<ProviderEvent>) -> Option<Bytes> {
-    let mut body = None;
-    for event in events {
-        let (_, wire) = event.into_parts();
-        let Some(wire) = wire.filter(|wire| wire.protocol() == "openai") else {
-            continue;
-        };
-        let Some(raw) = wire.into_raw_json_body() else {
-            continue;
-        };
-        if body.replace(raw).is_some() {
-            return None;
-        }
-    }
-    body
-}
-
-fn json_body_response(
-    body: Bytes,
-    status: StatusCode,
-    response_headers: &[ProviderResponseHeader],
-) -> Response {
-    let mut response = Response::new(Body::from(body));
-    *response.status_mut() = status;
-    response
-        .headers_mut()
-        .insert(CONTENT_TYPE, HeaderValue::from_static("application/json"));
-    apply_response_headers(response, response_headers)
-}
-
-fn apply_response_headers(
-    mut response: Response,
-    response_headers: &[ProviderResponseHeader],
-) -> Response {
-    let connection_options =
-        crate::openai::responses::response_connection_options(response_headers);
-    for header in response_headers {
-        if !crate::openai::responses::response_header_is_forwardable(
-            header.name(),
-            &connection_options,
-        ) {
-            continue;
-        }
-        let Ok(name) = HeaderName::from_bytes(header.name().as_bytes()) else {
-            continue;
-        };
-        let Ok(value) = HeaderValue::from_bytes(header.value()) else {
-            continue;
-        };
-        response.headers_mut().append(name, value);
-    }
-    response
-}
-
-fn invalid_upstream_response() -> Response {
-    protocol_error_response(
-        StatusCode::BAD_GATEWAY,
-        ProtocolErrorBody {
-            error: ProtocolError {
-                kind: "server_error",
-                code: "invalid_upstream_response",
-                message: "The gateway could not forward the upstream image response.".to_owned(),
-                param: None,
-            },
-        },
-    )
-    .into_response()
-}

backend/crates/gateway-api/src/openai/mod.rs

@@ -1,9 +1,11 @@
 //! OpenAI 客户端协议 adapter。
 
 pub mod auth;
+mod endpoint;
 pub mod error;
 pub mod images;
 pub mod models;
 pub mod responses;
 pub mod router;
+pub mod search;
 pub(crate) mod service;

backend/crates/gateway-api/src/openai/models.rs

@@ -97,50 +97,6 @@ pub(crate) async fn model_detail(
         .into_response()
 }
 
-/// `GET /v1/models/catalog`。
-///
-/// 新架构的目录由 core 按客户端 Provider 范围裁剪；这里不读取或重建任一
-/// Provider 的 wire catalog，只恢复 Codex 客户端依赖的稳定展示合同。
-pub(crate) async fn model_catalog(State(state): State<ApiState>, headers: HeaderMap) -> Response {
-    let service = state.openai();
-    let client = match authenticate_client(service, &headers) {
-        Ok(client) => client,
-        Err(error) => return client_access_error_response(error),
-    };
-    let models = service
-        .public_models(&client)
-        .into_iter()
-        .map(|model| catalog_model_json(model.as_str()))
-        .collect::<Vec<_>>();
-
-    (StatusCode::OK, Json(models)).into_response()
-}
-
-/// `GET /v1/models/{model_id}/info`。
-pub(crate) async fn model_info(
-    State(state): State<ApiState>,
-    headers: HeaderMap,
-    Path(model_id): Path<String>,
-) -> Response {
-    let service = state.openai();
-    let client = match authenticate_client(service, &headers) {
-        Ok(client) => client,
-        Err(error) => return client_access_error_response(error),
-    };
-    let Ok(public_model) = PublicModelId::new(model_id) else {
-        return model_not_found_response().into_response();
-    };
-    if !service.contains_public_model(&client, &public_model) {
-        return model_not_found_response().into_response();
-    }
-
-    (
-        StatusCode::OK,
-        Json(catalog_model_json(public_model.as_str())),
-    )
-        .into_response()
-}
-
 fn openai_model_json(id: &str) -> Value {
     json!({
         "id": id,
@@ -150,22 +106,6 @@ fn openai_model_json(id: &str) -> Value {
     })
 }
 
-fn catalog_model_json(id: &str) -> Value {
-    json!({
-        "id": id,
-        "displayName": id,
-        "description": "",
-        "isDefault": false,
-        "supportedReasoningEfforts": [],
-        "defaultReasoningEffort": "",
-        "inputModalities": ["text"],
-        "outputModalities": ["text"],
-        "supportsPersonality": false,
-        "upgrade": Value::Null,
-        "source": "gateway",
-    })
-}
-
 fn codex_model_json(profile: &PublicModelProfile, index: usize) -> Value {
     let id = profile.model().as_str();
     let presentation = profile.presentation();

backend/crates/gateway-api/src/openai/responses/http.rs

@@ -3,6 +3,7 @@
 use std::collections::VecDeque;
 use std::convert::Infallible;
 use std::net::{IpAddr, SocketAddr};
+use std::time::Duration;
 
 use axum::{
     body::{Body, Bytes},
@@ -13,9 +14,10 @@ use axum::{
     },
     response::{IntoResponse, Response},
 };
-use futures::stream;
-use gateway_core::engine::CommitRequirement;
+use futures::{StreamExt, stream};
+use gateway_core::diagnostics::TraceContext;
 use gateway_core::engine::execution::{ClientTransport, ExecutionSession, StartedExecution};
+use gateway_core::engine::{CommitRequirement, EngineError};
 use gateway_core::error::{GatewayError, GatewayErrorKind};
 use gateway_core::event::{ProviderEvent, ProviderResponseHeader};
 use gateway_core::lifecycle::ConnectionGuard;
@@ -32,46 +34,25 @@ use crate::openai::{
 
 use super::{
     OpenAiResponsesEncoder, ProtocolErrorBody, ResponseEncodeError,
-    request::{decode_request_with_headers, decode_review_request_with_headers},
+    request::decode_request_with_headers,
 };
 
+const SSE_KEEPALIVE_INTERVAL: Duration = Duration::from_secs(15);
+
 /// `POST /v1/responses`。
 pub(crate) async fn responses(
     State(state): State<ApiState>,
     connect_info: Option<Extension<ConnectInfo<SocketAddr>>>,
+    ingress_id: Option<Extension<tower_http::request_id::RequestId>>,
     headers: HeaderMap,
     body: Bytes,
-) -> Response {
-    handle_responses(state, connect_info, headers, body, false).await
-}
-
-/// `POST /v1/responses/review`。
-pub(crate) async fn review_responses(
-    State(state): State<ApiState>,
-    connect_info: Option<Extension<ConnectInfo<SocketAddr>>>,
-    headers: HeaderMap,
-    body: Bytes,
-) -> Response {
-    handle_responses(state, connect_info, headers, body, true).await
-}
-
-async fn handle_responses(
-    state: ApiState,
-    connect_info: Option<Extension<ConnectInfo<SocketAddr>>>,
-    headers: HeaderMap,
-    body: Bytes,
-    review: bool,
 ) -> Response {
     let service = state.openai();
     let client = match authenticate_client(service, &headers) {
         Ok(client) => client,
         Err(error) => return client_access_error_response(error),
     };
-    let decoded = match if review {
-        decode_review_request_with_headers(&body, &headers)
-    } else {
-        decode_request_with_headers(&body, &headers)
-    } {
+    let decoded = match decode_request_with_headers(&body, &headers) {
         Ok(decoded) => decoded,
         Err(error) => {
             return protocol_error_response(StatusCode::BAD_REQUEST, error.protocol_body());
@@ -100,26 +81,32 @@ async fn handle_responses(
             } else {
                 ClientTransport::HttpJson
             },
-            if review {
-                "/v1/responses/review"
-            } else {
-                "/v1/responses"
-            },
+            "/v1/responses",
         )
         .await
     {
         Ok(started) => started,
         Err(error) => return gateway_error_response(&error),
     };
+    let trace = started.session.trace();
+    trace.headers("client.request", serde_json::json!({
+        "ingressRequestId": ingress_id.as_ref().and_then(|Extension(id)| id.header_value().to_str().ok()),
+    }), headers.iter().map(|(name, value)| (name.as_str(), value.as_bytes())));
+    trace.capture("client.request.body", &body);
+    let request_id_header = HeaderValue::from_str(started.request_id.as_str()).ok();
     let StartedExecution {
         stream, session, ..
     } = started;
-    if stream {
+    let mut response = if stream {
         stream_execution_response(session, connection_guard).await
     } else {
         drop(connection_guard);
         collect_execution_response(session).await
+    };
+    if let Some(id) = request_id_header {
+        response.headers_mut().insert("x-gateway-request-id", id);
     }
+    response
 }
 
 /// 从 socket 与标准转发头提取旧 Usage 页面使用的诊断事实。
@@ -180,7 +167,8 @@ pub async fn collect_execution_response(session: Box<dyn ExecutionSession>) -> R
     let events = match session.collect_uncommitted().await {
         Ok(events) => events,
         Err(error) => {
-            let response = engine_error_response(&error);
+            let response_headers = session.response_headers().to_vec();
+            let response = engine_error_response_with_headers(&error, &response_headers);
             return execution.record_response_status(response).await;
         }
     };
@@ -196,6 +184,11 @@ pub async fn collect_execution_response(session: Box<dyn ExecutionSession>) -> R
         }
     };
     let response_headers = session.response_headers().to_vec();
+    session.trace().record(
+        "downstream.encoded",
+        serde_json::json!({"transport": "http_json", "bytes": encoded.len()}),
+    );
+    session.trace().dump("downstream.body", &encoded);
     let response = json_body_response(encoded, &response_headers);
 
     let Some(session) = execution.session_mut() else {
@@ -206,7 +199,7 @@ pub async fn collect_execution_response(session: Box<dyn ExecutionSession>) -> R
         .await
     {
         execution.cancel_and_finalize().await;
-        let response = engine_error_response(&error);
+        let response = engine_error_response_with_headers(&error, &response_headers);
         return execution.record_response_status(response).await;
     }
     if !session.is_finalized() {
@@ -274,6 +267,13 @@ fn apply_response_headers(
     response
 }
 
+fn engine_error_response_with_headers(
+    error: &EngineError,
+    response_headers: &[ProviderResponseHeader],
+) -> Response {
+    apply_response_headers(engine_error_response(error), response_headers)
+}
+
 /// 编码首个 SSE frame 后提交下游，再持续驱动同一执行会话。
 pub async fn stream_execution_response(
     session: Box<dyn ExecutionSession>,
@@ -295,7 +295,8 @@ pub async fn stream_execution_response(
             return response;
         }
         Err(error) => {
-            let response = engine_error_response(&error);
+            let response_headers = session.response_headers().to_vec();
+            let response = engine_error_response_with_headers(&error, &response_headers);
             return execution.record_response_status(response).await;
         }
     };
@@ -327,7 +328,7 @@ pub async fn stream_execution_response(
         .await
     {
         execution.cancel_and_finalize().await;
-        let response = engine_error_response(&error);
+        let response = engine_error_response_with_headers(&error, &response_headers);
         return execution.record_response_status(response).await;
     }
     let Some(session) = execution.into_session() else {
@@ -337,9 +338,11 @@ pub async fn stream_execution_response(
     if state.encoder.is_completed() {
         state.finish_completed(Vec::new()).await;
     }
-    let body = Body::from_stream(stream::unfold(state, |mut state| async move {
+    let output = Box::pin(stream::unfold(state, |mut state| async move {
         loop {
             if let Some(chunk) = state.pending.pop_front() {
+                state.trace.dump("downstream.chunk", &chunk);
+                state.handed_off_bytes += chunk.len() as u64;
                 return Some((Ok::<Bytes, Infallible>(chunk), state));
             }
             if state.output_finished {
@@ -348,19 +351,35 @@ pub async fn stream_execution_response(
             state.advance().await;
         }
     }));
+    // 保活只轮询已固定的输出 stream；不能取消并重建 advance/next_event future，
+    // 否则一次心跳就可能丢失正在等待的上游事件或执行终态清理。
+    let body = Body::from_stream(stream::unfold(output, |mut output| async move {
+        let chunk = tokio::select! {
+            biased;
+            chunk = output.next() => chunk?,
+            () = tokio::time::sleep(SSE_KEEPALIVE_INTERVAL) => {
+                Ok(Bytes::from_static(b": keep-alive\n\n"))
+            }
+        };
+        Some((chunk, output))
+    }));
     event_stream_response(body, &response_headers)
 }
 
 fn event_stream_response(body: Body, response_headers: &[ProviderResponseHeader]) -> Response {
-    let mut response = Response::new(body);
+    let mut response = apply_response_headers(Response::new(body), response_headers);
     *response.status_mut() = StatusCode::OK;
     response
         .headers_mut()
         .insert(CONTENT_TYPE, HeaderValue::from_static("text/event-stream"));
+    response.headers_mut().insert(
+        CACHE_CONTROL,
+        HeaderValue::from_static("no-cache, no-transform"),
+    );
     response
         .headers_mut()
-        .insert(CACHE_CONTROL, HeaderValue::from_static("no-cache"));
-    apply_response_headers(response, response_headers)
+        .insert("x-accel-buffering", HeaderValue::from_static("no"));
+    response
 }
 
 fn internal_gateway_response(message: &'static str) -> Response {
@@ -422,12 +441,18 @@ impl Drop for PendingExecution {
         if session.is_finalized() {
             return;
         }
+        session.trace().record(
+            "downstream.cancelled",
+            serde_json::json!({"reason": "response_guard_dropped"}),
+        );
         session.cancel();
         detach_finalize(session);
     }
 }
 
 struct ResponsesStreamState {
+    trace: TraceContext,
+    handed_off_bytes: u64,
     session: Option<Box<dyn ExecutionSession>>,
     encoder: OpenAiResponsesEncoder,
     pending: VecDeque<Bytes>,
@@ -444,6 +469,8 @@ impl ResponsesStreamState {
         connection_guard: Option<Box<dyn ConnectionGuard>>,
     ) -> Self {
         Self {
+            trace: session.trace(),
+            handed_off_bytes: 0,
             session: Some(session),
             encoder,
             pending: initial_frames.into_iter().collect(),
@@ -599,6 +626,11 @@ impl ResponsesStreamState {
 
 impl Drop for ResponsesStreamState {
     fn drop(&mut self) {
+        self.trace.record("downstream.body.closed", serde_json::json!({
+            "handedOffBytes": self.handed_off_bytes,
+            "pendingChunks": self.pending.len(),
+            "outputFinished": self.output_finished, "executionTerminal": self.execution_terminal,
+        }));
         if self.execution_terminal {
             return;
         }

backend/crates/gateway-api/src/openai/responses/mod.rs

@@ -7,9 +7,9 @@ mod response;
 pub mod websocket;
 
 pub use error::{ProtocolError, ProtocolErrorBody, RequestDecodeError, ResponseEncodeError};
+pub(crate) use http::responses;
 pub(super) use http::{PendingExecution, request_client_context};
 pub use http::{collect_execution_response, stream_execution_response};
-pub(crate) use http::{responses, review_responses};
 pub use request::{
     ContinuationIntent, DecodedResponsesRequest, OpenAiRequestHeaders, ResponsesRequestMetadata,
     decode_request_with_headers,

backend/crates/gateway-api/src/openai/responses/request.rs

@@ -13,10 +13,10 @@ use serde_json::{Map, Value};
 use super::error::RequestDecodeError;
 
 const OPENAI_PROTOCOL: &str = "openai";
-const REVIEW_SUBAGENT: &str = "review";
 const OPENAI_SUBAGENT_KEY: &str = "x-openai-subagent";
 const CODEX_TURN_METADATA_KEY: &str = "x-codex-turn-metadata";
 const PASSTHROUGH_HEADERS_CONTEXT_KEY: &str = "opaque_request_headers";
+const DOWNSTREAM_WEBSOCKET_CONNECTION_ID_CONTEXT_KEY: &str = "downstream_websocket_connection_id";
 
 /// Responses 请求进入共享解码内核时的下游传输来源。
 #[derive(Clone, Copy)]
@@ -36,6 +36,7 @@ pub struct OpenAiRequestHeaders {
     include_timing_metrics: Option<String>,
     codex_window_id: Option<String>,
     parent_thread_id: Option<String>,
+    downstream_websocket_connection_id: Option<String>,
 
     conversation_id: Option<String>,
     session_id: Option<String>,
@@ -61,6 +62,7 @@ impl OpenAiRequestHeaders {
             include_timing_metrics: header_string(headers, "x-responsesapi-include-timing-metrics"),
             codex_window_id: header_string(headers, "x-codex-window-id"),
             parent_thread_id: header_string(headers, "x-codex-parent-thread-id"),
+            downstream_websocket_connection_id: None,
             conversation_id: header_string(headers, "conversation-id")
                 .or_else(|| header_string(headers, "conversation_id")),
             session_id: header_string(headers, "session-id")
@@ -75,12 +77,31 @@ impl OpenAiRequestHeaders {
         }
     }
 
-    fn apply_subagent(&self, body: &mut Map<String, Value>, forced_subagent: Option<&str>) {
-        if let Some(subagent) = forced_subagent.or(self.subagent.as_deref()) {
+    /// 绑定代理为当前下游 WebSocket 分配的连接身份。
+    #[must_use]
+    pub(super) fn with_downstream_websocket_connection_id(
+        mut self,
+        connection_id: impl Into<String>,
+    ) -> Self {
+        self.downstream_websocket_connection_id = Some(connection_id.into());
+        self
+    }
+
+    fn apply_subagent(&self, body: &mut Map<String, Value>) {
+        if let Some(subagent) = self.subagent.as_deref() {
             inject_subagent_metadata(body, subagent);
         }
     }
 
+    /// 独立端点只消费会话身份与 turn metadata，不携带 Responses 的连接状态。
+    pub(crate) fn session_context(&self) -> Map<String, Value> {
+        let mut context = Map::new();
+        insert_protocol_context(&mut context, "session_id", self.session_id.as_ref());
+        insert_protocol_context(&mut context, "thread_id", self.thread_id.as_ref());
+        insert_protocol_context(&mut context, "turn_metadata", self.turn_metadata.as_ref());
+        context
+    }
+
     fn protocol_context(
         &self,
         use_websocket: Option<bool>,
@@ -110,6 +131,11 @@ impl OpenAiRequestHeaders {
             "parent_thread_id",
             self.parent_thread_id.as_ref(),
         );
+        insert_protocol_context(
+            &mut context,
+            DOWNSTREAM_WEBSOCKET_CONNECTION_ID_CONTEXT_KEY,
+            self.downstream_websocket_connection_id.as_ref(),
+        );
         insert_protocol_context(
             &mut context,
             "conversation_id",
@@ -301,20 +327,11 @@ pub fn decode_request_with_headers(
     body: &[u8],
     headers: &HeaderMap,
 ) -> Result<DecodedResponsesRequest, RequestDecodeError> {
-    decode_request_inner(body, false, &OpenAiRequestHeaders::from_headers(headers))
-}
-
-/// 解码 `POST /v1/responses/review` 请求并冻结 review subagent 语义。
-pub(super) fn decode_review_request_with_headers(
-    body: &[u8],
-    headers: &HeaderMap,
-) -> Result<DecodedResponsesRequest, RequestDecodeError> {
-    decode_request_inner(body, true, &OpenAiRequestHeaders::from_headers(headers))
+    decode_request_inner(body, &OpenAiRequestHeaders::from_headers(headers))
 }
 
 pub(super) fn decode_request_inner(
     body: &[u8],
-    review: bool,
     request_headers: &OpenAiRequestHeaders,
 ) -> Result<DecodedResponsesRequest, RequestDecodeError> {
     let value =
@@ -322,13 +339,12 @@ pub(super) fn decode_request_inner(
     let Value::Object(object) = value else {
         return Err(RequestDecodeError::ExpectedObject);
     };
-    decode_request_object(object, review, request_headers, RequestDecodeSource::Http)
+    decode_request_object(object, request_headers, RequestDecodeSource::Http)
 }
 
 /// 解码已解析的顶层 object；按下游传输来源恢复连接级协议上下文。
 pub(super) fn decode_request_object(
     mut object: Map<String, Value>,
-    review: bool,
     request_headers: &OpenAiRequestHeaders,
     source: RequestDecodeSource,
 ) -> Result<DecodedResponsesRequest, RequestDecodeError> {
@@ -359,7 +375,7 @@ pub(super) fn decode_request_object(
         .map(|response_id| ContinuationIntent::PreviousResponseId(response_id.to_owned()))
         .unwrap_or(ContinuationIntent::None);
 
-    request_headers.apply_subagent(&mut object, review.then_some(REVIEW_SUBAGENT));
+    request_headers.apply_subagent(&mut object);
     let frame_turn_metadata = match source {
         RequestDecodeSource::Http => None,
         RequestDecodeSource::WebSocketFrame => frame_turn_metadata(&object),
@@ -476,6 +492,8 @@ fn passthrough_header_name(name: &str, connection_headers: &[String]) -> bool {
             // 下游鉴权和账号 cookie 绝不能成为上游账号身份。
             | "authorization"
             | "x-api-key"
+            // Codex 的服务端托管认证标记只用于客户端能力判断，不代表上游身份。
+            | "x-openai-actor-authorization"
             | "cookie"
             | "cookie2"
             | "chatgpt-account-id"

backend/crates/gateway-api/src/openai/responses/websocket/connection.rs

@@ -23,6 +23,7 @@ const OUTBOUND_COMMAND_BUFFER: usize = 32;
 const INBOUND_EVENT_BUFFER: usize = 32;
 const DOWNSTREAM_WRITE_TIMEOUT: Duration = Duration::from_secs(5 * 60);
 const CONNECTION_MAX_AGE: Duration = Duration::from_secs(60 * 60);
+const DOWNSTREAM_PING_INTERVAL: Duration = Duration::from_secs(25);
 
 /// WebSocket pump 的写入与生命周期预算。
 #[derive(Clone, Copy)]
@@ -171,9 +172,27 @@ struct ConnectionStats {
     command_backpressure_count: AtomicU64,
     ping_received_count: AtomicU64,
     pong_written_count: AtomicU64,
+    ping_written_count: AtomicU64,
+    pong_received_count: AtomicU64,
+    last_read_ms: AtomicU64,
+    last_write_ms: AtomicU64,
 }
 
 impl ConnectionStats {
+    fn record_read(&self, opened_at: Instant) {
+        self.last_read_ms.store(
+            u64::try_from(opened_at.elapsed().as_millis()).unwrap_or(u64::MAX),
+            Ordering::Relaxed,
+        );
+    }
+
+    fn record_write(&self, opened_at: Instant) {
+        self.last_write_ms.store(
+            u64::try_from(opened_at.elapsed().as_millis()).unwrap_or(u64::MAX),
+            Ordering::Relaxed,
+        );
+    }
+
     fn observe_command_queue(&self, sender: &mpsc::Sender<ConnectionCommand>) {
         let queued = OUTBOUND_COMMAND_BUFFER
             .saturating_sub(sender.capacity())
@@ -195,6 +214,7 @@ pub struct ResponsesWebSocketConnection {
     expired: Arc<AtomicBool>,
     commands: Option<mpsc::Sender<ConnectionCommand>>,
     incoming: mpsc::Receiver<ConnectionEvent>,
+    exited: oneshot::Receiver<PumpExitReason>,
     pump_task: Option<JoinHandle<()>>,
     stats: Arc<ConnectionStats>,
     config: ConnectionConfig,
@@ -231,7 +251,16 @@ impl ResponsesWebSocketConnection {
 
     /// 等待下一个需要业务层处理的客户端事件。
     pub async fn next_event(&mut self) -> Option<ConnectionEvent> {
-        let event = self.incoming.recv().await;
+        if let Some(reason) = self.exit_reason {
+            return Some(ConnectionEvent::Exited(reason));
+        }
+        let event = tokio::select! {
+            biased;
+            reason = &mut self.exited => {
+                Some(ConnectionEvent::Exited(reason.unwrap_or(PumpExitReason::PumpStopped)))
+            }
+            event = self.incoming.recv() => event,
+        };
         if let Some(ConnectionEvent::Exited(reason)) = event.as_ref() {
             self.exit_reason.get_or_insert(*reason);
         } else if event.is_none() {
@@ -240,6 +269,18 @@ impl ResponsesWebSocketConnection {
         event
     }
 
+    /// 等待连接退出，不消费留给后续串行请求的业务帧。
+    pub async fn wait_for_exit(&mut self) -> PumpExitReason {
+        if let Some(reason) = self.exit_reason {
+            return reason;
+        }
+        let reason = (&mut self.exited)
+            .await
+            .unwrap_or(PumpExitReason::PumpStopped);
+        self.exit_reason = Some(reason);
+        reason
+    }
+
     /// 串行写入文本帧，并等待 pump 确认 transport 写入结果。
     ///
     /// # Errors
@@ -378,10 +419,15 @@ impl ResponsesWebSocketConnection {
     }
 
     pub(super) fn log_summary(&self, request_count: u64) {
+        let connection_age_ms = self.age().as_millis();
+        let read_idle_ms = connection_age_ms
+            .saturating_sub(u128::from(self.stats.last_read_ms.load(Ordering::Relaxed)));
+        let write_idle_ms = connection_age_ms
+            .saturating_sub(u128::from(self.stats.last_write_ms.load(Ordering::Relaxed)));
         tracing::info!(
             websocket_connection_id = %self.connection_id,
             request_count,
-            connection_age_ms = self.age().as_millis(),
+            connection_age_ms,
             pump_exit_reason = self
                 .exit_reason
                 .map_or("unknown", PumpExitReason::as_str),
@@ -395,6 +441,10 @@ impl ResponsesWebSocketConnection {
                 .load(Ordering::Relaxed),
             ping_received_count = self.stats.ping_received_count.load(Ordering::Relaxed),
             pong_written_count = self.stats.pong_written_count.load(Ordering::Relaxed),
+            ping_written_count = self.stats.ping_written_count.load(Ordering::Relaxed),
+            pong_received_count = self.stats.pong_received_count.load(Ordering::Relaxed),
+            read_idle_ms,
+            write_idle_ms,
             "Responses WebSocket disconnected"
         );
     }
@@ -425,10 +475,12 @@ where
     let stats = Arc::new(ConnectionStats::default());
     let (command_tx, command_rx) = mpsc::channel(OUTBOUND_COMMAND_BUFFER);
     let (incoming_tx, incoming_rx) = mpsc::channel(INBOUND_EVENT_BUFFER);
+    let (exit_tx, exit_rx) = oneshot::channel();
     let pump_task = tokio::spawn(run_pump(
         socket,
         command_rx,
         incoming_tx,
+        exit_tx,
         Arc::clone(&connection_id),
         cancellation,
         opened_at,
@@ -442,6 +494,7 @@ where
         expired,
         commands: Some(command_tx),
         incoming: incoming_rx,
+        exited: exit_rx,
         pump_task: Some(pump_task),
         stats,
         config,
@@ -454,6 +507,7 @@ async fn run_pump<S, E>(
     mut socket: S,
     mut commands: mpsc::Receiver<ConnectionCommand>,
     incoming: mpsc::Sender<ConnectionEvent>,
+    exited: oneshot::Sender<PumpExitReason>,
     connection_id: Arc<str>,
     cancellation: CancellationToken,
     opened_at: Instant,
@@ -467,6 +521,12 @@ async fn run_pump<S, E>(
     let deadline = tokio::time::sleep_until(opened_at + config.max_age);
     tokio::pin!(deadline);
     let mut deadline_elapsed = false;
+    let mut heartbeat = tokio::time::interval_at(
+        opened_at + DOWNSTREAM_PING_INTERVAL,
+        DOWNSTREAM_PING_INTERVAL,
+    );
+    heartbeat.set_missed_tick_behavior(tokio::time::MissedTickBehavior::Skip);
+    let mut ping_sequence = 0_u64;
     let reason = loop {
         tokio::select! {
             biased;
@@ -474,8 +534,13 @@ async fn run_pump<S, E>(
             () = &mut deadline, if !deadline_elapsed => {
                 deadline_elapsed = true;
                 expired.store(true, Ordering::Release);
-                if let Err(reason) = emit_incoming(&incoming, ConnectionEvent::Expired) {
-                    break reason;
+                // 满队列本身已能唤醒空闲协调层；到期标志仍阻止启动下一轮。
+                // 不能因无法追加 Expired 通知而中断正在收尾的响应。
+                match incoming.try_send(ConnectionEvent::Expired) {
+                    Ok(()) | Err(mpsc::error::TrySendError::Full(_)) => {}
+                    Err(mpsc::error::TrySendError::Closed(_)) => {
+                        break PumpExitReason::CoordinatorDropped;
+                    }
                 }
             }
             command = commands.recv() => {
@@ -500,6 +565,9 @@ async fn run_pump<S, E>(
                     ConnectionWriteError::Transport { message }
                 });
                 let failed = result.is_err();
+                if !failed {
+                    stats.record_write(opened_at);
+                }
                 let _ = acknowledged.send(result);
                 if failed {
                     break PumpExitReason::WriteError;
@@ -508,49 +576,84 @@ async fn run_pump<S, E>(
                     break PumpExitReason::ServerClose;
                 }
             }
-            message = socket.next() => match message {
-                Some(Ok(Message::Text(payload))) => {
-                    if let Err(reason) = emit_incoming(&incoming, ConnectionEvent::Text(payload.to_string())) {
-                        break reason;
+            // 官方 Codex WsStream 在独立 pump 中回复 Pong，且不将控制帧交给业务流。
+            // 这里只为下游链路保活，不设置 Pong deadline，也不延长业务请求预算。
+            _ = heartbeat.tick() => {
+                ping_sequence = ping_sequence.wrapping_add(1);
+                let ping = Message::Ping(ping_sequence.to_be_bytes().to_vec().into());
+                let result = tokio::select! {
+                    biased;
+                    () = cancellation.cancelled() => break PumpExitReason::LifecycleShutdown,
+                    result = timeout(config.write_timeout, socket.send(ping)) => result,
+                };
+                match result {
+                    Ok(Ok(())) => {
+                        stats.ping_written_count.fetch_add(1, Ordering::Relaxed);
+                        stats.record_write(opened_at);
                     }
-                }
-                Some(Ok(Message::Binary(_))) => {
-                    if let Err(reason) = emit_incoming(&incoming, ConnectionEvent::Binary) {
-                        break reason;
+                    Ok(Err(error)) => {
+                        tracing::info!(
+                            websocket_connection_id = %connection_id,
+                            error = %error,
+                            "Responses WebSocket Ping write failed"
+                        );
+                        break PumpExitReason::WriteError;
                     }
+                    Err(_) => break PumpExitReason::WriteTimeout,
                 }
-                Some(Ok(Message::Ping(payload))) => {
-                    stats.ping_received_count.fetch_add(1, Ordering::Relaxed);
-                    match timeout(config.write_timeout, socket.send(Message::Pong(payload))).await {
-                        Ok(Ok(())) => {
-                            stats.pong_written_count.fetch_add(1, Ordering::Relaxed);
+            }
+            message = socket.next() => {
+                if matches!(&message, Some(Ok(_))) {
+                    stats.record_read(opened_at);
+                }
+                match message {
+                    Some(Ok(Message::Text(payload))) => {
+                        if let Err(reason) = emit_incoming(&incoming, ConnectionEvent::Text(payload.to_string())) {
+                            break reason;
                         }
-                        Ok(Err(error)) => {
-                            tracing::info!(
-                                websocket_connection_id = %connection_id,
-                                error = %error,
-                                "Responses WebSocket Pong write failed"
-                            );
-                            break PumpExitReason::WriteError;
-                        }
-                        Err(_) => break PumpExitReason::WriteTimeout,
                     }
+                    Some(Ok(Message::Binary(_))) => {
+                        if let Err(reason) = emit_incoming(&incoming, ConnectionEvent::Binary) {
+                            break reason;
+                        }
+                    }
+                    Some(Ok(Message::Ping(payload))) => {
+                        stats.ping_received_count.fetch_add(1, Ordering::Relaxed);
+                        match timeout(config.write_timeout, socket.send(Message::Pong(payload))).await {
+                            Ok(Ok(())) => {
+                                stats.pong_written_count.fetch_add(1, Ordering::Relaxed);
+                                stats.record_write(opened_at);
+                            }
+                            Ok(Err(error)) => {
+                                tracing::info!(
+                                    websocket_connection_id = %connection_id,
+                                    error = %error,
+                                    "Responses WebSocket Pong write failed"
+                                );
+                                break PumpExitReason::WriteError;
+                            }
+                            Err(_) => break PumpExitReason::WriteTimeout,
+                        }
+                    }
+                    Some(Ok(Message::Pong(_))) => {
+                        stats.pong_received_count.fetch_add(1, Ordering::Relaxed);
+                    }
+                    Some(Ok(Message::Close(_))) => break PumpExitReason::ClientClose,
+                    Some(Err(error)) => {
+                        tracing::info!(
+                            websocket_connection_id = %connection_id,
+                            error = %error,
+                            "Responses WebSocket receive failed"
+                        );
+                        break PumpExitReason::ReadError;
+                    }
+                    None => break PumpExitReason::PeerEof,
                 }
-                Some(Ok(Message::Pong(_))) => {}
-                Some(Ok(Message::Close(_))) => break PumpExitReason::ClientClose,
-                Some(Err(error)) => {
-                    tracing::info!(
-                        websocket_connection_id = %connection_id,
-                        error = %error,
-                        "Responses WebSocket receive failed"
-                    );
-                    break PumpExitReason::ReadError;
-                }
-                None => break PumpExitReason::PeerEof,
             },
         }
     };
-    let _ = incoming.try_send(ConnectionEvent::Exited(reason));
+    // 退出不能排在待执行请求之后，也不能因业务队列已满而丢失。
+    let _ = exited.send(reason);
     tracing::debug!(
         websocket_connection_id = %connection_id,
         pump_exit_reason = reason.as_str(),

backend/crates/gateway-api/src/openai/responses/websocket/forward.rs

@@ -13,12 +13,10 @@ use crate::openai::error::{gateway_error_contract, gateway_error_from_engine};
 
 use super::{
     super::{DecodedResponsesRequest, OpenAiResponsesEncoder, PendingExecution, ProtocolErrorBody},
-    connection::{ConnectionEvent, FramePhase, ResponsesWebSocketConnection, WriteContext},
+    connection::{FramePhase, ResponsesWebSocketConnection, WriteContext},
     protocol::{error_event, response_metadata_event},
 };
 
-const ACTIVE_RESPONSE_VIOLATION: &str = "Only one response.create may be active per connection";
-
 #[derive(Clone, Copy, PartialEq, Eq)]
 pub(super) enum ForwardOutcome {
     Continue,
@@ -66,29 +64,20 @@ pub(super) async fn forward_execution(
         );
         return send_gateway_error(connection, &error, &request_id).await;
     }
-    let first = loop {
-        match next_active_input(connection, &mut execution).await {
-            ActiveInput::Event(Ok(Some(event))) => break event,
-            ActiveInput::Event(Ok(None)) => {
-                let error = GatewayError::new(
-                    GatewayErrorKind::Internal,
-                    "gateway response ended before its first event",
-                );
-                return send_gateway_error(connection, &error, &request_id).await;
-            }
-            ActiveInput::Event(Err(error)) => {
-                let error = gateway_error_from_engine(&error);
-                return send_gateway_error(connection, &error, &request_id).await;
-            }
-            ActiveInput::Control => continue,
-            ActiveInput::Disconnect => return ForwardOutcome::Disconnect,
-            ActiveInput::ProtocolViolation => {
-                connection
-                    .close_policy(ACTIVE_RESPONSE_VIOLATION, Some(&request_id))
-                    .await;
-                return ForwardOutcome::Disconnect;
-            }
+    let first = match next_active_input(connection, &mut execution).await {
+        ActiveInput::Event(Ok(Some(event))) => event,
+        ActiveInput::Event(Ok(None)) => {
+            let error = GatewayError::new(
+                GatewayErrorKind::Internal,
+                "gateway response ended before its first event",
+            );
+            return send_gateway_error(connection, &error, &request_id).await;
         }
+        ActiveInput::Event(Err(error)) => {
+            return send_initial_engine_error(connection, &mut execution, &error, &request_id)
+                .await;
+        }
+        ActiveInput::Disconnect => return ForwardOutcome::Disconnect,
     };
     let requirement = first.commit_requirement();
     let mut first = first.into_provider_events();
@@ -259,18 +248,35 @@ pub(super) async fn forward_execution(
                 let error = gateway_error_from_engine(&error);
                 return send_gateway_error(connection, &error, &request_id).await;
             }
-            ActiveInput::Control => {}
             ActiveInput::Disconnect => return ForwardOutcome::Disconnect,
-            ActiveInput::ProtocolViolation => {
-                connection
-                    .close_policy(ACTIVE_RESPONSE_VIOLATION, Some(&request_id))
-                    .await;
-                return ForwardOutcome::Disconnect;
-            }
         }
     }
 }
 
+async fn send_initial_engine_error(
+    connection: &mut ResponsesWebSocketConnection,
+    execution: &mut PendingExecution,
+    error: &EngineError,
+    request_id: &Arc<str>,
+) -> ForwardOutcome {
+    let response_headers = execution
+        .session_mut()
+        .map(|session| session.response_headers().to_vec())
+        .unwrap_or_default();
+    if !response_headers.is_empty()
+        && !send_metadata(
+            connection,
+            request_id,
+            response_metadata_event(request_id, &response_headers),
+        )
+        .await
+    {
+        return ForwardOutcome::Disconnect;
+    }
+    let error = gateway_error_from_engine(error);
+    send_gateway_error(connection, &error, request_id).await
+}
+
 fn commit_connection_replay(
     replay: &mut ConnectionReplaySnapshot,
     encoder: &OpenAiResponsesEncoder,
@@ -286,50 +292,39 @@ async fn confirm_completed_execution(
     execution: &mut PendingExecution,
     request_id: &Arc<str>,
 ) -> Result<(), ForwardOutcome> {
-    loop {
-        match next_active_input(connection, execution).await {
-            ActiveInput::Event(Ok(None))
-                if execution
-                    .session_mut()
-                    .is_some_and(|session| session.is_finalized()) =>
-            {
-                return Ok(());
-            }
-            ActiveInput::Event(Ok(None)) => {
-                let error = GatewayError::new(
-                    GatewayErrorKind::Internal,
-                    "gateway response was not finalized after its terminal event",
-                );
-                return Err(send_gateway_error(connection, &error, request_id).await);
-            }
-            ActiveInput::Event(Ok(Some(_))) => {
-                let error = GatewayError::new(
-                    GatewayErrorKind::Internal,
-                    "gateway response continued after its terminal event",
-                );
-                return Err(send_gateway_error(connection, &error, request_id).await);
-            }
-            ActiveInput::Event(Err(error)) => {
-                let error = gateway_error_from_engine(&error);
-                return Err(send_gateway_error(connection, &error, request_id).await);
-            }
-            ActiveInput::Control => {}
-            ActiveInput::Disconnect => return Err(ForwardOutcome::Disconnect),
-            ActiveInput::ProtocolViolation => {
-                connection
-                    .close_policy(ACTIVE_RESPONSE_VIOLATION, Some(request_id))
-                    .await;
-                return Err(ForwardOutcome::Disconnect);
-            }
+    match next_active_input(connection, execution).await {
+        ActiveInput::Event(Ok(None))
+            if execution
+                .session_mut()
+                .is_some_and(|session| session.is_finalized()) =>
+        {
+            Ok(())
         }
+        ActiveInput::Event(Ok(None)) => {
+            let error = GatewayError::new(
+                GatewayErrorKind::Internal,
+                "gateway response was not finalized after its terminal event",
+            );
+            Err(send_gateway_error(connection, &error, request_id).await)
+        }
+        ActiveInput::Event(Ok(Some(_))) => {
+            let error = GatewayError::new(
+                GatewayErrorKind::Internal,
+                "gateway response continued after its terminal event",
+            );
+            Err(send_gateway_error(connection, &error, request_id).await)
+        }
+        ActiveInput::Event(Err(error)) => {
+            let error = gateway_error_from_engine(&error);
+            Err(send_gateway_error(connection, &error, request_id).await)
+        }
+        ActiveInput::Disconnect => Err(ForwardOutcome::Disconnect),
     }
 }
 
 enum ActiveInput {
     Event(Result<Option<CoordinatedEvent>, EngineError>),
-    Control,
     Disconnect,
-    ProtocolViolation,
 }
 
 async fn next_active_input(
@@ -339,15 +334,17 @@ async fn next_active_input(
     let Some(session) = execution.session_mut() else {
         return ActiveInput::Disconnect;
     };
+    // 与 Codex stream_request 的连接锁一致：本轮结束前不消费下一条请求。
+    // pump 继续接收有界业务帧和处理 Ping/Pong；退出通过独立通知取消本轮。
     tokio::select! {
-        event = session.next_event() => ActiveInput::Event(event),
-        message = connection.next_event() => match message {
-            Some(ConnectionEvent::Expired) => ActiveInput::Control,
-            Some(ConnectionEvent::Text(_) | ConnectionEvent::Binary) => {
-                ActiveInput::ProtocolViolation
-            }
-            Some(ConnectionEvent::Exited(_)) | None => ActiveInput::Disconnect,
+        biased;
+        _ = connection.wait_for_exit() => {
+            session.trace().record("downstream.cancelled", serde_json::json!({
+                "reason": "websocket_connection_exit", "connectionId": connection.id(),
+            }));
+            ActiveInput::Disconnect
         },
+        event = session.next_event() => ActiveInput::Event(event),
     }
 }
 
@@ -459,6 +456,7 @@ fn log_terminal_write_success(
     provider_terminal_to_write: std::time::Duration,
 ) {
     tracing::info!(
+        target: "request_trace", stage = "downstream.terminal.written",
         websocket_connection_id = connection.id(),
         request_id = %request_id,
         provider_terminal_to_terminal_write_ms = provider_terminal_to_write.as_millis(),
@@ -473,6 +471,7 @@ fn log_terminal_write_failure(
     provider_terminal_to_write: std::time::Duration,
 ) {
     tracing::info!(
+        target: "request_trace", stage = "downstream.terminal.write_failed",
         websocket_connection_id = connection.id(),
         request_id = %request_id,
         provider_terminal_to_terminal_write_ms = provider_terminal_to_write.as_millis(),

backend/crates/gateway-api/src/openai/responses/websocket/mod.rs

@@ -19,6 +19,7 @@ use axum::{
     response::{IntoResponse, Response},
 };
 use gateway_core::{
+    diagnostics::{TraceContext, diagnostic_json},
     engine::execution::{AuthenticatedClient, ClientTransport},
     lifecycle::{ConnectionGuard, ConnectionLifecycle},
 };
@@ -60,12 +61,14 @@ pub(crate) async fn responses_websocket(
         &headers,
         connect_info.map(|Extension(ConnectInfo(address))| address),
     );
+    let request_headers = OpenAiRequestHeaders::from_headers(&headers);
     ResponsesWebSocketAdapter::new(service).upgrade_with_client_context(
         websocket,
         client,
         client_ip,
         user_agent,
-        OpenAiRequestHeaders::from_headers(&headers),
+        request_headers,
+        headers,
     )
 }
 
@@ -89,15 +92,24 @@ impl ResponsesWebSocketAdapter {
         client_ip: Option<IpAddr>,
         user_agent: Option<String>,
         request_headers: OpenAiRequestHeaders,
+        raw_headers: HeaderMap,
     ) -> Response {
         let connection_guard = match self.service.try_register_connection() {
             Ok(guard) => guard,
             Err(_) => return runtime_unavailable_response().into_response(),
         };
+        let connection_id = self.service.next_request_id().replacen("req_", "ws_", 1);
+        TraceContext::new(&connection_id).headers(
+            "client.connection.headers",
+            serde_json::json!({"transport": "websocket", "method": "GET", "path": "/v1/responses"}),
+            raw_headers
+                .iter()
+                .map(|(name, value)| (name.as_str(), value.as_bytes())),
+        );
         let session = ResponsesWebSocketSession {
             service: self.service.clone(),
             client,
-            connection_id: self.service.next_request_id().replacen("req_", "ws_", 1),
+            connection_id,
             client_ip,
             user_agent,
             request_headers,
@@ -143,6 +155,8 @@ async fn serve_responses_websocket(socket: WebSocket, session: ResponsesWebSocke
     );
     let _connection_guard = connection_guard;
     let cancellation = lifecycle.cancellation();
+    let request_headers =
+        request_headers.with_downstream_websocket_connection_id(connection_id.clone());
     let mut connection = ResponsesWebSocketConnection::new(socket, connection_id, cancellation);
     let mut request_count = 0_u64;
     let mut replay = ConnectionReplaySnapshot::default();
@@ -172,11 +186,12 @@ async fn serve_responses_websocket(socket: WebSocket, session: ResponsesWebSocke
         let decoded = match decode_response_create_with_context(&payload, &request_headers) {
             Ok(decoded) => decoded.with_client_context(client_ip, user_agent.clone()),
             Err(error) => {
-                tracing::info!(
-                    websocket_connection_id = connection.id(),
-                    request_id = %correlation_id,
-                    error = %error,
-                    "Responses WebSocket request rejected"
+                trace_rejected_request(
+                    &correlation_id,
+                    connection.id(),
+                    &payload,
+                    "decode",
+                    &error.to_string(),
                 );
                 if send_protocol_error(
                     &mut connection,
@@ -195,6 +210,13 @@ async fn serve_responses_websocket(socket: WebSocket, session: ResponsesWebSocke
         let decoded = replay.prepare(decoded);
         // deadline 与 Text 可能同时就绪；在任何上游执行开始前再次封住该竞争窗口。
         if connection.is_expired() {
+            trace_rejected_request(
+                &correlation_id,
+                connection.id(),
+                &payload,
+                "connection_expired",
+                "",
+            );
             expire_connection(&mut connection).await;
             break;
         }
@@ -209,6 +231,13 @@ async fn serve_responses_websocket(socket: WebSocket, session: ResponsesWebSocke
         {
             Ok(started) => started,
             Err(error) => {
+                trace_rejected_request(
+                    &correlation_id,
+                    connection.id(),
+                    &payload,
+                    "start",
+                    &error.to_string(),
+                );
                 if send_gateway_error(&mut connection, &error, &correlation_id).await
                     == ForwardOutcome::Disconnect
                 {
@@ -217,6 +246,14 @@ async fn serve_responses_websocket(socket: WebSocket, session: ResponsesWebSocke
                 continue;
             }
         };
+        started.session.trace().record("client.connection", serde_json::json!({
+            "transport": "websocket", "connectionId": connection.id(), "correlationId": correlation_id.as_ref(),
+            "requestIndex": request_count,
+        }));
+        started
+            .session
+            .trace()
+            .capture("client.request.body", payload.as_bytes());
 
         if forward_execution(&mut connection, started, &mut replay).await
             == ForwardOutcome::Disconnect
@@ -232,6 +269,28 @@ async fn serve_responses_websocket(socket: WebSocket, session: ResponsesWebSocke
     connection.log_summary(request_count);
 }
 
+// 尚未建立模型请求的拒绝也保留原文入口，用返回给客户端的 correlation ID 检索。
+fn trace_rejected_request(
+    correlation_id: &str,
+    connection_id: &str,
+    payload: &str,
+    phase: &'static str,
+    error: &str,
+) {
+    let trace = TraceContext::new(correlation_id);
+    trace.record(
+        "client.connection",
+        serde_json::json!({"connectionId": connection_id}),
+    );
+    trace.capture("client.request.body", payload.as_bytes());
+    trace.record(
+        "client.request.rejected",
+        serde_json::json!({
+            "phase": phase, "detail": diagnostic_json(&serde_json::json!({"message": error})),
+        }),
+    );
+}
+
 async fn expire_connection(connection: &mut ResponsesWebSocketConnection) {
     if connection
         .send_text(

backend/crates/gateway-api/src/openai/responses/websocket/protocol.rs

@@ -43,7 +43,6 @@ fn decode_response_create_inner(
     }
     super::super::request::decode_request_object(
         body,
-        false,
         request_headers,
         RequestDecodeSource::WebSocketFrame,
     )

backend/crates/gateway-api/src/openai/router.rs

@@ -8,8 +8,9 @@ use axum::{
 
 use super::{
     images::{image_edits, image_generations},
-    models::{model_catalog, model_detail, model_info, models},
-    responses::{responses, responses_websocket, review_responses},
+    models::{model_detail, models},
+    responses::{responses, responses_websocket},
+    search::standalone_search,
 };
 
 use crate::ApiState;
@@ -19,11 +20,9 @@ pub(crate) fn router() -> Router<ApiState> {
     Router::new()
         .route("/v1/images/generations", post(image_generations))
         .route("/v1/images/edits", post(image_edits))
+        .route("/v1/alpha/search", post(standalone_search))
         .route("/v1/responses", get(responses_websocket).post(responses))
-        .route("/v1/responses/review", post(review_responses))
         .route("/v1/models", get(models))
-        .route("/v1/models/catalog", get(model_catalog))
-        .route("/v1/models/{model_id}/info", get(model_info))
         // 官方 OpenAI 模型详情合同使用 path ID；它不属于 Admin API 约束。
         .route("/v1/models/{model_id}", get(model_detail))
         // OpenAI 数据面正文属于客户端/上游协议；代理不能用私有大小上限提前拒绝

backend/crates/gateway-api/src/openai/search/http.rs

@@ -0,0 +1,67 @@
+//! Codex standalone search 非流式 HTTP adapter。
+
+use std::net::SocketAddr;
+
+use axum::{
+    body::Bytes,
+    extract::{Extension, State, connect_info::ConnectInfo},
+    http::HeaderMap,
+    response::Response,
+};
+use gateway_core::error::{GatewayError, GatewayErrorKind};
+use gateway_core::operation::{Operation, RawJsonPayload, StandaloneSearchRequest};
+
+use crate::ApiState;
+use crate::openai::{
+    auth::{authenticate_client, client_access_error_response},
+    endpoint::collect_raw_json_response,
+    error::gateway_error_response,
+    responses::{OpenAiRequestHeaders, request_client_context},
+};
+
+const OPENAI_PROTOCOL: &str = "openai";
+
+/// `POST /v1/alpha/search`。
+pub(crate) async fn standalone_search(
+    State(state): State<ApiState>,
+    connect_info: Option<Extension<ConnectInfo<SocketAddr>>>,
+    headers: HeaderMap,
+    body: Bytes,
+) -> Response {
+    let service = state.openai();
+    let client = match authenticate_client(service, &headers) {
+        Ok(client) => client,
+        Err(error) => return client_access_error_response(error),
+    };
+    let (client_ip, user_agent) = request_client_context(
+        &headers,
+        connect_info.map(|Extension(ConnectInfo(address))| address),
+    );
+    let operation = match search_operation(body, &headers) {
+        Ok(operation) => operation,
+        Err(error) => return gateway_error_response(&error),
+    };
+    let started = match service
+        .start_provider_endpoint(client, operation, client_ip, user_agent, "/v1/alpha/search")
+        .await
+    {
+        Ok(started) => started,
+        Err(error) => return gateway_error_response(&error),
+    };
+    collect_raw_json_response(started).await
+}
+
+fn search_operation(body: Bytes, headers: &HeaderMap) -> Result<Operation, GatewayError> {
+    let context = OpenAiRequestHeaders::from_headers(headers).session_context();
+    let payload = RawJsonPayload::new(OPENAI_PROTOCOL, body)
+        .map_err(|_| {
+            GatewayError::new(
+                GatewayErrorKind::Internal,
+                "OpenAI protocol identifier is invalid",
+            )
+        })?
+        .with_context(context);
+    Ok(Operation::Search(StandaloneSearchRequest::from_raw_json(
+        payload,
+    )))
+}

backend/crates/gateway-api/src/openai/search/mod.rs

@@ -0,0 +1,5 @@
+//! Codex standalone search HTTP adapter。
+
+mod http;
+
+pub(crate) use http::standalone_search;

backend/crates/gateway-api/src/openai/service.rs

@@ -106,7 +106,7 @@ impl OpenAiService {
             .await
     }
 
-    pub(crate) async fn start_image(
+    pub(crate) async fn start_provider_endpoint(
         &self,
         client: AuthenticatedClient,
         operation: gateway_core::operation::Operation,

backend/crates/gateway-api/tests/admin/accounts/mod.rs

@@ -348,6 +348,8 @@ mod response {
             output_tokens_display: "-".to_owned(),
             cached_tokens: None,
             cached_tokens_display: "-".to_owned(),
+            reasoning_tokens: None,
+            reasoning_tokens_display: "-".to_owned(),
             image_input_tokens: None,
             image_input_tokens_display: "-".to_owned(),
             image_output_tokens: None,
@@ -374,6 +376,8 @@ mod response {
         let value = serde_json::to_value(view).expect("serialize account usage");
         assert!(value["inputTokens"].is_null());
         assert!(value["totalTokens"].is_null());
+        assert!(value["reasoningTokens"].is_null());
+        assert_eq!(value["reasoningTokensDisplay"], "-");
         assert_eq!(value["createdTokensDisplay"], "-");
     }
 
@@ -752,3 +756,60 @@ mod actions {
         );
     }
 }
+
+mod import_settings {
+    use gateway_api::admin::accounts::{AccountImportRequest, CompleteAccountAuthorizationRequest};
+    use serde_json::json;
+
+    #[test]
+    fn import_and_oauth_apply_the_same_settings_validation() {
+        for (field, value) in [
+            ("concurrencyLimit", json!(0)),
+            ("concurrencyLimit", json!(4_294_967_296_u64)),
+            ("weight", json!(0)),
+            ("weight", json!(101)),
+            ("groupIds", json!(["invalid-group"])),
+        ] {
+            let mut settings =
+                json!({"enabled": false, "concurrencyLimit": null, "weight": 1, "groupIds": []});
+            settings[field] = value;
+            let import: AccountImportRequest = serde_json::from_value(
+                json!({"provider": "openai", "data": {}, "settings": settings}),
+            )
+            .expect("import request");
+            let oauth: CompleteAccountAuthorizationRequest = serde_json::from_value(json!({"provider": "xai", "flowId": "flow-test", "callbackUrl": "code", "settings": settings})).expect("OAuth request");
+            assert_eq!(
+                import.validate().expect_err("invalid settings").field(),
+                field
+            );
+            assert_eq!(
+                oauth.validate().expect_err("invalid settings").field(),
+                field
+            );
+        }
+    }
+
+    #[test]
+    fn import_settings_require_a_complete_explicit_configuration() {
+        let settings =
+            json!({"enabled": false, "concurrencyLimit": null, "weight": 100, "groupIds": []});
+        let request: AccountImportRequest =
+            serde_json::from_value(json!({"provider": "openai", "data": {}, "settings": settings}))
+                .expect("settings");
+        assert!(request.validate().is_ok());
+        for field in ["enabled", "concurrencyLimit", "weight", "groupIds"] {
+            let mut incomplete = settings.clone();
+            incomplete
+                .as_object_mut()
+                .expect("settings object")
+                .remove(field);
+            assert!(
+                serde_json::from_value::<AccountImportRequest>(
+                    json!({"provider": "openai", "data": {}, "settings": incomplete})
+                )
+                .is_err(),
+                "missing {field}"
+            );
+        }
+    }
+}

backend/crates/gateway-api/tests/admin/client_keys.rs

@@ -10,6 +10,46 @@ use serde_json::json;
 
 use super::{AdminTestFixture, AdminTestState};
 
+#[test]
+fn budget_inputs_preserve_decimal_precision_and_omitted_updates() {
+    let payload = json!({"name": "budget", "groupIds": [], "maxConcurrency": 3,
+        "requestsPerMinute": 0, "dailyLimitUsd": "0.1234567891", "weeklyLimitUsd": "15"});
+    let command = serde_json::from_value::<CreateClientKeyRequest>(payload.clone())
+        .unwrap()
+        .into_command()
+        .unwrap();
+    assert_eq!(command.budget.daily_usd.canonical(), "0.1234567891");
+    assert_eq!(command.budget.weekly_usd.canonical(), "15");
+    assert_eq!(command.limits.max_concurrency, 3);
+    for field in ["dailyLimitUsd", "weeklyLimitUsd"] {
+        for invalid in ["-1", "NaN", "1e3", "10000000000", "0.00000000001", ""] {
+            let mut payload = payload.clone();
+            payload[field] = json!(invalid);
+            assert_eq!(
+                serde_json::from_value::<CreateClientKeyRequest>(payload)
+                    .unwrap()
+                    .into_command()
+                    .unwrap_err()
+                    .field(),
+                field
+            );
+        }
+    }
+    let mut update = payload;
+    update["id"] = json!("key_budget");
+    update.as_object_mut().unwrap().remove("dailyLimitUsd");
+    update["weeklyLimitUsd"] = json!("0");
+    let command = serde_json::from_value::<UpdateClientKeyRequest>(update)
+        .unwrap()
+        .into_command()
+        .unwrap();
+    assert_eq!(command.daily_limit_usd, None);
+    assert_eq!(
+        command.weekly_limit_usd,
+        Some(gateway_core::metering::Decimal::ZERO)
+    );
+}
+
 #[test]
 fn client_key_queries_should_reject_unknown_zero_and_oversized_fields() {
     let unknown = serde_json::from_value::<ListClientKeysQuery>(json!({ "other": true }));
@@ -207,6 +247,7 @@ fn client_key_responses_should_keep_shape_and_redact_creation_debug() {
         .single()
         .expect("valid time");
     let view = ClientKeyView::from(gateway_admin::model::client_keys::ClientKeyRecord {
+        budget: Default::default(),
         id: gateway_core::policy::ClientApiKeyId::new("key_visible").expect("Client Key ID"),
         name: "visible".to_owned(),
         label: None,
@@ -238,6 +279,10 @@ fn client_key_responses_should_keep_shape_and_redact_creation_debug() {
     assert_eq!(list["items"][0]["requestsPerMinute"], 60);
     assert!(list["items"][0].get("tokensPerMinute").is_none());
     assert!(list["items"][0].get("policyJson").is_none());
+    assert_eq!(list["items"][0]["dailyLimitUsd"], "0");
+    assert_eq!(list["items"][0]["weeklyLimitUsd"], "0");
+    assert_eq!(list["items"][0]["dailyUsedUsd"], "0");
+    assert!(list["items"][0].get("unresolvedRequests").is_none());
     assert_eq!(
         DateTime::parse_from_rfc3339(
             list["items"][0]["lastUsedAt"]

backend/crates/gateway-api/tests/admin/mod.rs

@@ -640,6 +640,7 @@ impl ClientKeyStore for MemoryClientKeyStore {
         let now = Utc::now();
         Ok(Some(ClientKeySecret::new(
             ClientKeyRecord {
+                budget: Default::default(),
                 id: id.clone(),
                 name: "revealed".to_owned(),
                 label: None,
@@ -875,13 +876,14 @@ impl ObservabilityStore for UnusedStore {
         Err(unavailable("usage trend"))
     }
 
-    async fn usage_calculated_billing_facts(
+    fn usage_calculated_billing_facts(
         &self,
         _: TimeRange,
         _: UsageFilter,
-    ) -> AdminStoreResult<Vec<gateway_admin::model::observability::UsageCalculatedBillingFact>>
-    {
-        Err(unavailable("usage billing facts"))
+    ) -> gateway_admin::ports::store::UsageCalculatedBillingStream<'_> {
+        Box::pin(futures::stream::once(async {
+            Err(unavailable("usage billing facts"))
+        }))
     }
 
     async fn list_usage_records(&self, query: UsageQuery) -> AdminStoreResult<UsagePage> {

backend/crates/gateway-api/tests/admin/observability/response.rs

@@ -64,6 +64,7 @@ fn dashboard_account_usage_should_keep_daily_request_timeline() {
         authentication_kind: "oauth".to_owned(),
         email: "account@example.com".to_owned(),
         plan_type: Some("free".to_owned()),
+        plan_type_display: "Free".to_owned(),
         tokens: "—".to_owned(),
         request_count: 3,
         request_buckets: vec![DashboardAccountRequestBucketView {
@@ -71,6 +72,9 @@ fn dashboard_account_usage_should_keep_daily_request_timeline() {
             request_count: 3,
         }],
         quota_used_percent: None,
+        usage_window: None,
+        metric_label: "次数".to_owned(),
+        metric_value: "3".to_owned(),
         last_used: "刚刚".to_owned(),
     })
     .expect("dashboard account usage");
@@ -426,6 +430,8 @@ async fn usage_detail_should_keep_attempt_snapshot_contract() {
         .lock()
         .expect("usage detail")
         .replace(UsageDetail {
+            trace: None,
+            related_requests: Vec::new(),
             request: usage_record_with_account(
                 "req_detail",
                 "acct_snap_a",
@@ -563,7 +569,6 @@ async fn ops_errors_should_keep_account_label_and_authentication_contract() {
             raw_upstream_error: Some(
                 r#"{"error":{"code":"upstream","message":"raw upstream marker"}}"#.to_owned(),
             ),
-            occurrence_count: 1,
             client_ip: Some("203.0.113.8".to_owned()),
             user_agent: Some("codex-cli/0.144.0".to_owned()),
             reasoning_effort: Some("medium".to_owned()),
@@ -915,6 +920,22 @@ async fn usage_route_should_expose_table_facts_without_detail_payload() {
             compact: true,
             started_at: Utc::now(),
         });
+    {
+        let mut records = fixture.usage_records.lock().expect("usage records");
+        for source in ["calculated", "provider_reported"] {
+            let mut image = records[0].clone();
+            image.id = format!("image_{source}");
+            image.endpoint = "/v1/images/generations".to_owned();
+            image.provider_kind = Some("openai".to_owned());
+            image.requested_model_id = Some("gpt-image-2".to_owned());
+            image.upstream_model_id = None;
+            image.billing = Some(UsageBilling::Total {
+                source: source.to_owned(),
+                total: usd("0.00696"),
+            });
+            records.push(image);
+        }
+    }
     let response = observability::router::<AdminTestState>()
         .with_state(fixture.state())
         .oneshot(
@@ -1012,4 +1033,12 @@ async fn usage_route_should_expose_table_facts_without_detail_payload() {
         })
     );
     assert!(value["data"]["items"][0].get("metadata").is_none());
+    assert_eq!(
+        value["data"]["items"][1]["billing"]["totalAmountDisplay"],
+        "≈ $0.007"
+    );
+    assert_eq!(
+        value["data"]["items"][2]["billing"]["totalAmountDisplay"],
+        "$0.007"
+    );
 }

backend/crates/gateway-api/tests/architecture.rs

@@ -61,6 +61,7 @@ fn source_tree_should_match_frozen_machine_manifest() {
         "src/openai/images/mod.rs",
         "src/openai/mod.rs",
         "src/openai/models.rs",
+        "src/openai/endpoint.rs",
         "src/openai/responses/error.rs",
         "src/openai/responses/http.rs",
         "src/openai/responses/mod.rs",
@@ -71,6 +72,8 @@ fn source_tree_should_match_frozen_machine_manifest() {
         "src/openai/responses/websocket/mod.rs",
         "src/openai/responses/websocket/protocol.rs",
         "src/openai/router.rs",
+        "src/openai/search/http.rs",
+        "src/openai/search/mod.rs",
         "src/openai/service.rs",
     ];
     expected.sort_unstable();
@@ -104,12 +107,14 @@ fn test_tree_should_match_frozen_rust_mirror() {
         "tests/openai/images/mod.rs",
         "tests/openai/mod.rs",
         "tests/openai/models.rs",
+        "tests/openai/endpoint.rs",
         "tests/openai/responses/http.rs",
         "tests/openai/responses/mod.rs",
         "tests/openai/responses/websocket/connection.rs",
         "tests/openai/responses/websocket/mod.rs",
         "tests/openai/responses/websocket/protocol.rs",
         "tests/openai/router.rs",
+        "tests/openai/search/mod.rs",
     ];
     expected.sort_unstable();
 

backend/crates/gateway-api/tests/openai/auth.rs

@@ -13,6 +13,32 @@ fn bearer_client_api_key_should_reject_missing_authorization() {
     );
 }
 
+#[test]
+fn actor_authorization_marker_should_not_replace_client_api_key() {
+    let mut headers = HeaderMap::new();
+    headers.insert(
+        "x-openai-actor-authorization",
+        HeaderValue::from_static("proxy-managed"),
+    );
+
+    assert_eq!(
+        bearer_client_api_key(&headers),
+        Err(ClientApiKeyAuthError::MissingAuthorization)
+    );
+}
+
+#[test]
+fn actor_authorization_marker_should_preserve_existing_bearer_authentication() {
+    let mut headers = HeaderMap::new();
+    headers.insert(
+        "x-openai-actor-authorization",
+        HeaderValue::from_static("proxy-managed"),
+    );
+    headers.insert(AUTHORIZATION, HeaderValue::from_static("Bearer sk_client"));
+
+    assert_eq!(bearer_client_api_key(&headers), Ok("sk_client"));
+}
+
 #[test]
 fn bearer_client_api_key_should_reject_non_utf8_authorization() {
     let mut headers = HeaderMap::new();

backend/crates/gateway-api/tests/openai/endpoint.rs

@@ -0,0 +1,107 @@
+use std::sync::{Arc, Mutex, atomic::AtomicBool, atomic::Ordering};
+
+use bytes::Bytes;
+use futures::future::BoxFuture;
+use gateway_core::engine::execution::ExecutionSession;
+use gateway_core::engine::{CoordinatedEvent, EngineError};
+use gateway_core::error::ProviderError;
+use gateway_core::event::{ProtocolWireEvent, ProviderEvent, ProviderResponseHeader};
+
+pub(super) struct BufferedJsonSession {
+    body: Option<Bytes>,
+    response_headers: Vec<ProviderResponseHeader>,
+    response_status: Option<u16>,
+    committed_statuses: Arc<Mutex<Vec<u16>>>,
+    finalized: AtomicBool,
+    failure: Option<ProviderError>,
+}
+
+impl BufferedJsonSession {
+    pub(super) fn success(
+        body: Bytes,
+        response_status: u16,
+        response_headers: Vec<ProviderResponseHeader>,
+        committed_statuses: Arc<Mutex<Vec<u16>>>,
+    ) -> Self {
+        Self {
+            body: Some(body),
+            response_headers,
+            response_status: Some(response_status),
+            committed_statuses,
+            finalized: AtomicBool::new(false),
+            failure: None,
+        }
+    }
+
+    pub(super) fn failure(error: ProviderError) -> Self {
+        Self {
+            body: None,
+            response_headers: Vec::new(),
+            response_status: None,
+            committed_statuses: Arc::new(Mutex::new(Vec::new())),
+            finalized: AtomicBool::new(false),
+            failure: Some(error),
+        }
+    }
+}
+
+impl ExecutionSession for BufferedJsonSession {
+    fn next_event(&mut self) -> BoxFuture<'_, Result<Option<CoordinatedEvent>, EngineError>> {
+        Box::pin(async { unreachable!("buffered JSON delivery does not stream") })
+    }
+
+    fn collect_uncommitted(&mut self) -> BoxFuture<'_, Result<Vec<ProviderEvent>, EngineError>> {
+        Box::pin(async move {
+            if let Some(error) = self.failure.take() {
+                return Err(EngineError::Provider(error));
+            }
+            Ok(vec![ProviderEvent::wire(
+                ProtocolWireEvent::raw_json(
+                    "openai",
+                    self.body.take().expect("single buffered JSON response"),
+                )
+                .expect("OpenAI protocol"),
+            )])
+        })
+    }
+
+    fn response_headers(&self) -> &[ProviderResponseHeader] {
+        &self.response_headers
+    }
+
+    fn response_status_code(&self) -> Option<u16> {
+        self.response_status
+    }
+
+    fn commit_downstream(
+        &mut self,
+        client_status_code: Option<u16>,
+    ) -> BoxFuture<'_, Result<(), EngineError>> {
+        Box::pin(async move {
+            self.committed_statuses
+                .lock()
+                .expect("committed status lock")
+                .push(client_status_code.expect("buffered JSON response status"));
+            self.finalized.store(true, Ordering::Release);
+            Ok(())
+        })
+    }
+
+    fn record_client_status(&mut self, _: u16) -> BoxFuture<'_, Result<(), EngineError>> {
+        Box::pin(async { Ok(()) })
+    }
+
+    fn is_finalized(&self) -> bool {
+        self.finalized.load(Ordering::Acquire)
+    }
+
+    fn cancel(&self) {
+        self.finalized.store(true, Ordering::Release);
+    }
+
+    fn detach_finalize(self: Box<Self>) -> BoxFuture<'static, ()> {
+        Box::pin(async move {
+            self.finalized.store(true, Ordering::Release);
+        })
+    }
+}

backend/crates/gateway-api/tests/openai/error.rs

@@ -11,6 +11,21 @@ use gateway_api::openai::error::{
     openai_error_response,
 };
 
+#[tokio::test]
+async fn key_budget_errors_preserve_limit_code_and_retry_after() {
+    for code in ["key_daily_budget_exceeded", "key_weekly_budget_exceeded"] {
+        let error = GatewayError::new(GatewayErrorKind::RateLimited, "key budget exhausted")
+            .with_client_code(code)
+            .with_retry_after(std::time::Duration::from_millis(1501));
+        let response = gateway_error_response(&error);
+        assert_eq!(response.status(), StatusCode::TOO_MANY_REQUESTS);
+        assert_eq!(response.headers()["retry-after"], "2");
+        let body: serde_json::Value =
+            serde_json::from_slice(&to_bytes(response.into_body(), 4096).await.unwrap()).unwrap();
+        assert_eq!(body["error"]["code"], code);
+    }
+}
+
 #[test]
 fn invalid_request_error_should_map_to_openai_bad_request() {
     assert_eq!(
@@ -433,3 +448,151 @@ async fn continuation_recovery_should_preserve_the_official_retry_signal() {
         })
     );
 }
+
+mod model_routing {
+    use std::collections::BTreeMap;
+    use std::sync::Arc;
+    use std::time::{Duration, SystemTime};
+
+    use axum::{
+        body::{Body, to_bytes},
+        http::{Request, StatusCode},
+    };
+    use futures::future::BoxFuture;
+    use gateway_core::engine::execution::{
+        DefaultExecutionService, ProviderCircuitDecision, ProviderCircuitError, ProviderCircuitPort,
+    };
+    use gateway_core::engine::provider::ProviderRegistry;
+    use gateway_core::routing::{ProviderKind, RuntimeSnapshot};
+    use gateway_core::runtime::RuntimeSnapshotHandle;
+    use serde_json::{Value, json};
+    use tower::ServiceExt;
+
+    use crate::openai::{
+        IgnoredClientApiKeyUsage, UnusedAdmissions, UnusedContinuation, UnusedExecutionStore,
+    };
+
+    struct TestCircuits {
+        blocked: bool,
+    }
+
+    impl ProviderCircuitPort for TestCircuits {
+        fn decision<'a>(
+            &'a self,
+            _: &'a ProviderKind,
+        ) -> BoxFuture<'a, Result<ProviderCircuitDecision, ProviderCircuitError>> {
+            Box::pin(async move {
+                Ok(if self.blocked {
+                    ProviderCircuitDecision::BlockedUntil(
+                        SystemTime::now() + Duration::from_secs(30),
+                    )
+                } else {
+                    ProviderCircuitDecision::Allow
+                })
+            })
+        }
+
+        fn observe_failure<'a>(
+            &'a self,
+            _: &'a ProviderKind,
+        ) -> BoxFuture<'a, Result<(), ProviderCircuitError>> {
+            Box::pin(async { unreachable!("routing rejection must not execute a provider") })
+        }
+
+        fn observe_success<'a>(
+            &'a self,
+            _: &'a ProviderKind,
+        ) -> BoxFuture<'a, Result<(), ProviderCircuitError>> {
+            Box::pin(async { unreachable!("routing rejection must not execute a provider") })
+        }
+    }
+
+    async fn request_model(
+        snapshot: RuntimeSnapshot,
+        model: &str,
+        stream: bool,
+        blocked: bool,
+    ) -> (StatusCode, Value) {
+        let execution = DefaultExecutionService::new(
+            RuntimeSnapshotHandle::new(snapshot),
+            Arc::new(UnusedExecutionStore),
+            ProviderRegistry::default(),
+            Arc::new(UnusedAdmissions),
+            Arc::new(TestCircuits { blocked }),
+            Arc::new(UnusedContinuation),
+            Arc::new(IgnoredClientApiKeyUsage),
+        );
+        let response = crate::openai::api_router(Arc::new(execution))
+            .await
+            .oneshot(
+                Request::post("/v1/responses")
+                    .header("authorization", "Bearer sk_model_routing")
+                    .header("content-type", "application/json")
+                    .body(Body::from(
+                        json!({"model": model, "input": "hello", "stream": stream}).to_string(),
+                    ))
+                    .expect("request"),
+            )
+            .await
+            .expect("response");
+        let status = response.status();
+        let body = to_bytes(response.into_body(), 16 * 1024)
+            .await
+            .expect("error body");
+        (status, serde_json::from_slice(&body).expect("error JSON"))
+    }
+
+    #[tokio::test]
+    async fn missing_models_should_return_404_with_a_specific_explanation() {
+        for (model, mappings, message) in [
+            (
+                "missing-model",
+                BTreeMap::new(),
+                "the requested model was not found in the provider catalogs available to this API key; check the model name",
+            ),
+            (
+                "model-a",
+                BTreeMap::from([("model-a".to_owned(), "missing-target".to_owned())]),
+                "the requested model maps to an upstream model that was not found in the provider catalogs available to this API key; check the configured model mapping",
+            ),
+        ] {
+            for stream in [false, true] {
+                let snapshot = crate::openai::snapshot("sk_model_routing", "openai")
+                    .with_model_mappings(mappings.clone());
+                let response = request_model(snapshot, model, stream, false).await;
+
+                assert_eq!(
+                    response,
+                    (
+                        StatusCode::NOT_FOUND,
+                        json!({"error": {
+                            "type": "invalid_request_error",
+                            "code": "model_not_found",
+                            "message": message,
+                        }}),
+                    ),
+                    "model={model}, stream={stream}",
+                );
+            }
+        }
+    }
+
+    #[tokio::test]
+    async fn an_existing_model_with_a_blocked_provider_should_remain_service_unavailable() {
+        let response = request_model(
+            crate::openai::snapshot("sk_model_routing", "openai"),
+            "model-a",
+            true,
+            true,
+        )
+        .await;
+
+        assert_eq!(
+            (response.0, response.1["error"]["code"].as_str()),
+            (
+                StatusCode::SERVICE_UNAVAILABLE,
+                Some("no_available_provider")
+            ),
+        );
+    }
+}

backend/crates/gateway-api/tests/openai/images/mod.rs

@@ -260,6 +260,8 @@ async fn image_routes_should_not_decode_bodies_and_should_preserve_both_directio
                     .header(AUTHORIZATION, "Bearer sk_images_test")
                     .header("content-type", "application/json")
                     .header("x-codex-image-turn-id", "turn_image_route")
+                    .header("session-id", "root-image-session")
+                    .header("thread-id", "child-image-thread")
                     .body(Body::from(body.to_vec()))
                     .expect("image request"),
             )
@@ -286,7 +288,7 @@ async fn image_routes_should_not_decode_bodies_and_should_preserve_both_directio
         assert_eq!(captured.body.as_ref(), *body);
         assert_eq!(
             captured.context,
-            json!({"image_turn_id": "turn_image_route"})
+            json!({"image_turn_id": "turn_image_route", "session_id": "root-image-session", "thread_id": "child-image-thread"})
         );
     }
     assert_eq!(

backend/crates/gateway-api/tests/openai/mod.rs

@@ -1,9 +1,11 @@
 mod auth;
+mod endpoint;
 mod error;
 mod images;
 mod models;
 mod responses;
 mod router;
+mod search;
 
 use std::collections::{BTreeMap, BTreeSet};
 use std::num::NonZeroU32;

backend/crates/gateway-api/tests/openai/models.rs

@@ -383,46 +383,6 @@ async fn model_detail_should_hide_unknown_models() {
     assert_eq!(response.status(), StatusCode::NOT_FOUND);
 }
 
-#[tokio::test]
-async fn model_catalog_should_keep_the_codex_catalog_contract() {
-    let response = api_router(ModelsExecution::new())
-        .await
-        .oneshot(authorized_request("/v1/models/catalog"))
-        .await
-        .expect("catalog response");
-
-    assert_eq!(response.status(), StatusCode::OK);
-    let body = to_bytes(response.into_body(), usize::MAX)
-        .await
-        .expect("read catalog body");
-    let value: serde_json::Value = serde_json::from_slice(&body).expect("catalog JSON");
-    assert_eq!(value[0]["id"], "model-a");
-    assert_eq!(value[0]["displayName"], "model-a");
-    assert_eq!(value[0]["source"], "gateway");
-}
-
-#[tokio::test]
-async fn model_info_should_return_a_single_visible_catalog_entry() {
-    let response = api_router(ModelsExecution::new())
-        .await
-        .oneshot(authorized_request("/v1/models/model-a/info"))
-        .await
-        .expect("model info response");
-
-    assert_eq!(response.status(), StatusCode::OK);
-}
-
-#[tokio::test]
-async fn model_info_should_hide_unknown_models() {
-    let response = api_router(ModelsExecution::new())
-        .await
-        .oneshot(authorized_request("/v1/models/model-private/info"))
-        .await
-        .expect("missing model info response");
-
-    assert_eq!(response.status(), StatusCode::NOT_FOUND);
-}
-
 #[tokio::test]
 async fn models_should_authenticate_before_applying_the_version_gate() {
     let response = api_router(ModelsExecution::with_cli_min())

backend/crates/gateway-api/tests/openai/responses/http.rs

@@ -4,6 +4,7 @@ use std::sync::{
     Arc, Mutex,
     atomic::{AtomicBool, Ordering},
 };
+use std::time::Duration;
 
 use axum::{
     body::{Body, to_bytes},
@@ -14,6 +15,7 @@ use axum::{
     },
 };
 use bytes::Bytes;
+use futures::StreamExt;
 use futures::future::{BoxFuture, pending};
 use gateway_core::engine::execution::{
     AuthenticatedClient, ClientAuthenticationError, ExecutionService, ExecutionSession,
@@ -36,7 +38,7 @@ use serde_json::{Value, json};
 use gateway_api::openai::responses::{collect_execution_response, stream_execution_response};
 use tower::ServiceExt;
 
-use crate::openai::{api_router, authenticated_client, authenticated_client_for_provider};
+use crate::openai::{api_router, authenticated_client_for_provider};
 
 #[derive(Default)]
 struct Trace {
@@ -79,6 +81,7 @@ impl Trace {
 
 enum NextStep {
     Event(CoordinatedEvent),
+    DelayedEvent(Duration, CoordinatedEvent),
     Error(EngineError),
     FinalizeCancelled,
     FinalizeSuccess,
@@ -280,6 +283,12 @@ impl ExecutionSession for FakeSession {
                     self.trace.push("next_event");
                     Ok(Some(event))
                 }
+                NextStep::DelayedEvent(delay, event) => {
+                    self.trace.push("wait_event");
+                    tokio::time::sleep(delay).await;
+                    self.trace.push("next_event");
+                    Ok(Some(event))
+                }
                 NextStep::Error(error) => {
                     self.trace.push("next_error");
                     self.finalized = true;
@@ -689,92 +698,6 @@ async fn xai_private_headers_should_not_enter_openai_request_facts() {
     assert!(captured.prompt_cache_key.is_none());
 }
 
-#[tokio::test]
-async fn review_route_should_inject_review_subagent_and_record_its_endpoint() {
-    let observed = Arc::new(Mutex::new(None));
-    let execution = Arc::new(ContextCaptureExecution {
-        observed: Arc::clone(&observed),
-        client: authenticated_client("sk_context_test"),
-    });
-    let request = Request::post("/v1/responses/review")
-        .header(AUTHORIZATION, "Bearer sk_context_test")
-        .header("x-openai-subagent", "compact")
-        .body(Body::from(
-            json!({
-                "model": "smart-code",
-                "input": "review this",
-                "client_metadata": {"existing": "preserved"}
-            })
-            .to_string(),
-        ))
-        .expect("review request");
-
-    let response = api_router(execution)
-        .await
-        .oneshot(request)
-        .await
-        .expect("review response");
-    let captured = observed
-        .lock()
-        .expect("review capture lock")
-        .clone()
-        .expect("captured review request");
-
-    assert_eq!(response.status(), StatusCode::INTERNAL_SERVER_ERROR);
-    assert_eq!(captured.endpoint, "/v1/responses/review");
-    assert_eq!(
-        captured
-            .client_metadata
-            .as_ref()
-            .and_then(|metadata| metadata.get("x-openai-subagent")),
-        Some(&json!("review"))
-    );
-    assert_eq!(
-        captured
-            .client_metadata
-            .as_ref()
-            .and_then(|metadata| metadata.get("existing")),
-        Some(&json!("preserved"))
-    );
-}
-
-#[tokio::test]
-async fn review_route_should_not_replace_non_object_client_metadata() {
-    let observed = Arc::new(Mutex::new(None));
-    let execution = Arc::new(ContextCaptureExecution {
-        observed: Arc::clone(&observed),
-        client: authenticated_client("sk_context_test"),
-    });
-    let request = Request::post("/v1/responses/review")
-        .header(AUTHORIZATION, "Bearer sk_context_test")
-        .body(Body::from(
-            json!({
-                "model": "smart-code",
-                "input": "review this",
-                "client_metadata": ["opaque", "client", "value"]
-            })
-            .to_string(),
-        ))
-        .expect("review request");
-
-    let response = api_router(execution)
-        .await
-        .oneshot(request)
-        .await
-        .expect("review response");
-    let captured = observed
-        .lock()
-        .expect("review capture lock")
-        .clone()
-        .expect("captured review request");
-
-    assert_eq!(response.status(), StatusCode::INTERNAL_SERVER_ERROR);
-    assert_eq!(
-        captured.client_metadata,
-        Some(json!(["opaque", "client", "value"]))
-    );
-}
-
 #[tokio::test]
 async fn streaming_encodes_first_frame_before_commit_and_http_delivery() {
     let trace = Arc::new(Trace::default());
@@ -795,6 +718,154 @@ async fn streaming_encodes_first_frame_before_commit_and_http_delivery() {
     std::mem::forget(response);
 }
 
+#[tokio::test(start_paused = true)]
+async fn streaming_should_keep_alive_during_silent_compaction_without_restarting_execution() {
+    let trace = Arc::new(Trace::default());
+    let session = FakeSession::streaming(
+        Arc::clone(&trace),
+        vec![
+            NextStep::Event(delivery(started(), CommitRequirement::CommitBeforeDelivery)),
+            NextStep::DelayedEvent(
+                Duration::from_secs(240),
+                delivery(completed(), CommitRequirement::AlreadyCommitted),
+            ),
+            NextStep::FinalizeSuccess,
+        ],
+    );
+    let response = stream_execution_response(Box::new(session), None).await;
+    let mut body = response.into_body().into_data_stream();
+    let first = body.next().await.expect("first frame").expect("body bytes");
+    assert!(String::from_utf8_lossy(&first).contains("response.created"));
+    let start = tokio::time::Instant::now();
+
+    for heartbeat in 1..16 {
+        let chunk = tokio::time::timeout(Duration::from_secs(20), body.next())
+            .await
+            .expect("silent upstream must not leave the downstream idle")
+            .expect("heartbeat frame")
+            .expect("heartbeat bytes");
+        assert_eq!(chunk, Bytes::from_static(b": keep-alive\n\n"));
+        assert_eq!(start.elapsed(), Duration::from_secs(15 * heartbeat));
+    }
+
+    let terminal = body
+        .next()
+        .await
+        .expect("terminal frame")
+        .expect("body bytes");
+    assert!(String::from_utf8_lossy(&terminal).contains("response.completed"));
+    assert_eq!(start.elapsed(), Duration::from_secs(240));
+    assert_eq!(
+        body.next().await.expect("done frame").expect("body bytes"),
+        Bytes::from_static(b"data: [DONE]\n\n")
+    );
+    assert!(body.next().await.is_none());
+    assert_eq!(
+        trace.snapshot(),
+        vec![
+            "next_event",
+            "commit",
+            "wait_event",
+            "next_event",
+            "next_end"
+        ]
+    );
+    assert!(!trace.is_cancelled());
+}
+
+#[tokio::test(start_paused = true)]
+async fn dropping_stream_during_keepalive_should_cancel_and_finalize_execution() {
+    let trace = Arc::new(Trace::default());
+    let session = FakeSession::streaming(
+        Arc::clone(&trace),
+        vec![
+            NextStep::Event(delivery(started(), CommitRequirement::CommitBeforeDelivery)),
+            NextStep::DelayedEvent(
+                Duration::from_secs(240),
+                delivery(completed(), CommitRequirement::AlreadyCommitted),
+            ),
+            NextStep::FinalizeCancelled,
+        ],
+    );
+    let response = stream_execution_response(Box::new(session), None).await;
+    let mut body = response.into_body().into_data_stream();
+    let _ = body.next().await.expect("first frame").expect("body bytes");
+    let heartbeat = tokio::time::timeout(Duration::from_secs(20), body.next())
+        .await
+        .expect("heartbeat before client disconnect")
+        .expect("heartbeat frame")
+        .expect("heartbeat bytes");
+    assert_eq!(heartbeat, Bytes::from_static(b": keep-alive\n\n"));
+
+    drop(body);
+    tokio::task::yield_now().await;
+
+    assert!(trace.is_cancelled());
+    assert_eq!(
+        trace.snapshot(),
+        vec!["next_event", "commit", "wait_event", "cancel_finalize"]
+    );
+}
+
+#[tokio::test(start_paused = true)]
+async fn streaming_keepalive_should_wait_for_first_event_before_committing_http_status() {
+    let trace = Arc::new(Trace::default());
+    let session = FakeSession::streaming(
+        Arc::clone(&trace),
+        vec![
+            NextStep::DelayedEvent(
+                Duration::from_secs(45),
+                delivery(started(), CommitRequirement::CommitBeforeDelivery),
+            ),
+            NextStep::FinalizeCancelled,
+        ],
+    );
+    let response = tokio::spawn(stream_execution_response(Box::new(session), None));
+    tokio::task::yield_now().await;
+    tokio::time::advance(Duration::from_secs(30)).await;
+
+    assert!(!response.is_finished());
+    assert!(trace.client_statuses().is_empty());
+    let response = response.await.expect("response task");
+    assert_eq!(response.status(), StatusCode::OK);
+    assert_eq!(trace.snapshot(), vec!["wait_event", "next_event", "commit"]);
+}
+
+#[tokio::test]
+async fn streaming_response_should_disable_proxy_buffering_and_cache_transformation() {
+    let session = FakeSession::streaming(
+        Arc::new(Trace::default()),
+        vec![
+            NextStep::Event(delivery(started(), CommitRequirement::CommitBeforeDelivery)),
+            NextStep::FinalizeCancelled,
+        ],
+    )
+    .with_response_headers(vec![
+        ProviderResponseHeader::new("x-accel-buffering", Bytes::from_static(b"yes")),
+        ProviderResponseHeader::new("cache-control", Bytes::from_static(b"public, max-age=60")),
+    ]);
+
+    let response = stream_execution_response(Box::new(session), None).await;
+
+    assert_eq!(response.headers()["x-accel-buffering"], "no");
+    assert_eq!(
+        response.headers()["cache-control"],
+        "no-cache, no-transform"
+    );
+    assert_eq!(
+        response
+            .headers()
+            .get_all("x-accel-buffering")
+            .iter()
+            .count(),
+        1
+    );
+    assert_eq!(
+        response.headers().get_all("cache-control").iter().count(),
+        1
+    );
+}
+
 #[tokio::test]
 async fn streaming_response_should_append_ordinary_headers_and_skip_unrepresentable_or_sensitive_ones()
  {
@@ -979,6 +1050,41 @@ async fn streaming_rate_limit_before_first_frame_should_persist_the_returned_429
     assert_eq!(trace.client_statuses(), vec![429]);
 }
 
+#[tokio::test]
+async fn streaming_failure_before_first_frame_should_return_safe_observed_headers() {
+    let trace = Arc::new(Trace::default());
+    let session = FakeSession::streaming(
+        Arc::clone(&trace),
+        vec![NextStep::Error(EngineError::Provider(ProviderError::new(
+            ProviderErrorKind::Unavailable,
+            UpstreamSendState::Ambiguous,
+        )))],
+    )
+    .with_response_headers(vec![
+        ProviderResponseHeader::new(
+            "x-codex-turn-state",
+            Bytes::from_static(b"turn-state-before-close"),
+        ),
+        ProviderResponseHeader::new(
+            "authorization",
+            Bytes::from_static(b"must-not-cross-boundary"),
+        ),
+    ]);
+
+    let response = stream_execution_response(Box::new(session), None).await;
+
+    assert_eq!(response.status(), StatusCode::BAD_GATEWAY);
+    assert_eq!(
+        response
+            .headers()
+            .get("x-codex-turn-state")
+            .and_then(|value| value.to_str().ok()),
+        Some("turn-state-before-close")
+    );
+    assert!(response.headers().get("authorization").is_none());
+    assert_eq!(trace.client_statuses(), vec![502]);
+}
+
 #[tokio::test]
 async fn streaming_upstream_http_failure_before_first_frame_should_preserve_raw_response() {
     let trace = Arc::new(Trace::default());
@@ -1065,11 +1171,29 @@ async fn buffered_upstream_http_failure_should_preserve_raw_response() {
             raw_body.clone(),
         ));
     let session = FakeSession::buffered(Arc::clone(&trace), vec![started(), completed()])
-        .with_collect_error(EngineError::Provider(error));
+        .with_collect_error(EngineError::Provider(error))
+        .with_response_headers(vec![
+            ProviderResponseHeader::new(
+                "x-codex-turn-state",
+                Bytes::from_static(b"turn-state-before-close"),
+            ),
+            ProviderResponseHeader::new(
+                "authorization",
+                Bytes::from_static(b"must-not-cross-boundary"),
+            ),
+        ]);
 
     let response = collect_execution_response(Box::new(session)).await;
 
     assert_eq!(response.status(), StatusCode::SERVICE_UNAVAILABLE);
+    assert_eq!(
+        response
+            .headers()
+            .get("x-codex-turn-state")
+            .and_then(|value| value.to_str().ok()),
+        Some("turn-state-before-close")
+    );
+    assert!(response.headers().get("authorization").is_none());
     assert_eq!(
         to_bytes(response.into_body(), usize::MAX)
             .await

backend/crates/gateway-api/tests/openai/responses/mod.rs

@@ -281,6 +281,10 @@ fn decoder_should_preserve_ordinary_request_headers_as_opaque_multivalues() {
     headers.insert("content-length", HeaderValue::from_static("999"));
     headers.insert("authorization", HeaderValue::from_static("Bearer client"));
     headers.insert("x-api-key", HeaderValue::from_static("client-key"));
+    headers.insert(
+        "x-openai-actor-authorization",
+        HeaderValue::from_static("proxy-managed"),
+    );
     headers.insert("cookie", HeaderValue::from_static("client=cookie"));
     headers.insert(
         "chatgpt-account-id",
@@ -348,6 +352,7 @@ fn decoder_should_preserve_ordinary_request_headers_as_opaque_multivalues() {
         "content-length",
         "authorization",
         "x-api-key",
+        "x-openai-actor-authorization",
         "cookie",
         "chatgpt-account-id",
         "chatgpt-project-id",

backend/crates/gateway-api/tests/openai/responses/websocket/connection.rs

@@ -2,8 +2,8 @@ use std::{
     fmt,
     pin::Pin,
     sync::{
-        Arc,
-        atomic::{AtomicBool, Ordering},
+        Arc, Mutex,
+        atomic::{AtomicBool, AtomicUsize, Ordering},
     },
     task::{Context, Poll},
     time::{Duration, SystemTime},
@@ -25,6 +25,7 @@ use gateway_core::{
     error::GatewayError,
     event::{GatewayEvent, ProtocolWireEvent, ProviderEvent, ProviderResponseHeader, ResponseMeta},
     lifecycle::CancellationToken,
+    operation::Operation,
     routing::PublicModelId,
 };
 use serde_json::{Value, json};
@@ -32,7 +33,7 @@ use tokio::sync::mpsc::{
     UnboundedReceiver, UnboundedSender, error::TryRecvError, unbounded_channel,
 };
 use tokio_tungstenite::{
-    connect_async,
+    MaybeTlsStream, WebSocketStream, connect_async,
     tungstenite::{
         Message as ClientMessage, client::IntoClientRequest, protocol::frame::coding::CloseCode,
     },
@@ -44,27 +45,33 @@ use crate::openai::{api_router, authenticated_client};
 #[derive(Default)]
 struct CrossingLimitTrace {
     release_terminal: tokio::sync::Notify,
-    started_emitted: AtomicBool,
-    terminal_emitted: AtomicBool,
+    starts: AtomicUsize,
+    inputs: Mutex<Vec<Value>>,
+    cancelled: AtomicBool,
+    cancellation_observed: tokio::sync::Notify,
     finalized: AtomicBool,
 }
 
 struct CrossingLimitSession {
     trace: Arc<CrossingLimitTrace>,
+    started_emitted: bool,
+    terminal_emitted: bool,
+    finalized: bool,
 }
 
 impl ExecutionSession for CrossingLimitSession {
     fn next_event(&mut self) -> BoxFuture<'_, Result<Option<CoordinatedEvent>, EngineError>> {
         Box::pin(async move {
-            if !self.trace.started_emitted.swap(true, Ordering::AcqRel) {
+            if !self.started_emitted {
+                self.started_emitted = true;
                 return Ok(Some(crossing_limit_started_batch()));
             }
-            if !self.trace.terminal_emitted.load(Ordering::Acquire) {
+            if !self.terminal_emitted {
                 self.trace.release_terminal.notified().await;
-                if !self.trace.terminal_emitted.swap(true, Ordering::AcqRel) {
-                    return Ok(Some(crossing_limit_terminal_batch()));
-                }
+                self.terminal_emitted = true;
+                return Ok(Some(crossing_limit_terminal_batch()));
             }
+            self.finalized = true;
             self.trace.finalized.store(true, Ordering::Release);
             Ok(None)
         })
@@ -87,10 +94,13 @@ impl ExecutionSession for CrossingLimitSession {
     }
 
     fn is_finalized(&self) -> bool {
-        self.trace.finalized.load(Ordering::Acquire)
+        self.finalized
     }
 
-    fn cancel(&self) {}
+    fn cancel(&self) {
+        self.trace.cancelled.store(true, Ordering::Release);
+        self.trace.cancellation_observed.notify_one();
+    }
 
     fn detach_finalize(self: Box<Self>) -> BoxFuture<'static, ()> {
         Box::pin(async move {
@@ -127,6 +137,14 @@ impl ExecutionService for CrossingLimitExecution {
         request: StartExecution,
     ) -> BoxFuture<'_, Result<StartedExecution, GatewayError>> {
         Box::pin(async move {
+            self.trace.starts.fetch_add(1, Ordering::AcqRel);
+            if let Operation::Generate(generate) = &request.operation {
+                self.trace
+                    .inputs
+                    .lock()
+                    .expect("input trace lock")
+                    .push(generate.protocol_payload().body()["input"].clone());
+            }
             Ok(StartedExecution {
                 request_id: gateway_core::engine::ModelRequestId::new("req_ws_crossing_limit")
                     .expect("request id"),
@@ -134,6 +152,9 @@ impl ExecutionService for CrossingLimitExecution {
                 stream: request.metadata.stream,
                 session: Box::new(CrossingLimitSession {
                     trace: Arc::clone(&self.trace),
+                    started_emitted: false,
+                    terminal_emitted: false,
+                    finalized: false,
                 }),
             })
         })
@@ -192,7 +213,7 @@ fn crossing_limit_terminal_batch() -> CoordinatedEvent {
 }
 
 use gateway_api::openai::responses::websocket::connection::{
-    ConnectionConfig, ConnectionEvent, ConnectionWriteError, FramePhase,
+    ConnectionConfig, ConnectionEvent, ConnectionWriteError, FramePhase, PumpExitReason,
     ResponsesWebSocketConnection, WriteContext, spawn_connection,
 };
 
@@ -255,12 +276,14 @@ struct PumpHarness {
     incoming: UnboundedSender<Result<Message, TestSocketError>>,
     written: UnboundedReceiver<Message>,
     dropped: Arc<AtomicBool>,
+    cancellation: CancellationToken,
 }
 
 fn test_connection(stall_writes: bool) -> PumpHarness {
     let (incoming_tx, incoming_rx) = unbounded_channel();
     let (written_tx, written_rx) = unbounded_channel();
     let dropped = Arc::new(AtomicBool::new(false));
+    let cancellation = CancellationToken::new();
     let socket = TestSocket {
         incoming: incoming_rx,
         written: written_tx,
@@ -270,7 +293,7 @@ fn test_connection(stall_writes: bool) -> PumpHarness {
     let connection = spawn_connection(
         socket,
         Arc::from("ws_test"),
-        CancellationToken::new(),
+        cancellation.clone(),
         ConnectionConfig::PRODUCTION,
     );
     PumpHarness {
@@ -278,6 +301,7 @@ fn test_connection(stall_writes: bool) -> PumpHarness {
         incoming: incoming_tx,
         written: written_rx,
         dropped,
+        cancellation,
     }
 }
 
@@ -317,18 +341,107 @@ async fn pump_consumes_pong_without_forwarding_a_business_event() {
 }
 
 #[tokio::test(start_paused = true)]
-async fn pump_does_not_emit_an_active_ping() {
+async fn waiting_for_exit_should_preserve_queued_business_frames() {
     let PumpHarness {
-        connection,
-        incoming: _incoming,
-        mut written,
+        mut connection,
+        incoming,
         ..
     } = test_connection(false);
-    tokio::time::advance(Duration::from_secs(5 * 60)).await;
-    tokio::task::yield_now().await;
+    for payload in ["first", "second"] {
+        incoming
+            .send(Ok(Message::Text(payload.into())))
+            .expect("queue text");
+    }
 
-    assert!(matches!(written.try_recv(), Err(TryRecvError::Empty)));
-    drop(connection);
+    assert!(
+        tokio::time::timeout(Duration::from_secs(1), connection.wait_for_exit())
+            .await
+            .is_err()
+    );
+    for expected in ["first", "second"] {
+        assert!(
+            matches!(connection.next_event().await, Some(ConnectionEvent::Text(payload)) if payload == expected)
+        );
+    }
+}
+
+#[tokio::test]
+async fn client_close_should_take_priority_over_queued_business_frames() {
+    let PumpHarness {
+        mut connection,
+        incoming,
+        ..
+    } = test_connection(false);
+    incoming
+        .send(Ok(Message::Text("queued".into())))
+        .expect("queue text");
+    incoming
+        .send(Ok(Message::Close(None)))
+        .expect("close socket");
+
+    assert_eq!(
+        tokio::time::timeout(Duration::from_secs(1), connection.wait_for_exit())
+            .await
+            .expect("observe close"),
+        PumpExitReason::ClientClose
+    );
+    assert!(matches!(
+        connection.next_event().await,
+        Some(ConnectionEvent::Exited(PumpExitReason::ClientClose))
+    ));
+}
+
+#[tokio::test]
+async fn full_business_queue_should_not_block_lifecycle_shutdown() {
+    let PumpHarness {
+        mut connection,
+        incoming,
+        mut written,
+        cancellation,
+        ..
+    } = test_connection(false);
+    for _ in 0..32 {
+        incoming
+            .send(Ok(Message::Text("queued".into())))
+            .expect("queue text");
+    }
+    incoming
+        .send(Ok(Message::Ping(vec![1].into())))
+        .expect("send Ping after queue fills");
+    assert!(matches!(written.recv().await, Some(Message::Pong(_))));
+    cancellation.cancel();
+
+    assert_eq!(
+        tokio::time::timeout(Duration::from_secs(1), connection.wait_for_exit())
+            .await
+            .expect("observe shutdown"),
+        PumpExitReason::LifecycleShutdown
+    );
+}
+
+#[tokio::test]
+async fn inbound_overload_should_close_without_executing_queued_frames() {
+    let PumpHarness {
+        mut connection,
+        incoming,
+        ..
+    } = test_connection(false);
+    for _ in 0..33 {
+        incoming
+            .send(Ok(Message::Text("queued".into())))
+            .expect("queue text");
+    }
+
+    assert_eq!(
+        tokio::time::timeout(Duration::from_secs(1), connection.wait_for_exit())
+            .await
+            .expect("observe overload"),
+        PumpExitReason::InboundOverload
+    );
+    assert!(matches!(
+        connection.next_event().await,
+        Some(ConnectionEvent::Exited(PumpExitReason::InboundOverload))
+    ));
 }
 
 #[tokio::test]
@@ -371,6 +484,7 @@ async fn stalled_write_times_out_at_three_hundred_seconds_and_aborts_the_pump()
         incoming: _incoming,
         written: _written,
         dropped,
+        ..
     } = test_connection(true);
     let request_id = Arc::<str>::from("req_test");
 
@@ -413,6 +527,7 @@ async fn dropping_the_connection_aborts_and_drops_the_socket_owner() {
         incoming: _incoming,
         written: _written,
         dropped,
+        ..
     } = test_connection(false);
 
     drop(connection);
@@ -428,6 +543,7 @@ async fn idle_connection_reaches_the_official_limit_without_starting_an_executio
         client: authenticated_client("sk_ws_atomic"),
         trace: Arc::clone(&trace),
         response_headers: Vec::new(),
+        fail_before_first_event: false,
     });
     let app = api_router(execution).await;
     let listener = tokio::net::TcpListener::bind("127.0.0.1:0")
@@ -451,13 +567,17 @@ async fn idle_connection_reaches_the_official_limit_without_starting_an_executio
 
     tokio::time::advance(Duration::from_secs(60 * 60)).await;
     tokio::task::yield_now().await;
-    let message = tokio::time::timeout(Duration::from_secs(1), socket.next())
-        .await
-        .expect("connection limit response timeout")
-        .expect("connection remains available for the limit error")
-        .expect("valid WebSocket frame");
-    let ClientMessage::Text(text) = message else {
-        panic!("connection limit must be a text error event");
+    let text = loop {
+        let message = tokio::time::timeout(Duration::from_secs(1), socket.next())
+            .await
+            .expect("connection limit response timeout")
+            .expect("connection remains available for the limit error")
+            .expect("valid WebSocket frame");
+        match message {
+            ClientMessage::Text(text) => break text,
+            ClientMessage::Ping(_) => {}
+            other => panic!("unexpected frame before connection limit: {other:?}"),
+        }
     };
     let value = serde_json::from_str::<Value>(&text).expect("connection limit JSON");
 
@@ -475,7 +595,8 @@ async fn idle_connection_reaches_the_official_limit_without_starting_an_executio
     );
     assert_eq!(trace.starts.load(Ordering::Acquire), 0);
 
-    socket.close(None).await.expect("close WebSocket");
+    // 服务端已因生命周期到期关闭；不再向关闭中的连接写入。
+    drop(socket);
     server.abort();
 }
 
@@ -539,6 +660,27 @@ async fn active_response_crossing_the_limit_writes_terminal_before_the_limit_err
         }
     }
 
+    for _ in 0..32 {
+        socket
+            .send(ClientMessage::Text(
+                json!({"type": "response.create", "model": "model-a", "input": "queued after limit"})
+                    .to_string()
+                    .into(),
+            ))
+            .await
+            .expect("fill request queue before expiry");
+    }
+    socket
+        .send(ClientMessage::Ping(vec![1].into()))
+        .await
+        .expect("send Ping after queued request");
+    let pong = tokio::time::timeout(Duration::from_secs(1), socket.next())
+        .await
+        .expect("Pong timeout")
+        .expect("connection remains open")
+        .expect("valid frame");
+    assert!(matches!(pong, ClientMessage::Pong(_)));
+
     tokio::time::pause();
     tokio::time::advance(Duration::from_secs(60 * 60)).await;
     tokio::task::yield_now().await;
@@ -567,15 +709,21 @@ async fn active_response_crossing_the_limit_writes_terminal_before_the_limit_err
 
     assert_eq!(event_types, ["response.completed", "error"]);
     assert!(trace.finalized.load(Ordering::Acquire));
+    assert_eq!(trace.starts.load(Ordering::Acquire), 1);
     server.abort();
 }
 
-#[tokio::test]
-async fn second_text_frame_during_an_active_response_keeps_the_single_response_contract() {
+type TestClientSocket = WebSocketStream<MaybeTlsStream<tokio::net::TcpStream>>;
+
+async fn start_active_response() -> (
+    Arc<CrossingLimitTrace>,
+    TestClientSocket,
+    tokio::task::JoinHandle<()>,
+) {
     let trace = Arc::new(CrossingLimitTrace::default());
     let execution = Arc::new(CrossingLimitExecution {
         client: authenticated_client("sk_ws_crossing_limit"),
-        trace,
+        trace: Arc::clone(&trace),
     });
     let app = api_router(execution).await;
     let listener = tokio::net::TcpListener::bind("127.0.0.1:0")
@@ -607,7 +755,7 @@ async fn second_text_frame_during_an_active_response_keeps_the_single_response_c
         .into(),
     );
     socket
-        .send(response_create.clone())
+        .send(response_create)
         .await
         .expect("send first response.create");
     loop {
@@ -625,19 +773,300 @@ async fn second_text_frame_during_an_active_response_keeps_the_single_response_c
         }
     }
 
+    (trace, socket, server)
+}
+
+#[tokio::test]
+async fn requests_received_during_an_active_response_should_execute_in_order() {
+    let (trace, mut socket, server) = start_active_response().await;
+    for input in ["second", "third"] {
+        socket
+            .send(ClientMessage::Text(
+                json!({"type": "response.create", "model": "model-a", "input": input})
+                    .to_string()
+                    .into(),
+            ))
+            .await
+            .expect("send queued response.create");
+    }
     socket
-        .send(response_create)
+        .send(ClientMessage::Ping(vec![1, 2, 3].into()))
         .await
-        .expect("send overlapping response.create");
+        .expect("send Ping after queued requests");
+    let message = tokio::time::timeout(Duration::from_secs(2), socket.next())
+        .await
+        .expect("Pong timeout while response is active")
+        .expect("WebSocket remains open")
+        .expect("valid WebSocket frame");
+    assert!(matches!(message, ClientMessage::Pong(_)));
+    assert_eq!(trace.starts.load(Ordering::Acquire), 1);
+
+    for completed_count in 1..=3 {
+        trace.release_terminal.notify_one();
+        let expected_types = if completed_count < 3 {
+            vec![
+                "response.completed",
+                "response.metadata",
+                "response.created",
+            ]
+        } else {
+            vec!["response.completed"]
+        };
+        let mut event_types = Vec::new();
+        for _ in &expected_types {
+            let message = tokio::time::timeout(Duration::from_secs(2), socket.next())
+                .await
+                .expect("serial response timeout")
+                .expect("WebSocket remains open")
+                .expect("valid WebSocket frame");
+            let ClientMessage::Text(text) = message else {
+                panic!("unexpected frame during serial execution: {message:?}");
+            };
+            let event: Value = serde_json::from_str(&text).expect("response event JSON");
+            event_types.push(event["type"].as_str().expect("event type").to_owned());
+        }
+        assert_eq!(event_types, expected_types);
+        assert_eq!(
+            trace.starts.load(Ordering::Acquire),
+            (completed_count + 1).min(3)
+        );
+    }
+    assert_eq!(
+        *trace.inputs.lock().expect("input trace lock"),
+        vec![json!("hello"), json!("second"), json!("third")]
+    );
+    assert!(!trace.cancelled.load(Ordering::Acquire));
+    socket.close(None).await.expect("close WebSocket");
+    server.abort();
+}
+
+#[tokio::test]
+async fn queued_unknown_message_should_be_rejected_before_the_next_valid_request() {
+    let (trace, mut socket, server) = start_active_response().await;
+    for payload in [
+        json!({"type": "response.future"}),
+        json!({"type": "response.create", "model": "model-a", "input": "next"}),
+    ] {
+        socket
+            .send(ClientMessage::Text(payload.to_string().into()))
+            .await
+            .expect("queue frame");
+    }
+    trace.release_terminal.notify_one();
+
+    let mut event_types = Vec::new();
+    for _ in 0..4 {
+        let message = tokio::time::timeout(Duration::from_secs(2), socket.next())
+            .await
+            .expect("response timeout")
+            .expect("connection remains open")
+            .expect("valid frame");
+        let ClientMessage::Text(text) = message else {
+            panic!("unexpected frame: {message:?}");
+        };
+        let event: Value = serde_json::from_str(&text).expect("event JSON");
+        event_types.push(event["type"].as_str().expect("event type").to_owned());
+    }
+    assert_eq!(
+        event_types,
+        [
+            "response.completed",
+            "error",
+            "response.metadata",
+            "response.created"
+        ]
+    );
+    assert_eq!(trace.starts.load(Ordering::Acquire), 2);
+    assert_eq!(
+        *trace.inputs.lock().expect("input trace lock"),
+        vec![json!("hello"), json!("next")]
+    );
+    socket.close(None).await.expect("close WebSocket");
+    server.abort();
+}
+
+#[tokio::test]
+async fn queued_binary_frame_should_be_rejected_after_the_active_response_finishes() {
+    let (trace, mut socket, server) = start_active_response().await;
+    socket
+        .send(ClientMessage::Binary(b"{}".to_vec().into()))
+        .await
+        .expect("queue binary frame");
+    trace.release_terminal.notify_one();
+
+    let message = tokio::time::timeout(Duration::from_secs(2), socket.next())
+        .await
+        .expect("terminal timeout")
+        .expect("connection remains open")
+        .expect("valid frame");
+    let ClientMessage::Text(text) = message else {
+        panic!("active response did not finish before binary rejection: {message:?}");
+    };
+    let event: Value = serde_json::from_str(&text).expect("event JSON");
+    assert_eq!(event["type"], "response.completed");
     let message = tokio::time::timeout(Duration::from_secs(2), socket.next())
         .await
         .expect("policy close timeout")
-        .expect("WebSocket returns a policy close")
-        .expect("valid WebSocket frame");
-    let ClientMessage::Close(Some(frame)) = message else {
-        panic!("overlapping response.create must close the connection");
+        .expect("connection closes")
+        .expect("valid frame");
+    assert!(
+        matches!(message, ClientMessage::Close(Some(frame)) if frame.code == CloseCode::Policy)
+    );
+    assert_eq!(trace.starts.load(Ordering::Acquire), 1);
+    server.abort();
+}
+
+#[tokio::test]
+async fn client_close_should_cancel_active_execution_without_starting_queued_requests() {
+    let (trace, mut socket, server) = start_active_response().await;
+    socket
+        .send(ClientMessage::Text(
+            json!({"type": "response.create", "model": "model-a", "input": "queued"})
+                .to_string()
+                .into(),
+        ))
+        .await
+        .expect("queue request");
+    socket.close(None).await.expect("close WebSocket");
+
+    tokio::time::timeout(
+        Duration::from_secs(2),
+        trace.cancellation_observed.notified(),
+    )
+    .await
+    .expect("cancel active execution promptly");
+    assert_eq!(trace.starts.load(Ordering::Acquire), 1);
+    assert!(trace.cancelled.load(Ordering::Acquire));
+    server.abort();
+}
+
+#[tokio::test(start_paused = true)]
+async fn idle_pump_sends_heartbeat_without_bursting_after_a_delay() {
+    let PumpHarness {
+        connection,
+        incoming: _incoming,
+        mut written,
+        ..
+    } = test_connection(false);
+    tokio::task::yield_now().await;
+    assert!(matches!(written.try_recv(), Err(TryRecvError::Empty)));
+
+    tokio::time::advance(Duration::from_secs(25)).await;
+    let first = written.recv().await.expect("first heartbeat");
+    assert!(matches!(first, Message::Ping(_)));
+
+    tokio::time::advance(Duration::from_secs(120)).await;
+    let second = written.recv().await.expect("heartbeat after delay");
+    assert!(matches!(&second, Message::Ping(_)));
+    assert_ne!(first, second);
+    tokio::task::yield_now().await;
+    assert!(matches!(written.try_recv(), Err(TryRecvError::Empty)));
+    drop(connection);
+}
+
+#[tokio::test(start_paused = true)]
+async fn missing_pongs_do_not_cancel_the_connection_or_block_business_frames() {
+    let PumpHarness {
+        mut connection,
+        incoming,
+        mut written,
+        ..
+    } = test_connection(false);
+    for _ in 0..13 {
+        tokio::time::advance(Duration::from_secs(25)).await;
+        assert!(matches!(written.recv().await, Some(Message::Ping(_))));
+    }
+
+    incoming
+        .send(Ok(Message::Text("still connected".into())))
+        .expect("send business frame after 325 seconds without Pong");
+    assert!(matches!(
+        connection.next_event().await,
+        Some(ConnectionEvent::Text(text)) if text == "still connected"
+    ));
+    incoming.send(Ok(Message::Close(None))).expect("close peer");
+    assert_eq!(
+        connection.wait_for_exit().await,
+        PumpExitReason::ClientClose
+    );
+    tokio::time::advance(Duration::from_secs(25)).await;
+    assert!(written.recv().await.is_none());
+}
+
+#[tokio::test(start_paused = true)]
+async fn stalled_heartbeat_can_be_cancelled_without_waiting_for_write_timeout() {
+    let PumpHarness {
+        mut connection,
+        incoming: _incoming,
+        written: _written,
+        dropped,
+        cancellation,
+    } = test_connection(true);
+    tokio::time::advance(Duration::from_secs(25)).await;
+    tokio::task::yield_now().await;
+    cancellation.cancel();
+    let reason = tokio::time::timeout(Duration::from_secs(1), connection.wait_for_exit())
+        .await
+        .expect("cancel a blocked heartbeat promptly");
+    assert_eq!(reason, PumpExitReason::LifecycleShutdown);
+    assert!(dropped.load(Ordering::Acquire));
+}
+
+#[tokio::test(start_paused = true)]
+async fn stalled_heartbeat_obeys_the_existing_write_timeout() {
+    let PumpHarness {
+        mut connection,
+        incoming: _incoming,
+        written: _written,
+        dropped,
+        ..
+    } = test_connection(true);
+    let started = tokio::time::Instant::now();
+    assert_eq!(
+        connection.wait_for_exit().await,
+        PumpExitReason::WriteTimeout
+    );
+    assert_eq!(started.elapsed(), Duration::from_secs(25 + 300));
+    assert!(dropped.load(Ordering::Acquire));
+}
+
+#[tokio::test]
+async fn active_response_receives_heartbeats_during_two_hundred_seconds_of_silence() {
+    let (trace, mut socket, server) = start_active_response().await;
+    for _ in 0..8 {
+        tokio::time::pause();
+        tokio::time::advance(Duration::from_secs(25)).await;
+        tokio::task::yield_now().await;
+        tokio::time::resume();
+        let message = tokio::time::timeout(Duration::from_secs(2), socket.next())
+            .await
+            .expect("heartbeat while the upstream response is pending")
+            .expect("connection remains open")
+            .expect("valid heartbeat frame");
+        let ClientMessage::Ping(payload) = message else {
+            panic!("expected heartbeat while business stream is silent: {message:?}");
+        };
+        // 与官方 WsStream 一样，在业务响应未完成时回复同 payload 的 Pong。
+        socket
+            .send(ClientMessage::Pong(payload))
+            .await
+            .expect("reply to heartbeat");
+    }
+    assert_eq!(trace.starts.load(Ordering::Acquire), 1);
+    assert!(!trace.cancelled.load(Ordering::Acquire));
+
+    trace.release_terminal.notify_one();
+    let message = tokio::time::timeout(Duration::from_secs(2), socket.next())
+        .await
+        .expect("terminal response after heartbeats")
+        .expect("connection remains open")
+        .expect("valid terminal frame");
+    let ClientMessage::Text(text) = message else {
+        panic!("expected completed response: {message:?}");
     };
-
-    assert_eq!(frame.code, CloseCode::Policy);
+    let value: Value = serde_json::from_str(&text).expect("terminal JSON");
+    assert_eq!(value["type"], "response.completed");
+    assert_eq!(trace.starts.load(Ordering::Acquire), 1);
+    socket.close(None).await.expect("close WebSocket");
     server.abort();
 }

backend/crates/gateway-api/tests/openai/responses/websocket/mod.rs

@@ -2,7 +2,7 @@ mod connection;
 mod protocol;
 
 use std::sync::{
-    Arc,
+    Arc, Mutex,
     atomic::{AtomicBool, AtomicUsize, Ordering},
 };
 use std::time::{Duration, SystemTime};
@@ -280,17 +280,26 @@ struct AtomicFailureTrace {
     next_calls: AtomicUsize,
     committed: AtomicBool,
     finalized: AtomicBool,
+    downstream_websocket_connection_ids: Mutex<Vec<String>>,
 }
 
 struct AtomicFailureSession {
     trace: Arc<AtomicFailureTrace>,
     response_headers: Vec<ProviderResponseHeader>,
+    fail_before_first_event: bool,
 }
 
 impl ExecutionSession for AtomicFailureSession {
     fn next_event(&mut self) -> BoxFuture<'_, Result<Option<CoordinatedEvent>, EngineError>> {
         Box::pin(async move {
-            match self.trace.next_calls.fetch_add(1, Ordering::AcqRel) {
+            let next_call = self.trace.next_calls.fetch_add(1, Ordering::AcqRel);
+            if self.fail_before_first_event && next_call == 0 {
+                return Err(EngineError::Provider(ProviderError::new(
+                    ProviderErrorKind::Unavailable,
+                    UpstreamSendState::Ambiguous,
+                )));
+            }
+            match next_call {
                 0 => Ok(Some(atomic_failure_batch())),
                 1 => {
                     self.trace.finalized.store(true, Ordering::Release);
@@ -340,6 +349,7 @@ struct AtomicFailureExecution {
     client: AuthenticatedClient,
     trace: Arc<AtomicFailureTrace>,
     response_headers: Vec<ProviderResponseHeader>,
+    fail_before_first_event: bool,
 }
 
 impl ExecutionService for AtomicFailureExecution {
@@ -365,6 +375,19 @@ impl ExecutionService for AtomicFailureExecution {
         request: StartExecution,
     ) -> BoxFuture<'_, Result<StartedExecution, GatewayError>> {
         self.trace.starts.fetch_add(1, Ordering::AcqRel);
+        if let Operation::Generate(generate) = &request.operation
+            && let Some(connection_id) = generate
+                .protocol_payload()
+                .context()
+                .get("downstream_websocket_connection_id")
+                .and_then(Value::as_str)
+        {
+            self.trace
+                .downstream_websocket_connection_ids
+                .lock()
+                .expect("downstream connection trace lock")
+                .push(connection_id.to_owned());
+        }
         Box::pin(async move {
             Ok(StartedExecution {
                 request_id: gateway_core::engine::ModelRequestId::new("req_ws_atomic")
@@ -374,6 +397,7 @@ impl ExecutionService for AtomicFailureExecution {
                 session: Box::new(AtomicFailureSession {
                     trace: Arc::clone(&self.trace),
                     response_headers: self.response_headers.clone(),
+                    fail_before_first_event: self.fail_before_first_event,
                 }),
             })
         })
@@ -439,6 +463,7 @@ async fn websocket_atomic_upstream_failure_batch_should_be_forwarded_once() {
         client: authenticated_client("sk_ws_atomic"),
         trace: Arc::clone(&trace),
         response_headers: Vec::new(),
+        fail_before_first_event: false,
     });
     let app = api_router(execution).await;
     let listener = tokio::net::TcpListener::bind("127.0.0.1:0")
@@ -510,6 +535,14 @@ async fn websocket_atomic_upstream_failure_batch_should_be_forwarded_once() {
     assert!(trace.committed.load(Ordering::Acquire));
     assert_eq!(trace.next_calls.load(Ordering::Acquire), 2);
     assert!(trace.finalized.load(Ordering::Acquire));
+    {
+        let downstream_connection_ids = trace
+            .downstream_websocket_connection_ids
+            .lock()
+            .expect("downstream connection trace lock");
+        assert_eq!(downstream_connection_ids.len(), 1);
+        assert!(downstream_connection_ids[0].starts_with("ws_"));
+    }
 
     socket.close(None).await.expect("close WebSocket");
     server.abort();
@@ -540,6 +573,7 @@ async fn websocket_response_metadata_should_preserve_ordinary_headers_without_bl
             ProviderResponseHeader::new("content-type", Bytes::from_static(b"application/private")),
             ProviderResponseHeader::new("x-request-id", Bytes::from_static(b"req_upstream")),
         ],
+        fail_before_first_event: false,
     });
     let app = api_router(execution).await;
     let listener = tokio::net::TcpListener::bind("127.0.0.1:0")
@@ -624,6 +658,91 @@ async fn websocket_response_metadata_should_preserve_ordinary_headers_without_bl
     server.abort();
 }
 
+#[tokio::test]
+async fn websocket_failure_before_first_event_should_return_observed_metadata_then_error() {
+    let trace = Arc::new(AtomicFailureTrace::default());
+    let execution = Arc::new(AtomicFailureExecution {
+        client: authenticated_client("sk_ws_atomic"),
+        trace: Arc::clone(&trace),
+        response_headers: vec![
+            ProviderResponseHeader::new(
+                "x-codex-turn-state",
+                Bytes::from_static(b"turn-state-before-close"),
+            ),
+            ProviderResponseHeader::new(
+                "authorization",
+                Bytes::from_static(b"must-not-cross-boundary"),
+            ),
+        ],
+        fail_before_first_event: true,
+    });
+    let app = api_router(execution).await;
+    let listener = tokio::net::TcpListener::bind("127.0.0.1:0")
+        .await
+        .expect("bind WebSocket test server");
+    let address = listener.local_addr().expect("test server address");
+    let server = tokio::spawn(async move {
+        axum::serve(listener, app)
+            .await
+            .expect("serve WebSocket test router");
+    });
+    let mut request = format!("ws://{address}/v1/responses")
+        .into_client_request()
+        .expect("WebSocket request");
+    request.headers_mut().insert(
+        AUTHORIZATION,
+        "Bearer sk_ws_atomic".parse().expect("authorization"),
+    );
+    let (mut socket, response) = connect_async(request).await.expect("upgrade WebSocket");
+    assert_eq!(response.status(), StatusCode::SWITCHING_PROTOCOLS);
+    socket
+        .send(ClientMessage::Text(
+            json!({
+                "type": "response.create",
+                "model": "model-a",
+                "input": "hello"
+            })
+            .to_string()
+            .into(),
+        ))
+        .await
+        .expect("send response.create");
+
+    let mut messages = Vec::<Value>::new();
+    while messages.len() < 2 {
+        let message = tokio::time::timeout(Duration::from_secs(2), socket.next())
+            .await
+            .expect("WebSocket response timeout")
+            .expect("WebSocket remains open")
+            .expect("valid WebSocket frame");
+        let ClientMessage::Text(text) = message else {
+            continue;
+        };
+        messages.push(serde_json::from_str(&text).expect("JSON WebSocket event"));
+    }
+
+    assert_eq!(
+        messages
+            .iter()
+            .filter_map(|message| message.get("type").and_then(Value::as_str))
+            .collect::<Vec<_>>(),
+        vec!["response.metadata", "error"]
+    );
+    let headers = messages[0]
+        .get("headers")
+        .and_then(Value::as_object)
+        .expect("response metadata headers");
+    assert_eq!(
+        headers.get("x-codex-turn-state"),
+        Some(&json!("turn-state-before-close"))
+    );
+    assert!(!headers.contains_key("authorization"));
+    assert!(!trace.committed.load(Ordering::Acquire));
+
+    socket.close(None).await.expect("close WebSocket");
+    server.abort();
+}
+
 #[tokio::test]
 async fn websocket_response_create_should_not_have_a_private_16_mib_frame_limit() {
     let trace = Arc::new(AtomicFailureTrace::default());
@@ -631,6 +750,7 @@ async fn websocket_response_create_should_not_have_a_private_16_mib_frame_limit(
         client: authenticated_client("sk_ws_atomic"),
         trace,
         response_headers: Vec::new(),
+        fail_before_first_event: false,
     });
     let app = api_router(execution).await;
     let listener = tokio::net::TcpListener::bind("127.0.0.1:0")

backend/crates/gateway-api/tests/openai/router.rs

@@ -1,6 +1,6 @@
 use axum::{
     body::Body,
-    http::{Method, Request, StatusCode},
+    http::{Method, Request, StatusCode, header::AUTHORIZATION},
 };
 use tower::ServiceExt;
 
@@ -9,6 +9,54 @@ use super::models::ModelsExecution;
 
 const REMOVED_BODY_LIMIT_BYTES: usize = 16 * 1024 * 1024;
 
+#[tokio::test]
+async fn removed_responses_review_route_should_not_reach_the_responses_handler() {
+    let response = api_router_with_origins(ModelsExecution::new(), Vec::new())
+        .await
+        .oneshot(
+            Request::post("/v1/responses/review")
+                .header(AUTHORIZATION, "Bearer sk_models_test")
+                .body(Body::empty())
+                .expect("build removed review request"),
+        )
+        .await
+        .expect("route removed review request");
+
+    assert_eq!(response.status(), StatusCode::METHOD_NOT_ALLOWED);
+}
+
+#[tokio::test]
+async fn removed_models_catalog_extension_should_use_standard_model_lookup() {
+    let response = api_router_with_origins(ModelsExecution::new(), Vec::new())
+        .await
+        .oneshot(
+            Request::get("/v1/models/catalog")
+                .header(AUTHORIZATION, "Bearer sk_models_test")
+                .body(Body::empty())
+                .expect("build removed model catalog request"),
+        )
+        .await
+        .expect("route removed model catalog request");
+
+    assert_eq!(response.status(), StatusCode::NOT_FOUND);
+}
+
+#[tokio::test]
+async fn removed_model_info_route_should_return_not_found() {
+    let response = api_router_with_origins(ModelsExecution::new(), Vec::new())
+        .await
+        .oneshot(
+            Request::get("/v1/models/model-a/info")
+                .header(AUTHORIZATION, "Bearer sk_models_test")
+                .body(Body::empty())
+                .expect("build removed model info request"),
+        )
+        .await
+        .expect("route removed model info request");
+
+    assert_eq!(response.status(), StatusCode::NOT_FOUND);
+}
+
 #[tokio::test]
 async fn responses_body_should_accept_payload_above_the_removed_private_limit() {
     let router = api_router_with_origins(ModelsExecution::new(), Vec::new()).await;

backend/crates/gateway-api/tests/openai/search/mod.rs

@@ -0,0 +1,234 @@
+use std::sync::{Arc, Mutex};
+use std::time::SystemTime;
+
+use axum::{
+    body::{Body, to_bytes},
+    http::{Request, StatusCode, header::AUTHORIZATION},
+};
+use bytes::Bytes;
+use futures::future::BoxFuture;
+use gateway_core::engine::ModelRequestId;
+use gateway_core::engine::execution::{
+    AuthenticatedClient, ClientAuthenticationError, ClientTransport, ExecutionService,
+    StartExecution, StartProviderExecution, StartedExecution,
+};
+use gateway_core::error::{
+    ClientVisibleUpstreamResponse, GatewayError, GatewayErrorKind, ProviderError, ProviderErrorKind,
+};
+use gateway_core::event::ProviderResponseHeader;
+use gateway_core::operation::Operation;
+use gateway_core::routing::PublicModelId;
+use gateway_core::upstream::UpstreamSendState;
+use serde_json::{Value, json};
+use tower::ServiceExt;
+
+use super::endpoint::BufferedJsonSession;
+use super::{api_router, authenticated_client};
+
+const SEARCH_RESPONSE: &[u8] = br#"{ "encrypted_output":"ciphertext", "output":"search result", "results":[{"type":"text_result","ref_id":"turn0search0","future":9007199254740993}] }"#;
+
+#[derive(Debug, Clone, PartialEq)]
+struct CapturedSearchRequest {
+    provider: String,
+    endpoint: String,
+    transport: ClientTransport,
+    body: Bytes,
+    context: Value,
+}
+
+struct SearchExecution {
+    client: AuthenticatedClient,
+    captured: Mutex<Vec<CapturedSearchRequest>>,
+    committed_statuses: Arc<Mutex<Vec<u16>>>,
+    fail_with_upstream_response: bool,
+}
+
+impl SearchExecution {
+    fn new(fail_with_upstream_response: bool) -> Arc<Self> {
+        Arc::new(Self {
+            client: authenticated_client("sk_search_test"),
+            captured: Mutex::new(Vec::new()),
+            committed_statuses: Arc::new(Mutex::new(Vec::new())),
+            fail_with_upstream_response,
+        })
+    }
+
+    fn captured(&self) -> Vec<CapturedSearchRequest> {
+        self.captured.lock().expect("capture lock").clone()
+    }
+}
+
+impl ExecutionService for SearchExecution {
+    fn authenticate(
+        &self,
+        plaintext: &str,
+    ) -> Result<AuthenticatedClient, ClientAuthenticationError> {
+        (plaintext == "sk_search_test")
+            .then(|| self.client.clone())
+            .ok_or(ClientAuthenticationError::InvalidKey)
+    }
+
+    fn public_models(&self, _: &AuthenticatedClient) -> Vec<PublicModelId> {
+        Vec::new()
+    }
+
+    fn contains_public_model(&self, _: &AuthenticatedClient, _: &PublicModelId) -> bool {
+        false
+    }
+
+    fn start(&self, _: StartExecution) -> BoxFuture<'_, Result<StartedExecution, GatewayError>> {
+        Box::pin(async {
+            Err(GatewayError::new(
+                GatewayErrorKind::Internal,
+                "search test must use provider endpoint execution",
+            ))
+        })
+    }
+
+    fn start_provider_endpoint(
+        &self,
+        request: StartProviderExecution,
+    ) -> BoxFuture<'_, Result<StartedExecution, GatewayError>> {
+        Box::pin(async move {
+            let Operation::Search(search) = &request.operation else {
+                return Err(GatewayError::new(
+                    GatewayErrorKind::Internal,
+                    "search test received a non-search operation",
+                ));
+            };
+            let payload = search.payload();
+            self.captured
+                .lock()
+                .expect("capture lock")
+                .push(CapturedSearchRequest {
+                    provider: request.provider.as_str().to_owned(),
+                    endpoint: request.metadata.endpoint,
+                    transport: request.metadata.transport,
+                    body: payload.body().clone(),
+                    context: Value::Object(payload.context().clone()),
+                });
+            let session = if self.fail_with_upstream_response {
+                BufferedJsonSession::failure(
+                    ProviderError::new(
+                        ProviderErrorKind::InvalidRequest,
+                        UpstreamSendState::Sent,
+                    )
+                    .with_status(StatusCode::UNPROCESSABLE_ENTITY.as_u16())
+                    .with_client_visible_upstream_response(
+                        ClientVisibleUpstreamResponse::new(
+                            StatusCode::UNPROCESSABLE_ENTITY.as_u16(),
+                            Some(b"application/problem+json".to_vec()),
+                            Bytes::from_static(
+                                br#"{ "error":{"message":"future search validation"}, "future":9007199254740993 }"#,
+                            ),
+                        )
+                        .with_headers(vec![ProviderResponseHeader::new(
+                            "x-future-search-error",
+                            Bytes::from_static(b"preserved"),
+                        )]),
+                    ),
+                )
+            } else {
+                BufferedJsonSession::success(
+                    Bytes::from_static(SEARCH_RESPONSE),
+                    StatusCode::CREATED.as_u16(),
+                    vec![ProviderResponseHeader::new(
+                        "x-search-rate-limit",
+                        Bytes::from_static(b"42"),
+                    )],
+                    Arc::clone(&self.committed_statuses),
+                )
+            };
+            Ok(StartedExecution {
+                request_id: ModelRequestId::new("req_search_test").expect("request ID"),
+                created_at: SystemTime::now(),
+                stream: false,
+                session: Box::new(session),
+            })
+        })
+    }
+}
+
+#[tokio::test]
+async fn search_route_should_preserve_request_and_success_response_bytes() {
+    let execution = SearchExecution::new(false);
+    let request_body = br#"{ "id":"search-session", "model":"gpt-future", "commands":{"search_query":[{"q":"private query"}]}, "future":1, "future":2 }"#;
+    let turn_metadata =
+        r#"{"session_id":"session","thread_id":"thread","turn_id":"turn","future":true}"#;
+    let response = api_router(execution.clone())
+        .await
+        .oneshot(
+            Request::post("/v1/alpha/search")
+                .header(AUTHORIZATION, "Bearer sk_search_test")
+                .header("content-type", "application/json")
+                .header("x-codex-turn-metadata", turn_metadata)
+                .header("session-id", "root-session")
+                .header("thread-id", "child-thread")
+                .body(Body::from(request_body.to_vec()))
+                .expect("search request"),
+        )
+        .await
+        .expect("search response");
+
+    assert_eq!(response.status(), StatusCode::CREATED);
+    assert_eq!(
+        response.headers().get("x-search-rate-limit"),
+        Some(&"42".parse().expect("header value"))
+    );
+    let response_body = to_bytes(response.into_body(), usize::MAX)
+        .await
+        .expect("read search response");
+    assert_eq!(response_body.as_ref(), SEARCH_RESPONSE);
+
+    let captured = execution.captured();
+    assert_eq!(captured.len(), 1);
+    assert_eq!(captured[0].provider, "openai");
+    assert_eq!(captured[0].endpoint, "/v1/alpha/search");
+    assert_eq!(captured[0].transport, ClientTransport::HttpJson);
+    assert_eq!(captured[0].body.as_ref(), request_body);
+    assert_eq!(
+        captured[0].context,
+        json!({"turn_metadata": turn_metadata, "session_id": "root-session", "thread_id": "child-thread"})
+    );
+    assert_eq!(
+        *execution
+            .committed_statuses
+            .lock()
+            .expect("committed status lock"),
+        vec![StatusCode::CREATED.as_u16()]
+    );
+}
+
+#[tokio::test]
+async fn search_route_should_return_the_exact_upstream_error_response() {
+    let response = api_router(SearchExecution::new(true))
+        .await
+        .oneshot(
+            Request::post("/v1/alpha/search")
+                .header(AUTHORIZATION, "Bearer sk_search_test")
+                .header("content-type", "application/json")
+                .body(Body::from(
+                    br#"{ "model":"gpt-future", "future_invalid":9007199254740993 }"#.to_vec(),
+                ))
+                .expect("search request"),
+        )
+        .await
+        .expect("search response");
+
+    assert_eq!(response.status(), StatusCode::UNPROCESSABLE_ENTITY);
+    assert_eq!(
+        response.headers().get("content-type"),
+        Some(&"application/problem+json".parse().expect("content type"))
+    );
+    assert_eq!(
+        response.headers().get("x-future-search-error"),
+        Some(&"preserved".parse().expect("header value"))
+    );
+    let body = to_bytes(response.into_body(), usize::MAX)
+        .await
+        .expect("read search response");
+    assert_eq!(
+        body.as_ref(),
+        br#"{ "error":{"message":"future search validation"}, "future":9007199254740993 }"#
+    );
+}

backend/crates/gateway-core/Cargo.toml

@@ -2,7 +2,7 @@
 name = "gateway-core"
 version = "0.1.0"
 edition = "2024"
-license = "MIT"
+license = "Apache-2.0"
 publish = false
 rust-version = "1.97"
 autotests = false
@@ -13,15 +13,18 @@ path = "tests/main.rs"
 
 [dependencies]
 async-trait = "0.1.89"
+base64 = "0.23.0"
 bytes = "1.11.1"
 futures = "0.3.32"
 futures-timer = "3.0.3"
 serde = { version = "1.0.228", features = ["derive"] }
 serde_json = { version = "1.0.150", features = ["arbitrary_precision", "preserve_order"] }
+sha2 = "0.11.0"
 semver = "1.0.27"
 thiserror = "2.0.18"
 tracing = "0.1.44"
 uuid = { version = "1.23.3", features = ["v7"] }
+url = "2.5.8"
 
 [lints]
 workspace = true

backend/crates/gateway-core/src/account/mod.rs

@@ -2,10 +2,14 @@
 
 mod error;
 mod model;
+mod proxy;
+pub use proxy::{InvalidOutboundProxy, OutboundProxy};
+pub mod scope;
 mod selection;
 mod store;
 
 pub use error::CredentialError;
 pub use model::*;
 pub use selection::*;
+pub(crate) use selection::{SMART_SCORE_TOLERANCE, smart_score};
 pub use store::ProviderAccountStore;

backend/crates/gateway-core/src/account/model.rs

@@ -6,8 +6,8 @@ use std::time::{Duration, SystemTime};
 
 use serde_json::{Map, Value};
 
-use crate::error::{IdentifierError, validate_text};
-use crate::routing::ProviderKind;
+use crate::identity::ProviderKind;
+use crate::validation::{IdentifierError, validate_text};
 
 use super::CredentialError;
 
@@ -654,7 +654,7 @@ const fn status_projection(status: AccountStatus) -> AccountStatusProjection {
     }
 }
 
-/// 不含 secret 的账号持久事实。
+/// 账号持久事实；代理认证信息只通过显式 secret accessor 读取。
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct ProviderAccount {
     id: ProviderAccountId,
@@ -676,6 +676,7 @@ pub struct ProviderAccount {
     access_token_expires_at: Option<SystemTime>,
     next_refresh_at: Option<SystemTime>,
     has_refresh_token: bool,
+    outbound_proxy: Option<super::OutboundProxy>,
 }
 
 impl ProviderAccount {
@@ -710,6 +711,7 @@ impl ProviderAccount {
             access_token_expires_at,
             next_refresh_at: None,
             has_refresh_token: false,
+            outbound_proxy: None,
         }
     }
 
@@ -726,6 +728,17 @@ impl ProviderAccount {
         self
     }
 
+    #[must_use]
+    pub fn with_outbound_proxy(mut self, proxy: Option<super::OutboundProxy>) -> Self {
+        self.outbound_proxy = proxy;
+        self
+    }
+
+    #[must_use]
+    pub const fn outbound_proxy(&self) -> Option<&super::OutboundProxy> {
+        self.outbound_proxy.as_ref()
+    }
+
     #[must_use]
     pub fn with_account_facts(
         mut self,

backend/crates/gateway-core/src/account/proxy.rs

@@ -0,0 +1,49 @@
+//! Explicit account egress. Credentials never appear in Debug or ordinary admin projections.
+
+use std::fmt;
+use url::Url;
+
+#[derive(Clone, PartialEq, Eq, Hash)]
+pub struct OutboundProxy(Url);
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, thiserror::Error)]
+#[error("invalid outbound proxy; expected http, https, socks5 or socks5h URL with a host and port")]
+pub struct InvalidOutboundProxy;
+
+impl OutboundProxy {
+    pub fn parse(value: &str) -> Result<Self, InvalidOutboundProxy> {
+        if value.len() > 4096 || value.chars().any(char::is_control) {
+            return Err(InvalidOutboundProxy);
+        }
+        let url = Url::parse(value).map_err(|_| InvalidOutboundProxy)?;
+        if !matches!(url.scheme(), "http" | "https" | "socks5" | "socks5h")
+            || url.host_str().is_none()
+            || url.port_or_known_default().is_none_or(|port| port == 0)
+            || !matches!(url.path(), "" | "/")
+            || url.query().is_some()
+            || url.fragment().is_some()
+        {
+            return Err(InvalidOutboundProxy);
+        }
+        Ok(Self(url))
+    }
+
+    #[must_use]
+    pub fn expose_url(&self) -> &str {
+        self.0.as_str()
+    }
+
+    #[must_use]
+    pub fn endpoint(&self) -> String {
+        let mut url = self.0.clone();
+        let _ = url.set_username("");
+        let _ = url.set_password(None);
+        url.to_string()
+    }
+}
+
+impl fmt::Debug for OutboundProxy {
+    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
+        formatter.write_str("OutboundProxy(<redacted>)")
+    }
+}

backend/crates/gateway-core/src/account/scope.rs

@@ -0,0 +1,291 @@
+//! 请求认证时冻结的账号范围与目录，不依赖路由选择器。
+
+use super::ProviderAccountId;
+use crate::identity::ProviderKind;
+use crate::validation::{IdentifierError, RoutingError};
+use std::{
+    collections::{BTreeMap, BTreeSet},
+    fmt,
+    sync::Arc,
+};
+
+/// `account_groups.id` 的核心值对象。
+#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct AccountGroupId(String);
+
+impl AccountGroupId {
+    /// 校验并创建账号分组 ID。
+    pub fn new(value: impl Into<String>) -> Result<Self, IdentifierError> {
+        let value = value.into();
+        let Some(suffix) = value.strip_prefix("grp_") else {
+            return Err(IdentifierError::MissingPrefix { expected: "grp_" });
+        };
+        if suffix.len() != 32
+            || !suffix
+                .bytes()
+                .all(|byte| byte.is_ascii_digit() || (b'a'..=b'f').contains(&byte))
+        {
+            return Err(IdentifierError::InvalidFormat);
+        }
+        Ok(Self(value))
+    }
+
+    #[must_use]
+    pub fn as_str(&self) -> &str {
+        &self.0
+    }
+}
+
+impl fmt::Display for AccountGroupId {
+    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
+        formatter.write_str(&self.0)
+    }
+}
+
+/// 快照中一个账号的 Provider 与分组归属。
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct RuntimeAccount {
+    provider_kind: ProviderKind,
+    group_ids: Arc<BTreeSet<AccountGroupId>>,
+}
+
+impl RuntimeAccount {
+    #[must_use]
+    pub fn new(provider_kind: ProviderKind, group_ids: BTreeSet<AccountGroupId>) -> Self {
+        Self {
+            provider_kind,
+            group_ids: Arc::new(group_ids),
+        }
+    }
+
+    #[must_use]
+    pub const fn provider_kind(&self) -> &ProviderKind {
+        &self.provider_kind
+    }
+
+    #[must_use]
+    pub fn group_ids(&self) -> &BTreeSet<AccountGroupId> {
+        &self.group_ids
+    }
+}
+
+/// 全快照共享的账号、Provider 与分组反向索引。
+#[derive(Debug, Clone, Default, PartialEq, Eq)]
+pub struct RuntimeAccountDirectory {
+    accounts: BTreeMap<ProviderAccountId, RuntimeAccount>,
+    providers_with_accounts: BTreeSet<ProviderKind>,
+    providers_by_group: BTreeMap<AccountGroupId, BTreeSet<ProviderKind>>,
+}
+
+impl RuntimeAccountDirectory {
+    #[must_use]
+    pub fn new(accounts: BTreeMap<ProviderAccountId, RuntimeAccount>) -> Self {
+        let mut providers_with_accounts = BTreeSet::new();
+        let mut providers_by_group = BTreeMap::<AccountGroupId, BTreeSet<ProviderKind>>::new();
+        for account in accounts.values() {
+            providers_with_accounts.insert(account.provider_kind.clone());
+            for group_id in account.group_ids.iter() {
+                providers_by_group
+                    .entry(group_id.clone())
+                    .or_default()
+                    .insert(account.provider_kind.clone());
+            }
+        }
+        Self {
+            accounts,
+            providers_with_accounts,
+            providers_by_group,
+        }
+    }
+
+    #[must_use]
+    pub fn account(&self, account_id: &ProviderAccountId) -> Option<&RuntimeAccount> {
+        self.accounts.get(account_id)
+    }
+
+    #[must_use]
+    pub fn providers_with_accounts(&self) -> &BTreeSet<ProviderKind> {
+        &self.providers_with_accounts
+    }
+
+    #[must_use]
+    pub fn providers_for_groups<'a>(
+        &self,
+        group_ids: impl IntoIterator<Item = &'a AccountGroupId>,
+    ) -> BTreeSet<ProviderKind> {
+        group_ids
+            .into_iter()
+            .filter_map(|group_id| self.providers_by_group.get(group_id))
+            .flatten()
+            .cloned()
+            .collect()
+    }
+}
+
+/// 历史请求保存的账号范围种类。
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum AccountRoutingScopeKind {
+    All,
+    Groups,
+}
+
+impl AccountRoutingScopeKind {
+    #[must_use]
+    pub const fn as_str(self) -> &'static str {
+        match self {
+            Self::All => "all",
+            Self::Groups => "groups",
+        }
+    }
+}
+
+/// 请求开始时冻结的分组 ID 与名称。
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct RoutingGroupSnapshot {
+    id: AccountGroupId,
+    name: String,
+}
+
+impl RoutingGroupSnapshot {
+    #[must_use]
+    pub fn new(id: AccountGroupId, name: String) -> Self {
+        Self { id, name }
+    }
+
+    #[must_use]
+    pub const fn id(&self) -> &AccountGroupId {
+        &self.id
+    }
+
+    #[must_use]
+    pub fn name(&self) -> &str {
+        &self.name
+    }
+}
+
+/// 请求历史所需的完整、稳定账号范围快照。
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct AccountRoutingSnapshot {
+    kind: AccountRoutingScopeKind,
+    groups: Arc<[RoutingGroupSnapshot]>,
+}
+
+impl AccountRoutingSnapshot {
+    #[must_use]
+    pub fn all() -> Self {
+        Self {
+            kind: AccountRoutingScopeKind::All,
+            groups: Arc::from([]),
+        }
+    }
+
+    #[must_use]
+    pub fn groups(groups: Vec<RoutingGroupSnapshot>) -> Self {
+        Self {
+            kind: AccountRoutingScopeKind::Groups,
+            groups: Arc::from(groups),
+        }
+    }
+
+    #[must_use]
+    pub const fn kind(&self) -> AccountRoutingScopeKind {
+        self.kind
+    }
+
+    #[must_use]
+    pub fn groups_snapshot(&self) -> &[RoutingGroupSnapshot] {
+        &self.groups
+    }
+}
+
+/// Key 持久 binding 编译出的账号权限。
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum ClientRoutingScope {
+    AllAccounts,
+    Restricted {
+        bound_groups: Arc<[RoutingGroupSnapshot]>,
+        enabled_group_ids: Arc<BTreeSet<AccountGroupId>>,
+        provider_kinds: Arc<BTreeSet<ProviderKind>>,
+    },
+}
+
+impl ClientRoutingScope {
+    #[must_use]
+    pub fn all_accounts() -> Self {
+        Self::AllAccounts
+    }
+
+    pub fn restricted(
+        bound_groups: Vec<RoutingGroupSnapshot>,
+        enabled_group_ids: BTreeSet<AccountGroupId>,
+        provider_kinds: BTreeSet<ProviderKind>,
+    ) -> Result<Self, RoutingError> {
+        if bound_groups.is_empty() {
+            return Err(RoutingError::InvalidAccountScope);
+        }
+        Ok(Self::Restricted {
+            bound_groups: Arc::from(bound_groups),
+            enabled_group_ids: Arc::new(enabled_group_ids),
+            provider_kinds: Arc::new(provider_kinds),
+        })
+    }
+}
+
+/// 一次认证随 RuntimeSnapshot 冻结的账号目录与 Key 权限。
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct FrozenAccountScope {
+    directory: Arc<RuntimeAccountDirectory>,
+    client_scope: ClientRoutingScope,
+}
+
+impl FrozenAccountScope {
+    #[must_use]
+    pub const fn new(
+        directory: Arc<RuntimeAccountDirectory>,
+        client_scope: ClientRoutingScope,
+    ) -> Self {
+        Self {
+            directory,
+            client_scope,
+        }
+    }
+
+    #[must_use]
+    pub fn allows(&self, account_id: &ProviderAccountId) -> bool {
+        let Some(account) = self.directory.account(account_id) else {
+            return false;
+        };
+        match &self.client_scope {
+            ClientRoutingScope::AllAccounts => true,
+            ClientRoutingScope::Restricted {
+                enabled_group_ids, ..
+            } => account
+                .group_ids()
+                .iter()
+                .any(|group_id| enabled_group_ids.contains(group_id)),
+        }
+    }
+
+    #[must_use]
+    pub fn provider_kinds(&self) -> &BTreeSet<ProviderKind> {
+        match &self.client_scope {
+            ClientRoutingScope::AllAccounts => self.directory.providers_with_accounts(),
+            ClientRoutingScope::Restricted { provider_kinds, .. } => provider_kinds,
+        }
+    }
+
+    #[must_use]
+    pub fn routing_snapshot(&self) -> AccountRoutingSnapshot {
+        match &self.client_scope {
+            ClientRoutingScope::AllAccounts => AccountRoutingSnapshot::all(),
+            ClientRoutingScope::Restricted { bound_groups, .. } => {
+                AccountRoutingSnapshot::groups(bound_groups.to_vec())
+            }
+        }
+    }
+
+    #[must_use]
+    pub const fn directory(&self) -> &Arc<RuntimeAccountDirectory> {
+        &self.directory
+    }
+}

backend/crates/gateway-core/src/account/selection.rs

@@ -7,7 +7,7 @@ use std::sync::atomic::{AtomicU64, Ordering};
 use std::sync::{Mutex, RwLock};
 use std::time::{Duration, Instant, SystemTime};
 
-use crate::routing::ProviderKind;
+use crate::identity::ProviderKind;
 
 use super::{AccountStatus, ProviderAccount, ProviderAccountId};
 
@@ -87,6 +87,7 @@ pub struct AccountRuntimeSignals {
     pub in_flight: u32,
     pub last_started_at: Option<SystemTime>,
     pub quota_reset_at: Option<SystemTime>,
+    /// Provider 归一化的剩余额度基点：0 耗尽，10_000 全部可用。
     pub quota_remaining_rank: Option<u64>,
     pub rate_limited_until: Option<SystemTime>,
     pub failure_rate_basis_points: Option<u16>,
@@ -323,6 +324,7 @@ pub struct AccountQuotaSignals {
 }
 
 impl AccountQuotaSignals {
+    /// `remaining_rank` 使用剩余额度基点，范围为 0..=10_000。
     #[must_use]
     pub const fn new(reset_at: Option<SystemTime>, remaining_rank: Option<u64>) -> Self {
         Self {
@@ -386,9 +388,11 @@ pub struct AccountSelectionContext {
     pub now: SystemTime,
     pub excluded_accounts: BTreeSet<ProviderAccountId>,
     pub preferred_account: Option<ProviderAccountId>,
+    /// 优先账号可调度时，是否优先于其它账号的持久权重。
+    pub preferred_account_overrides_weight: bool,
     pub round_robin_cursor: u64,
     pub eligibility: AccountEligibilityPolicy,
-    pub account_scope: Option<std::sync::Arc<crate::routing::FrozenAccountScope>>,
+    pub account_scope: Option<std::sync::Arc<crate::account::scope::FrozenAccountScope>>,
 }
 
 /// 选择账号时是否执行本地调度资格投影。
@@ -516,7 +520,9 @@ impl AccountSelector {
             {
                 Some(candidate) => match self.scheduling_blocker(candidate, context) {
                     Some(blocker) => PreferredAccountSelection::Blocked(blocker),
-                    None if candidate.account.weight() < highest_weight => {
+                    None if !context.preferred_account_overrides_weight
+                        && candidate.account.weight() < highest_weight =>
+                    {
                         PreferredAccountSelection::Blocked(AccountSchedulingBlocker::LowerWeight)
                     }
                     None => {
@@ -584,7 +590,7 @@ impl AccountSelector {
         })
     }
 
-    fn scheduling_blocker(
+    pub(crate) fn scheduling_blocker(
         &self,
         candidate: &AccountCandidate,
         context: &AccountSelectionContext,
@@ -636,6 +642,10 @@ const SMART_LOAD_WEIGHT: f64 = 1.0;
 const SMART_QUOTA_WEIGHT: f64 = 0.8;
 const SMART_FAILURE_WEIGHT: f64 = 1.0;
 const SMART_LATENCY_WEIGHT: f64 = 0.5;
+// 容忍 5 个百分点的单项负载/失败率差异，避免微小信号波动独占新会话。
+pub(crate) const SMART_SCORE_TOLERANCE: f64 = 0.05;
+// 首输出 10 秒时延迟得分减半；固定尺度不随其他候选账号变化。
+const SMART_LATENCY_HALF_SCORE_MS: f64 = 10_000.0;
 
 fn capacity_utilization(candidate: &AccountCandidate, default_concurrency: NonZeroU32) -> f64 {
     f64::from(candidate.signals.in_flight)
@@ -647,94 +657,32 @@ fn capacity_utilization(candidate: &AccountCandidate, default_concurrency: NonZe
         )
 }
 
-struct SmartNormalization {
-    max_capacity_utilization: f64,
-    min_quota: Option<u64>,
-    max_quota: Option<u64>,
-    min_latency_ms: Option<u64>,
-    max_latency_ms: Option<u64>,
-}
-
-impl SmartNormalization {
-    fn from_candidates(candidates: &[&AccountCandidate], default_concurrency: NonZeroU32) -> Self {
-        let max_capacity_utilization = candidates
-            .iter()
-            .map(|candidate| capacity_utilization(candidate, default_concurrency))
-            .reduce(f64::max)
-            .unwrap_or_default();
-        let min_quota = candidates
-            .iter()
-            .filter_map(|candidate| candidate.signals.quota_remaining_rank)
-            .min();
-        let max_quota = candidates
-            .iter()
-            .filter_map(|candidate| candidate.signals.quota_remaining_rank)
-            .max();
-        let min_latency_ms = candidates
-            .iter()
-            .filter_map(|candidate| candidate.signals.first_output_latency_ms)
-            .filter(|latency| *latency > 0)
-            .min();
-        let max_latency_ms = candidates
-            .iter()
-            .filter_map(|candidate| candidate.signals.first_output_latency_ms)
-            .filter(|latency| *latency > 0)
-            .max();
-        Self {
-            max_capacity_utilization,
-            min_quota,
-            max_quota,
-            min_latency_ms,
-            max_latency_ms,
-        }
-    }
-}
-
 fn select_smart_candidate<'a>(
     candidates: &[&'a AccountCandidate],
     default_concurrency: NonZeroU32,
     cursor: u64,
 ) -> Option<&'a AccountCandidate> {
-    let normalization = SmartNormalization::from_candidates(candidates, default_concurrency);
     let mut ranked = candidates
         .iter()
-        .map(|candidate| {
-            (
-                *candidate,
-                smart_score(candidate, default_concurrency, &normalization),
-            )
-        })
+        .map(|candidate| (*candidate, smart_score(candidate, default_concurrency)))
         .collect::<Vec<_>>();
-    ranked.sort_by(|(left, left_score), (right, right_score)| {
-        right_score
-            .total_cmp(left_score)
-            .then_with(|| left.account.id().cmp(right.account.id()))
-    });
-    let best_score = ranked.first()?.1.to_bits();
-    let tied = ranked
+    let best_score = ranked
         .iter()
-        .take_while(|(_, score)| score.to_bits() == best_score)
-        .count();
-    let index = cursor as usize % tied;
+        .map(|(_, score)| *score)
+        .max_by(f64::total_cmp)?;
+    ranked.retain(|(_, score)| best_score - score <= SMART_SCORE_TOLERANCE);
+    // 轮换顺序保持稳定，避免分数轻微交错与 cursor 同步后仍反复命中同一账号。
+    ranked.sort_unstable_by(|(left, _), (right, _)| left.account.id().cmp(right.account.id()));
+    let index = (cursor % ranked.len() as u64) as usize;
     Some(ranked[index].0)
 }
 
-fn smart_score(
-    candidate: &AccountCandidate,
-    default_concurrency: NonZeroU32,
-    normalization: &SmartNormalization,
-) -> f64 {
-    let load = lower_ratio_is_better(
-        capacity_utilization(candidate, default_concurrency),
-        normalization.max_capacity_utilization,
-    );
-    let quota = candidate.signals.quota_remaining_rank.map_or(0.5, |quota| {
-        higher_is_better(
-            quota,
-            normalization.min_quota.unwrap_or(quota),
-            normalization.max_quota.unwrap_or(quota),
-        )
-    });
+pub(crate) fn smart_score(candidate: &AccountCandidate, default_concurrency: NonZeroU32) -> f64 {
+    let load = 1.0 - capacity_utilization(candidate, default_concurrency).clamp(0.0, 1.0);
+    let quota = candidate
+        .signals
+        .quota_remaining_rank
+        .map_or(0.5, |quota| quota.min(10_000) as f64 / 10_000.0);
     let failure = 1.0
         - f64::from(
             candidate
@@ -748,11 +696,7 @@ fn smart_score(
         .first_output_latency_ms
         .filter(|latency| *latency > 0)
         .map_or(1.0, |latency| {
-            lower_is_better(
-                latency,
-                normalization.min_latency_ms.unwrap_or(latency),
-                normalization.max_latency_ms.unwrap_or(latency),
-            )
+            SMART_LATENCY_HALF_SCORE_MS / (SMART_LATENCY_HALF_SCORE_MS + latency as f64)
         });
 
     SMART_LOAD_WEIGHT * load
@@ -760,24 +704,3 @@ fn smart_score(
         + SMART_FAILURE_WEIGHT * failure
         + SMART_LATENCY_WEIGHT * latency
 }
-
-fn lower_ratio_is_better(value: f64, maximum: f64) -> f64 {
-    if maximum <= 0.0 {
-        return 1.0;
-    }
-    1.0 - (value / maximum).clamp(0.0, 1.0)
-}
-
-fn lower_is_better(value: u64, minimum: u64, maximum: u64) -> f64 {
-    if maximum <= minimum {
-        return 1.0;
-    }
-    1.0 - (value.saturating_sub(minimum) as f64 / (maximum - minimum) as f64).clamp(0.0, 1.0)
-}
-
-fn higher_is_better(value: u64, minimum: u64, maximum: u64) -> f64 {
-    if maximum <= minimum {
-        return 1.0;
-    }
-    (value.saturating_sub(minimum) as f64 / (maximum - minimum) as f64).clamp(0.0, 1.0)
-}

backend/crates/gateway-core/src/account/store.rs

@@ -3,7 +3,7 @@
 use async_trait::async_trait;
 
 use crate::error::StoreError;
-use crate::routing::ProviderKind;
+use crate::identity::ProviderKind;
 
 use super::{
     AccountStateChange, CredentialCasOutcome, CredentialCasUpdate, CredentialRevision,

backend/crates/gateway-core/src/diagnostics/capture.rs

@@ -0,0 +1,157 @@
+//! 诊断内容的统一筛选边界。未知字符串只保留长度和摘要。
+
+use serde_json::{Map, Value, json};
+use sha2::{Digest, Sha256};
+
+/// 原始字节的长度与 SHA-256，不复制或保留正文。
+#[must_use]
+pub fn body_fingerprint(bytes: &[u8]) -> Value {
+    let digest = Sha256::digest(bytes);
+    let hex: String = digest
+        .iter()
+        .flat_map(|byte| {
+            let alphabet = b"0123456789abcdef";
+            [
+                char::from(alphabet[usize::from(byte >> 4)]),
+                char::from(alphabet[usize::from(byte & 15)]),
+            ]
+        })
+        .collect();
+    json!({"bytes": bytes.len(), "sha256": hex})
+}
+
+/// 保留可诊断的协议结构；凭据永不进入普通日志或数据库。
+#[must_use]
+pub fn diagnostic_json(value: &Value) -> Value {
+    capture(value, "", 0, &mut 96)
+}
+
+fn capture(value: &Value, key: &str, depth: usize, budget: &mut usize) -> Value {
+    if *budget == 0 || depth > 6 {
+        return json!({"omitted": true});
+    }
+    *budget -= 1;
+    let key = key.to_ascii_lowercase();
+    if secret_key(&key) {
+        return Value::String("<redacted>".to_owned());
+    }
+    match value {
+        Value::Object(object) => {
+            let mut result = Map::new();
+            for (name, value) in object.iter().take(48) {
+                if *budget == 0 {
+                    break;
+                }
+                result.insert(bounded(name, 96), capture(value, name, depth + 1, budget));
+            }
+            if result.len() < object.len() {
+                result.insert(
+                    "_omittedFields".to_owned(),
+                    json!(object.len() - result.len()),
+                );
+            }
+            Value::Object(result)
+        }
+        Value::Array(items) => json!({
+            "length": items.len(),
+            "sample": items.iter().take(4)
+                .map(|item| capture(item, key.as_str(), depth + 1, budget))
+                .collect::<Vec<_>>()
+        }),
+        Value::String(text)
+            if safe_header(&key) || safe_value_key(&key) && protocol_label(text) =>
+        {
+            Value::String(bounded(text, 256))
+        }
+        Value::String(text) => body_fingerprint(text.as_bytes()),
+        other => other.clone(),
+    }
+}
+
+/// 请求/响应头保持多值；安全 trace ID 原样保存，未知值只保存摘要。
+#[must_use]
+pub fn diagnostic_headers<'a>(headers: impl IntoIterator<Item = (&'a str, &'a str)>) -> Value {
+    let mut result = Map::new();
+    for (name, value) in headers.into_iter().take(64) {
+        let name = bounded(&name.to_ascii_lowercase(), 96);
+        let value = if secret_key(&name) {
+            Value::String("<redacted>".to_owned())
+        } else if safe_header(&name) {
+            Value::String(bounded(value, 256))
+        } else {
+            body_fingerprint(value.as_bytes())
+        };
+        let values = result
+            .entry(name)
+            .or_insert_with(|| Value::Array(Vec::new()));
+        if let Value::Array(values) = values {
+            values.push(value);
+        }
+    }
+    Value::Object(result)
+}
+
+fn secret_key(key: &str) -> bool {
+    key.contains("authorization")
+        || key.contains("cookie")
+        || key.contains("api_key")
+        || key.contains("api-key")
+        || key.contains("token") && !key.ends_with("tokens")
+        || key.contains("password")
+        || key.contains("secret")
+        || key.contains("attestation")
+        || matches!(key, "x-oai-is" | "x-oai-is-update")
+}
+
+fn safe_header(key: &str) -> bool {
+    matches!(
+        key,
+        "x-oai-request-id"
+            | "x-client-request-id"
+            | "x-request-id"
+            | "request-id"
+            | "openai-request-id"
+            | "x-openai-request-id"
+            | "cf-ray"
+            | "traceparent"
+            | "tracestate"
+            | "content-type"
+            | "content-length"
+            | "content-encoding"
+            | "retry-after"
+            | "openai-processing-ms"
+            | "x-processing-ms"
+            | "date"
+            | "server"
+            | "sec-websocket-extensions"
+            | "x-codex-allowed"
+            | "x-codex-limit-reached"
+            | "x-codex-active-limit"
+            | "x-models-etag"
+    )
+}
+
+fn safe_value_key(key: &str) -> bool {
+    safe_header(key)
+        || matches!(
+            key,
+            "type" | "event" | "status" | "code" | "model" | "role" | "object" | "service_tier"
+        )
+}
+
+pub(super) fn bounded(value: &str, limit: usize) -> String {
+    value
+        .chars()
+        .take(limit)
+        .map(|c| if c.is_control() { ' ' } else { c })
+        .collect()
+}
+
+/// Event names/codes are protocol labels, never arbitrary upstream text.
+pub(super) fn protocol_label(value: &str) -> bool {
+    !value.is_empty()
+        && value.len() <= 128
+        && value
+            .bytes()
+            .all(|byte| byte.is_ascii_alphanumeric() || matches!(byte, b'.' | b'_' | b'-' | b':'))
+}

backend/crates/gateway-core/src/diagnostics/mod.rs

@@ -0,0 +1,10 @@
+//! 有界、请求局部的诊断证据；不参与路由、重试或客户端协议决策。
+
+mod capture;
+mod selection;
+mod stream;
+mod trace;
+
+pub use capture::{body_fingerprint, diagnostic_headers, diagnostic_json};
+pub use stream::{StreamCapture, StreamFormat};
+pub use trace::TraceContext;

backend/crates/gateway-core/src/diagnostics/selection.rs

@@ -0,0 +1,73 @@
+//! 复用选号时的输入，保留有界的候选评分与阻断原因。
+
+use serde_json::json;
+
+use super::TraceContext;
+use crate::account::{
+    AccountCandidate, AccountSelection, AccountSelectionContext, AccountSelector, RotationStrategy,
+    SMART_SCORE_TOLERANCE, smart_score,
+};
+
+// 单个 trace 事件最多 4 KiB；优先保留实际选中的账号。
+const MAX_CANDIDATES: usize = 6;
+
+impl TraceContext {
+    /// 记录实际选号输入与结果；只复用评分规则，不参与调度决策。
+    pub fn account_selection(
+        &self,
+        candidates: &[AccountCandidate],
+        context: &AccountSelectionContext,
+        selection: Option<&AccountSelection<'_>>,
+    ) {
+        if !self.is_enabled() {
+            return;
+        }
+        let selected = selection.as_ref().map(|s| s.candidate());
+        let selected_id = selected.map(|c| c.account.id());
+        let smart = context.policy.strategy() == RotationStrategy::Smart;
+        let observations = selected
+            .into_iter()
+            .chain(
+                candidates
+                    .iter()
+                    .filter(|c| Some(c.account.id()) != selected_id),
+            )
+            .take(MAX_CANDIDATES)
+            .map(|candidate| {
+                let signals = &candidate.signals;
+                json!({
+                    "accountId": candidate.account.id().as_str(),
+                    "weight": candidate.account.weight().get(),
+                    "blocker": AccountSelector.scheduling_blocker(candidate, context)
+                        .map(|blocker| format!("{blocker:?}")),
+                    "inFlight": signals.in_flight,
+                    "concurrencyLimit": candidate.account
+                        .effective_concurrency(context.policy.max_concurrent_per_account()).get(),
+                    "quotaRemainingBasisPoints": signals.quota_remaining_rank,
+                    "quotaResetAtUnixMs": signals.quota_reset_at.and_then(|reset|
+                        reset.duration_since(std::time::UNIX_EPOCH).ok()
+                    ).map(|duration| duration.as_millis()),
+                    "failureRateBasisPoints": signals.failure_rate_basis_points,
+                    "firstOutputLatencyMs": signals.first_output_latency_ms,
+                    "smartScore": smart.then(|| smart_score(
+                        candidate, context.policy.max_concurrent_per_account()
+                    )),
+                })
+            })
+            .collect::<Vec<_>>();
+        self.record(
+            "account.selection",
+            json!({
+                "strategy": context.policy.strategy().as_str(),
+                "selectedAccountId": selected_id.map(|id| id.as_str()),
+                "preferredAccountId": context.preferred_account.as_ref().map(|id| id.as_str()),
+                "preferredResult": selection.as_ref().map(|s| format!("{:?}", s.preferred())),
+                "roundRobinCursor": context.round_robin_cursor,
+                "smartScoreTolerance": smart.then_some(SMART_SCORE_TOLERANCE),
+                "candidateCount": candidates.len(),
+                "omittedCandidates": candidates.len().saturating_sub(observations.len()),
+                "candidates": observations,
+            }),
+        );
+    }
+}

backend/crates/gateway-core/src/diagnostics/stream.rs

@@ -0,0 +1,165 @@
+//! 仅用于观测的有界流分帧；超过限额时明确记缺口，不影响实际协议解析。
+
+use serde_json::json;
+
+use super::TraceContext;
+
+const MAX_FRAME_BYTES: usize = 128 * 1024;
+
+#[derive(Clone, Copy)]
+pub enum StreamFormat {
+    Sse,
+    JsonLines,
+}
+
+/// 同一 exchange 持有一个 observer，跨 HTTP chunk 拼接完整事件。
+pub struct StreamCapture {
+    trace: TraceContext,
+    format: StreamFormat,
+    line: Vec<u8>,
+    data: Vec<u8>,
+    event_name: Option<String>,
+    previous_cr: bool,
+    first_line: bool,
+    skipping_line: bool,
+    skipping_event: bool,
+    finished: bool,
+}
+
+impl StreamCapture {
+    #[must_use]
+    pub fn new(trace: TraceContext, format: StreamFormat) -> Self {
+        Self {
+            trace,
+            format,
+            line: Vec::new(),
+            data: Vec::new(),
+            event_name: None,
+            previous_cr: false,
+            first_line: true,
+            skipping_line: false,
+            skipping_event: false,
+            finished: false,
+        }
+    }
+
+    pub fn push(&mut self, bytes: &[u8]) {
+        self.trace.dump("upstream.chunk", bytes);
+        for byte in bytes {
+            if self.previous_cr && *byte == b'\n' {
+                self.previous_cr = false;
+                continue;
+            }
+            self.previous_cr = *byte == b'\r';
+            if matches!(*byte, b'\n' | b'\r') {
+                if !self.skipping_line {
+                    self.line();
+                }
+                self.line.clear();
+                self.skipping_line = false;
+            } else if !self.skipping_line {
+                if self.line.len() < MAX_FRAME_BYTES {
+                    self.line.push(*byte);
+                } else {
+                    self.trace.record(
+                        "capture.gap",
+                        json!({"reason": "line_size_limit", "limitBytes": MAX_FRAME_BYTES}),
+                    );
+                    self.line.clear();
+                    self.skipping_line = true;
+                    self.skipping_event = matches!(self.format, StreamFormat::Sse);
+                    self.data.clear();
+                }
+            }
+        }
+    }
+
+    pub fn finish(&mut self) {
+        if self.finished {
+            return;
+        }
+        let partial_frame = !self.line.is_empty()
+            || !self.data.is_empty()
+            || self.skipping_event
+            || self.skipping_line;
+        if !self.line.is_empty() && !self.skipping_line {
+            self.line();
+        }
+        if !self.data.is_empty() && !self.skipping_event {
+            self.trace.capture_named_event(
+                "upstream.event",
+                &self.data,
+                self.event_name.as_deref(),
+            );
+        }
+        self.trace
+            .record("upstream.eof", json!({"partialFrame": partial_frame}));
+        self.finished = true;
+    }
+
+    fn line(&mut self) {
+        let line = if self.first_line {
+            self.first_line = false;
+            self.line
+                .strip_prefix(b"\xef\xbb\xbf")
+                .unwrap_or(&self.line)
+        } else {
+            &self.line
+        };
+        if matches!(self.format, StreamFormat::JsonLines) {
+            if !line.is_empty() {
+                self.trace.capture_event("upstream.event", line);
+            }
+            return;
+        }
+        if line.is_empty() {
+            if !self.data.is_empty() && !self.skipping_event {
+                self.trace.capture_named_event(
+                    "upstream.event",
+                    &self.data,
+                    self.event_name.as_deref(),
+                );
+            }
+            self.data.clear();
+            self.event_name = None;
+            self.skipping_event = false;
+        } else if let Some(name) = line.strip_prefix(b"event:") {
+            self.event_name = Some(super::capture::bounded(
+                String::from_utf8_lossy(name).trim(),
+                128,
+            ));
+        } else if let Some(data) = line.strip_prefix(b"data:") {
+            let data = data.strip_prefix(b" ").unwrap_or(data);
+            if self.skipping_event {
+                return;
+            }
+            if self.data.len() + data.len() + 1 > MAX_FRAME_BYTES {
+                self.trace.record(
+                    "capture.gap",
+                    json!({"reason": "event_size_limit", "limitBytes": MAX_FRAME_BYTES}),
+                );
+                self.data.clear();
+                self.skipping_event = true;
+            } else {
+                if !self.data.is_empty() {
+                    self.data.push(b'\n');
+                }
+                self.data.extend_from_slice(data);
+            }
+        }
+    }
+}
+
+impl Drop for StreamCapture {
+    fn drop(&mut self) {
+        if !self.finished {
+            self.trace.record(
+                "upstream.reader.dropped",
+                json!({
+                    "partialBytes": self.line.len() + self.data.len(),
+                    "captureIncomplete": self.skipping_event || self.skipping_line,
+                }),
+            );
+        }
+    }
+}

backend/crates/gateway-core/src/diagnostics/trace.rs

@@ -0,0 +1,345 @@
+//! 首部与最近事件同时保留，流式 delta 合并，所有淘汰均有计数。
+
+use std::{
+    collections::VecDeque,
+    sync::{Arc, Mutex},
+    time::{Instant, SystemTime, UNIX_EPOCH},
+};
+
+use base64::{Engine as _, engine::general_purpose::STANDARD};
+use serde::Serialize;
+use serde_json::{Value, json};
+
+use super::capture::bounded;
+use super::{body_fingerprint, diagnostic_headers, diagnostic_json};
+
+const MAX_EVENTS: usize = 128;
+const HEAD_EVENTS: usize = 8;
+const MAX_DATA_BYTES: usize = 4096;
+const MAX_BUFFER_BYTES: usize = 64 * 1024;
+
+/// 显式传给异步任务的关联上下文；默认值禁用捕获，避免全局请求映射。
+#[derive(Clone, Default)]
+pub struct TraceContext {
+    state: Option<Arc<Mutex<TraceState>>>,
+    attempt_index: u32,
+    exchange_id: Option<u64>,
+}
+
+impl std::fmt::Debug for TraceContext {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("TraceContext")
+            .field("attempt_index", &self.attempt_index)
+            .field("exchange_id", &self.exchange_id)
+            .finish_non_exhaustive()
+    }
+}
+
+struct TraceState {
+    request_id: String,
+    started_at_ms: u128,
+    started: Instant,
+    sequence: u64,
+    exchanges: u64,
+    wire_frames: u64,
+    wire_bytes: u64,
+    dropped_events: u64,
+    bytes: usize,
+    events: VecDeque<TraceEvent>,
+}
+
+#[derive(Serialize)]
+#[serde(rename_all = "camelCase")]
+struct TraceEvent {
+    sequence: u64,
+    last_sequence: u64,
+    elapsed_ms: u64,
+    last_elapsed_ms: u64,
+    attempt_index: u32,
+    exchange_id: Option<u64>,
+    stage: &'static str,
+    count: u64,
+    data: Value,
+    #[serde(skip)]
+    bytes: usize,
+}
+
+impl TraceContext {
+    /// 是否已启用请求诊断，供调用方避免构造不会保存的事实。
+    #[must_use]
+    pub const fn is_enabled(&self) -> bool {
+        self.state.is_some()
+    }
+
+    /// 一个模型请求只创建一次，所有 attempt 共享同一有界时间线。
+    #[must_use]
+    pub fn new(request_id: &str) -> Self {
+        Self {
+            state: Some(Arc::new(Mutex::new(TraceState {
+                request_id: bounded(request_id, 128),
+                started_at_ms: SystemTime::now()
+                    .duration_since(UNIX_EPOCH)
+                    .unwrap_or_default()
+                    .as_millis(),
+                started: Instant::now(),
+                sequence: 0,
+                exchanges: 0,
+                wire_frames: 0,
+                wire_bytes: 0,
+                dropped_events: 0,
+                bytes: 0,
+                events: VecDeque::new(),
+            }))),
+            ..Self::default()
+        }
+    }
+
+    #[must_use]
+    pub fn attempt(&self, attempt_index: u32) -> Self {
+        Self {
+            state: self.state.clone(),
+            attempt_index,
+            exchange_id: None,
+        }
+    }
+
+    /// 一个 attempt 中的每次实际 transport exchange 也有独立编号。
+    #[must_use]
+    pub fn exchange(&self, transport: &'static str) -> Self {
+        let mut context = self.clone();
+        if let Some(state) = &self.state {
+            let mut state = state
+                .lock()
+                .unwrap_or_else(std::sync::PoisonError::into_inner);
+            state.exchanges += 1;
+            context.exchange_id = Some(state.exchanges);
+        }
+        context.record("upstream.exchange.started", json!({"transport": transport}));
+        context
+    }
+
+    /// details 只允许调用方构造的诊断事实；不接收原始请求/响应正文。
+    pub fn record(&self, stage: &'static str, data: Value) {
+        self.push(stage, data, false);
+    }
+
+    /// 同一个头部边界只采集一次：默认脱敏，显式开启 dump 时另存完整字节。
+    /// facts 必须为调用方构造的安全对象；原始头值只进入独立 dump。
+    pub fn headers<'a>(
+        &self,
+        stage: &'static str,
+        mut facts: Value,
+        headers: impl IntoIterator<Item = (&'a str, &'a [u8])>,
+    ) {
+        if self.state.is_none() {
+            return;
+        }
+        let Some(facts_object) = facts.as_object_mut() else {
+            return;
+        };
+        let headers: Vec<_> = headers.into_iter().collect();
+        let summary = diagnostic_headers(
+            headers
+                .iter()
+                .map(|(name, value)| (*name, std::str::from_utf8(value).unwrap_or("<binary>"))),
+        );
+        facts_object.insert("headers".to_owned(), summary);
+        self.record(stage, facts);
+        if tracing::enabled!(target: "request_dump", tracing::Level::INFO) {
+            let values: Vec<_> = headers
+                .iter()
+                .map(|(name, value)| json!({"name": name, "valueBase64": STANDARD.encode(value)}))
+                .collect();
+            if let Ok(bytes) = serde_json::to_vec(&json!({"headers": values})) {
+                self.dump(stage, &bytes);
+            }
+        }
+    }
+
+    /// 入站 JSON 先记录再解析业务语义，包括未知事件和 metadata。
+    /// 原文仅在现有 request_dump 开关打开时写入其独立文件。
+    pub fn capture(&self, stage: &'static str, bytes: &[u8]) {
+        self.dump(stage, bytes);
+        self.capture_event(stage, bytes);
+    }
+
+    /// StreamCapture 已转储原始 chunk 时，只提取完整事件的安全摘要。
+    pub fn capture_event(&self, stage: &'static str, bytes: &[u8]) {
+        self.capture_named_event(stage, bytes, None);
+    }
+
+    pub fn capture_named_event(&self, stage: &'static str, bytes: &[u8], name: Option<&str>) {
+        if self.state.is_none() {
+            return;
+        }
+        let fingerprint = body_fingerprint(bytes);
+        if bytes.len() > 128 * 1024 {
+            self.record("capture.gap", json!({"reason": "json_inspection_size_limit", "stage": stage, "body": fingerprint}));
+            return;
+        }
+        let parsed = serde_json::from_slice::<Value>(bytes).ok();
+        let event_type = parsed
+            .as_ref()
+            .and_then(|v| v.get("type"))
+            .and_then(Value::as_str)
+            .or(name)
+            .filter(|kind| super::capture::protocol_label(kind));
+        let delta = event_type.is_some_and(|kind| kind.ends_with(".delta"));
+        let data = json!({
+            "body": fingerprint,
+            "eventType": event_type.map(|kind| bounded(kind, 128)),
+            "jsonValid": parsed.is_some(),
+            "metadata": parsed.as_ref().filter(|_| !delta).map(diagnostic_json),
+        });
+        self.push(stage, data, delta);
+    }
+
+    /// 只记录业务解析边界；metadata 已由 transport 在解析前捕获。
+    pub fn wire_event(&self, protocol: &str, event_type: Option<&str>) {
+        let event_type = event_type.filter(|kind| super::capture::protocol_label(kind));
+        let delta = event_type.is_some_and(|kind| kind.ends_with(".delta"));
+        self.push(
+            "provider.event",
+            json!({
+                "protocol": protocol,
+                "eventType": event_type.map(|kind| bounded(kind, 128)),
+            }),
+            delta,
+        );
+    }
+
+    /// 完整报文捕获与摘要使用相同 request / attempt / exchange ID。
+    pub fn dump(&self, stage: &'static str, bytes: &[u8]) {
+        if !tracing::enabled!(target: "request_dump", tracing::Level::INFO) {
+            return;
+        }
+        if let Some(state) = &self.state {
+            let mut state = state
+                .lock()
+                .unwrap_or_else(std::sync::PoisonError::into_inner);
+            state.wire_frames += 1;
+            state.wire_bytes = state.wire_bytes.saturating_add(bytes.len() as u64);
+            let wire_sequence = state.wire_frames;
+            let chunk_count = bytes.len().div_ceil(32 * 1024).max(1);
+            // Each log entry stays bounded even for images or very large WebSocket frames.
+            for chunk_index in 0..chunk_count {
+                let start = chunk_index * 32 * 1024;
+                let chunk = &bytes[start..bytes.len().min(start + 32 * 1024)];
+                tracing::info!(target: "request_dump", request_id = %state.request_id,
+                    attempt_index = self.attempt_index, exchange_id = self.exchange_id,
+                    stage, wire_sequence, chunk_index, chunk_count,
+                    body_bytes = bytes.len(), body_base64 = %STANDARD.encode(chunk),
+                    contains_sensitive_data = true, "diagnostic wire capture");
+            }
+        }
+    }
+
+    /// 与请求终态原子持久化；旧记录没有此字段，不伪造历史时间线。
+    #[must_use]
+    pub fn snapshot(&self) -> Option<Value> {
+        let state = self
+            .state
+            .as_ref()?
+            .lock()
+            .unwrap_or_else(std::sync::PoisonError::into_inner);
+        Some(json!({
+            "schemaVersion": 1, "requestId": state.request_id,
+            "startedAtUnixMs": state.started_at_ms, "totalEvents": state.sequence,
+            "droppedEvents": state.dropped_events, "maxEvents": MAX_EVENTS,
+            "captureMode": "sanitized", "events": state.events,
+            "wireDumpEnabled": tracing::enabled!(target: "request_dump", tracing::Level::INFO),
+            "wireFrames": state.wire_frames, "wireBytes": state.wire_bytes,
+            "maxBufferBytes": MAX_BUFFER_BYTES, "headEvents": HEAD_EVENTS,
+            "snapshotBoundary": "execution_finalization",
+        }))
+    }
+
+    fn push(&self, stage: &'static str, mut data: Value, coalesce: bool) {
+        let Some(state) = &self.state else { return };
+        let mut encoded = serde_json::to_vec(&data).unwrap_or_default();
+        if encoded.len() > MAX_DATA_BYTES {
+            data = json!({"truncated": true, "summary": body_fingerprint(&encoded),
+                "eventType": data.get("eventType"), "body": data.get("body"),
+                "jsonValid": data.get("jsonValid"),
+            });
+            encoded = serde_json::to_vec(&data).unwrap_or_default();
+        }
+        let mut state = state
+            .lock()
+            .unwrap_or_else(std::sync::PoisonError::into_inner);
+        state.sequence += 1;
+        let sequence = state.sequence;
+        let elapsed_ms = u64::try_from(state.started.elapsed().as_millis()).unwrap_or(u64::MAX);
+        if coalesce
+            && let Some(last) = state.events.iter_mut().rev().find(|event| {
+                event.stage == stage
+                    && event.attempt_index == self.attempt_index
+                    && event.exchange_id == self.exchange_id
+            })
+            && last.stage == stage
+            && last.attempt_index == self.attempt_index
+            && last.exchange_id == self.exchange_id
+            && last.data.get("eventType") == data.get("eventType")
+        {
+            last.count += 1;
+            last.last_sequence = sequence;
+            last.last_elapsed_ms = elapsed_ms;
+            return;
+        }
+        // 普通日志只输出有界安全事实；进程意外退出时仍可按 ID 检索已发生阶段。
+        tracing::info!(target: "request_trace", request_id = %state.request_id,
+            attempt_index = self.attempt_index, exchange_id = self.exchange_id,
+            sequence, elapsed_ms, stage, data = %data, "request trace");
+        let bytes = encoded.len() + 256;
+        state.bytes += bytes;
+        state.events.push_back(TraceEvent {
+            sequence,
+            last_sequence: sequence,
+            elapsed_ms,
+            last_elapsed_ms: elapsed_ms,
+            attempt_index: self.attempt_index,
+            exchange_id: self.exchange_id,
+            stage,
+            count: 1,
+            data,
+            bytes,
+        });
+        while state.events.len() > MAX_EVENTS || state.bytes > MAX_BUFFER_BYTES {
+            // Preserve failures and retry decisions ahead of routine middle-of-stream events.
+            // Head/tail and important stages compete under the same hard memory limit.
+            let index = (HEAD_EVENTS..state.events.len().saturating_sub(8))
+                .find(|index| {
+                    !matches!(
+                        state.events[*index].stage,
+                        "attempt.started"
+                            | "account.selection"
+                            | "account.selected"
+                            | "attempt.failed"
+                            | "retry.decided"
+                            | "upstream.close"
+                            | "upstream.read.failed"
+                            | "capture.gap"
+                            | "request.finished"
+                    )
+                })
+                .unwrap_or(if state.events.len() > HEAD_EVENTS {
+                    HEAD_EVENTS
+                } else {
+                    0
+                });
+            if let Some(event) = state.events.remove(index) {
+                state.bytes = state.bytes.saturating_sub(event.bytes);
+                state.dropped_events += event.count;
+            }
+        }
+    }
+}
+
+impl Drop for TraceState {
+    fn drop(&mut self) {
+        tracing::info!(target: "request_trace", request_id = %self.request_id,
+            stage = "request.trace.closed", total_events = self.sequence,
+            dropped_events = self.dropped_events, wire_frames = self.wire_frames,
+            wire_bytes = self.wire_bytes, "request diagnostic capture closed");
+    }
+}

backend/crates/gateway-core/src/engine/budget.rs

@@ -0,0 +1,52 @@
+//! 按 Key 持久化 USD 限额与已取得费用，不依赖尽力写入的请求观测。
+
+use std::time::SystemTime;
+
+use futures::future::BoxFuture;
+
+use crate::{error::GatewayError, metering::Decimal, policy::ClientApiKeyId};
+
+use super::ModelRequestId;
+
+#[derive(Debug, Clone, Copy, Default, PartialEq, Eq)]
+pub struct ClientBudgetLimits {
+    pub daily_usd: Decimal,
+    pub weekly_usd: Decimal,
+}
+
+impl ClientBudgetLimits {
+    #[must_use]
+    pub fn is_limited(self) -> bool {
+        self.daily_usd != Decimal::ZERO || self.weekly_usd != Decimal::ZERO
+    }
+}
+
+#[derive(Debug, Clone, Default, PartialEq, Eq)]
+pub struct ClientBudgetStatus {
+    pub limits: ClientBudgetLimits,
+    pub daily_used_usd: Decimal,
+    pub weekly_used_usd: Decimal,
+    pub daily_resets_at: Option<SystemTime>,
+    pub weekly_resets_at: Option<SystemTime>,
+}
+
+#[derive(Debug, Clone)]
+pub struct ClientBudgetCharge {
+    pub key_id: ClientApiKeyId,
+    pub request_id: ModelRequestId,
+    /// 已取得的 USD 费用，包含重试；缺少费用的尝试按零累计。
+    pub amount_usd: Decimal,
+    pub completed_at: SystemTime,
+}
+
+#[derive(Debug, Clone, Copy, thiserror::Error)]
+#[error("client budget store is unavailable")]
+pub struct ClientBudgetError;
+
+pub trait ClientBudgetPort: Send + Sync {
+    /// 原子检查当前限额与已用金额，不创建预扣费或待结算记录。
+    fn admit(&self, key_id: ClientApiKeyId) -> BoxFuture<'_, Result<(), GatewayError>>;
+
+    /// 按网关请求 ID 幂等累计已取得费用；写入失败由 Store 重试。
+    fn settle(&self, charge: ClientBudgetCharge) -> BoxFuture<'_, Result<(), ClientBudgetError>>;
+}

backend/crates/gateway-core/src/engine/continuation.rs

@@ -8,9 +8,9 @@ use std::fmt;
 use futures::future::BoxFuture;
 
 use crate::account::ProviderAccountId;
+use crate::identity::ProviderKind;
 use crate::operation::ProviderSessionState;
 use crate::policy::ClientApiKeyId;
-use crate::routing::ProviderKind;
 
 /// 客户端或 Provider 传递的 opaque response handle。
 ///

backend/crates/gateway-core/src/engine/coordinator.rs

@@ -1,21 +1,26 @@
 //! 唯一的账号重试、发送与下游 commit barrier owner。
 
+use crate::diagnostics::TraceContext;
+use serde_json::json;
+
 use std::collections::BTreeSet;
 use std::future::Future;
 use std::num::NonZeroU32;
 use std::sync::Arc;
 use std::time::{Duration, Instant, SystemTime};
 
+use super::observation::ResponseObservation;
 use crate::engine::continuation::{
     ContinuationBinding, NativeContinuationPin, NativeContinuationScope, PreviousResponseId,
 };
+
 use crate::engine::provider::{Provider, ProviderCallMetadata, ProviderRequest, ProviderStream};
 use crate::engine::{
     AccountAttemptContext, AttemptContext, AttemptRecord, AttemptTransport, AttemptTrigger,
     CommitRequirement, ContinuationAttempt, CoordinatedEvent, EngineError, ExecutionOutcome,
     ExecutionStore, GatewayEngine, IntermediateFailure, ModelRequestFailureObservation,
-    ModelRequestFinalization, ModelRequestId, ModelRequestTimings, NewModelRequest,
-    ProviderAccountStateOwner, ProviderAttemptOutcome, RequestAttemptContext, UpstreamSendState,
+    ModelRequestFinalization, ModelRequestId, NewModelRequest, ProviderAccountStateOwner,
+    ProviderAttemptOutcome, RequestAttemptContext, UpstreamSendState,
 };
 use crate::error::{
     ContinuationRecoveryDisposition, GatewayError, GatewayErrorKind, ProviderError,
@@ -25,7 +30,7 @@ use crate::event::{
     GatewayEvent, ProviderEvent, ProviderResponseHeader, ProviderResponseObservation,
 };
 use crate::lifecycle::CancellationToken;
-use crate::metering::{CostEstimate, CostSource, Usage};
+use crate::metering::Decimal;
 use crate::operation::{Operation, ProviderSessionState};
 use crate::routing::RoutingPlan;
 use futures::future::Fuse;
@@ -143,12 +148,28 @@ where
                     .position(|candidate| candidate.provider() == pin.provider())
                     .ok_or(EngineError::ContinuationPinMismatch)
             })?;
+        let trace = TraceContext::new(request_id.as_str());
+        trace.record(
+            "request.routed",
+            json!({
+                "endpoint": request.endpoint, "protocol": request.protocol,
+                "clientTransport": request.client_transport,
+                "model": request.requested_model.as_ref().map(|model| model.as_str()),
+                "configRevision": format!("{:?}", request.config_revision),
+                "admissionMs": request.admission_decision_ms,
+                "continuation": format!("{continuation_attempt:?}"),
+                "candidateCount": plan.candidates().len(),
+            }),
+        );
         let image_generation_requested = operation.image_generation_requested();
         let mut session = ResponseExecutionSession {
             engine: Arc::clone(&self.engine),
             request_id,
             client_api_key_ref,
-            timing_started_at,
+            observation: ResponseObservation::new(timing_started_at),
+            budget_prior_attempts_usd: Decimal::ZERO,
+            budget_attempt_already_counted: false,
+            trace,
             deadline,
             deadline_timer: Delay::new(
                 deadline
@@ -179,12 +200,8 @@ where
             delivery_pending: false,
             upstream_complete: false,
             finalized: false,
-            usage: Usage::new(),
+            finalized_at: None,
             image_generation_requested,
-            cost: CostEstimate::unavailable(),
-            timings: ModelRequestTimings::default(),
-            client_response_id: None,
-            upstream_response_id: None,
             last_retryable_failure: None,
             last_retryable_failure_events: Vec::new(),
             provider_attempt_outcomes: Vec::new(),
@@ -239,7 +256,10 @@ pub struct ResponseExecutionSession<S: ?Sized> {
     engine: Arc<GatewayEngine<S>>,
     request_id: ModelRequestId,
     client_api_key_ref: crate::policy::ClientApiKeyId,
-    timing_started_at: Instant,
+    observation: ResponseObservation,
+    budget_prior_attempts_usd: Decimal,
+    budget_attempt_already_counted: bool,
+    trace: TraceContext,
     deadline: SystemTime,
     /// 会话级 deadline 计时器；deadline 固定，帧循环内复用而非逐事件新建。
     deadline_timer: Fuse<Delay>,
@@ -274,12 +294,8 @@ pub struct ResponseExecutionSession<S: ?Sized> {
     delivery_pending: bool,
     upstream_complete: bool,
     finalized: bool,
-    usage: Usage,
+    finalized_at: Option<SystemTime>,
     image_generation_requested: bool,
-    cost: CostEstimate,
-    timings: ModelRequestTimings,
-    client_response_id: Option<String>,
-    upstream_response_id: Option<String>,
     /// 最近一次为无感恢复而被丢弃的原始上游错误；只在后续空选路时成为终态。
     last_retryable_failure: Option<ProviderError>,
     /// 与 `last_retryable_failure` 同属一个 attempt 的原始失败批次。
@@ -298,6 +314,11 @@ impl<S: ?Sized> ResponseExecutionSession<S>
 where
     S: ExecutionStore,
 {
+    /// 当前请求共享的诊断上下文。
+    pub fn trace(&self) -> TraceContext {
+        self.trace.clone()
+    }
+
     /// 读取下一条 canonical event；首条未提交事件会携带 commit 要求。
     ///
     /// # Errors
@@ -405,6 +426,10 @@ where
             return Err(EngineError::InvalidDeliveryState);
         }
         let committed_at = SystemTime::now();
+        self.trace.record(
+            "downstream.committed",
+            json!({"status": client_status_code}),
+        );
         if self.request_persisted {
             best_effort_store_write(
                 "mark_downstream_committed",
@@ -457,6 +482,35 @@ where
         self.finalized
     }
 
+    #[must_use]
+    pub fn budget_charge(&self) -> super::budget::ClientBudgetCharge {
+        // 超出数据库可表示范围时保留最大金额，避免溢出后误记为零。
+        let amount_usd = self
+            .budget_prior_attempts_usd
+            .checked_add(self.budget_attempt_usd())
+            .unwrap_or(Decimal::MAX);
+        super::budget::ClientBudgetCharge {
+            key_id: self.client_api_key_ref.clone(),
+            request_id: self.request_id.clone(),
+            amount_usd,
+            completed_at: self.finalized_at.unwrap_or_else(SystemTime::now),
+        }
+    }
+
+    fn budget_attempt_usd(&self) -> Decimal {
+        if self.budget_attempt_already_counted {
+            return Decimal::ZERO;
+        }
+        // Key 只累计已取得的 USD 费用；缺少费用的请求按零结算。
+        // 发送状态仍用于判断重放是否安全并保留在诊断中，不能据此推断存在欠费。
+        self.observation
+            .cost
+            .total()
+            .filter(|money| money.currency().as_str() == "USD")
+            .map(crate::metering::Money::amount)
+            .unwrap_or(Decimal::ZERO)
+    }
+
     /// 返回截至当前已完成的实际上游调用结果。
     ///
     /// 调用方可保存已消费下标；该切片在会话生命周期内只追加、不改写。
@@ -498,7 +552,7 @@ where
             return None;
         }
         let account = current.metadata.provider_account_id().clone();
-        let response_id = self.upstream_response_id.as_deref()?;
+        let response_id = self.observation.upstream_response_id.as_deref()?;
         let previous_response_id = PreviousResponseId::new(response_id.to_owned());
         let upstream_response_id = PreviousResponseId::new(response_id.to_owned());
         Some(
@@ -570,11 +624,19 @@ where
                     return Err(EngineError::Deadline);
                 }
                 PollBoundary::Item(Some(Ok(mut event))) => {
+                    if let Some(wire) = event.wire_event() {
+                        self.trace
+                            .attempt(self.attempts)
+                            .wire_event(wire.protocol(), wire.event_type());
+                    }
+                    if let Some(state) = event.session_update() {
+                        self.observe_session_update(state);
+                    }
                     if let Some(observation) = event.take_observation() {
                         self.observe_response(observation);
                     }
                     for fact in event.canonical_facts() {
-                        self.observe_response_identity(fact);
+                        self.observation.observe_identity(fact);
                     }
                     for fact in event.canonical_facts() {
                         self.observe_event(fact).await;
@@ -686,7 +748,8 @@ where
         }));
         let context = AttemptContext::new(
             RequestAttemptContext::new(self.request_id.clone(), self.client_api_key_ref.clone())
-                .with_timing_started_at(self.timing_started_at),
+                .with_timing_started_at(self.observation.timing_started_at)
+                .with_trace(self.trace.clone()),
             next_attempt,
             self.deadline,
             self.plan.account_selection_policy(),
@@ -709,6 +772,18 @@ where
             .ok_or_else(|| EngineError::ProviderNotRegistered {
                 provider: candidate.provider().as_str().to_owned(),
             })?;
+        let attempt_trace = self.trace.attempt(next_attempt.get());
+        attempt_trace.record(
+            "attempt.started",
+            json!({
+                "provider": candidate.provider().as_str(),
+                "model": candidate.upstream_model().map(|model| model.as_str()),
+                "transportPolicy": format!("{attempt_transport:?}"),
+                "continuation": format!("{:?}", self.continuation_attempt),
+                "pinnedAccount": pinned_account.as_ref().map(|id| id.as_str()),
+                "transportRecovery": is_transport_recovery,
+            }),
+        );
         let provider_request = ProviderRequest::new(self.operation.clone(), candidate.clone());
         let stream = match poll_provider(
             provider,
@@ -733,6 +808,7 @@ where
             ProviderBoundary::Result(result) => match *result {
                 Ok(stream) => stream,
                 Err(error) => {
+                    record_trace_error(&attempt_trace, &error);
                     if self.prepare_unavailable_native_continuation_replay(&error) {
                         return Ok(Some(PullOutcome::AttemptDiscarded));
                     }
@@ -760,6 +836,7 @@ where
                         let mut events = std::mem::take(&mut self.last_retryable_failure_events);
                         if !events.is_empty() {
                             self.observe_atomic_terminal_events(&mut events);
+                            self.budget_attempt_already_counted = true;
                             return Ok(Some(PullOutcome::TerminalFailure {
                                 events,
                                 error: last_failure,
@@ -804,6 +881,11 @@ where
         }
 
         let metadata = stream.metadata().clone();
+        attempt_trace.record("account.selected", json!({
+            "provider": metadata.provider().as_str(), "accountId": metadata.provider_account_id().as_str(),
+            "transport": metadata.transport().as_str(),
+            "selectionMs": metadata.selection_observation().map(|o| o.account_selection_wait_ms()),
+        }));
         let selection_observation = metadata.selection_observation();
         let capacity = selection_observation.and_then(|observation| observation.capacity());
         if !self.account_selection.is_diagnostic()
@@ -948,30 +1030,24 @@ where
     }
 
     async fn observe_event(&mut self, event: &GatewayEvent) {
-        self.observe_event_facts(event);
+        self.observation.observe_event(event);
         self.mark_send_observed().await;
     }
 
-    fn observe_event_facts(&mut self, event: &GatewayEvent) {
-        let elapsed = elapsed_ms(self.timing_started_at);
-        observe_event_timing(&mut self.timings, event, elapsed);
-        if let GatewayEvent::Usage(observed) = event {
-            self.usage.merge(observed);
-        }
-        if let GatewayEvent::CalculatedCost(observed) = event
-            && self.cost.source() != CostSource::ProviderReported
-        {
-            self.cost = observed.into_estimate();
-        }
-        if let GatewayEvent::ProviderCost(observed) = event {
-            self.cost = observed.into_estimate();
-        }
-    }
-
     async fn observe_wire_event(&mut self) {
         self.mark_send_observed().await;
     }
 
+    fn observe_session_update(&mut self, state: &ProviderSessionState) {
+        let Some(current) = self.current.as_mut() else {
+            return;
+        };
+        if state.provider() != current.metadata.provider().as_str() {
+            return;
+        }
+        self.operation.set_provider_session_state(state.clone());
+    }
+
     async fn mark_send_observed(&mut self) {
         let Some(current) = self.current.as_mut() else {
             return;
@@ -1003,44 +1079,10 @@ where
         {
             return;
         }
-        let observed = observation.timings();
-        if let Some(value) = observed.transport_decision_wait_ms {
-            self.timings.transport_decision_wait_ms = Some(value);
-        }
-        if let Some(value) = observed.connect_ms {
-            self.timings.connect_ms = Some(value);
-        }
-        if let Some(value) = observed.headers_ms {
-            self.timings.headers_ms = Some(value);
-        }
-        if let Some(value) = observed.first_event_ms {
-            self.timings.first_event_ms = Some(value);
-        }
-        if let Some(value) = observed.first_reasoning_ms {
-            self.timings.first_reasoning_ms = Some(value);
-        }
-        if let Some(value) = observed.first_text_ms {
-            self.timings.first_text_ms = Some(value);
-        }
-        if let Some(value) = observed.first_token_ms {
-            self.timings.first_token_ms = Some(value);
-        }
-        if let Some(value) = observed.provider_processing_ms {
-            self.timings.provider_processing_ms = Some(value);
-        }
+        self.observation.observe_response(&observation);
         current.response_observation = Some(observation);
     }
 
-    fn observe_response_identity(&mut self, event: &GatewayEvent) {
-        let metadata = match event {
-            GatewayEvent::Started(metadata) | GatewayEvent::Completed(metadata) => metadata,
-            _ => return,
-        };
-        let response_id = metadata.response_id().to_owned();
-        self.client_response_id = Some(response_id.clone());
-        self.upstream_response_id = Some(response_id);
-    }
-
     /// 失败可重试时要求丢弃本 attempt；预算耗尽时可返回最后一批原始失败事件。
     async fn handle_stream_error(
         &mut self,
@@ -1048,6 +1090,7 @@ where
     ) -> Result<StreamErrorOutcome, EngineError> {
         // 原始 wire 只活在 request-local 决策状态；clone、attempt 记录与持久化终态
         // 均只接触已剥离的稳定错误字段。
+        record_trace_error(&self.trace.attempt(self.attempts), &error);
         let mut atomic_client_events = error.take_atomic_client_events();
         let current = self.current.take().ok_or(EngineError::NoActiveAttempt)?;
         self.record_provider_failure(current.metadata.provider().clone(), error.kind());
@@ -1128,7 +1171,20 @@ where
             || account_rotation_retry
             || transport_recovery.is_some();
 
+        self.trace.attempt(current.index.get()).record("retry.decided", json!({
+            "retryable": retryable, "continuationRetry": continuation_retry,
+            "sameAccountRetry": same_account_retry, "accountRotationRetry": account_rotation_retry,
+            "ordinaryRetry": ordinary_retry, "transportRecovery": transport_recovery.is_some(),
+            "delayMs": transport_recovery.map(|(_, delay)| duration_ms(delay)),
+            "downstreamCommitted": self.downstream_committed_at.is_some(),
+            "sendState": format!("{attempt_send_state:?}"),
+        }));
         if retryable {
+            for event in &atomic_client_events {
+                for fact in event.canonical_facts() {
+                    self.observation.observe_event(fact);
+                }
+            }
             // 普通 clone 只保留稳定事实；原始 wire/HTTP response 由 request-local
             // 所有权保留到下一次 attempt 成功，或最终空选路时返回客户端。
             let persistence_error = self.request_persisted.then(|| error.clone());
@@ -1203,8 +1259,8 @@ where
                 self.observe_response(observation);
             }
             for fact in event.canonical_facts() {
-                self.observe_response_identity(fact);
-                self.observe_event_facts(fact);
+                self.observation.observe_identity(fact);
+                self.observation.observe_event(fact);
             }
         }
     }
@@ -1303,18 +1359,13 @@ where
     }
 
     fn reset_uncommitted_observations(&mut self) {
-        self.usage = Usage::new();
-        self.cost = CostEstimate::unavailable();
-        self.client_response_id = None;
-        self.upstream_response_id = None;
-        self.timings.transport_decision_wait_ms = None;
-        self.timings.connect_ms = None;
-        self.timings.headers_ms = None;
-        self.timings.first_event_ms = None;
-        self.timings.first_reasoning_ms = None;
-        self.timings.first_text_ms = None;
-        self.timings.first_token_ms = None;
-        self.timings.provider_processing_ms = None;
+        // 响应观测按尝试隔离；被丢弃尝试中已取得的费用仍计入 Key。
+        self.budget_prior_attempts_usd = self
+            .budget_prior_attempts_usd
+            .checked_add(self.budget_attempt_usd())
+            .unwrap_or(Decimal::MAX);
+        self.budget_attempt_already_counted = false;
+        self.observation.reset_for_attempt();
         self.upstream_complete = false;
     }
 
@@ -1323,7 +1374,8 @@ where
             return Ok(());
         }
         let completed_at = SystemTime::now();
-        self.timings.latency_ms = Some(elapsed_ms(self.timing_started_at));
+        self.finalized_at = Some(completed_at);
+        self.observation.finish();
         let upstream_request_id = self.current.as_ref().and_then(|current| {
             current
                 .response_observation
@@ -1349,6 +1401,10 @@ where
             self.current_transport_observation();
         let service_tier = self.current_service_tier();
         let provider_metadata_json = self.current_provider_metadata_json();
+        self.trace.record(
+            "request.finished",
+            json!({"outcome": "succeeded", "attempts": self.attempts}),
+        );
         if self.request_persisted {
             best_effort_store_write(
                 "finalize_model_request",
@@ -1363,23 +1419,24 @@ where
                         downstream_committed_at: self.downstream_committed_at,
                         client_status_code: self.client_status_code,
                         upstream_status_code,
-                        client_response_id: self.client_response_id.clone(),
+                        client_response_id: self.observation.client_response_id.clone(),
                         upstream_request_id,
-                        upstream_response_id: self.upstream_response_id.clone(),
+                        upstream_response_id: self.observation.upstream_response_id.clone(),
                         upstream_transport,
                         http_version,
                         websocket_pool,
                         service_tier,
                         provider_metadata_json,
+                        diagnostic_trace_json: self.trace.snapshot().map(|value| value.to_string()),
                         error: None,
                         provider_error_code: None,
                         raw_upstream_error: None,
                         failure_observation: ModelRequestFailureObservation::default(),
                         retry_after_ms: None,
-                        usage: self.usage.clone(),
+                        usage: self.observation.usage.clone(),
                         image_generation_succeeded: self.image_generation_succeeded(),
-                        cost: self.cost.clone(),
-                        timings: self.timings.clone(),
+                        cost: self.observation.cost.clone(),
+                        timings: self.observation.timings.clone(),
                         completed_at,
                     }),
             )
@@ -1489,12 +1546,21 @@ where
         if self.finalized {
             return Ok(());
         }
+        self.trace.record(
+            "request.finished",
+            json!({
+                "outcome": format!("{:?}", finalization.outcome),
+                "errorKind": finalization.error.kind().as_str(),
+                "sendState": format!("{:?}", finalization.send_state), "attempts": self.attempts,
+            }),
+        );
+        let completed_at = SystemTime::now();
+        self.finalized_at = Some(completed_at);
         if !self.request_persisted {
             self.finalized = true;
             return Ok(());
         }
-        let completed_at = SystemTime::now();
-        self.timings.latency_ms = Some(elapsed_ms(self.timing_started_at));
+        self.observation.finish();
         let upstream_request_id = self.current.as_ref().and_then(|current| {
             current
                 .response_observation
@@ -1535,23 +1601,24 @@ where
                     upstream_status_code: finalization
                         .upstream_status_code
                         .or(observed_status_code),
-                    client_response_id: self.client_response_id.clone(),
+                    client_response_id: self.observation.client_response_id.clone(),
                     upstream_request_id,
-                    upstream_response_id: self.upstream_response_id.clone(),
+                    upstream_response_id: self.observation.upstream_response_id.clone(),
                     upstream_transport,
                     http_version,
                     websocket_pool,
                     service_tier,
                     provider_metadata_json,
+                    diagnostic_trace_json: self.trace.snapshot().map(|value| value.to_string()),
                     error: Some(finalization.error),
                     provider_error_code: finalization.provider_error_code,
                     raw_upstream_error: finalization.raw_upstream_error,
                     failure_observation: finalization.observation,
                     retry_after_ms: finalization.retry_after_ms,
-                    usage: self.usage.clone(),
+                    usage: self.observation.usage.clone(),
                     image_generation_succeeded: self.image_generation_succeeded(),
-                    cost: self.cost.clone(),
-                    timings: self.timings.clone(),
+                    cost: self.observation.cost.clone(),
+                    timings: self.observation.timings.clone(),
                     completed_at,
                 }),
         )
@@ -1599,7 +1666,11 @@ where
             if matches!(self.operation, Operation::GenerateImage(_)) {
                 self.upstream_complete
             } else {
-                self.usage.image_output_tokens.unwrap_or_default() > 0
+                self.observation
+                    .usage
+                    .image_output_tokens
+                    .unwrap_or_default()
+                    > 0
             }
         })
     }
@@ -1637,7 +1708,7 @@ where
 
     fn record_provider_failure(
         &mut self,
-        provider_kind: crate::routing::ProviderKind,
+        provider_kind: crate::identity::ProviderKind,
         error_kind: ProviderErrorKind,
     ) {
         self.provider_attempt_outcomes
@@ -1826,31 +1897,21 @@ const fn escalate_send_state(a: UpstreamSendState, b: UpstreamSendState) -> Upst
     }
 }
 
-fn observe_event_timing(timings: &mut ModelRequestTimings, event: &GatewayEvent, elapsed_ms: u64) {
-    timings.first_event_ms.get_or_insert(elapsed_ms);
-    match event {
-        GatewayEvent::ReasoningDelta(_) => {
-            timings.first_reasoning_ms.get_or_insert(elapsed_ms);
-            timings.first_token_ms.get_or_insert(elapsed_ms);
-        }
-        GatewayEvent::TextDelta(_) => {
-            timings.first_text_ms.get_or_insert(elapsed_ms);
-            timings.first_token_ms.get_or_insert(elapsed_ms);
-        }
-        // `response.output_item.added` 会先投影一个空参数的 tool delta；它只是结构帧，
-        // 不能抢在真实工具参数之前成为首个可消费 token。
-        GatewayEvent::ToolCallDelta(delta) if !delta.arguments_delta.is_empty() => {
-            timings.first_token_ms.get_or_insert(elapsed_ms);
-        }
-        GatewayEvent::CalculatedCost(_) | GatewayEvent::ProviderCost(_) => {}
-        _ => {}
-    }
-}
-
-fn elapsed_ms(started_at: Instant) -> u64 {
-    duration_ms(started_at.elapsed())
-}
-
 fn duration_ms(duration: Duration) -> u64 {
     u64::try_from(duration.as_millis()).unwrap_or(u64::MAX)
 }
+
+fn record_trace_error(trace: &TraceContext, error: &ProviderError) {
+    trace.record("attempt.failed", json!({
+        "kind": error.kind().as_str(), "sendState": format!("{:?}", error.send_state()),
+        "diagnostic": error.diagnostic().map(|diagnostic| json!({
+            "stage": diagnostic.stage(), "code": diagnostic.code(), "message": diagnostic.as_str(),
+        })),
+        "upstreamStatus": error.upstream_status(),
+        "upstreamCode": error.upstream_code().map(|code| code.as_str()),
+        "rawError": error.raw_upstream_error().map(|raw| {
+            let value = serde_json::from_str(raw.as_str()).unwrap_or_else(|_| json!(raw.as_str()));
+            crate::diagnostics::diagnostic_json(&value)
+        }),
+    }));
+}

backend/crates/gateway-core/src/engine/execution.rs

@@ -14,6 +14,7 @@ use uuid::Uuid;
 use crate::engine::admission::{
     ClientAdmissionDecision, ClientAdmissionPort, ClientAdmissionRejection, ClientAdmissionRequest,
 };
+use crate::engine::budget::{ClientBudgetCharge, ClientBudgetPort};
 use crate::engine::continuation::{
     ContinuationBinding, NativeContinuationPin, NativeContinuationPort,
     NativeContinuationStoreErrorKind, PreviousResponseId,
@@ -31,12 +32,12 @@ use crate::engine::{
 };
 use crate::error::{GatewayError, GatewayErrorKind, ProviderErrorKind, StoreError};
 use crate::event::{GatewayEvent, ProviderEvent, ProviderResponseHeader};
+use crate::identity::ProviderKind;
 use crate::lifecycle::CancellationToken;
 use crate::operation::{Operation, ProviderSessionState};
 use crate::policy::{ClientApiKeyId, ClientPolicy};
 use crate::routing::{
-    ProviderKind, PublicModelId, PublicModelProfile, RoutingContext, RuntimeSnapshot,
-    UpstreamModelId,
+    PublicModelId, PublicModelProfile, RoutingContext, RuntimeSnapshot, UpstreamModelId,
 };
 use crate::runtime::RuntimeSnapshotHandle;
 
@@ -155,6 +156,9 @@ pub struct StartedExecution {
 }
 
 pub trait ExecutionSession: Send {
+    fn trace(&self) -> crate::diagnostics::TraceContext {
+        crate::diagnostics::TraceContext::default()
+    }
     fn next_event(&mut self) -> BoxFuture<'_, Result<Option<CoordinatedEvent>, EngineError>>;
     fn collect_uncommitted(&mut self) -> BoxFuture<'_, Result<Vec<ProviderEvent>, EngineError>>;
     fn response_headers(&self) -> &[ProviderResponseHeader];
@@ -253,6 +257,7 @@ pub struct DefaultExecutionService {
     circuits: Arc<dyn ProviderCircuitPort>,
     continuation: Arc<dyn NativeContinuationPort>,
     client_api_key_usage: Arc<dyn ClientApiKeyUsageSink>,
+    budget: Option<Arc<dyn ClientBudgetPort>>,
 }
 
 impl DefaultExecutionService {
@@ -280,9 +285,16 @@ impl DefaultExecutionService {
             circuits,
             continuation,
             client_api_key_usage,
+            budget: None,
         }
     }
 
+    #[must_use]
+    pub fn with_budget(mut self, budget: Arc<dyn ClientBudgetPort>) -> Self {
+        self.budget = Some(budget);
+        self
+    }
+
     async fn start_inner(&self, request: StartExecution) -> Result<StartedExecution, GatewayError> {
         let StartExecution {
             client,
@@ -322,9 +334,18 @@ impl DefaultExecutionService {
         &self,
         mut request: PendingStartExecution,
     ) -> Result<StartedExecution, GatewayError> {
-        request.client.policy.authorize().map_err(|_| {
-            GatewayError::new(GatewayErrorKind::PolicyDenied, "client API key is disabled")
-        })?;
+        // 长连接每次执行都重新鉴权并冻结当前策略，确保限额和授权变更对新请求生效。
+        request.client = self
+            .authenticate(request.client.policy.plaintext_key().expose_for_auth())
+            .map_err(|error| match error {
+                ClientAuthenticationError::InvalidKey => {
+                    GatewayError::new(GatewayErrorKind::Unauthorized, "client API key is invalid")
+                }
+                ClientAuthenticationError::SnapshotUnavailable => GatewayError::new(
+                    GatewayErrorKind::Internal,
+                    "runtime snapshot is unavailable",
+                ),
+            })?;
         let started_at = SystemTime::now();
         let deadline_at = started_at
             .checked_add(MODEL_REQUEST_DEADLINE)
@@ -501,6 +522,12 @@ impl DefaultExecutionService {
             client_api_key_id: client.policy.key_id().clone(),
             model_request_id: request_id.clone(),
         };
+        if let Some(budget) = &self.budget
+            && let Err(error) = budget.admit(client.policy.key_id().clone()).await
+        {
+            admission.release().await;
+            return Err(error);
+        }
         let observation = plan
             .candidates()
             .first()
@@ -521,7 +548,7 @@ impl DefaultExecutionService {
             operation: operation.kind(),
             endpoint: metadata.endpoint,
             client_transport: metadata.transport.as_str().to_owned(),
-            requested_model: target.into_public_model(),
+            requested_model: target.into_public_model().or(observation.requested_model),
             client_ip: metadata.client_ip,
             user_agent: metadata.user_agent,
             reasoning_effort: observation.reasoning_effort,
@@ -549,6 +576,18 @@ impl DefaultExecutionService {
         {
             Ok(core) => core,
             Err(error) => {
+                if let Some(budget) = &self.budget {
+                    settle_budget(
+                        budget.as_ref(),
+                        ClientBudgetCharge {
+                            key_id: client.policy.key_id().clone(),
+                            request_id: request_id.clone(),
+                            amount_usd: crate::metering::Decimal::ZERO,
+                            completed_at: SystemTime::now(),
+                        },
+                    )
+                    .await;
+                }
                 admission.release().await;
                 return Err(gateway_error_from_engine(&error));
             }
@@ -562,6 +601,7 @@ impl DefaultExecutionService {
                 admission,
                 Arc::clone(&self.circuits),
                 Arc::clone(&self.continuation),
+                self.budget.clone(),
             )),
         })
     }
@@ -919,6 +959,12 @@ struct AdmissionLease {
     model_request_id: ModelRequestId,
 }
 
+async fn settle_budget(port: &dyn ClientBudgetPort, charge: ClientBudgetCharge) {
+    if let Err(error) = port.settle(charge).await {
+        tracing::error!(%error, "Client budget settlement failed; storage will retry on the next request");
+    }
+}
+
 impl AdmissionLease {
     async fn release(self) {
         if let Err(error) = self
@@ -938,6 +984,7 @@ struct DefaultExecutionSession {
     continuation: Arc<dyn NativeContinuationPort>,
     observed_provider_outcomes: usize,
     continuation_recorded: bool,
+    budget: Option<Arc<dyn ClientBudgetPort>>,
 }
 
 impl DefaultExecutionSession {
@@ -946,6 +993,7 @@ impl DefaultExecutionSession {
         admission: AdmissionLease,
         circuits: Arc<dyn ProviderCircuitPort>,
         continuation: Arc<dyn NativeContinuationPort>,
+        budget: Option<Arc<dyn ClientBudgetPort>>,
     ) -> Self {
         Self {
             core: Some(core),
@@ -954,6 +1002,7 @@ impl DefaultExecutionSession {
             continuation,
             observed_provider_outcomes: 0,
             continuation_recorded: false,
+            budget,
         }
     }
 
@@ -970,6 +1019,11 @@ impl DefaultExecutionSession {
             .is_some_and(ResponseExecutionSession::is_finalized)
             && let Some(admission) = self.admission.take()
         {
+            if let Some(budget) = self.budget.take()
+                && let Some(core) = &self.core
+            {
+                settle_budget(budget.as_ref(), core.budget_charge()).await;
+            }
             admission.release().await;
         }
     }
@@ -1020,6 +1074,9 @@ impl DefaultExecutionSession {
             .get(self.observed_provider_outcomes..)
             .unwrap_or_default();
         publish_provider_attempt_outcomes(self.circuits.as_ref(), pending).await;
+        if let Some(budget) = self.budget.take() {
+            settle_budget(budget.as_ref(), core.budget_charge()).await;
+        }
         if let Some(admission) = self.admission.take() {
             admission.release().await;
         }
@@ -1035,6 +1092,12 @@ impl Drop for DefaultExecutionSession {
 }
 
 impl ExecutionSession for DefaultExecutionSession {
+    fn trace(&self) -> crate::diagnostics::TraceContext {
+        self.core
+            .as_ref()
+            .map(ResponseExecutionSession::trace)
+            .unwrap_or_default()
+    }
     fn next_event(&mut self) -> BoxFuture<'_, Result<Option<CoordinatedEvent>, EngineError>> {
         Box::pin(async move {
             let result = self.core_mut()?.next_event().await;
@@ -1202,11 +1265,22 @@ fn new_request_id() -> Result<ModelRequestId, GatewayError> {
         .map_err(|_| GatewayError::new(GatewayErrorKind::Internal, "failed to allocate request ID"))
 }
 
-fn map_routing_error(error: crate::error::RoutingError) -> GatewayError {
+fn map_routing_error(error: crate::validation::RoutingError) -> GatewayError {
     match error {
-        crate::error::RoutingError::NoCapableProvider { .. }
-        | crate::error::RoutingError::NoCapableProviderEndpoint { .. }
-        | crate::error::RoutingError::EmptyAccountScope => GatewayError::new(
+        crate::validation::RoutingError::ModelNotFound {
+            model,
+            mapped_model,
+        } => GatewayError::new(
+            GatewayErrorKind::ModelNotFound,
+            if model == mapped_model {
+                "the requested model was not found in the provider catalogs available to this API key; check the model name"
+            } else {
+                "the requested model maps to an upstream model that was not found in the provider catalogs available to this API key; check the configured model mapping"
+            },
+        ),
+        crate::validation::RoutingError::NoCapableProvider { .. }
+        | crate::validation::RoutingError::NoCapableProviderEndpoint { .. }
+        | crate::validation::RoutingError::EmptyAccountScope => GatewayError::new(
             GatewayErrorKind::NoAvailableProvider,
             "no provider can execute this request",
         ),

backend/crates/gateway-core/src/engine/mod.rs

@@ -1,9 +1,11 @@
 //! 模型请求生命周期、单行持久化 port 与 commit/send/cancellation 边界。
 
 pub mod admission;
+pub mod budget;
 pub mod continuation;
 pub mod coordinator;
 pub mod execution;
+mod observation;
 pub mod probe;
 pub mod provider;
 
@@ -22,17 +24,18 @@ use thiserror::Error;
 use crate::account::{AccountSelectionPolicy, ProviderAccountId};
 use crate::engine::continuation::{ContinuationBinding, NativeContinuationPin};
 use crate::error::{
-    GatewayError, IdentifierError, ProviderConnectionObservation, ProviderError, ProviderErrorKind,
-    StoreError, validate_text,
+    GatewayError, ProviderConnectionObservation, ProviderError, ProviderErrorKind, StoreError,
 };
 use crate::event::ProviderEvent;
+use crate::identity::ProviderKind;
 use crate::lifecycle::CancellationToken;
 use crate::metering::{CostEstimate, Usage};
 use crate::operation::OperationKind;
 use crate::operation::ProviderSessionState;
 use crate::policy::ClientApiKeyId;
-use crate::routing::{ConfigRevision, ProviderKind, PublicModelId, UpstreamModelId};
+use crate::routing::{ConfigRevision, PublicModelId, UpstreamModelId};
 use crate::upstream::UpstreamSendState;
+use crate::validation::{IdentifierError, validate_text};
 
 /// `model_requests.id`。
 #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
@@ -153,7 +156,7 @@ pub struct AccountAttemptContext {
     state_owner: Option<ProviderAccountStateOwner>,
     credential_recovery_attempted: bool,
     diagnostic_required_account: bool,
-    account_scope: Option<Arc<crate::routing::FrozenAccountScope>>,
+    account_scope: Option<Arc<crate::account::scope::FrozenAccountScope>>,
 }
 
 impl AccountAttemptContext {
@@ -194,7 +197,10 @@ impl AccountAttemptContext {
 
     /// 附着普通请求认证时冻结的账号范围。
     #[must_use]
-    pub fn with_account_scope(mut self, scope: Arc<crate::routing::FrozenAccountScope>) -> Self {
+    pub fn with_account_scope(
+        mut self,
+        scope: Arc<crate::account::scope::FrozenAccountScope>,
+    ) -> Self {
         self.account_scope = Some(scope);
         self
     }
@@ -233,7 +239,7 @@ impl AccountAttemptContext {
     }
 
     #[must_use]
-    pub const fn account_scope(&self) -> Option<&Arc<crate::routing::FrozenAccountScope>> {
+    pub const fn account_scope(&self) -> Option<&Arc<crate::account::scope::FrozenAccountScope>> {
         self.account_scope.as_ref()
     }
 }
@@ -311,6 +317,7 @@ pub struct RequestAttemptContext {
     request_id: ModelRequestId,
     client_api_key_ref: ClientApiKeyId,
     timing_started_at: Instant,
+    trace: crate::diagnostics::TraceContext,
 }
 
 impl RequestAttemptContext {
@@ -320,9 +327,16 @@ impl RequestAttemptContext {
             request_id,
             client_api_key_ref,
             timing_started_at: Instant::now(),
+            trace: crate::diagnostics::TraceContext::default(),
         }
     }
 
+    #[must_use]
+    pub fn with_trace(mut self, trace: crate::diagnostics::TraceContext) -> Self {
+        self.trace = trace;
+        self
+    }
+
     /// 覆盖本次请求的单调计时原点。
     #[must_use]
     pub fn with_timing_started_at(mut self, timing_started_at: Instant) -> Self {
@@ -362,6 +376,12 @@ pub struct AttemptContext {
 }
 
 impl AttemptContext {
+    /// 当前 attempt 的诊断关联；克隆后可传给后台 transport 任务。
+    #[must_use]
+    pub fn trace(&self) -> crate::diagnostics::TraceContext {
+        self.request.trace.attempt(self.attempt_index.get())
+    }
+
     #[must_use]
     pub const fn new(
         request: RequestAttemptContext,
@@ -469,7 +489,7 @@ impl AttemptContext {
 
     /// 普通请求认证时冻结的账号范围；管理端诊断为 `None`。
     #[must_use]
-    pub const fn account_scope(&self) -> Option<&Arc<crate::routing::FrozenAccountScope>> {
+    pub const fn account_scope(&self) -> Option<&Arc<crate::account::scope::FrozenAccountScope>> {
         self.account.account_scope()
     }
 
@@ -607,6 +627,8 @@ pub struct ModelRequestFinalization {
     pub service_tier: Option<String>,
     /// Provider 已筛选的专有观测 JSON；Core 不解释字段。
     pub provider_metadata_json: Option<String>,
+    /// 请求全程的有界诊断快照，跨 Provider 与重试保留。
+    pub diagnostic_trace_json: Option<String>,
     pub error: Option<GatewayError>,
     pub provider_error_code: Option<String>,
     /// Provider 返回的原始错误正文或 WebSocket close/error frame。

backend/crates/gateway-core/src/engine/observation.rs

@@ -0,0 +1,127 @@
+//! 单次响应的计量、时间与响应身份事实；重试丢弃时统一清理。
+
+use super::ModelRequestTimings;
+use crate::event::GatewayEvent;
+use crate::event::ProviderResponseObservation;
+use crate::metering::{CostEstimate, CostSource, Usage};
+use std::time::Instant;
+
+pub(super) struct ResponseObservation {
+    pub(super) timing_started_at: Instant,
+    pub(super) usage: Usage,
+    pub(super) cost: CostEstimate,
+    pub(super) timings: ModelRequestTimings,
+    pub(super) client_response_id: Option<String>,
+    pub(super) upstream_response_id: Option<String>,
+}
+
+impl ResponseObservation {
+    pub(super) fn new(timing_started_at: Instant) -> Self {
+        Self {
+            timing_started_at,
+            usage: Usage::new(),
+            cost: CostEstimate::unavailable(),
+            timings: ModelRequestTimings::default(),
+            client_response_id: None,
+            upstream_response_id: None,
+        }
+    }
+
+    fn elapsed_ms(&self) -> u64 {
+        u64::try_from(self.timing_started_at.elapsed().as_millis()).unwrap_or(u64::MAX)
+    }
+
+    pub(super) fn finish(&mut self) {
+        self.timings.latency_ms = Some(self.elapsed_ms());
+    }
+
+    pub(super) fn observe_event(&mut self, event: &GatewayEvent) {
+        let elapsed = self.elapsed_ms();
+        observe_event_timing(&mut self.timings, event, elapsed);
+        if let GatewayEvent::Usage(observed) = event {
+            self.usage.merge(observed);
+        }
+        if let GatewayEvent::CalculatedCost(observed) = event
+            && self.cost.source() != CostSource::ProviderReported
+        {
+            self.cost = observed.into_estimate();
+        }
+        if let GatewayEvent::ProviderCost(observed) = event {
+            self.cost = observed.into_estimate();
+        }
+    }
+
+    pub(super) fn observe_identity(&mut self, event: &GatewayEvent) {
+        let metadata = match event {
+            GatewayEvent::Started(metadata) | GatewayEvent::Completed(metadata) => metadata,
+            _ => return,
+        };
+        let response_id = metadata.response_id().to_owned();
+        self.client_response_id = Some(response_id.clone());
+        self.upstream_response_id = Some(response_id);
+    }
+
+    pub(super) fn reset_for_attempt(&mut self) {
+        self.usage = Usage::new();
+        self.cost = CostEstimate::unavailable();
+        self.client_response_id = None;
+        self.upstream_response_id = None;
+        self.timings.transport_decision_wait_ms = None;
+        self.timings.connect_ms = None;
+        self.timings.headers_ms = None;
+        self.timings.first_event_ms = None;
+        self.timings.first_reasoning_ms = None;
+        self.timings.first_text_ms = None;
+        self.timings.first_token_ms = None;
+        self.timings.provider_processing_ms = None;
+    }
+
+    pub(super) fn observe_response(&mut self, observation: &ProviderResponseObservation) {
+        let observed = observation.timings();
+        if let Some(value) = observed.transport_decision_wait_ms {
+            self.timings.transport_decision_wait_ms = Some(value);
+        }
+        if let Some(value) = observed.connect_ms {
+            self.timings.connect_ms = Some(value);
+        }
+        if let Some(value) = observed.headers_ms {
+            self.timings.headers_ms = Some(value);
+        }
+        if let Some(value) = observed.first_event_ms {
+            self.timings.first_event_ms = Some(value);
+        }
+        if let Some(value) = observed.first_reasoning_ms {
+            self.timings.first_reasoning_ms = Some(value);
+        }
+        if let Some(value) = observed.first_text_ms {
+            self.timings.first_text_ms = Some(value);
+        }
+        if let Some(value) = observed.first_token_ms {
+            self.timings.first_token_ms = Some(value);
+        }
+        if let Some(value) = observed.provider_processing_ms {
+            self.timings.provider_processing_ms = Some(value);
+        }
+    }
+}
+
+fn observe_event_timing(timings: &mut ModelRequestTimings, event: &GatewayEvent, elapsed_ms: u64) {
+    timings.first_event_ms.get_or_insert(elapsed_ms);
+    match event {
+        GatewayEvent::ReasoningDelta(_) => {
+            timings.first_reasoning_ms.get_or_insert(elapsed_ms);
+            timings.first_token_ms.get_or_insert(elapsed_ms);
+        }
+        GatewayEvent::TextDelta(_) => {
+            timings.first_text_ms.get_or_insert(elapsed_ms);
+            timings.first_token_ms.get_or_insert(elapsed_ms);
+        }
+        // `response.output_item.added` 会先投影一个空参数的 tool delta；它只是结构帧，
+        // 不能抢在真实工具参数之前成为首个可消费 token。
+        GatewayEvent::ToolCallDelta(delta) if !delta.arguments_delta.is_empty() => {
+            timings.first_token_ms.get_or_insert(elapsed_ms);
+        }
+        GatewayEvent::CalculatedCost(_) | GatewayEvent::ProviderCost(_) => {}
+        _ => {}
+    }
+}

backend/crates/gateway-core/src/engine/probe.rs

@@ -6,7 +6,8 @@ use bytes::Bytes;
 use futures::future::BoxFuture;
 
 use crate::error::{ClientVisibleUpstreamResponse, GatewayError, GatewayErrorKind};
-use crate::routing::{ProviderKind, UpstreamModelId};
+use crate::identity::ProviderKind;
+use crate::routing::UpstreamModelId;
 use crate::{account::ProviderAccountId, operation::Operation, upstream::UpstreamSendState};
 
 #[derive(Debug, Clone, PartialEq)]

backend/crates/gateway-core/src/engine/provider.rs

@@ -15,13 +15,15 @@ use crate::account::{
     AccountAttemptFeedback, AccountCapacitySnapshot, AccountFeedbackStats, ProviderAccountId,
 };
 use crate::engine::AttemptContext;
-use crate::error::{OpaqueUpstreamValue, PreDeliveryRetry, ProviderError, ProviderErrorKind};
+use crate::error::{PreDeliveryRetry, ProviderError, ProviderErrorKind};
 use crate::event::{EventSequenceValidator, ProviderEvent};
+use crate::identity::ProviderKind;
 use crate::operation::Operation;
 use crate::policy::ClientApiKeyId;
 use crate::routing::{
-    ModelCapabilities, ModelPresentation, ProviderCandidate, ProviderKind, UpstreamModelId,
+    ModelCapabilities, ModelPresentation, ProviderCandidate, PublicModelId, UpstreamModelId,
 };
+use crate::upstream::OpaqueUpstreamValue;
 use crate::upstream::{UpstreamSendState, UpstreamTransport};
 
 /// Box 只出现在 Provider Registry 的统一 event envelope 边界。
@@ -416,6 +418,8 @@ pub struct ProviderRequest {
 /// Provider 对公共观测表可解释的请求语义；未知字段保持空值。
 #[derive(Debug, Clone, Default, PartialEq, Eq)]
 pub struct ProviderRequestObservation {
+    /// 独立 Provider 端点声明的请求模型，仅用于观测，不参与文本模型目录路由。
+    pub requested_model: Option<PublicModelId>,
     /// 客户端原始请求中的推理强度。
     pub reasoning_effort: Option<String>,
     pub reasoning_preset: Option<String>,