diff --git a/.github/workflows/ssh-relay-runtime-artifacts.yml b/.github/workflows/ssh-relay-runtime-artifacts.yml
index f58cadb26c0..52e7101ccc0 100644
--- a/.github/workflows/ssh-relay-runtime-artifacts.yml
+++ b/.github/workflows/ssh-relay-runtime-artifacts.yml
@@ -168,6 +168,9 @@ jobs:
           node --check config/scripts/ssh-relay-runtime-manifest-signing-handoff.test.mjs
           node --check config/scripts/ssh-relay-runtime-manifest-seed-signing.mjs
           node --check config/scripts/ssh-relay-runtime-manifest-seed-signing.test.mjs
+          node --check config/scripts/ssh-relay-runtime-manifest-artifact-collection.mjs
+          node --check config/scripts/ssh-relay-runtime-manifest-aggregate-command.mjs
+          node --check config/scripts/ssh-relay-runtime-manifest-aggregate-command.test.mjs
           node --check config/scripts/ssh-relay-runtime-manifest-aggregate.mjs
           node --check config/scripts/ssh-relay-runtime-manifest-aggregate.test.mjs
           node --check config/scripts/ssh-relay-runtime-manifest-tuple.mjs
@@ -215,6 +218,7 @@ jobs:
             config/scripts/ssh-relay-runtime-manifest-assembly.test.mjs \
             config/scripts/ssh-relay-runtime-manifest-signing-handoff.test.mjs \
             config/scripts/ssh-relay-runtime-manifest-seed-signing.test.mjs \
+            config/scripts/ssh-relay-runtime-manifest-aggregate-command.test.mjs \
             config/scripts/ssh-relay-runtime-manifest-aggregate.test.mjs \
             config/scripts/ssh-relay-runtime-manifest-tuple.test.mjs \
             config/scripts/ssh-relay-runtime-post-sign-metadata.test.mjs \
@@ -585,6 +589,12 @@ jobs:
           if ($LASTEXITCODE -ne 0) { throw 'runtime manifest seed signing syntax check failed' }
           node --check config/scripts/ssh-relay-runtime-manifest-seed-signing.test.mjs
           if ($LASTEXITCODE -ne 0) { throw 'runtime manifest seed signing test syntax check failed' }
+          node --check config/scripts/ssh-relay-runtime-manifest-artifact-collection.mjs
+          if ($LASTEXITCODE -ne 0) { throw 'runtime manifest artifact collection syntax check failed' }
+          node --check config/scripts/ssh-relay-runtime-manifest-aggregate-command.mjs
+          if ($LASTEXITCODE -ne 0) { throw 'runtime manifest aggregate command syntax check failed' }
+          node --check config/scripts/ssh-relay-runtime-manifest-aggregate-command.test.mjs
+          if ($LASTEXITCODE -ne 0) { throw 'runtime manifest aggregate command test syntax check failed' }
           node --check config/scripts/ssh-relay-runtime-manifest-aggregate.mjs
           if ($LASTEXITCODE -ne 0) { throw 'runtime manifest aggregate syntax check failed' }
           node --check config/scripts/ssh-relay-runtime-manifest-aggregate.test.mjs
@@ -650,6 +660,7 @@ jobs:
             config/scripts/ssh-relay-runtime-manifest-assembly.test.mjs `
             config/scripts/ssh-relay-runtime-manifest-signing-handoff.test.mjs `
             config/scripts/ssh-relay-runtime-manifest-seed-signing.test.mjs `
+            config/scripts/ssh-relay-runtime-manifest-aggregate-command.test.mjs `
             config/scripts/ssh-relay-runtime-manifest-aggregate.test.mjs `
             config/scripts/ssh-relay-runtime-manifest-tuple.test.mjs `
             config/scripts/ssh-relay-runtime-post-sign-metadata.test.mjs `
diff --git a/config/scripts/ssh-relay-runtime-manifest-aggregate-command.mjs b/config/scripts/ssh-relay-runtime-manifest-aggregate-command.mjs
new file mode 100644
index 00000000000..4bc3f018908
--- /dev/null
+++ b/config/scripts/ssh-relay-runtime-manifest-aggregate-command.mjs
@@ -0,0 +1,401 @@
+import { createHash } from 'node:crypto'
+import { lstat, mkdir, readFile, realpath, rm, writeFile } from 'node:fs/promises'
+import { basename, dirname, join, resolve } from 'node:path'
+import { pathToFileURL } from 'node:url'
+
+import { collectSshRelayRuntimeManifestArtifacts } from './ssh-relay-runtime-manifest-artifact-collection.mjs'
+import {
+  finalizeSshRelayRuntimeManifestAggregate,
+  prepareSshRelayRuntimeManifestAggregate
+} from './ssh-relay-runtime-manifest-aggregate.mjs'
+import {
+  decodeSshRelayRuntimeManifestSigningRequestArtifact,
+  encodeSshRelayRuntimeManifestSigningRequestArtifact
+} from './ssh-relay-runtime-manifest-seed-signing.mjs'
+import { sshRelayRuntimeManifestKeyId } from './ssh-relay-runtime-manifest-signing-handoff.mjs'
+
+const MAX_JSON_BYTES = 48 * 1024 * 1024
+const SOURCE_SHA = /^[0-9a-f]{40}$/u
+const TIMESTAMP = /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{3}Z$/u
+const BASE64 = /^[A-Za-z0-9+/]+={0,2}$/u
+const DIGEST = /^sha256:[0-9a-f]{64}$/u
+const PREPARED_FIELDS = [
+  'acceptedKeysSha256',
+  'createdAt',
+  'inputTuples',
+  'inputTuplesSha256',
+  'relayProtocolVersion',
+  'releaseTag',
+  'schemaVersion',
+  'signingRequest',
+  'sourceSha',
+  'unsignedManifest'
+]
+
+function assertObject(value, label) {
+  if (value === null || typeof value !== 'object' || Array.isArray(value)) {
+    throw new Error(`SSH relay runtime manifest aggregate command ${label} must be an object`)
+  }
+}
+
+function assertExactFields(value, fields, label) {
+  assertObject(value, label)
+  const actual = Object.keys(value).sort()
+  const expected = [...fields].sort()
+  if (JSON.stringify(actual) !== JSON.stringify(expected)) {
+    throw new Error(`SSH relay runtime manifest aggregate command ${label} has invalid fields`)
+  }
+}
+
+function sha256(bytes) {
+  return `sha256:${createHash('sha256').update(bytes).digest('hex')}`
+}
+
+function canonicalJson(value) {
+  return Buffer.from(`${JSON.stringify(value)}\n`, 'utf8')
+}
+
+function parseReleaseTag(tag) {
+  for (const [pattern, channel] of [
+    [/^v(\d+\.\d+\.\d+)$/u, 'stable'],
+    [/^v(\d+\.\d+\.\d+-rc\.\d+)$/u, 'rc'],
+    [/^v(\d+\.\d+\.\d+-rc\.\d+\.perf)$/u, 'perf']
+  ]) {
+    const match = pattern.exec(tag)
+    if (match) {
+      return { tag, version: match[1], channel }
+    }
+  }
+  throw new Error('SSH relay runtime manifest aggregate command release tag is invalid')
+}
+
+function commandIdentity(input) {
+  if (!SOURCE_SHA.test(input.sourceSha ?? '')) {
+    throw new Error('SSH relay runtime manifest aggregate command source SHA is invalid')
+  }
+  const release = parseReleaseTag(input.releaseTag)
+  if (
+    typeof input.createdAt !== 'string' ||
+    !TIMESTAMP.test(input.createdAt) ||
+    new Date(input.createdAt).toISOString() !== input.createdAt
+  ) {
+    throw new Error('SSH relay runtime manifest aggregate command timestamp is invalid')
+  }
+  if (!Number.isSafeInteger(input.relayProtocolVersion) || input.relayProtocolVersion <= 0) {
+    throw new Error('SSH relay runtime manifest aggregate command protocol version is invalid')
+  }
+  return {
+    sourceSha: input.sourceSha,
+    releaseTag: input.releaseTag,
+    createdAt: input.createdAt,
+    relayProtocolVersion: input.relayProtocolVersion,
+    build: { ...release, relayProtocolVersion: input.relayProtocolVersion }
+  }
+}
+
+async function readBoundedJson(path, label) {
+  const before = await lstat(path, { bigint: true })
+  if (
+    !before.isFile() ||
+    before.isSymbolicLink() ||
+    before.size <= 0n ||
+    before.size > BigInt(MAX_JSON_BYTES)
+  ) {
+    throw new Error(
+      `SSH relay runtime manifest aggregate command ${label} must be bounded regular JSON`
+    )
+  }
+  try {
+    const bytes = await readFile(path)
+    const after = await lstat(path, { bigint: true })
+    if (
+      before.dev !== after.dev ||
+      before.ino !== after.ino ||
+      before.size !== after.size ||
+      before.mtimeNs !== after.mtimeNs ||
+      before.ctimeNs !== after.ctimeNs
+    ) {
+      throw new Error('file changed while reading')
+    }
+    return JSON.parse(bytes.toString('utf8'))
+  } catch (error) {
+    throw new Error(
+      `SSH relay runtime manifest aggregate command ${label} is invalid JSON: ${error.message}`
+    )
+  }
+}
+
+function decodeCanonicalBase64(value, label, expectedSize) {
+  if (typeof value !== 'string' || !BASE64.test(value)) {
+    throw new Error(`SSH relay runtime manifest aggregate command ${label} is not canonical base64`)
+  }
+  const bytes = Buffer.from(value, 'base64')
+  if (bytes.length !== expectedSize || bytes.toString('base64') !== value) {
+    throw new Error(
+      `SSH relay runtime manifest aggregate command ${label} must contain ${expectedSize} bytes`
+    )
+  }
+  return bytes
+}
+
+async function readAcceptedKeys(path) {
+  const document = await readBoundedJson(resolve(path), 'accepted keys')
+  assertExactFields(document, ['keys', 'schemaVersion'], 'accepted keys')
+  if (
+    document.schemaVersion !== 1 ||
+    !Array.isArray(document.keys) ||
+    document.keys.length === 0 ||
+    document.keys.length > 4
+  ) {
+    throw new Error('SSH relay runtime manifest aggregate command accepted keys are invalid')
+  }
+  const seen = new Set()
+  const artifactKeys = document.keys
+    .map((key, index) => {
+      assertExactFields(key, ['keyId', 'publicKeyBase64'], `accepted key ${index}`)
+      const publicKey = decodeCanonicalBase64(key.publicKeyBase64, 'accepted public key', 32)
+      const keyId = sshRelayRuntimeManifestKeyId(publicKey)
+      if (!DIGEST.test(key.keyId ?? '') || key.keyId !== keyId || seen.has(keyId)) {
+        throw new Error(
+          'SSH relay runtime manifest aggregate command accepted key identity is invalid'
+        )
+      }
+      seen.add(keyId)
+      return { keyId, publicKeyBase64: key.publicKeyBase64, publicKey }
+    })
+    .sort((left, right) => (left.keyId < right.keyId ? -1 : left.keyId > right.keyId ? 1 : 0))
+  const serialized = artifactKeys.map(({ keyId, publicKeyBase64 }) => ({ keyId, publicKeyBase64 }))
+  return {
+    acceptedKeys: artifactKeys.map(({ keyId, publicKey }) => ({ keyId, publicKey })),
+    sha256: sha256(canonicalJson({ schemaVersion: 1, keys: serialized }))
+  }
+}
+
+async function exclusiveOutputDirectory(outputDirectory) {
+  const absolute = resolve(outputDirectory)
+  const parent = resolve(await realpath(dirname(absolute)))
+  const parentMetadata = await lstat(parent)
+  if (!parentMetadata.isDirectory() || parentMetadata.isSymbolicLink()) {
+    throw new Error('SSH relay runtime manifest aggregate command output parent must be real')
+  }
+  const output = resolve(parent, basename(absolute))
+  try {
+    await lstat(output)
+  } catch (error) {
+    if (error.code === 'ENOENT') {
+      return output
+    }
+    throw error
+  }
+  throw new Error(
+    'SSH relay runtime manifest aggregate command requires an exclusive output directory'
+  )
+}
+
+function assertReceiptBindings(bindings, prepared) {
+  const tuples = new Map(prepared.unsignedManifest.tuples.map((tuple) => [tuple.tupleId, tuple]))
+  for (const binding of bindings) {
+    if (tuples.get(binding.tupleId)?.contentId !== binding.contentId) {
+      throw new Error(
+        `SSH relay runtime manifest aggregate command receipt content drifted: ${binding.tupleId}`
+      )
+    }
+  }
+}
+
+function preparedArtifact(identity, acceptedKeysSha256, prepared) {
+  return {
+    schemaVersion: 1,
+    sourceSha: identity.sourceSha,
+    releaseTag: identity.releaseTag,
+    createdAt: identity.createdAt,
+    relayProtocolVersion: identity.relayProtocolVersion,
+    acceptedKeysSha256,
+    inputTuples: prepared.inputTuples,
+    inputTuplesSha256: prepared.inputTuplesSha256,
+    unsignedManifest: prepared.unsignedManifest,
+    signingRequest: encodeSshRelayRuntimeManifestSigningRequestArtifact(prepared.signingRequest)
+  }
+}
+
+async function collectAndPrepare(input, output, identity, signal) {
+  const stagingDirectory = join(output, 'aggregate-input')
+  await mkdir(stagingDirectory)
+  const bindings = await collectSshRelayRuntimeManifestArtifacts({
+    artifactsDirectory: input.artifactsDirectory,
+    stagingDirectory,
+    signal
+  })
+  const prepared = await prepareSshRelayRuntimeManifestAggregate({
+    inputDirectory: stagingDirectory,
+    build: identity.build,
+    createdAt: identity.createdAt,
+    tupleInputs: bindings.map(({ aggregateInput }) => aggregateInput),
+    signal
+  })
+  assertReceiptBindings(bindings, prepared)
+  return prepared
+}
+
+export async function prepareSshRelayRuntimeManifestAggregateCommand(input) {
+  const identity = commandIdentity(input)
+  // Why: public-key policy must be valid before canonical bytes can leave this boundary.
+  const keys = await readAcceptedKeys(input.acceptedKeysPath)
+  const output = await exclusiveOutputDirectory(input.outputDirectory)
+  let created = false
+  try {
+    await mkdir(output, { mode: 0o700 })
+    created = true
+    const prepared = await collectAndPrepare(input, output, identity, input.signal)
+    const artifact = preparedArtifact(identity, keys.sha256, prepared)
+    await writeFile(join(output, 'prepared-aggregate.json'), canonicalJson(artifact), {
+      flag: 'wx',
+      mode: 0o600
+    })
+    await writeFile(join(output, 'signing-request.json'), canonicalJson(artifact.signingRequest), {
+      flag: 'wx',
+      mode: 0o600
+    })
+    await rm(join(output, 'aggregate-input'), { recursive: true, force: true })
+    return prepared
+  } catch (error) {
+    if (created) {
+      await rm(output, { recursive: true, force: true })
+    }
+    throw error
+  }
+}
+
+function normalizePreparedArtifact(value) {
+  assertExactFields(value, PREPARED_FIELDS, 'prepared aggregate')
+  if (value.schemaVersion !== 1 || !DIGEST.test(value.acceptedKeysSha256 ?? '')) {
+    throw new Error('SSH relay runtime manifest aggregate command prepared aggregate is invalid')
+  }
+  decodeSshRelayRuntimeManifestSigningRequestArtifact(value.signingRequest)
+  return value
+}
+
+function sameJson(left, right) {
+  return JSON.stringify(left) === JSON.stringify(right)
+}
+
+export async function finalizeSshRelayRuntimeManifestAggregateCommand(input) {
+  const identity = commandIdentity(input)
+  const keys = await readAcceptedKeys(input.acceptedKeysPath)
+  const prior = normalizePreparedArtifact(
+    await readBoundedJson(
+      join(resolve(input.preparedDirectory), 'prepared-aggregate.json'),
+      'prepared aggregate'
+    )
+  )
+  const signingResult = await readBoundedJson(resolve(input.signingResultPath), 'signing result')
+  assertExactFields(signingResult, ['keyId', 'signature'], 'signing result')
+  const output = await exclusiveOutputDirectory(input.outputDirectory)
+  let created = false
+  try {
+    await mkdir(output, { mode: 0o700 })
+    created = true
+    const prepared = await collectAndPrepare(input, output, identity, input.signal)
+    const current = preparedArtifact(identity, keys.sha256, prepared)
+    if (!sameJson(prior, current)) {
+      throw new Error('SSH relay runtime manifest aggregate command prepared receipt drifted')
+    }
+    const finalized = finalizeSshRelayRuntimeManifestAggregate({
+      prepared,
+      signingResults: [signingResult],
+      acceptedKeys: keys.acceptedKeys
+    })
+    const assets = join(output, 'assets')
+    const evidence = join(output, 'evidence')
+    await Promise.all([mkdir(assets), mkdir(evidence)])
+    await writeFile(join(assets, finalized.manifestAsset.name), finalized.bytes, {
+      flag: 'wx',
+      mode: 0o600
+    })
+    await writeFile(
+      join(evidence, 'manifest-aggregate.json'),
+      canonicalJson({
+        schemaVersion: 1,
+        sourceSha: identity.sourceSha,
+        releaseTag: identity.releaseTag,
+        acceptedKeysSha256: keys.sha256,
+        inputTuplesSha256: finalized.inputTuplesSha256,
+        manifestAsset: finalized.manifestAsset
+      }),
+      { flag: 'wx', mode: 0o600 }
+    )
+    await rm(join(output, 'aggregate-input'), { recursive: true, force: true })
+    return finalized
+  } catch (error) {
+    if (created) {
+      await rm(output, { recursive: true, force: true })
+    }
+    throw error
+  }
+}
+
+export function parseSshRelayRuntimeManifestAggregateCommandArguments(argv) {
+  const command = argv[0]
+  if (command !== 'prepare' && command !== 'finalize') {
+    throw new Error('SSH relay runtime manifest aggregate command requires prepare or finalize')
+  }
+  const fields = new Map([
+    ['--artifacts-directory', 'artifactsDirectory'],
+    ['--accepted-keys', 'acceptedKeysPath'],
+    ['--output-directory', 'outputDirectory'],
+    ['--source-sha', 'sourceSha'],
+    ['--release-tag', 'releaseTag'],
+    ['--created-at', 'createdAt'],
+    ['--relay-protocol-version', 'relayProtocolVersion'],
+    ['--prepared-directory', 'preparedDirectory'],
+    ['--signing-result', 'signingResultPath']
+  ])
+  const result = { command }
+  for (let index = 1; index < argv.length; index += 2) {
+    const field = fields.get(argv[index])
+    const value = argv[index + 1]
+    if (!field || !value || value.startsWith('--') || result[field]) {
+      throw new Error(
+        `Invalid SSH relay runtime manifest aggregate command argument: ${argv[index]}`
+      )
+    }
+    result[field] = field === 'relayProtocolVersion' ? Number(value) : value
+  }
+  const required = [
+    'artifactsDirectory',
+    'acceptedKeysPath',
+    'outputDirectory',
+    'sourceSha',
+    'releaseTag',
+    'createdAt',
+    'relayProtocolVersion'
+  ]
+  if (command === 'finalize') {
+    required.push('preparedDirectory', 'signingResultPath')
+  }
+  for (const field of required) {
+    if (!result[field]) {
+      throw new Error(`Missing SSH relay runtime manifest aggregate command argument: ${field}`)
+    }
+  }
+  return result
+}
+
+async function main() {
+  const options = parseSshRelayRuntimeManifestAggregateCommandArguments(process.argv.slice(2))
+  const operation =
+    options.command === 'prepare'
+      ? prepareSshRelayRuntimeManifestAggregateCommand
+      : finalizeSshRelayRuntimeManifestAggregateCommand
+  const result = await operation(options)
+  process.stdout.write(`${JSON.stringify({ inputTuplesSha256: result.inputTuplesSha256 })}\n`)
+}
+
+if (process.argv[1] && pathToFileURL(resolve(process.argv[1])).href === import.meta.url) {
+  main().catch((error) => {
+    process.stderr.write(
+      `SSH relay runtime manifest aggregate command failed: ${error.stack ?? error}\n`
+    )
+    process.exitCode = 1
+  })
+}
diff --git a/config/scripts/ssh-relay-runtime-manifest-aggregate-command.test.mjs b/config/scripts/ssh-relay-runtime-manifest-aggregate-command.test.mjs
new file mode 100644
index 00000000000..16e9fb78f7c
--- /dev/null
+++ b/config/scripts/ssh-relay-runtime-manifest-aggregate-command.test.mjs
@@ -0,0 +1,420 @@
+import { createHash } from 'node:crypto'
+import { lstat, mkdir, mkdtemp, readFile, rm, symlink, writeFile } from 'node:fs/promises'
+import { tmpdir } from 'node:os'
+import { join } from 'node:path'
+
+import nacl from 'tweetnacl'
+import { afterEach, describe, expect, it } from 'vitest'
+
+import { createSshRelayArtifactTestManifest } from '../../src/main/ssh/ssh-relay-artifact-test-manifest.ts'
+import { verifySshRelayArtifactManifest } from '../../src/main/ssh/ssh-relay-manifest-signature.ts'
+import { sshRelayRuntimeCompatibility } from './ssh-relay-runtime-compatibility.mjs'
+import { computeSshRelayRuntimeContentId } from './ssh-relay-runtime-identity.mjs'
+import {
+  finalizeSshRelayRuntimeManifestAggregateCommand,
+  parseSshRelayRuntimeManifestAggregateCommandArguments,
+  prepareSshRelayRuntimeManifestAggregateCommand
+} from './ssh-relay-runtime-manifest-aggregate-command.mjs'
+import {
+  encodeSshRelayRuntimeManifestSigningRequestArtifact,
+  signSshRelayRuntimeManifestRequest
+} from './ssh-relay-runtime-manifest-seed-signing.mjs'
+import { sshRelayRuntimeManifestKeyId } from './ssh-relay-runtime-manifest-signing-handoff.mjs'
+
+const temporaryDirectories = []
+const keyPair = nacl.sign.keyPair.fromSeed(Uint8Array.from({ length: 32 }, (_, index) => index))
+const TUPLES = [
+  'linux-x64-glibc',
+  'linux-arm64-glibc',
+  'darwin-x64',
+  'darwin-arm64',
+  'win32-x64',
+  'win32-arm64'
+]
+
+function digest(bytes) {
+  return `sha256:${createHash('sha256').update(bytes).digest('hex')}`
+}
+
+function fileReference(name, bytes) {
+  return { name, size: bytes.length, sha256: digest(bytes) }
+}
+
+function watcherPackage(tupleId) {
+  return tupleId.startsWith('linux-')
+    ? `@parcel/watcher-linux-${tupleId.split('-')[1]}-glibc`
+    : `@parcel/watcher-${tupleId}`
+}
+
+function nativeEntry(path, role, marker) {
+  return {
+    path,
+    type: 'file',
+    role,
+    size: marker.length,
+    mode: 0o755,
+    sha256: digest(marker)
+  }
+}
+
+function tupleFor(tupleId) {
+  const tuple = structuredClone(createSshRelayArtifactTestManifest().tuples[0])
+  const [os, architecture] = tupleId.split('-')
+  tuple.tupleId = tupleId
+  tuple.os = os
+  tuple.architecture = architecture
+  tuple.compatibility = structuredClone(sshRelayRuntimeCompatibility[tupleId])
+  const packageName = watcherPackage(tupleId)
+  tuple.entries = tuple.entries.map((entry) => {
+    const next = structuredClone(entry)
+    next.path = next.path.replace('@parcel/watcher-linux-x64-glibc', packageName)
+    if (next.role === 'node') {
+      next.path = os === 'win32' ? 'bin/node.exe' : 'bin/node'
+    }
+    return next
+  })
+  if (os === 'darwin') {
+    tuple.entries.push(
+      nativeEntry(
+        'node_modules/node-pty/build/Release/spawn-helper',
+        'native-runtime',
+        `${tupleId}:spawn-helper`
+      )
+    )
+  }
+  if (os === 'win32') {
+    tuple.entries = tuple.entries.filter((entry) => entry.role !== 'node-pty-native')
+    tuple.entries.push(
+      { path: 'node_modules/node-pty/build/Release/conpty', type: 'directory', mode: 0o755 },
+      nativeEntry(
+        'node_modules/node-pty/build/Release/conpty.node',
+        'node-pty-native',
+        `${tupleId}:conpty-node`
+      ),
+      nativeEntry(
+        'node_modules/node-pty/build/Release/conpty_console_list.node',
+        'node-pty-native',
+        `${tupleId}:console-list`
+      ),
+      nativeEntry(
+        'node_modules/node-pty/build/Release/conpty/OpenConsole.exe',
+        'native-runtime',
+        `${tupleId}:open-console`
+      ),
+      nativeEntry(
+        'node_modules/node-pty/build/Release/conpty/conpty.dll',
+        'native-runtime',
+        `${tupleId}:conpty-dll`
+      )
+    )
+  }
+  const nativeRoles = new Set([
+    'node',
+    'node-pty-native',
+    'parcel-watcher-native',
+    'native-runtime'
+  ])
+  tuple.nativeVerification = {
+    policy:
+      os === 'linux'
+        ? 'linux-hash-only-v1'
+        : os === 'darwin'
+          ? 'apple-developer-id-v1'
+          : 'signpath-authenticode-v1',
+    tool: { name: 'fixture-verifier', version: '1.0.0' },
+    verifiedAt: '2026-07-15T00:00:00.000Z',
+    files: tuple.entries
+      .filter((entry) => entry.type === 'file' && nativeRoles.has(entry.role))
+      .map(({ path, sha256 }) => ({ path, sha256 }))
+  }
+  const files = tuple.entries.filter((entry) => entry.type === 'file')
+  tuple.archive.fileCount = files.length
+  tuple.archive.expandedSize = files.reduce((total, entry) => total + entry.size, 0)
+  tuple.metadataAssets.sbom.name = `orca-ssh-relay-runtime-${tupleId}.spdx.json`
+  tuple.metadataAssets.provenance.name = `orca-ssh-relay-runtime-${tupleId}.provenance.json`
+  tuple.contentId = computeSshRelayRuntimeContentId(tuple)
+  const extension = os === 'win32' ? 'zip' : 'tar.xz'
+  tuple.archive.name = `orca-ssh-relay-runtime-v1-${tupleId}-${tuple.contentId.slice(7)}.${extension}`
+  return tuple
+}
+
+async function writeTupleArtifact(root, tupleId) {
+  const tuple = tupleFor(tupleId)
+  const archiveBytes = Buffer.from(`${tupleId}:archive`)
+  const sbomBytes = Buffer.from(`${JSON.stringify({ spdxVersion: 'SPDX-2.3', tupleId })}\n`)
+  const provenanceBytes = Buffer.from(`${JSON.stringify({ _type: 'in-toto', tupleId })}\n`)
+  tuple.archive.size = archiveBytes.length
+  tuple.archive.sha256 = digest(archiveBytes)
+  tuple.metadataAssets.sbom = fileReference(tuple.metadataAssets.sbom.name, sbomBytes)
+  tuple.metadataAssets.provenance = fileReference(
+    tuple.metadataAssets.provenance.name,
+    provenanceBytes
+  )
+  const descriptorBytes = Buffer.from(
+    `${JSON.stringify({ schemaVersion: 1, tuple }, null, 2)}\n`,
+    'utf8'
+  )
+  const input = {
+    tupleId,
+    descriptor: fileReference(
+      `orca-ssh-relay-runtime-${tupleId}.manifest-tuple.json`,
+      descriptorBytes
+    ),
+    archive: fileReference(tuple.archive.name, archiveBytes),
+    sbom: { ...tuple.metadataAssets.sbom },
+    provenance: { ...tuple.metadataAssets.provenance }
+  }
+  const artifactName = tupleId.startsWith('linux-')
+    ? `ssh-relay-runtime-${tupleId}`
+    : `ssh-relay-runtime-signed-${tupleId}`
+  const artifactRoot = join(root, artifactName)
+  const assetsRoot = tupleId.startsWith('linux-') ? artifactRoot : join(artifactRoot, 'assets')
+  const evidenceRoot = tupleId.startsWith('linux-') ? artifactRoot : join(artifactRoot, 'evidence')
+  await mkdir(assetsRoot, { recursive: true })
+  await mkdir(evidenceRoot, { recursive: true })
+  await Promise.all([
+    writeFile(join(assetsRoot, input.descriptor.name), descriptorBytes),
+    writeFile(join(assetsRoot, input.archive.name), archiveBytes),
+    writeFile(join(assetsRoot, input.sbom.name), sbomBytes),
+    writeFile(join(assetsRoot, input.provenance.name), provenanceBytes)
+  ])
+  const receipt = tupleId.startsWith('linux-')
+    ? { tupleId, contentId: tuple.contentId, verification: {}, aggregateInput: input }
+    : {
+        tupleId,
+        sourceContentId: tuple.contentId,
+        finalContentId: tuple.contentId,
+        returnedFiles: [],
+        nativeVerification: tuple.nativeVerification,
+        smoke: {},
+        metadata: {},
+        aggregateInput: input
+      }
+  const suffix = tupleId.startsWith('linux-') ? 'linux-finalization' : 'finalization'
+  await writeFile(join(evidenceRoot, `${tupleId}.${suffix}.json`), `${JSON.stringify(receipt)}\n`)
+  return { artifactRoot, assetsRoot, evidenceRoot, input, tuple }
+}
+
+async function fixture() {
+  const root = await mkdtemp(join(tmpdir(), 'orca-manifest-command-'))
+  temporaryDirectories.push(root)
+  const artifactsDirectory = join(root, 'artifacts')
+  await mkdir(artifactsDirectory)
+  const tuples = []
+  for (const tupleId of TUPLES) {
+    tuples.push(await writeTupleArtifact(artifactsDirectory, tupleId))
+  }
+  const acceptedKeysPath = join(root, 'accepted-keys.json')
+  const acceptedKeys = {
+    schemaVersion: 1,
+    keys: [
+      {
+        keyId: sshRelayRuntimeManifestKeyId(keyPair.publicKey),
+        publicKeyBase64: Buffer.from(keyPair.publicKey).toString('base64')
+      }
+    ]
+  }
+  await writeFile(acceptedKeysPath, `${JSON.stringify(acceptedKeys)}\n`)
+  return {
+    root,
+    artifactsDirectory,
+    acceptedKeysPath,
+    acceptedKeys,
+    tuples,
+    prepareOutput: join(root, 'prepared'),
+    finalOutput: join(root, 'final'),
+    sourceSha: 'a'.repeat(40),
+    releaseTag: 'v1.4.140-rc.1',
+    createdAt: '2026-07-15T01:02:03.000Z',
+    relayProtocolVersion: 1
+  }
+}
+
+function commandInput(value, outputDirectory = value.prepareOutput) {
+  return {
+    artifactsDirectory: value.artifactsDirectory,
+    acceptedKeysPath: value.acceptedKeysPath,
+    outputDirectory,
+    sourceSha: value.sourceSha,
+    releaseTag: value.releaseTag,
+    createdAt: value.createdAt,
+    relayProtocolVersion: value.relayProtocolVersion
+  }
+}
+
+afterEach(async () => {
+  await Promise.all(
+    temporaryDirectories
+      .splice(0)
+      .map((directory) => rm(directory, { recursive: true, force: true }))
+  )
+})
+
+describe('SSH relay runtime manifest aggregate filesystem command', () => {
+  it('independently recollects six receipt-bound artifacts around signature-only handoff', async () => {
+    const value = await fixture()
+    const prepared = await prepareSshRelayRuntimeManifestAggregateCommand(commandInput(value))
+    const requestArtifact = JSON.parse(
+      await readFile(join(value.prepareOutput, 'signing-request.json'), 'utf8')
+    )
+    expect(requestArtifact).toEqual(
+      encodeSshRelayRuntimeManifestSigningRequestArtifact(prepared.signingRequest)
+    )
+    const signingResult = signSshRelayRuntimeManifestRequest({
+      requestArtifact,
+      seedBase64: Buffer.from(keyPair.secretKey.subarray(0, 32)).toString('base64')
+    })
+    const signingResultPath = join(value.root, 'signing-result.json')
+    await writeFile(signingResultPath, `${JSON.stringify(signingResult)}\n`)
+    const finalized = await finalizeSshRelayRuntimeManifestAggregateCommand({
+      ...commandInput(value, value.finalOutput),
+      preparedDirectory: value.prepareOutput,
+      signingResultPath
+    })
+
+    expect(finalized.manifest.tuples.map((tuple) => tuple.tupleId)).toEqual(TUPLES.toSorted())
+    expect(
+      verifySshRelayArtifactManifest(finalized.manifest, [
+        { keyId: value.acceptedKeys.keys[0].keyId, publicKey: keyPair.publicKey }
+      ])
+    ).toEqual(finalized.manifest)
+    const finalEntries = (await lstat(value.finalOutput)).isDirectory()
+    expect(finalEntries).toBe(true)
+    await expect(lstat(join(value.finalOutput, 'aggregate-input'))).rejects.toMatchObject({
+      code: 'ENOENT'
+    })
+  })
+
+  it('rejects missing, extra, mutated, duplicate, and receipt-drifted artifact inputs', async () => {
+    const missing = await fixture()
+    await rm(missing.tuples[0].artifactRoot, { recursive: true })
+    await expect(
+      prepareSshRelayRuntimeManifestAggregateCommand(commandInput(missing))
+    ).rejects.toThrow(/missing|unexpected/i)
+
+    const extra = await fixture()
+    await mkdir(join(extra.artifactsDirectory, 'ssh-relay-runtime-extra'))
+    await expect(
+      prepareSshRelayRuntimeManifestAggregateCommand(commandInput(extra))
+    ).rejects.toThrow(/missing|unexpected/i)
+
+    const mutated = await fixture()
+    await writeFile(
+      join(mutated.tuples[1].assetsRoot, mutated.tuples[1].input.archive.name),
+      'drift'
+    )
+    await expect(
+      prepareSshRelayRuntimeManifestAggregateCommand(commandInput(mutated))
+    ).rejects.toThrow(/size|sha-?256|changed/i)
+
+    const receiptDrift = await fixture()
+    const receiptPath = join(receiptDrift.tuples[2].evidenceRoot, `${TUPLES[2]}.finalization.json`)
+    const document = JSON.parse(await readFile(receiptPath, 'utf8'))
+    document.tupleId = TUPLES[3]
+    await writeFile(receiptPath, `${JSON.stringify(document)}\n`)
+    await expect(
+      prepareSshRelayRuntimeManifestAggregateCommand(commandInput(receiptDrift))
+    ).rejects.toThrow(/receipt|tuple/i)
+
+    const duplicate = await fixture()
+    const duplicateReceiptPath = join(
+      duplicate.tuples[1].evidenceRoot,
+      `${TUPLES[1]}.linux-finalization.json`
+    )
+    const duplicateReceipt = JSON.parse(await readFile(duplicateReceiptPath, 'utf8'))
+    duplicateReceipt.aggregateInput.archive.name = duplicate.tuples[0].input.archive.name
+    await writeFile(duplicateReceiptPath, `${JSON.stringify(duplicateReceipt)}\n`)
+    await expect(
+      prepareSshRelayRuntimeManifestAggregateCommand(commandInput(duplicate))
+    ).rejects.toThrow(/duplicate/i)
+  })
+
+  it.skipIf(process.platform === 'win32')('rejects linked finalization receipts', async () => {
+    const linked = await fixture()
+    const receipt = join(linked.tuples[0].evidenceRoot, `${TUPLES[0]}.linux-finalization.json`)
+    const realReceipt = `${receipt}.real`
+    await writeFile(realReceipt, await readFile(receipt))
+    await rm(receipt)
+    await symlink(realReceipt, receipt)
+    await expect(
+      prepareSshRelayRuntimeManifestAggregateCommand(commandInput(linked))
+    ).rejects.toThrow(/regular|symbolic|link/i)
+  })
+
+  it('validates accepted keys before exposing a request and removes partial final output', async () => {
+    const invalidKeys = await fixture()
+    invalidKeys.acceptedKeys.keys[0].publicKeyBase64 = Buffer.alloc(31).toString('base64')
+    await writeFile(invalidKeys.acceptedKeysPath, JSON.stringify(invalidKeys.acceptedKeys))
+    await expect(
+      prepareSshRelayRuntimeManifestAggregateCommand(commandInput(invalidKeys))
+    ).rejects.toThrow(/public key|32 bytes|accepted key/i)
+    await expect(lstat(invalidKeys.prepareOutput)).rejects.toMatchObject({ code: 'ENOENT' })
+
+    const invalidSignature = await fixture()
+    await prepareSshRelayRuntimeManifestAggregateCommand(commandInput(invalidSignature))
+    const signingResultPath = join(invalidSignature.root, 'signing-result.json')
+    await writeFile(
+      signingResultPath,
+      JSON.stringify({
+        keyId: invalidSignature.acceptedKeys.keys[0].keyId,
+        signature: Buffer.alloc(64).toString('base64')
+      })
+    )
+    await expect(
+      finalizeSshRelayRuntimeManifestAggregateCommand({
+        ...commandInput(invalidSignature, invalidSignature.finalOutput),
+        preparedDirectory: invalidSignature.prepareOutput,
+        signingResultPath
+      })
+    ).rejects.toThrow(/signature/i)
+    await expect(lstat(invalidSignature.finalOutput)).rejects.toMatchObject({ code: 'ENOENT' })
+  })
+
+  it('rejects prepared handoff drift, cancellation, and incomplete CLI arguments', async () => {
+    const drifted = await fixture()
+    const prepared = await prepareSshRelayRuntimeManifestAggregateCommand(commandInput(drifted))
+    const requestArtifact = encodeSshRelayRuntimeManifestSigningRequestArtifact(
+      prepared.signingRequest
+    )
+    const signingResultPath = join(drifted.root, 'signing-result.json')
+    await writeFile(
+      signingResultPath,
+      JSON.stringify({
+        ...signSshRelayRuntimeManifestRequest({
+          requestArtifact,
+          seedBase64: Buffer.from(keyPair.secretKey.subarray(0, 32)).toString('base64')
+        })
+      })
+    )
+    const preparedPath = join(drifted.prepareOutput, 'prepared-aggregate.json')
+    const preparedDocument = JSON.parse(await readFile(preparedPath, 'utf8'))
+    preparedDocument.sourceSha = 'b'.repeat(40)
+    await writeFile(preparedPath, `${JSON.stringify(preparedDocument)}\n`)
+    await expect(
+      finalizeSshRelayRuntimeManifestAggregateCommand({
+        ...commandInput(drifted, drifted.finalOutput),
+        preparedDirectory: drifted.prepareOutput,
+        signingResultPath
+      })
+    ).rejects.toThrow(/prepared|drift/i)
+    await expect(lstat(drifted.finalOutput)).rejects.toMatchObject({ code: 'ENOENT' })
+
+    const cancelled = await fixture()
+    const controller = new AbortController()
+    controller.abort(new Error('cancel aggregate collection'))
+    await expect(
+      prepareSshRelayRuntimeManifestAggregateCommand({
+        ...commandInput(cancelled),
+        signal: controller.signal
+      })
+    ).rejects.toThrow(/cancel aggregate collection/i)
+    await expect(lstat(cancelled.prepareOutput)).rejects.toMatchObject({ code: 'ENOENT' })
+
+    expect(() => parseSshRelayRuntimeManifestAggregateCommandArguments(['prepare'])).toThrow(
+      /missing/i
+    )
+    expect(() =>
+      parseSshRelayRuntimeManifestAggregateCommandArguments(['finalize', '--unknown', 'value'])
+    ).toThrow(/invalid/i)
+  })
+})
diff --git a/config/scripts/ssh-relay-runtime-manifest-artifact-collection.mjs b/config/scripts/ssh-relay-runtime-manifest-artifact-collection.mjs
new file mode 100644
index 00000000000..23e120f1da3
--- /dev/null
+++ b/config/scripts/ssh-relay-runtime-manifest-artifact-collection.mjs
@@ -0,0 +1,236 @@
+import { constants } from 'node:fs'
+import { copyFile, lstat, readFile, readdir } from 'node:fs/promises'
+import { basename, join, resolve } from 'node:path'
+
+const MAX_RECEIPT_BYTES = 32 * 1024 * 1024
+const SAFE_NAME = /^[A-Za-z0-9][A-Za-z0-9._-]{0,239}$/u
+const DIGEST = /^sha256:[0-9a-f]{64}$/u
+const INPUT_FIELDS = ['archive', 'descriptor', 'provenance', 'sbom', 'tupleId']
+const FILE_FIELDS = ['name', 'sha256', 'size']
+
+export const SSH_RELAY_RUNTIME_MANIFEST_ARTIFACTS = Object.freeze([
+  {
+    tupleId: 'linux-x64-glibc',
+    artifactName: 'ssh-relay-runtime-linux-x64-glibc',
+    layout: 'flat'
+  },
+  {
+    tupleId: 'linux-arm64-glibc',
+    artifactName: 'ssh-relay-runtime-linux-arm64-glibc',
+    layout: 'flat'
+  },
+  {
+    tupleId: 'darwin-x64',
+    artifactName: 'ssh-relay-runtime-signed-darwin-x64',
+    layout: 'signed'
+  },
+  {
+    tupleId: 'darwin-arm64',
+    artifactName: 'ssh-relay-runtime-signed-darwin-arm64',
+    layout: 'signed'
+  },
+  {
+    tupleId: 'win32-x64',
+    artifactName: 'ssh-relay-runtime-signed-win32-x64',
+    layout: 'signed'
+  },
+  {
+    tupleId: 'win32-arm64',
+    artifactName: 'ssh-relay-runtime-signed-win32-arm64',
+    layout: 'signed'
+  }
+])
+
+function assertObject(value, label) {
+  if (value === null || typeof value !== 'object' || Array.isArray(value)) {
+    throw new Error(`SSH relay runtime manifest artifact ${label} must be an object`)
+  }
+}
+
+function assertExactFields(value, fields, label) {
+  assertObject(value, label)
+  const actual = Object.keys(value).sort()
+  const expected = [...fields].sort()
+  if (JSON.stringify(actual) !== JSON.stringify(expected)) {
+    throw new Error(`SSH relay runtime manifest artifact ${label} has invalid fields`)
+  }
+}
+
+function stableState(before, after) {
+  return (
+    before.dev === after.dev &&
+    before.ino === after.ino &&
+    before.size === after.size &&
+    before.mtimeNs === after.mtimeNs &&
+    before.ctimeNs === after.ctimeNs
+  )
+}
+
+async function realDirectory(path, label) {
+  const metadata = await lstat(path)
+  if (!metadata.isDirectory() || metadata.isSymbolicLink()) {
+    throw new Error(`SSH relay runtime manifest artifact ${label} must be a real directory`)
+  }
+  return resolve(path)
+}
+
+async function readStableJson(path, label, signal) {
+  signal?.throwIfAborted()
+  const before = await lstat(path, { bigint: true })
+  if (
+    !before.isFile() ||
+    before.isSymbolicLink() ||
+    before.size <= 0n ||
+    before.size > BigInt(MAX_RECEIPT_BYTES)
+  ) {
+    throw new Error(`SSH relay runtime manifest artifact ${label} must be bounded regular JSON`)
+  }
+  const bytes = await readFile(path, { signal })
+  const after = await lstat(path, { bigint: true })
+  if (!stableState(before, after)) {
+    throw new Error(`SSH relay runtime manifest artifact ${label} changed while reading`)
+  }
+  try {
+    return JSON.parse(bytes.toString('utf8'))
+  } catch (error) {
+    throw new Error(
+      `SSH relay runtime manifest artifact ${label} is invalid JSON: ${error.message}`
+    )
+  }
+}
+
+function normalizeFile(value, label) {
+  assertExactFields(value, FILE_FIELDS, label)
+  if (
+    typeof value.name !== 'string' ||
+    basename(value.name) !== value.name ||
+    !SAFE_NAME.test(value.name)
+  ) {
+    throw new Error(`SSH relay runtime manifest artifact ${label} has an unsafe name`)
+  }
+  if (!DIGEST.test(value.sha256)) {
+    throw new Error(`SSH relay runtime manifest artifact ${label} has an invalid SHA-256`)
+  }
+  if (!Number.isSafeInteger(value.size) || value.size <= 0) {
+    throw new Error(`SSH relay runtime manifest artifact ${label} has an invalid size`)
+  }
+  return { name: value.name, sha256: value.sha256, size: value.size }
+}
+
+function normalizeAggregateInput(value, expectedTupleId) {
+  assertExactFields(value, INPUT_FIELDS, `${expectedTupleId} aggregate input`)
+  if (value.tupleId !== expectedTupleId) {
+    throw new Error(`SSH relay runtime manifest artifact receipt tuple drifted: ${expectedTupleId}`)
+  }
+  return {
+    tupleId: expectedTupleId,
+    descriptor: normalizeFile(value.descriptor, `${expectedTupleId} descriptor`),
+    archive: normalizeFile(value.archive, `${expectedTupleId} archive`),
+    sbom: normalizeFile(value.sbom, `${expectedTupleId} SBOM`),
+    provenance: normalizeFile(value.provenance, `${expectedTupleId} provenance`)
+  }
+}
+
+function receiptBinding(receipt, artifact) {
+  assertObject(receipt, `${artifact.tupleId} finalization receipt`)
+  if (receipt.tupleId !== artifact.tupleId) {
+    throw new Error(
+      `SSH relay runtime manifest artifact receipt tuple drifted: ${artifact.tupleId}`
+    )
+  }
+  const contentId = artifact.layout === 'flat' ? receipt.contentId : receipt.finalContentId
+  if (!DIGEST.test(contentId ?? '')) {
+    throw new Error(
+      `SSH relay runtime manifest artifact receipt content drifted: ${artifact.tupleId}`
+    )
+  }
+  return {
+    tupleId: artifact.tupleId,
+    contentId,
+    aggregateInput: normalizeAggregateInput(receipt.aggregateInput, artifact.tupleId)
+  }
+}
+
+async function copyStableFile(source, destination, file, signal) {
+  signal?.throwIfAborted()
+  const before = await lstat(source, { bigint: true })
+  if (!before.isFile() || before.isSymbolicLink()) {
+    throw new Error(
+      `SSH relay runtime manifest artifact input is not the declared regular file: ${file.name}`
+    )
+  }
+  if (before.size !== BigInt(file.size)) {
+    throw new Error(`SSH relay runtime manifest artifact input size mismatch: ${file.name}`)
+  }
+  await copyFile(source, destination, constants.COPYFILE_EXCL)
+  const after = await lstat(source, { bigint: true })
+  if (!stableState(before, after)) {
+    throw new Error(`SSH relay runtime manifest artifact input changed while copying: ${file.name}`)
+  }
+}
+
+async function assertExactArtifactDirectories(root) {
+  const entries = await readdir(root, { withFileTypes: true })
+  const actual = entries.map((entry) => entry.name).sort()
+  const expected = SSH_RELAY_RUNTIME_MANIFEST_ARTIFACTS.map(
+    ({ artifactName }) => artifactName
+  ).sort()
+  if (JSON.stringify(actual) !== JSON.stringify(expected)) {
+    throw new Error(
+      'SSH relay runtime manifest artifact root has missing or unexpected directories'
+    )
+  }
+  for (const entry of entries) {
+    if (!entry.isDirectory() || entry.isSymbolicLink()) {
+      throw new Error(`SSH relay runtime manifest artifact is not a real directory: ${entry.name}`)
+    }
+  }
+}
+
+export async function collectSshRelayRuntimeManifestArtifacts({
+  artifactsDirectory,
+  stagingDirectory,
+  signal
+}) {
+  const root = await realDirectory(resolve(artifactsDirectory), 'root')
+  const staging = await realDirectory(resolve(stagingDirectory), 'staging directory')
+  await assertExactArtifactDirectories(root)
+  const names = new Set()
+  const bindings = []
+  for (const artifact of SSH_RELAY_RUNTIME_MANIFEST_ARTIFACTS) {
+    signal?.throwIfAborted()
+    const artifactRoot = await realDirectory(
+      join(root, artifact.artifactName),
+      artifact.artifactName
+    )
+    const assetsRoot =
+      artifact.layout === 'flat'
+        ? artifactRoot
+        : await realDirectory(join(artifactRoot, 'assets'), `${artifact.tupleId} assets`)
+    const evidenceRoot =
+      artifact.layout === 'flat'
+        ? artifactRoot
+        : await realDirectory(join(artifactRoot, 'evidence'), `${artifact.tupleId} evidence`)
+    const suffix = artifact.layout === 'flat' ? 'linux-finalization' : 'finalization'
+    const receipt = await readStableJson(
+      join(evidenceRoot, `${artifact.tupleId}.${suffix}.json`),
+      `${artifact.tupleId} receipt`,
+      signal
+    )
+    const binding = receiptBinding(receipt, artifact)
+    for (const file of [
+      binding.aggregateInput.descriptor,
+      binding.aggregateInput.archive,
+      binding.aggregateInput.sbom,
+      binding.aggregateInput.provenance
+    ]) {
+      if (names.has(file.name)) {
+        throw new Error(`SSH relay runtime manifest artifact has a duplicate file: ${file.name}`)
+      }
+      names.add(file.name)
+      await copyStableFile(join(assetsRoot, file.name), join(staging, file.name), file, signal)
+    }
+    bindings.push(binding)
+  }
+  return bindings
+}
diff --git a/docs/reference/plans/2026-07-14-ssh-relay-github-release-implementation-checklist-summary.md b/docs/reference/plans/2026-07-14-ssh-relay-github-release-implementation-checklist-summary.md
index 8d895aaeafc..6fb74adf9c0 100644
--- a/docs/reference/plans/2026-07-14-ssh-relay-github-release-implementation-checklist-summary.md
+++ b/docs/reference/plans/2026-07-14-ssh-relay-github-release-implementation-checklist-summary.md
@@ -242,8 +242,11 @@ complete a box.
       signing remains blocked and no release, desktop, publication, or tuple consumer is connected.
       The missing-workflow/seed-signer RED is
       `E-M4-PROTECTED-MANIFEST-WORKFLOW-LOCAL-RED-001`; the seed signer is locally green under
-      `E-M4-PROTECTED-MANIFEST-SEED-LOCAL-001`, while the filesystem aggregate command and workflow
-      remain open.
+      `E-M4-PROTECTED-MANIFEST-SEED-LOCAL-001` and all-six exact-head CI is closed by
+      `E-M4-PROTECTED-MANIFEST-SEED-CI-001`. The filesystem prepare/finalize command is locally
+      green under `E-M4-MANIFEST-AGGREGATE-COMMAND-LOCAL-RED-001` and
+      `E-M4-MANIFEST-AGGREGATE-COMMAND-LOCAL-001`; exact-head CI and the callable workflow remain
+      open.
 - [ ] Embed the exact signed manifest and accepted keys in each desktop build.
 - [ ] Upload to a draft release, read back, re-hash, and execute the downloaded archives.
 - [ ] Test timeouts, retries, approval denial, signing failure, partial output, and draft recovery.
diff --git a/docs/reference/plans/2026-07-14-ssh-relay-github-release-implementation-checklist.md b/docs/reference/plans/2026-07-14-ssh-relay-github-release-implementation-checklist.md
index 50e1eb39676..2986ee50794 100644
--- a/docs/reference/plans/2026-07-14-ssh-relay-github-release-implementation-checklist.md
+++ b/docs/reference/plans/2026-07-14-ssh-relay-github-release-implementation-checklist.md
@@ -9,7 +9,7 @@ work; keep exact commands, runner identities, hashes, metrics, and residual gaps
 Date created: 2026-07-14<br>
 Last updated: 2026-07-15<br>
 Current phase: Milestone 4 / Work Package 3 disconnected aggregate and protected manifest-signing workflow contract — **In progress — 2026-07-15, Codex implementation owner**. Linux aggregate-ready finalization is closed locally and on exact-head native x64/arm64 runners under E-M4-LINUX-FINALIZATION-LOCAL-RED-001, E-M4-LINUX-FINALIZATION-LOCAL-001, and E-M4-LINUX-FINALIZATION-CI-001. The active package must consume only the six exact aggregate-ready outputs, prepare canonical bytes credential-free, expose only those bytes to the tag-restricted `relay-runtime-manifest-signing` environment, accept only key ID plus Ed25519 signature, reconstruct and verify before final output, and fail closed on missing/extra/mutated inputs, approval/secret/signing failure, timeout, or partial output. It remains callable and disconnected. Release-cut, desktop builds, publication, and every tuple stay disconnected; production/default behavior is unchanged.<br>
-Session checkpoint: **In progress — 2026-07-15, Codex implementation owner** — exact-head run 29419759256 at `91f59d19e5251fb7b6c9f6d397cd9cd82b43cbdf` passes all six native builds, both Linux userland supplements, and Windows x64 baseline. Windows arm64 fails only the retained build-floor gate after successful runtime verification (hosted 26200 versus required 26100). Downloaded artifacts 8344803641 and 8344824674 contain the expected Linux x64/arm64 descriptors and finalization receipts, whose tuple/content/archive/metadata bindings and smoke/resource metrics were inspected under E-M4-LINUX-FINALIZATION-CI-001. Golden E2E and replacement PR Checks pass. The protected seed signer is now locally green under E-M4-PROTECTED-MANIFEST-WORKFLOW-LOCAL-RED-001 and E-M4-PROTECTED-MANIFEST-SEED-LOCAL-001: canonical request serialization, exact base64 32-byte seed validation, signature-only output, drift/symlink rejection, and exclusive failure cleanup pass, and both native contract families execute the tests. The callable workflow remains intentionally absent/red while the filesystem prepare/finalize command is implemented next. No signing credential, aggregate workflow, release consumer, publication path, desktop consumer, tuple enablement, or production/default change is connected. Legacy remains the production default, and merge to `main` remains prohibited.<br>
+Session checkpoint: **In progress — 2026-07-15, Codex implementation owner** — protected seed-signer exact-head CI is closed by E-M4-PROTECTED-MANIFEST-SEED-CI-001 at pushed head `4180e04ac4e732f082dc576af69364325a678d2b`: all six native build jobs, PR Checks, and Golden E2E pass, with the artifact workflow red only for the retained Windows arm64 build-floor mismatch. The exclusive six-artifact filesystem command is locally green under E-M4-MANIFEST-AGGREGATE-COMMAND-LOCAL-RED-001 and E-M4-MANIFEST-AGGREGATE-COMMAND-LOCAL-001. Exact-head CI for that command is the next checkpoint, after which the still-red callable workflow may be implemented. No signing credential, aggregate workflow, release consumer, publication path, desktop consumer, tuple enablement, or production/default change is connected. Legacy remains the production default, and merge to `main` remains prohibited.<br>
 Primary design: [SSH relay GitHub Release plan](./2026-07-14-ssh-relay-github-release-plan.html)<br>
 Motivating issues: [#8450](https://github.com/stablyai/orca/issues/8450), [#1693](https://github.com/stablyai/orca/issues/1693)
 
@@ -10776,6 +10776,96 @@ typecheck` passes in 1.88 seconds wall. Full `pnpm run lint` passes in 9.26 seco
   receipt/path/mutation/accepted-key/signature/partial-output failures, before adding the callable
   workflow.
 
+### E-M4-MANIFEST-AGGREGATE-COMMAND-LOCAL-RED-001 — Six-artifact filesystem command is absent
+
+- Date: 2026-07-15
+- Owner: Codex implementation owner
+- Source: uncommitted purpose-named test atop pushed head
+  `4180e04ac4e732f082dc576af69364325a678d2b`; draft PR #8741.
+- Runner/remote/network: local macOS 26.2 arm64, Node v26.0.0 and pnpm 10.24.0. Generated local
+  fixtures only; no Actions runner, GitHub Environment, seed, release, desktop consumer, SSH host,
+  publication, or enabled tuple.
+- Command: `pnpm exec vitest run --config config/vitest.config.ts --maxWorkers=1
+config/scripts/ssh-relay-runtime-manifest-aggregate-command.test.mjs`.
+- Result: expected FAIL, 1 suite / 0 tests collected in 225 ms. The only failure is module
+  resolution for absent `config/scripts/ssh-relay-runtime-manifest-aggregate-command.mjs`.
+- Oracle proved: there is no file-based boundary that collects only the exact two flattened Linux
+  and four signed native artifacts, binds finalization receipts and accepted public keys, exposes
+  canonical bytes without credentials, independently recollects after signature return, verifies
+  the signature, and removes partial output on failure. The test defines missing/extra directory,
+  symlink, mutation, receipt drift, invalid-key, invalid-signature, and cleanup failures.
+- Does not prove: implementation, real downloaded artifact inputs, Actions execution, protected
+  signing, publication, desktop embedding, SSH behavior, or an enabled tuple.
+- Follow-up: implement the command and make this suite green before adding the callable workflow.
+
+### E-M4-PROTECTED-MANIFEST-SEED-CI-001 — Seed signer passes all six native contract families
+
+- Date: 2026-07-15
+- Owner: Codex implementation owner
+- Source: exact pushed head `4180e04ac4e732f082dc576af69364325a678d2b`; draft PR #8741.
+- Workflow: [SSH Relay Runtime Artifacts run 29422587380](https://github.com/stablyai/orca/actions/runs/29422587380),
+  14:13:18Z–14:27:59Z. The workflow conclusion is the expected failure solely because Windows
+  arm64 hosted build 26200 does not equal the separately required build 26100 after successful
+  runtime execution.
+- Native jobs: Linux arm64 87376626186, Linux x64 87376626194, macOS x64 87376626222, Windows arm64
+  87376626264, macOS arm64 87376626297, and Windows x64 87376626317 all pass. Linux/macOS report 48
+  files / 251 tests; Windows reports 49 files / 246 passed and nine skipped of 255. The delta from
+  the prior package is the protected seed-signing purpose suite under Node 24.18.0 on every family.
+- Supplemental gates: Linux x64 87378044229, Linux arm64 87378044358, and Windows x64 87379238862
+  pass. Windows arm64 87379238661 fails only the retained 26200-versus-26100 floor assertion.
+- Adjacent regressions: [PR Checks 29422587487](https://github.com/stablyai/orca/actions/runs/29422587487)
+  job 87376597444 passes from 14:13:22Z–14:26:30Z. [Golden E2E 29422587419](https://github.com/stablyai/orca/actions/runs/29422587419)
+  passes macOS job 87376596910 and Linux job 87376596912.
+- Oracle proved: canonical request serialization and seed-signing failure contracts execute under
+  repository Node 24 on all target-native runner families without regressing builds, packaged
+  smoke, full PR checks, or Golden E2E.
+- Does not prove: a real protected environment/seed, approval, filesystem aggregate command CI,
+  callable aggregate workflow, native signing/trust, oldest Windows arm64/macOS/Linux kernel
+  floors, publication, desktop embedding, SSH behavior, or an enabled tuple.
+- Follow-up: checkpoint the locally green filesystem aggregate command and require it on the same
+  six native families before implementing the callable workflow.
+
+### E-M4-MANIFEST-AGGREGATE-COMMAND-LOCAL-001 — Six-artifact prepare/finalize boundary passes locally
+
+- Date: 2026-07-15
+- Owner: Codex implementation owner
+- Source: local implementation atop pushed head
+  `4180e04ac4e732f082dc576af69364325a678d2b`; draft PR #8741.
+- Runner/remote/network: local macOS 26.2 arm64, Node v26.0.0 and pnpm 10.24.0. Six generated
+  aggregate-ready fixture directories and an in-memory Ed25519 test seed only; no Actions runner,
+  GitHub Environment, production key, release, desktop consumer, SSH host, publication, or enabled
+  tuple.
+- Focused command: `pnpm exec vitest run --config config/vitest.config.ts --maxWorkers=1
+config/scripts/ssh-relay-runtime-manifest-aggregate-command.test.mjs` — PASS, 1 file / 4 tests in
+  409 ms Vitest. A final cross-platform split rerun passes 1 file / 5 tests in 504 ms, preserving
+  the symlink case on POSIX while leaving all other hostile cases active on Windows. The suite covers
+  exact six-directory enumeration, flattened Linux versus signed
+  `assets/` + `evidence/` layouts, stable exclusive copies, finalization receipts, content and
+  descriptor bindings, duplicate names/tuples, missing/extra directories, symlinks, mutation,
+  invalid accepted keys, prepared drift, cancellation, invalid signatures, and failure cleanup.
+- Broad release command: `rg --files config/scripts | rg
+'/ssh-relay.*[.]test[.]mjs$' | rg -v
+'ssh-relay-runtime-manifest-signing-workflow[.]test[.]mjs$' | xargs /usr/bin/time -l pnpm exec
+  vitest run --config config/vitest.config.ts --maxWorkers=1` — PASS, 50 files / 260 tests in 8.68
+  seconds Vitest / 9.56 seconds wall, 189,104,128-byte maximum RSS, 96,130,448-byte peak footprint,
+  zero swaps. The preceding unfiltered 51-file run passes all implemented suites and fails only the
+  recorded absent-workflow RED; its pre-split count was 50 files / 259 tests.
+- Desktop parity and static gates: manifest schema/signature/release-asset parity passes 3 files / 48
+  tests; `pnpm run typecheck`, `node --check`, focused oxlint/formatting, and full `pnpm run lint`
+  pass. Full lint reports all 41 reliability gates, the 355-entry max-lines ratchet, bundled-skill,
+  localization catalog/parity, and localization coverage green; 26 warnings remain only in
+  untouched existing files.
+- Oracle proved: accepted public keys are validated and hash-bound before a request is exposed. The
+  preparation phase copies and verifies only the four declared files from each exact finalization
+  receipt into exclusive staging. Finalization independently recollects all six inputs, compares
+  the complete prepared receipt/request, verifies the returned key/signature, emits the manifest
+  and evidence exclusively, and removes staging/partial output on every tested failure.
+- Does not prove: actual downloaded native artifact directories, Node 24/native CI, a real protected
+  signer/environment/approval, the callable workflow, native signing/trust, publication, desktop
+  embedding, SSH behavior, or an enabled tuple.
+- Follow-up: checkpoint and push this command, require it on all six exact-head native jobs, then
+  implement the still-red callable workflow without connecting release or product consumers.
+
 ## Accepted Gaps
 
 No product gap is accepted merely because it appears in this list. Each entry requires explicit
@@ -10834,16 +10924,14 @@ The project is not complete until every applicable item below is checked with ev
 
 ## Next Required Action
 
-Checkpoint the locally proven protected seed signer and require its contract on all six native test
-families. Then implement the exclusive filesystem prepare/finalize command that collects only the
-six exact aggregate-ready artifacts, binds receipts and accepted public keys, serializes canonical
-bytes without credentials, reconstructs after signature return, and removes partial output on every
-failure. Only after that command is green may the still-red callable workflow isolate the base64
-32-byte seed in the tag-restricted `relay-runtime-manifest-signing` environment. The environment,
-accepted production keys, and secret remain unprovisioned, so live signing evidence must stay
-BLOCKED. Keep Windows arm64 build 26100, macOS 13.5, Linux kernel 4.18, release-cut, desktop builds,
-publication, and every tuple separately gated. Do not merge to `main`; retain every
-production/default gate.
+Checkpoint the locally proven filesystem prepare/finalize command and require its purpose suite on
+all six exact-head native test families. After that CI evidence is green, implement the still-red
+callable workflow so only canonical request bytes and the base64 32-byte seed enter the
+tag-restricted `relay-runtime-manifest-signing` environment, while credential-free preparation and
+final reconstruction independently download the six exact artifacts. The environment, accepted
+production keys, and secret remain unprovisioned, so live signing evidence must stay BLOCKED. Keep
+Windows arm64 build 26100, macOS 13.5, Linux kernel 4.18, release-cut, desktop builds, publication,
+and every tuple separately gated. Do not merge to `main`; retain every production/default gate.
 
 Cross-family Layer B targets, the protected manifest-signing environment, oldest-baseline/native-
 trust cells, and the paired legacy performance baseline remain release/default-path blockers. No