diff --git a/src/main/foreign-sqlite-readers/foreign-sqlite-reader-client-worker-lifecycle.test.ts b/src/main/foreign-sqlite-readers/foreign-sqlite-reader-client-worker-lifecycle.test.ts
index 69cb7d18652..c2d6c856a47 100644
--- a/src/main/foreign-sqlite-readers/foreign-sqlite-reader-client-worker-lifecycle.test.ts
+++ b/src/main/foreign-sqlite-readers/foreign-sqlite-reader-client-worker-lifecycle.test.ts
@@ -90,6 +90,25 @@ describe('ForeignSqliteReaderClient worker lifecycle', () => {
         client.readOpenCodeBinderSessions('/synthetic/opencode.db', { ms: 0, id: '' }),
       failure: [],
       answer: [{ id: 'ses_a', directory: '/w', createdAtMs: 1, parentId: null }]
+    },
+    {
+      reader: 'openCodePromptFailure',
+      read: (client: ForeignSqliteReaderClient) =>
+        client.readOpenCodePromptFailure({
+          dbPath: '/synthetic/opencode.db',
+          sessionId: 'ses-a',
+          startedAt: 100,
+          failedAt: 200
+        }),
+      failure: { failure: null },
+      answer: {
+        failure: {
+          inputId: 'input',
+          type: 'provider.quota',
+          message: 'Quota exhausted',
+          status: 429
+        }
+      }
     }
   ])(
     '$reader refuses new native workers until the retired worker positively terminates',
diff --git a/src/main/foreign-sqlite-readers/foreign-sqlite-reader-client.test.ts b/src/main/foreign-sqlite-readers/foreign-sqlite-reader-client.test.ts
index 318fc2b8c69..668fdf20282 100644
--- a/src/main/foreign-sqlite-readers/foreign-sqlite-reader-client.test.ts
+++ b/src/main/foreign-sqlite-readers/foreign-sqlite-reader-client.test.ts
@@ -70,6 +70,52 @@ function settle(): Promise<void> {
 }
 
 describe('ForeignSqliteReaderClient', () => {
+  it('includes queue time in the native failure deadline and removes expired work', async () => {
+    vi.useFakeTimers()
+    const workers: FakeWorker[] = []
+    const client = new ForeignSqliteReaderClient({ workerFactory: fakeFactory(workers), log() {} })
+    try {
+      const query = { dbPath: '/a/opencode.db', sessionId: 'a', startedAt: 100, failedAt: 200 }
+      const first = client.readOpenCodePromptFailure(query)
+      const second = client.readOpenCodePromptFailure({ ...query, sessionId: 'b' })
+      let queued: unknown
+      void second.then((value) => {
+        queued = value
+      })
+      await vi.advanceTimersByTimeAsync(1_999)
+      workers[0]?.reply({ failure: null })
+      await first
+      await vi.advanceTimersByTimeAsync(1)
+      expect(queued).toEqual({ failure: null })
+      expect(workers[0]?.terminated).toBe(true)
+    } finally {
+      client.dispose()
+      vi.useRealTimers()
+    }
+  })
+
+  it('does not share native prompt evidence across different turns in the same session', async () => {
+    const workers: FakeWorker[] = []
+    const client = new ForeignSqliteReaderClient({ workerFactory: fakeFactory(workers), log() {} })
+    const query = { dbPath: '/a/opencode.db', sessionId: 'ses-own', startedAt: 100, failedAt: 200 }
+    const first = client.readOpenCodePromptFailure(query)
+    expect(client.readOpenCodePromptFailure(query)).toBe(first)
+    const next = client.readOpenCodePromptFailure({ ...query, startedAt: 300, failedAt: 400 })
+    const quota = {
+      failure: { inputId: 'input', type: 'provider.quota', message: 'Quota exhausted', status: 429 }
+    }
+    workers[0]?.reply(quota)
+    await expect(first).resolves.toEqual(quota)
+    await settle()
+    workers[0]?.reply({ failure: null })
+    await expect(next).resolves.toEqual({ failure: null })
+    expect(workers[0]?.posted.map((request) => request.kind)).toEqual([
+      'openCodePromptFailure',
+      'openCodePromptFailure'
+    ])
+    client.dispose()
+  })
+
   it('returns the reader result the worker posts', async () => {
     const workers: FakeWorker[] = []
     const client = new ForeignSqliteReaderClient({ workerFactory: fakeFactory(workers), log() {} })
diff --git a/src/main/foreign-sqlite-readers/foreign-sqlite-reader-client.ts b/src/main/foreign-sqlite-readers/foreign-sqlite-reader-client.ts
index ad25bd300cd..223c474b1c7 100644
--- a/src/main/foreign-sqlite-readers/foreign-sqlite-reader-client.ts
+++ b/src/main/foreign-sqlite-readers/foreign-sqlite-reader-client.ts
@@ -16,19 +16,27 @@ import type {
   ForeignSqliteReaderRequest,
   ForeignSqliteReaderResponse
 } from './foreign-sqlite-reader-protocol'
+import {
+  openCodePromptFailureUnavailable,
+  parseOpenCodePromptFailureResult,
+  type OpenCodePromptFailureQuery,
+  type OpenCodePromptFailureResult
+} from './opencode-prompt-failure-result'
 
 // Foreign SQLite opens can block on WAL rebuilds; isolate each reader so slow databases cannot stall main or peers.
 
 const READ_TIMEOUT_MS: Record<ForeignSqliteReaderKind, number> = {
   // Allow margin beyond observed 4–6s WAL-index rebuilds.
   cursorProfile: 10_000,
-  openCodeBinderSessions: 60_000
+  openCodeBinderSessions: 60_000,
+  openCodePromptFailure: 2_000
 }
 // Keep workers alive across poll intervals to avoid spawning on every round.
 const DEFAULT_IDLE_TEARDOWN_MS: Record<ForeignSqliteReaderKind, number> = {
   cursorProfile: 30_000,
   // The binder polls once per minute.
-  openCodeBinderSessions: 120_000
+  openCodeBinderSessions: 120_000,
+  openCodePromptFailure: 30_000
 }
 const MAX_CONSECUTIVE_DEATHS = 2
 const MAX_QUEUED_READS = 8
@@ -38,6 +46,7 @@ type LaneSettings = {
   log: (message: string) => void
   timeoutMs: number
   idleTeardownMs: number
+  deadlineIncludesQueue?: boolean
 }
 
 export class ForeignSqliteReaderLane<T> {
@@ -93,8 +102,11 @@ export class ForeignSqliteReaderLane<T> {
 
   private async dispatch(buildRequest: (id: number) => ForeignSqliteReaderRequest): Promise<T> {
     const { kind, settings } = this
+    const deadline = settings.deadlineIncludesQueue ? new AbortController() : undefined
+    const timer = deadline ? setTimeout(() => deadline.abort(), settings.timeoutMs) : undefined
+    timer?.unref()
     try {
-      const response = await this.queue.dispatch(buildRequest, settings.timeoutMs)
+      const response = await this.queue.dispatch(buildRequest, settings.timeoutMs, deadline?.signal)
       if (!response.ok) {
         settings.log(`Foreign SQLite reader ${kind} failed: ${response.error}`)
         return this.failure()
@@ -109,6 +121,8 @@ export class ForeignSqliteReaderLane<T> {
       // A failed worker read must never fall back to blocking the main thread.
       settings.log(`Foreign SQLite reader ${kind} did not answer: ${errorText(err)}`)
       return this.failure()
+    } finally {
+      clearTimeout(timer)
     }
   }
 }
@@ -116,6 +130,7 @@ export class ForeignSqliteReaderLane<T> {
 export class ForeignSqliteReaderClient {
   private readonly cursorProfile: ForeignSqliteReaderLane<CursorDesktopProfileReadResult>
   private readonly openCodeBinderSessions: ForeignSqliteReaderLane<BinderSessionRow[]>
+  private readonly openCodePromptFailure: ForeignSqliteReaderLane<OpenCodePromptFailureResult>
 
   constructor(options: {
     workerFactory: WorkerThreadFactory
@@ -141,6 +156,12 @@ export class ForeignSqliteReaderClient {
       openCodeBinderSessionsFailure,
       settings('openCodeBinderSessions')
     )
+    this.openCodePromptFailure = new ForeignSqliteReaderLane(
+      'openCodePromptFailure',
+      parseOpenCodePromptFailureResult,
+      openCodePromptFailureUnavailable,
+      { ...settings('openCodePromptFailure'), deadlineIncludesQueue: true }
+    )
   }
 
   readCursorProfile(dbPath: string): Promise<CursorDesktopProfileReadResult> {
@@ -165,6 +186,18 @@ export class ForeignSqliteReaderClient {
   dispose(): void {
     this.cursorProfile.dispose()
     this.openCodeBinderSessions.dispose()
+    this.openCodePromptFailure.dispose()
+  }
+
+  readOpenCodePromptFailure(
+    query: OpenCodePromptFailureQuery
+  ): Promise<OpenCodePromptFailureResult> {
+    const key = JSON.stringify([query.dbPath, query.sessionId, query.startedAt, query.failedAt])
+    return this.openCodePromptFailure.read(key, (id) => ({
+      id,
+      kind: 'openCodePromptFailure',
+      ...query
+    }))
   }
 }
 
diff --git a/src/main/foreign-sqlite-readers/foreign-sqlite-reader-dispatch.ts b/src/main/foreign-sqlite-readers/foreign-sqlite-reader-dispatch.ts
index 3e7bd6abb55..a43d340b048 100644
--- a/src/main/foreign-sqlite-readers/foreign-sqlite-reader-dispatch.ts
+++ b/src/main/foreign-sqlite-readers/foreign-sqlite-reader-dispatch.ts
@@ -4,6 +4,7 @@ import type {
 } from './foreign-sqlite-reader-protocol'
 import { readCursorProfile } from './readers/cursor-profile'
 import { readOpenCodeBinderSessions } from './readers/opencode-binder-sessions'
+import { readOpenCodePromptFailure } from './readers/opencode-prompt-failure'
 
 /** Structured-clone requests may carry unknown kinds despite the static type. */
 export function handleForeignSqliteReaderRequest(
@@ -17,6 +18,8 @@ export function handleForeignSqliteReaderRequest(
         return { id, ok: true, value: readCursorProfile(request.dbPath) }
       case 'openCodeBinderSessions':
         return { id, ok: true, value: readOpenCodeBinderSessions(request.dbPath, request.cursor) }
+      case 'openCodePromptFailure':
+        return { id, ok: true, value: readOpenCodePromptFailure(request) }
     }
     return unknownKind(id, kind)
   } catch (err) {
diff --git a/src/main/foreign-sqlite-readers/foreign-sqlite-reader-protocol.ts b/src/main/foreign-sqlite-readers/foreign-sqlite-reader-protocol.ts
index f74d029858a..9d5ff579887 100644
--- a/src/main/foreign-sqlite-readers/foreign-sqlite-reader-protocol.ts
+++ b/src/main/foreign-sqlite-readers/foreign-sqlite-reader-protocol.ts
@@ -1,6 +1,7 @@
 // Keep this Electron-free so both worker and main-process clients can import it.
 
 import type { OpenCodeSessionCursor } from './opencode-binder-sessions-result'
+import type { OpenCodePromptFailureQuery } from './opencode-prompt-failure-result'
 
 type CursorProfileRequest = {
   id: number
@@ -15,7 +16,15 @@ type OpenCodeBinderSessionsRequest = {
   cursor: OpenCodeSessionCursor
 }
 
-export type ForeignSqliteReaderRequest = CursorProfileRequest | OpenCodeBinderSessionsRequest
+type OpenCodePromptFailureRequest = OpenCodePromptFailureQuery & {
+  id: number
+  kind: 'openCodePromptFailure'
+}
+
+export type ForeignSqliteReaderRequest =
+  | CursorProfileRequest
+  | OpenCodeBinderSessionsRequest
+  | OpenCodePromptFailureRequest
 
 export type ForeignSqliteReaderKind = ForeignSqliteReaderRequest['kind']
 
diff --git a/src/main/foreign-sqlite-readers/foreign-sqlite-reader-spawn.ts b/src/main/foreign-sqlite-readers/foreign-sqlite-reader-spawn.ts
index 5ee4184205a..7ad4dd43427 100644
--- a/src/main/foreign-sqlite-readers/foreign-sqlite-reader-spawn.ts
+++ b/src/main/foreign-sqlite-readers/foreign-sqlite-reader-spawn.ts
@@ -6,6 +6,10 @@ import type { CursorDesktopProfileReadResult } from './cursor-profile-result'
 import { ForeignSqliteReaderClient } from './foreign-sqlite-reader-client'
 import { resolveForeignSqliteReaderEntryPath } from './foreign-sqlite-reader-entry-path'
 import type { BinderSessionRow, OpenCodeSessionCursor } from './opencode-binder-sessions-result'
+import type {
+  OpenCodePromptFailureQuery,
+  OpenCodePromptFailureResult
+} from './opencode-prompt-failure-result'
 
 function defaultWorkerFactory(): Worker {
   const workerPath = resolveForeignSqliteReaderEntryPath(currentWorkerEntryLayout(__dirname))
@@ -26,6 +30,12 @@ export function readCursorDesktopProfile(dbPath: string): Promise<CursorDesktopP
   return getSharedClient().readCursorProfile(dbPath)
 }
 
+export function readOpenCodePromptFailure(
+  query: OpenCodePromptFailureQuery
+): Promise<OpenCodePromptFailureResult> {
+  return getSharedClient().readOpenCodePromptFailure(query)
+}
+
 /** Return oldest-first rows after cursor; unreadable or unavailable readers answer []. */
 export async function readOpenCodeBinderSessions(
   dbPath: string,
diff --git a/src/main/foreign-sqlite-readers/opencode-prompt-failure-result.ts b/src/main/foreign-sqlite-readers/opencode-prompt-failure-result.ts
new file mode 100644
index 00000000000..b9ed2441f48
--- /dev/null
+++ b/src/main/foreign-sqlite-readers/opencode-prompt-failure-result.ts
@@ -0,0 +1,32 @@
+import { z } from 'zod'
+
+export type OpenCodePromptFailureQuery = {
+  dbPath: string
+  sessionId: string
+  startedAt: number
+  failedAt: number
+}
+
+export const openCodePromptFailureSchema = z.object({
+  inputId: z.string().min(1).max(256),
+  type: z.string().min(1).max(128),
+  message: z.string().min(1).max(4096),
+  status: z.number().int().min(100).max(599).optional(),
+  resetsAt: z.number().int().positive().optional(),
+  responseType: z.string().max(128).optional(),
+  responseMessage: z.string().max(4096).optional()
+})
+
+export type OpenCodePromptFailure = z.infer<typeof openCodePromptFailureSchema>
+export type OpenCodePromptFailureResult = { failure: OpenCodePromptFailure | null }
+
+export function parseOpenCodePromptFailureResult(
+  value: unknown
+): OpenCodePromptFailureResult | null {
+  const parsed = z.object({ failure: openCodePromptFailureSchema.nullable() }).safeParse(value)
+  return parsed.success ? parsed.data : null
+}
+
+export function openCodePromptFailureUnavailable(): OpenCodePromptFailureResult {
+  return { failure: null }
+}
diff --git a/src/main/foreign-sqlite-readers/readers/opencode-prompt-failure.test.ts b/src/main/foreign-sqlite-readers/readers/opencode-prompt-failure.test.ts
new file mode 100644
index 00000000000..8c7b0985537
--- /dev/null
+++ b/src/main/foreign-sqlite-readers/readers/opencode-prompt-failure.test.ts
@@ -0,0 +1,141 @@
+import { mkdtempSync, rmSync } from 'node:fs'
+import { tmpdir } from 'node:os'
+import { join } from 'node:path'
+import { afterEach, beforeEach, describe, expect, it } from 'vitest'
+import SyncDatabase from '../../sqlite/sync-database'
+import { readOpenCodePromptFailure } from './opencode-prompt-failure'
+
+let directory: string
+let db: SyncDatabase
+let dbPath: string
+
+beforeEach(() => {
+  directory = mkdtempSync(join(tmpdir(), 'orca-opencode-failure-'))
+  dbPath = join(directory, 'opencode.db')
+  db = new SyncDatabase(dbPath)
+  db.exec(`CREATE TABLE session_message (
+    id TEXT PRIMARY KEY, session_id TEXT, type TEXT, seq INTEGER, time_created INTEGER, data TEXT
+  ); CREATE INDEX session_message_session_seq ON session_message(session_id, seq);`)
+  db.prepare('INSERT INTO session_message VALUES (?, ?, ?, ?, ?, ?)').run(
+    'input',
+    'ses-own',
+    'user',
+    0,
+    100,
+    '{}'
+  )
+})
+
+afterEach(() => {
+  db.close()
+  rmSync(directory, { recursive: true, force: true })
+})
+
+function message(seq: number, error: unknown, options: { session?: string; at?: number } = {}) {
+  db.prepare('INSERT INTO session_message VALUES (?, ?, ?, ?, ?, ?)').run(
+    `msg-${seq}`,
+    options.session ?? 'ses-own',
+    'idle',
+    seq,
+    options.at ?? 150,
+    JSON.stringify({ error })
+  )
+}
+
+const quota = { type: 'provider.quota', message: 'Free usage limit reached.', status: 429 }
+const query = { sessionId: 'ses-own', startedAt: 100, failedAt: 200 }
+
+describe('OpenCode native prompt failure', () => {
+  it('recovers the native type and HTTP status from the completed turn', () => {
+    message(1, quota)
+    expect(readOpenCodePromptFailure({ dbPath, ...query })).toEqual({
+      failure: { ...quota, inputId: 'input' }
+    })
+    expect(db.prepare('SELECT COUNT(*) AS count FROM session_message').get()).toEqual({ count: 2 })
+  })
+
+  it('does not reuse an outcome when a newer input arrives in the same millisecond', () => {
+    message(1, quota, { at: 100 })
+    db.prepare('INSERT INTO session_message VALUES (?, ?, ?, ?, ?, ?)').run(
+      'next-input',
+      'ses-own',
+      'user',
+      2,
+      100,
+      '{}'
+    )
+    expect(readOpenCodePromptFailure({ dbPath, ...query })).toEqual({ failure: null })
+  })
+
+  it('requires an input from this prompt even when an older execution fails during its window', () => {
+    db.prepare('UPDATE session_message SET time_created = 99 WHERE id = ?').run('input')
+    message(1, quota)
+    expect(readOpenCodePromptFailure({ dbPath, ...query })).toEqual({ failure: null })
+  })
+
+  it('ignores other sessions and failures before or after this prompt', () => {
+    message(1, quota, { at: 99 })
+    message(2, quota, { at: 201 })
+    message(3, quota, { session: 'ses-other' })
+    expect(readOpenCodePromptFailure({ dbPath, ...query })).toEqual({ failure: null })
+  })
+
+  it('does not reuse a failed step after a newer successful outcome', () => {
+    message(1, quota)
+    message(2, undefined)
+    expect(readOpenCodePromptFailure({ dbPath, ...query })).toEqual({ failure: null })
+  })
+
+  it('keeps retry timing anchored to the native failure rather than the eventual read', () => {
+    message(1, {
+      type: 'provider.rate-limit',
+      message: 'Slow down',
+      status: 429,
+      retryAfterMs: 60_000
+    })
+    expect(readOpenCodePromptFailure({ dbPath, ...query }).failure).toMatchObject({
+      resetsAt: 60_150
+    })
+  })
+
+  it.each([-1, 'invalid', 1e99])(
+    'ignores malformed retry timing without losing the failure: %j',
+    (retryAfterMs) => {
+      message(1, { ...quota, retryAfterMs })
+      expect(readOpenCodePromptFailure({ dbPath, ...query })).toEqual({
+        failure: { ...quota, inputId: 'input' }
+      })
+    }
+  )
+
+  it('preserves a typed gateway refusal hidden behind native authentication classification', () => {
+    message(1, {
+      type: 'provider.auth',
+      message: 'Provider authentication required',
+      status: 403,
+      response: {
+        body: JSON.stringify({ error: { type: 'RegionError', message: 'Region blocked' } })
+      }
+    })
+    expect(readOpenCodePromptFailure({ dbPath, ...query }).failure).toMatchObject({
+      status: 403,
+      responseType: 'RegionError',
+      responseMessage: 'Region blocked'
+    })
+  })
+
+  it('bounds provider response bodies without losing the native failure', () => {
+    message(1, { ...quota, response: { body: 'x'.repeat(100_000) } })
+    expect(readOpenCodePromptFailure({ dbPath, ...query })).toEqual({
+      failure: { ...quota, inputId: 'input' }
+    })
+  })
+
+  it('leaves unknown schemas and malformed latest messages unresolved', () => {
+    message(1, quota)
+    db.prepare('UPDATE session_message SET data = ?').run('{broken')
+    expect(readOpenCodePromptFailure({ dbPath, ...query })).toEqual({ failure: null })
+    db.exec('DROP TABLE session_message')
+    expect(readOpenCodePromptFailure({ dbPath, ...query })).toEqual({ failure: null })
+  })
+})
diff --git a/src/main/foreign-sqlite-readers/readers/opencode-prompt-failure.ts b/src/main/foreign-sqlite-readers/readers/opencode-prompt-failure.ts
new file mode 100644
index 00000000000..527b3048897
--- /dev/null
+++ b/src/main/foreign-sqlite-readers/readers/opencode-prompt-failure.ts
@@ -0,0 +1,104 @@
+import { z } from 'zod'
+import { usageLimitResetsAt } from '../../../shared/agent-session-usage-limit'
+import { readOpenCodeDatabase } from '../../ai-vault/session-scanner-opencode-sqlite-open'
+import { columnExists, tableExists } from '../../opencode-usage/schema-helpers'
+import {
+  openCodePromptFailureSchema,
+  type OpenCodePromptFailureQuery,
+  type OpenCodePromptFailureResult
+} from '../opencode-prompt-failure-result'
+
+const rowSchema = z.object({
+  inputId: z.string(),
+  type: z.string(),
+  message: z.string(),
+  status: z.number().nullable(),
+  createdAt: z.number().int(),
+  retryAfterMs: z.number().int().nonnegative().nullable().catch(null),
+  response: z.string().nullable()
+})
+const responseSchema = z.object({
+  error: z.object({ type: z.string().max(128), message: z.string().max(4096).optional() })
+})
+
+export function readOpenCodePromptFailure(
+  query: OpenCodePromptFailureQuery
+): OpenCodePromptFailureResult {
+  return readOpenCodeDatabase({
+    dbPath: query.dbPath,
+    read: (db) => {
+      const table = 'session_message'
+      if (
+        !tableExists(db, table) ||
+        !['id', 'session_id', 'seq', 'type', 'data', 'time_created'].every((column) =>
+          columnExists(db, table, column)
+        )
+      ) {
+        return { failure: null }
+      }
+      // Require fresh input before the latest outcome; never borrow an earlier turn's failure.
+      const row: unknown = db
+        .prepare(
+          `WITH input AS (
+            SELECT id AS inputId, seq AS input_seq, time_created AS input_created FROM session_message
+            WHERE session_id = ? AND type = 'user' ORDER BY seq DESC LIMIT 1
+          ), outcome AS (
+            SELECT seq, data, time_created FROM session_message
+            WHERE session_id = ? AND type IN ('assistant', 'idle')
+            ORDER BY seq DESC LIMIT 1
+          ) SELECT
+            inputId,
+            CASE WHEN json_valid(data) THEN substr(json_extract(data, '$.error.type'), 1, 128) END AS type,
+            CASE WHEN json_valid(data) THEN substr(json_extract(data, '$.error.message'), 1, 4096) END AS message,
+            CASE WHEN json_valid(data) THEN json_extract(data, '$.error.status') END AS status,
+            time_created AS createdAt,
+            CASE WHEN json_valid(data) THEN json_extract(data, '$.error.retryAfterMs') END AS retryAfterMs,
+            CASE WHEN json_valid(data) THEN substr(json_extract(data, '$.error.response.body'), 1, 16384) END AS response
+          FROM outcome, input
+          WHERE input_seq < seq AND input_created >= ? AND input_created <= ?
+            AND time_created >= ? AND time_created <= ?`
+        )
+        .get(
+          query.sessionId,
+          query.sessionId,
+          query.startedAt,
+          query.failedAt,
+          query.startedAt,
+          query.failedAt
+        )
+      const parsed = rowSchema.safeParse(row)
+      if (!parsed.success) {
+        return { failure: null }
+      }
+      let response: z.infer<typeof responseSchema> | undefined
+      if (parsed.data.response) {
+        try {
+          const decoded = responseSchema.safeParse(JSON.parse(parsed.data.response))
+          if (decoded.success) {
+            response = decoded.data
+          }
+        } catch {
+          // An invalid response body does not invalidate the native error itself.
+        }
+      }
+      const failure = openCodePromptFailureSchema.safeParse({
+        inputId: parsed.data.inputId,
+        type: parsed.data.type,
+        message: parsed.data.message,
+        ...(parsed.data.status === null ? {} : { status: parsed.data.status }),
+        ...(parsed.data.retryAfterMs === null
+          ? {}
+          : {
+              resetsAt: usageLimitResetsAt(
+                parsed.data.createdAt + parsed.data.retryAfterMs,
+                query.failedAt
+              )
+            }),
+        ...(response
+          ? { responseType: response.error.type, responseMessage: response.error.message }
+          : {})
+      })
+      return { failure: failure.success ? failure.data : null }
+    }
+  })
+}
diff --git a/src/main/opencode/opencode-acp-connection.test.ts b/src/main/opencode/opencode-acp-connection.test.ts
new file mode 100644
index 00000000000..7f62cca6de7
--- /dev/null
+++ b/src/main/opencode/opencode-acp-connection.test.ts
@@ -0,0 +1,351 @@
+import { mkdirSync, mkdtempSync, rmSync } from 'node:fs'
+import { tmpdir } from 'node:os'
+import { join } from 'node:path'
+import { PassThrough } from 'node:stream'
+import { afterEach, describe, expect, it, vi } from 'vitest'
+import { createFakePipedChild } from '../../shared/__fixtures__/fake-spawned-child'
+import { AcpScriptedAgent, deferred } from '../acp/acp-scripted-agent.test-support'
+import { AcpAgentError, AcpAuthRequiredError } from '../acp/acp-errors'
+import { AcpTimelineTranslator } from '../acp/acp-timeline-translator'
+import { acpLaunchSpecFor } from '../acp/acp-launch-specs'
+import { openAcpAdapterRig, sendHello } from '../acp/acp-structured-adapter.test-support'
+import {
+  closeProviderTimelineRigs,
+  SESSION
+} from '../native-chat/agent-session-timeline/provider-timeline-assembler-test-support'
+import { OPENCODE_ACP_DIALECT } from '../acp/acp-dialects/opencode-dialect'
+import { readOpenCodePromptFailure } from '../foreign-sqlite-readers/readers/opencode-prompt-failure'
+import type { OpenCodePromptFailureQuery } from '../foreign-sqlite-readers/opencode-prompt-failure-result'
+import SyncDatabase from '../sqlite/sync-database'
+import { createOpenCodeAcpConnection } from './opencode-acp-connection'
+
+const cleanups: (() => Promise<void>)[] = []
+afterEach(async () => {
+  for (const cleanup of cleanups.splice(0)) {
+    await cleanup()
+  }
+  vi.unstubAllEnvs()
+  await closeProviderTimelineRigs()
+})
+
+async function fixture(
+  native: unknown,
+  options: {
+    stale?: boolean
+    unavailable?: boolean
+    readGate?: Promise<void>
+    readStarted?: () => void
+    acpCode?: number
+  } = {}
+) {
+  const directory = mkdtempSync(join(tmpdir(), 'orca-opencode-acp-failure-'))
+  const dataHome = join(directory, 'account-data')
+  mkdirSync(join(dataHome, 'opencode'), { recursive: true })
+  const dbPath = join(dataHome, 'opencode', 'opencode.db')
+  const db = new SyncDatabase(dbPath)
+  db.exec(`CREATE TABLE session_message (
+    id TEXT PRIMARY KEY, session_id TEXT, type TEXT, seq INTEGER, time_created INTEGER, data TEXT
+  )`)
+  const agent = new AcpScriptedAgent()
+  const child = Object.assign(createFakePipedChild(), {
+    pid: 9_999_999,
+    stdout: agent.stdout,
+    stdin: agent.stdin,
+    stderr: new PassThrough()
+  })
+  agent.on('initialize', (frame) => agent.reply(frame, { protocolVersion: 1 }))
+  agent.on('session/new', (frame) => agent.reply(frame, { sessionId: 'ses-own' }))
+  let turn = 0
+  agent.on('session/prompt', (frame) => {
+    turn++
+    db.prepare('INSERT OR REPLACE INTO session_message VALUES (?, ?, ?, ?, ?, ?)').run(
+      `input-${turn}`,
+      'ses-own',
+      'user',
+      turn * 10,
+      Date.now(),
+      '{}'
+    )
+    db.prepare('INSERT OR REPLACE INTO session_message VALUES (?, ?, ?, ?, ?, ?)').run(
+      `outcome-${turn}`,
+      'ses-own',
+      'idle',
+      turn * 10 + 1,
+      options.stale ? 1 : Date.now(),
+      JSON.stringify({ error: native })
+    )
+    agent.fail(
+      frame,
+      options.acpCode ?? -32000,
+      'Authentication required: provider authentication required',
+      {
+        details: 'provider authentication required'
+      }
+    )
+  })
+  const readFailure = vi.fn(async (query: OpenCodePromptFailureQuery) => {
+    if (options.unavailable) {
+      throw new Error('database unavailable')
+    }
+    const result = readOpenCodePromptFailure(query)
+    options.readStarted?.()
+    await options.readGate
+    return result
+  })
+  const connection = createOpenCodeAcpConnection(
+    {
+      command: 'opencode2',
+      args: ['acp'],
+      cwd: directory,
+      env: { XDG_DATA_HOME: dataHome },
+      envToDelete: ['OPENCODE_DB']
+    },
+    {},
+    () => child,
+    readFailure
+  )
+  cleanups.push(async () => {
+    child.emit('exit', 0, null)
+    await connection.close()
+    db.close()
+    rmSync(directory, { recursive: true, force: true })
+  })
+  await connection.start({ cwd: directory, mcpServers: [] })
+  return { connection, readFailure, dbPath, agent, child, cwd: directory }
+}
+
+const quota = { type: 'provider.quota', message: 'Free usage limit reached.', status: 429 }
+
+describe('OpenCode ACP native failure recovery', () => {
+  it('leaves successful turns off the native failure reader', async () => {
+    const { connection, readFailure, agent } = await fixture(quota)
+    agent.on('session/prompt', (frame) => agent.reply(frame, { stopReason: 'end_turn' }))
+    await expect(connection.prompt([{ type: 'text', text: 'hello' }])).resolves.toEqual({
+      stopReason: 'end_turn'
+    })
+    expect(readFailure).not.toHaveBeenCalled()
+  })
+
+  it('reads the selected account after stripping an inherited database override', async () => {
+    vi.stubEnv('OPENCODE_DB', join(tmpdir(), 'other-account', 'opencode.db'))
+    const { connection, readFailure, dbPath } = await fixture(quota)
+    await expect(connection.prompt([{ type: 'text', text: 'hello' }])).rejects.toMatchObject({
+      message: quota.message
+    })
+    expect(readFailure).toHaveBeenCalledWith(expect.objectContaining({ dbPath }))
+  })
+
+  it.each([-32000, -32603])(
+    'reports native quota correctly when ACP returns %i',
+    async (acpCode) => {
+      const { connection, readFailure, dbPath } = await fixture(quota, { acpCode })
+      const error: unknown = await connection
+        .prompt([{ type: 'text', text: 'hello' }])
+        .catch((e) => e)
+      expect(error).toBeInstanceOf(AcpAgentError)
+      expect(error).not.toBeInstanceOf(AcpAuthRequiredError)
+      if (!(error instanceof AcpAgentError)) {
+        throw error
+      }
+      expect(error.message).toBe(quota.message)
+      expect(error.data).toMatchObject({ errorName: 'provider.quota', status: 429 })
+      expect(readFailure).toHaveBeenCalledWith(
+        expect.objectContaining({ dbPath, sessionId: 'ses-own' })
+      )
+      const translator = new AcpTimelineTranslator({
+        sessionId: 'ses-own',
+        agentName: 'OpenCode 2',
+        dialect: OPENCODE_ACP_DIALECT
+      })
+      translator.openPrompt('send', 100)
+      const rows = translator.promptFailed('send', error, 200)
+      expect(rows).toContainEqual(
+        expect.objectContaining({
+          type: 'item.update',
+          body: expect.objectContaining({
+            failure: expect.objectContaining({
+              kind: 'usageLimitReached',
+              detail: { text: quota.message, audience: 'person' }
+            })
+          })
+        })
+      )
+    }
+  )
+
+  it('journals the recovered failure through the full chat adapter and accepts the next send', async () => {
+    const spec = acpLaunchSpecFor('opencode2')
+    if (!spec) {
+      throw new Error('OpenCode 2 launch specification missing')
+    }
+    const { connection, agent, cwd } = await fixture({ ...quota, retryAfterMs: 60_000 })
+    const rig = await openAcpAdapterRig({
+      spec,
+      launch: { cwd },
+      deps: { connect: () => connection, now: Date.now }
+    })
+    cleanups.push(async () => {
+      await rig.adapter.closeSession(SESSION)
+    })
+    await rig.acquire()
+    await sendHello(rig, 'first')
+    await rig.settle()
+    expect((await rig.rig.rows()).map((row) => row.body)).toContainEqual(
+      expect.objectContaining({
+        kind: 'status',
+        tone: 'warning',
+        failure: expect.objectContaining({
+          kind: 'usageLimitReached',
+          detail: { text: quota.message, audience: 'person' },
+          usageLimit: { resetsAt: expect.any(Number) }
+        })
+      })
+    )
+    expect((await rig.rig.turns())[0]?.outcome).toBe('failure')
+    agent.on('session/prompt', (frame) => agent.reply(frame, { stopReason: 'end_turn' }))
+    await sendHello(rig, 'second')
+    await rig.settle()
+    expect((await rig.rig.turns()).map((turn) => turn.outcome)).toEqual(['failure', 'success'])
+  })
+
+  it.each([
+    { type: 'provider.quota', message: 'Insufficient account funds', status: 402 },
+    {
+      type: 'provider.auth',
+      message: 'Provider authentication required',
+      status: 403,
+      response: {
+        body: JSON.stringify({ error: { type: 'FreeTierError', message: 'Free tier restricted' } })
+      }
+    }
+  ])('does not turn billing or access refusal into a sign-in failure: $status', async (native) => {
+    const { connection } = await fixture(native)
+    const error: unknown = await connection
+      .prompt([{ type: 'text', text: 'hello' }])
+      .catch((e) => e)
+    expect(error).not.toBeInstanceOf(AcpAuthRequiredError)
+    if (!(error instanceof AcpAgentError)) {
+      throw error
+    }
+    expect(OPENCODE_ACP_DIALECT.promptFailure?.(error, 100)).toBeUndefined()
+  })
+
+  it('keeps the same session usable after a quota failure', async () => {
+    const { connection, agent } = await fixture(quota)
+    await expect(connection.prompt([{ type: 'text', text: 'hello' }])).rejects.toMatchObject({
+      message: quota.message
+    })
+    agent.on('session/prompt', (frame) => agent.reply(frame, { stopReason: 'end_turn' }))
+    await expect(connection.prompt([{ type: 'text', text: 'try another model' }])).resolves.toEqual(
+      {
+        stopReason: 'end_turn'
+      }
+    )
+    expect(connection.closed).toBe(false)
+  })
+
+  it('keeps another prompt out until native failure recovery settles', async () => {
+    const started = deferred<void>()
+    const gate = deferred<void>()
+    const { connection, agent } = await fixture(quota, {
+      readGate: gate.promise,
+      readStarted: () => started.resolve()
+    })
+    const pending = connection.prompt([{ type: 'text', text: 'first' }]).catch((error) => error)
+    await started.promise
+    const overlapping = connection
+      .prompt([{ type: 'text', text: 'second' }])
+      .catch((error) => error)
+    gate.resolve()
+    await expect(overlapping).resolves.toMatchObject({ message: 'ACP prompt already in progress' })
+    await expect(pending).resolves.toMatchObject({ message: quota.message })
+    expect(agent.frames.filter((frame) => frame.method === 'session/prompt')).toHaveLength(1)
+  })
+
+  it('preserves newer native failure classifications instead of interpreting their raw body again', async () => {
+    const { connection } = await fixture({
+      type: 'provider.free-limit',
+      message: 'Connect a provider or switch models.',
+      status: 429,
+      response: {
+        body: JSON.stringify({ error: { type: 'FreeUsageLimitError', message: 'Legacy message' } })
+      }
+    })
+    await expect(connection.prompt([{ type: 'text', text: 'hello' }])).rejects.toMatchObject({
+      message: 'Connect a provider or switch models.',
+      data: { errorName: 'provider.free-limit', status: 429 }
+    })
+  })
+
+  it('does not consume the same native failure twice when successive prompts share a clock tick', async () => {
+    const clock = vi.spyOn(Date, 'now').mockReturnValue(1_800_000_000_000)
+    try {
+      const { connection, agent } = await fixture(quota)
+      await expect(connection.prompt([{ type: 'text', text: 'first' }])).rejects.toMatchObject({
+        message: quota.message
+      })
+      agent.on('session/prompt', (frame) => agent.fail(frame, -32000, 'Authentication required'))
+      await expect(connection.prompt([{ type: 'text', text: 'second' }])).rejects.toMatchObject({
+        name: 'AcpAuthRequiredError',
+        message: 'Authentication required'
+      })
+    } finally {
+      clock.mockRestore()
+    }
+  })
+
+  it('keeps HTTP 401 classified as authentication even with an access error in the body', async () => {
+    const { connection } = await fixture({
+      type: 'provider.auth',
+      message: 'Invalid API key',
+      status: 401,
+      response: {
+        body: JSON.stringify({ error: { type: 'RegionError', message: 'Region blocked' } })
+      }
+    })
+    await expect(connection.prompt([{ type: 'text', text: 'hello' }])).rejects.toMatchObject({
+      name: 'AcpAuthRequiredError',
+      message: 'Invalid API key'
+    })
+  })
+
+  it('does not revise a closed connection with a late native read', async () => {
+    const started = deferred<void>()
+    const gate = deferred<void>()
+    const { connection, child } = await fixture(quota, {
+      readGate: gate.promise,
+      readStarted: () => started.resolve()
+    })
+    const pending = connection.prompt([{ type: 'text', text: 'hello' }])
+    await started.promise
+    child.emit('exit', 0, null)
+    gate.resolve()
+    await expect(pending).rejects.toMatchObject({
+      name: 'AcpAuthRequiredError',
+      message: 'Authentication required: provider authentication required'
+    })
+  })
+
+  it('keeps genuine authentication failures classified as signed out', async () => {
+    const { connection } = await fixture({
+      type: 'provider.auth',
+      message: 'Invalid API key',
+      status: 401
+    })
+    await expect(connection.prompt([{ type: 'text', text: 'hello' }])).rejects.toMatchObject({
+      name: 'AcpAuthRequiredError',
+      message: 'Invalid API key'
+    })
+  })
+
+  it.each([{ stale: true }, { unavailable: true }])(
+    'retains the ACP error without fresh native evidence: %j',
+    async (options) => {
+      const { connection } = await fixture(quota, options)
+      await expect(connection.prompt([{ type: 'text', text: 'hello' }])).rejects.toMatchObject({
+        name: 'AcpAuthRequiredError',
+        message: 'Authentication required: provider authentication required'
+      })
+    }
+  )
+})
diff --git a/src/main/opencode/opencode-acp-connection.ts b/src/main/opencode/opencode-acp-connection.ts
new file mode 100644
index 00000000000..de4e6a64b7b
--- /dev/null
+++ b/src/main/opencode/opencode-acp-connection.ts
@@ -0,0 +1,121 @@
+import { homedir } from 'node:os'
+import { resolve } from 'node:path'
+import { spawnProcess } from '@orca/process-host'
+import type { PipedProcessSpawner } from '@orca/process-host/process-spec'
+import { isRecord } from '../../shared/agent-status-child-work-value-guards'
+import { AcpAgentConnection, type AcpAgentConnectionOptions } from '../acp/acp-agent-connection'
+import { AcpAgentError, AcpAuthRequiredError, AcpSignInPromptError } from '../acp/acp-errors'
+import type { AcpSessionStartOptions } from '../acp/acp-session-setup'
+import type { PromptRequest } from '../acp/generated/acp-protocol.generated'
+import { readOpenCodePromptFailure } from '../foreign-sqlite-readers/foreign-sqlite-reader-spawn'
+import type { OpenCodePromptFailure } from '../foreign-sqlite-readers/opencode-prompt-failure-result'
+import {
+  resolveProviderChildEnv,
+  type ProviderProcessLaunch
+} from '../provider-process/provider-process-launch'
+import { resolveOpenCodeDatabasePath } from './opencode-data-directory'
+
+const ACCESS_REFUSALS = new Set(['FreeTierError', 'RegionError'])
+
+function nativePromptError(failure: OpenCodePromptFailure, original: AcpAgentError): AcpAgentError {
+  const access =
+    failure.type === 'provider.auth' &&
+    failure.status === 403 &&
+    ACCESS_REFUSALS.has(failure.responseType ?? '')
+  const errorName = access ? 'provider.access' : failure.type
+  const message = (access ? failure.responseMessage : undefined) ?? failure.message
+  const data = {
+    ...(isRecord(original.data) ? original.data : {}),
+    details: message,
+    errorName,
+    ...(failure.status === undefined ? {} : { status: failure.status }),
+    ...(failure.resetsAt === undefined ? {} : { resetsAt: failure.resetsAt })
+  }
+  return !access &&
+    (failure.status === 401 || ['provider.auth', 'provider.authentication'].includes(errorName))
+    ? new AcpAuthRequiredError(
+        message,
+        data,
+        original instanceof AcpAuthRequiredError ? original.authMethods : undefined
+      )
+    : new AcpAgentError(-32603, message, data)
+}
+
+export function createOpenCodeAcpConnection(
+  launch: ProviderProcessLaunch,
+  options: AcpAgentConnectionOptions = {},
+  spawnImpl: PipedProcessSpawner = spawnProcess,
+  readFailure: typeof readOpenCodePromptFailure = readOpenCodePromptFailure
+): AcpAgentConnection {
+  return new OpenCodeAcpConnection(launch, options, spawnImpl, readFailure)
+}
+
+class OpenCodeAcpConnection extends AcpAgentConnection {
+  private readonly dbPath: string | null
+  private providerSessionId: string | undefined
+  private lastRecoveredInput: string | undefined
+  private prompting = false
+
+  constructor(
+    launch: ProviderProcessLaunch,
+    options: AcpAgentConnectionOptions,
+    spawnImpl: PipedProcessSpawner,
+    private readonly readFailure: typeof readOpenCodePromptFailure
+  ) {
+    const env = resolveProviderChildEnv(launch, process.env)
+    const home = (process.platform === 'win32' ? env.USERPROFILE : env.HOME) || homedir()
+    const selected = resolveOpenCodeDatabasePath(env, home)
+    const dbPath = selected === null ? null : resolve(launch.cwd ?? process.cwd(), selected)
+    super(launch, options, spawnImpl)
+    this.dbPath = dbPath
+  }
+
+  override async start(options: AcpSessionStartOptions) {
+    const started = await super.start(options)
+    this.providerSessionId = started.sessionId
+    return started
+  }
+
+  override async prompt(prompt: PromptRequest['prompt'], meta?: PromptRequest['_meta']) {
+    if (this.prompting) {
+      throw new Error('ACP prompt already in progress')
+    }
+    this.prompting = true
+    const startedAt = Date.now()
+    try {
+      return await super.prompt(prompt, meta)
+    } catch (error) {
+      if (
+        !(error instanceof AcpAgentError) ||
+        error instanceof AcpSignInPromptError ||
+        ![-32000, -32603].includes(error.code) ||
+        !this.dbPath ||
+        !this.providerSessionId ||
+        this.closed
+      ) {
+        throw error
+      }
+      const failedAt = Date.now()
+      let failure: OpenCodePromptFailure | null = null
+      try {
+        failure = (
+          await this.readFailure({
+            dbPath: this.dbPath,
+            sessionId: this.providerSessionId,
+            startedAt,
+            failedAt
+          })
+        ).failure
+      } catch {
+        // Native history is best effort; never hide the ACP failure when it cannot be read.
+      }
+      if (!failure || this.closed || failure.inputId === this.lastRecoveredInput) {
+        throw error
+      }
+      this.lastRecoveredInput = failure.inputId
+      throw nativePromptError(failure, error)
+    } finally {
+      this.prompting = false
+    }
+  }
+}
diff --git a/src/main/runtime/structured-agent-runtime-registrations.ts b/src/main/runtime/structured-agent-runtime-registrations.ts
index d2207587d5c..ed570e9c2cd 100644
--- a/src/main/runtime/structured-agent-runtime-registrations.ts
+++ b/src/main/runtime/structured-agent-runtime-registrations.ts
@@ -15,6 +15,7 @@ import { createStructuredClaudeRuntimeAdapter } from './structured-claude-runtim
 import type { AcpLaunchSpec } from '../acp/acp-launch-specs'
 import { acpStructuredAgentDefinition } from '../acp/acp-structured-agent-definitions'
 import { createAcpAgentConnection } from '../acp/acp-agent-connection'
+import { createOpenCodeAcpConnection } from '../opencode/opencode-acp-connection'
 import { acpStructuredLaunchPart } from '../acp/acp-structured-launch-resolution'
 import { AcpStructuredSessionAdapter } from '../acp/acp-structured-session-adapter'
 import { PI_RPC_RUNTIME_REGISTRATION } from '../pi/rpc-runtime-registration'
@@ -173,7 +174,11 @@ function createAcpAdapter(
       readLaunch: composeStructuredLaunchRead(definition, sources, part),
       dataDirectory: deps.stateDirectory,
       resolveLaunchArgs: () => deps.resolveLaunchArgs(spec.agent),
-      connect: deps.openAcpConnection ?? createAcpAgentConnection,
+      connect:
+        deps.openAcpConnection ??
+        (spec.agent === 'opencode' || spec.agent === 'opencode2'
+          ? createOpenCodeAcpConnection
+          : createAcpAgentConnection),
       onChildWorkEvidence: (sessionId, evidence, producer) =>
         context.host()?.publishChildWorkEvidence(sessionId, evidence, producer),
       ...(deps.readProcessStartTime ? { readProcessStartTime: deps.readProcessStartTime } : {}),