diff --git a/src/main/native-chat/agent-session-wire/structured-agent-session-acquisition-options.test.ts b/src/main/native-chat/agent-session-wire/structured-agent-session-acquisition-options.test.ts
new file mode 100644
index 00000000000..8867162af68
--- /dev/null
+++ b/src/main/native-chat/agent-session-wire/structured-agent-session-acquisition-options.test.ts
@@ -0,0 +1,200 @@
+import { mkdtemp, rm } from 'node:fs/promises'
+import { tmpdir } from 'node:os'
+import { join } from 'node:path'
+import { afterEach, describe, expect, it, vi } from 'vitest'
+import { computeAgentSessionPayloadFingerprint } from '../../../shared/agent-session-mutation-envelope'
+import type { AgentSessionOptionsResult } from '../../../shared/agent-session-wire'
+import { AgentSessionRecordStore } from '../../runtime/agent-session-record-store'
+import type { StructuredAgentSessionAdapter } from './structured-agent-session-adapter'
+import {
+  attachFingerprintFields,
+  type AgentSessionAttachParams
+} from './structured-agent-session-attach'
+import { performAttach } from './structured-agent-session-attach-flow'
+
+const NOW = 1_800_000_000_000
+const SESSION = 'legacy-session'
+const CREATE_OPERATION = `${NOW}-${'1'.padStart(32, '0')}`
+const RESUME_OPERATION = `${NOW}-${'2'.padStart(32, '0')}`
+let root: string | null = null
+
+afterEach(async () => {
+  if (root) {
+    await rm(root, { recursive: true, force: true })
+  }
+  root = null
+})
+
+function attachParams(
+  operationId: string,
+  expectedRuntimeFence: number | null
+): AgentSessionAttachParams {
+  const params: AgentSessionAttachParams = {
+    envelope: {
+      sessionId: SESSION,
+      clientOperationId: operationId,
+      expectedRuntimeFence,
+      payloadFingerprint: ''
+    },
+    location: {
+      executionHostId: 'local',
+      wslDistro: null,
+      workspaceId: 'workspace-1',
+      workspaceKind: 'folder'
+    },
+    provider: 'codex',
+    agent: 'codex',
+    accountHome: { variable: 'CODEX_HOME', path: '/home/dev/.codex' },
+    runtimeKind: 'native',
+    providerHandle: { kind: 'codex', threadId: 'legacy-thread' }
+  }
+  return {
+    ...params,
+    envelope: {
+      ...params.envelope,
+      payloadFingerprint: computeAgentSessionPayloadFingerprint({
+        method: 'agentSession.attach',
+        sessionId: SESSION,
+        fields: attachFingerprintFields(params)
+      })
+    }
+  }
+}
+
+function adapter(input: {
+  origin: 'created' | 'resumed'
+  options?: AgentSessionOptionsResult
+}): StructuredAgentSessionAdapter {
+  return {
+    acquire: vi
+      .fn<StructuredAgentSessionAdapter['acquire']>()
+      .mockImplementation(async ({ fence, spawnToken }) => ({
+        process: {
+          hostId: 'local',
+          pid: 4242,
+          processStartTimeMs: NOW,
+          spawnToken
+        },
+        link: {
+          linkId: `${input.origin}-link`,
+          handle: { provider: 'codex', threadId: 'legacy-thread' },
+          origin: input.origin,
+          mintedAtFence: fence,
+          observedAt: NOW
+        }
+      })),
+    ...(input.options ? { readOptions: vi.fn(async () => input.options!) } : {}),
+    dispatch: vi.fn(),
+    cancelTurn: vi.fn(),
+    answerPrompt: vi.fn(),
+    setOption: vi.fn()
+  }
+}
+
+describe('structured session acquisition options', () => {
+  it('persists provider options before proving a resumed legacy record', async () => {
+    root = await mkdtemp(join(tmpdir(), 'orca-acquisition-options-'))
+    const storeDir = join(root, 'store')
+    const store = await AgentSessionRecordStore.open({ directory: storeDir, hostId: 'local' })
+
+    const created = await performAttach({
+      store,
+      adapter: adapter({ origin: 'created' }),
+      journalRoot: root,
+      authority: {
+        spawnToken: 'spawn-a',
+        claimKeyId: 'key-1',
+        handoffOperationId: CREATE_OPERATION,
+        probe: { outcome: 'reservation-unused' }
+      },
+      callerKey: 'client-1',
+      params: attachParams(CREATE_OPERATION, null),
+      now: () => NOW,
+      onAttached: () => {}
+    })
+    expect(created).toMatchObject({ ok: true })
+    expect(store.getRecord(SESSION)?.options).toBeUndefined()
+    await store.replaceSessionOptions({
+      sessionId: SESSION,
+      fence: store.getRecord(SESSION)?.lease.runtimeFence ?? 0,
+      options: { approvalPolicy: 'on-request', personality: 'concise' },
+      now: NOW
+    })
+
+    const resumedStore = await AgentSessionRecordStore.open({
+      directory: storeDir,
+      hostId: 'local'
+    })
+    await resumedStore.reconcileOnRestart({
+      probe: async () => ({ outcome: 'pid-absent' }),
+      now: NOW + 1
+    })
+    const releasedFence = resumedStore.getRecord(SESSION)?.lease.runtimeFence ?? 0
+    const resumed = await performAttach({
+      store: resumedStore,
+      adapter: adapter({
+        origin: 'resumed',
+        options: {
+          current: { model: 'gpt-5.6-terra', effort: 'medium' },
+          models: []
+        }
+      }),
+      journalRoot: root,
+      authority: {
+        spawnToken: 'spawn-b',
+        claimKeyId: 'key-1',
+        handoffOperationId: RESUME_OPERATION,
+        probe: { outcome: 'reservation-unused' }
+      },
+      callerKey: 'client-1',
+      params: attachParams(RESUME_OPERATION, releasedFence),
+      now: () => NOW + 1,
+      onAttached: () => {}
+    })
+
+    expect(resumed).toMatchObject({ ok: true })
+    const reopened = await AgentSessionRecordStore.open({ directory: storeDir, hostId: 'local' })
+    expect(reopened.getRecord(SESSION)?.options).toEqual({
+      approvalPolicy: 'on-request',
+      personality: 'concise',
+      model: 'gpt-5.6-terra',
+      effort: 'medium'
+    })
+  })
+
+  it('releases an acquisition when provider options cannot be read', async () => {
+    root = await mkdtemp(join(tmpdir(), 'orca-acquisition-options-failure-'))
+    const store = await AgentSessionRecordStore.open({
+      directory: join(root, 'store'),
+      hostId: 'local'
+    })
+    const releaseAcquisition = vi.fn(async () => undefined)
+    const failingAdapter: StructuredAgentSessionAdapter = {
+      ...adapter({ origin: 'created' }),
+      readOptions: vi.fn(async () => {
+        throw new Error('model list unavailable')
+      }),
+      releaseAcquisition
+    }
+
+    await expect(
+      performAttach({
+        store,
+        adapter: failingAdapter,
+        journalRoot: root,
+        authority: {
+          spawnToken: 'spawn-a',
+          claimKeyId: 'key-1',
+          handoffOperationId: CREATE_OPERATION,
+          probe: { outcome: 'reservation-unused' }
+        },
+        callerKey: 'client-1',
+        params: attachParams(CREATE_OPERATION, null),
+        now: () => NOW,
+        onAttached: () => {}
+      })
+    ).rejects.toThrow('model list unavailable')
+    expect(releaseAcquisition).toHaveBeenCalledOnce()
+    expect(store.getRecord(SESSION)?.lease.ownerProcess).toBeNull()
+  })
+})
diff --git a/src/main/native-chat/agent-session-wire/structured-agent-session-attach-flow.ts b/src/main/native-chat/agent-session-wire/structured-agent-session-attach-flow.ts
index 9b5e4bfed41..dea24156e7b 100644
--- a/src/main/native-chat/agent-session-wire/structured-agent-session-attach-flow.ts
+++ b/src/main/native-chat/agent-session-wire/structured-agent-session-attach-flow.ts
@@ -26,6 +26,7 @@ import type { AgentSessionRecordStore } from '../../runtime/agent-session-record
 import type { StructuredAgentSessionAdapter } from './structured-agent-session-adapter'
 import { isAgentSessionPreSpawnError } from './structured-agent-session-adapter'
 import type { StructuredAgentSessionEventSink } from './structured-agent-session-event-sink'
+import { readNativeHandoffSessionOptions } from './structured-agent-session-handoff-options'
 
 export type AttachFlowInput = {
   store: AgentSessionRecordStore
@@ -156,6 +157,12 @@ async function acquireOwner(
     ...(input.eventSink ? { events: input.eventSink } : {})
   })
   try {
+    const options = await readNativeHandoffSessionOptions({
+      adapter: input.adapter,
+      sessionId: record.sessionId,
+      fence,
+      ...(record.options ? { priorOptions: record.options } : {})
+    })
     if (record.lease.ownerProcess === null) {
       await input.store.commitProcessIdentity({
         sessionId: record.sessionId,
@@ -170,7 +177,8 @@ async function acquireOwner(
       sessionId: record.sessionId,
       fence,
       link: acquired.link,
-      now: input.now()
+      now: input.now(),
+      ...(options ? { options } : {})
     })
   } catch (error) {
     try {
diff --git a/src/main/native-chat/agent-session-wire/structured-agent-session-handoff-options.ts b/src/main/native-chat/agent-session-wire/structured-agent-session-handoff-options.ts
index 037971b969d..a5afd9891a1 100644
--- a/src/main/native-chat/agent-session-wire/structured-agent-session-handoff-options.ts
+++ b/src/main/native-chat/agent-session-wire/structured-agent-session-handoff-options.ts
@@ -4,8 +4,9 @@ export async function readNativeHandoffSessionOptions(input: {
   adapter: Pick<StructuredAgentSessionAdapter, 'readOptions'>
   sessionId: string
   fence: number
+  priorOptions?: Readonly<Record<string, string>>
 }): Promise<Readonly<Record<string, string>> | undefined> {
-  const { adapter, sessionId, fence } = input
+  const { adapter, sessionId, fence, priorOptions } = input
   const reported = await adapter.readOptions?.({
     sessionId,
     fence
@@ -13,7 +14,9 @@ export async function readNativeHandoffSessionOptions(input: {
   if (!reported) {
     return undefined
   }
+  const { model: _model, effort: _effort, ...restored } = priorOptions ?? {}
   return {
+    ...restored,
     model: reported.current.model,
     ...(reported.current.effort ? { effort: reported.current.effort } : {})
   }
diff --git a/src/main/native-chat/agent-session-wire/structured-agent-session-host-handoff.ts b/src/main/native-chat/agent-session-wire/structured-agent-session-host-handoff.ts
index 42b882d14df..81fb37ec046 100644
--- a/src/main/native-chat/agent-session-wire/structured-agent-session-host-handoff.ts
+++ b/src/main/native-chat/agent-session-wire/structured-agent-session-host-handoff.ts
@@ -133,7 +133,8 @@ async function acquireNativeHandoffOwner(
     const options = await readNativeHandoffSessionOptions({
       adapter: deps.adapter,
       sessionId: input.sessionId,
-      fence: input.fence
+      fence: input.fence,
+      ...(record.options ? { priorOptions: record.options } : {})
     })
     await deps.store.commitProcessIdentity({
       sessionId: input.sessionId,