diff --git a/vscode/src/cc/spawnClaude.test.ts b/vscode/src/cc/spawnClaude.test.ts
index 56b7aa1..7fff74d 100644
--- a/vscode/src/cc/spawnClaude.test.ts
+++ b/vscode/src/cc/spawnClaude.test.ts
@@ -1,7 +1,7 @@
 import { promises as fsp } from 'node:fs'
 import * as os from 'node:os'
 import * as path from 'node:path'
-import { afterEach, beforeEach, describe, expect, it } from 'vitest'
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
 import { ClaudeCancelledError, ClaudeError, ClaudeTimeoutError, runClaudeLines } from './spawnClaude'
 
 let dir: string
@@ -25,23 +25,23 @@ describe('跑 claude、逐行交出 stdout', () => {
   it('每出来完整的一行交一行，最后没带换行的那段结束时交出；参数原样传、在 cwd 里跑', async () => {
     const bin = await fakeBin('printf \'{"a":1}\\n{"b":\'; sleep 0.1; printf \'2}\\n\'; pwd; printf "%s|" "$@"')
     const lines: string[] = []
-    await runClaudeLines({ bin, args: ['-p', '带 空格 的问题'], cwd: dir, onLine: item => lines.push(item) })
+    await runClaudeLines({ bin, args: ['-p', '带 空格 的问题'], cwd: dir, idleTimeoutMs: 5000, onLine: item => lines.push(item) })
     expect(lines).toEqual(['{"a":1}', '{"b":2}', await fsp.realpath(dir), '-p|带 空格 的问题|'])
   })
 
   it('给了 input 就写进 stdin 再关上（stream-json 的消息）；不给时 stdin 是空的，读 stdin 的也不会卡住', async () => {
     const bin = await fakeBin('cat; echo end')
     const withInput: string[] = []
-    await runClaudeLines({ bin, args: [], cwd: dir, input: '{"type":"user"}\n', onLine: item => withInput.push(item) })
+    await runClaudeLines({ bin, args: [], cwd: dir, input: '{"type":"user"}\n', idleTimeoutMs: 5000, onLine: item => withInput.push(item) })
     expect(withInput).toEqual(['{"type":"user"}', 'end'])
     const without: string[] = []
-    await runClaudeLines({ bin, args: [], cwd: dir, timeoutMs: 2000, onLine: item => without.push(item) })
+    await runClaudeLines({ bin, args: [], cwd: dir, idleTimeoutMs: 2000, onLine: item => without.push(item) })
     expect(without).toEqual(['end'])
   })
 
   it('退出码非零：带上 stderr 的原话', async () => {
     const bin = await fakeBin('echo "No conversation found with session ID: x" >&2; exit 1')
-    const error = await runClaudeLines({ bin, args: [], cwd: dir, onLine: () => {} }).catch((err: unknown) => err)
+    const error = await runClaudeLines({ bin, args: [], cwd: dir, idleTimeoutMs: 5000, onLine: () => {} }).catch((err: unknown) => err)
     expect(error).toBeInstanceOf(ClaudeError)
     expect((error as ClaudeError).message).toBe('Claude 退出码非零 (1): No conversation found with session ID: x')
   })
@@ -51,16 +51,85 @@ describe('跑 claude、逐行交出 stdout', () => {
     const bin = await fakeBin(`echo started; sleep 2; touch "${marker}"`)
     const controller = new AbortController()
     const started = Date.now()
-    const run = runClaudeLines({ bin, args: [], cwd: dir, signal: controller.signal, onLine: () => controller.abort() })
+    const run = runClaudeLines({ bin, args: [], cwd: dir, idleTimeoutMs: 5000, signal: controller.signal, onLine: () => controller.abort() })
     await expect(run).rejects.toBeInstanceOf(ClaudeCancelledError)
     expect(Date.now() - started).toBeLessThan(1500)
     await new Promise(resolve => setTimeout(resolve, 2500))
     await expect(fsp.access(marker)).rejects.toThrow()
-    await expect(runClaudeLines({ bin, args: [], cwd: dir, signal: controller.signal, onLine: () => {} })).rejects.toBeInstanceOf(ClaudeCancelledError)
+    await expect(runClaudeLines({ bin, args: [], cwd: dir, idleTimeoutMs: 5000, signal: controller.signal, onLine: () => {} })).rejects.toBeInstanceOf(ClaudeCancelledError)
   }, 10_000)
 
-  it('超时：结束进程，报 ClaudeTimeoutError', async () => {
+  it('一开始就一行都不出：等满 idleTimeoutMs 结束进程，报 ClaudeTimeoutError', async () => {
     const bin = await fakeBin('sleep 5')
-    await expect(runClaudeLines({ bin, args: [], cwd: dir, timeoutMs: 200, onLine: () => {} })).rejects.toBeInstanceOf(ClaudeTimeoutError)
+    await expect(runClaudeLines({ bin, args: [], cwd: dir, idleTimeoutMs: 200, onLine: () => {} })).rejects.toBeInstanceOf(ClaudeTimeoutError)
+  })
+})
+
+describe('按连续多久没动静停，不限总时长', () => {
+  const FIVE_MINUTES = 5 * 60_000
+
+  // 只换掉计时器，进程的输出照真实时间来
+  beforeEach(() => {
+    vi.useFakeTimers({ toFake: ['setTimeout', 'clearTimeout'] })
+  })
+
+  afterEach(() => {
+    vi.useRealTimers()
+  })
+
+  it('一直在出：每来一行过 1 分钟，总共过了 8 分钟也不停，进程自己结束就正常结束', async () => {
+    const bin = await fakeBin('for i in 1 2 3 4 5 6 7 8; do echo "$i"; sleep 0.05; done')
+    const lines: string[] = []
+    await runClaudeLines({
+      bin,
+      args: [],
+      cwd: dir,
+      idleTimeoutMs: FIVE_MINUTES,
+      onLine: (line) => {
+        lines.push(line)
+        vi.advanceTimersByTime(60_000)
+      },
+    })
+    expect(lines).toEqual(['1', '2', '3', '4', '5', '6', '7', '8'])
+  })
+
+  it('出了一行后连续 5 分钟没新的一行：差 1 毫秒时还在等，到点结束进程、报 ClaudeTimeoutError', async () => {
+    const bin = await fakeBin('echo first; sleep 5; echo late')
+    let first: () => void = () => {}
+    const gotFirst = new Promise<void>((resolve) => {
+      first = resolve
+    })
+    let settled = false
+    const run = runClaudeLines({ bin, args: [], cwd: dir, idleTimeoutMs: FIVE_MINUTES, onLine: () => first() }).finally(() => {
+      settled = true
+    })
+    await gotFirst
+    vi.advanceTimersByTime(FIVE_MINUTES - 1)
+    await new Promise(resolve => setImmediate(resolve))
+    expect(settled).toBe(false)
+    vi.advanceTimersByTime(1)
+    await expect(run).rejects.toBeInstanceOf(ClaudeTimeoutError)
+    await expect(run).rejects.toThrow('Claude 连续 300s 没有输出')
+  })
+
+  it('一直在出、已经过了 5 分钟：用户叫停照样马上停，报 ClaudeCancelledError', async () => {
+    const bin = await fakeBin('while true; do echo tick; sleep 0.05; done')
+    const controller = new AbortController()
+    let count = 0
+    const run = runClaudeLines({
+      bin,
+      args: [],
+      cwd: dir,
+      idleTimeoutMs: FIVE_MINUTES,
+      signal: controller.signal,
+      onLine: () => {
+        count += 1
+        vi.advanceTimersByTime(60_000)
+        if (count === 8)
+          controller.abort()
+      },
+    })
+    await expect(run).rejects.toBeInstanceOf(ClaudeCancelledError)
+    expect(count).toBe(8)
   })
 })
diff --git a/vscode/src/cc/spawnClaude.ts b/vscode/src/cc/spawnClaude.ts
index 2295cf3..a689d12 100644
--- a/vscode/src/cc/spawnClaude.ts
+++ b/vscode/src/cc/spawnClaude.ts
@@ -560,9 +560,10 @@ function spawnClaudeStreamed(
 }
 
 /**
- * 跑一次 claude（参数由调用方拼好，一般带 `--output-format stream-json`），stdout 每出来完整的一行就交给 onLine。
- * 正常退出时 resolve；找不到 claude、退出码非零、输出过大时 reject ClaudeError，超时 ClaudeTimeoutError，
- * signal 叫停时结束进程并 reject ClaudeCancelledError。
+ * 跑一次 claude（参数由调用方拼好，一般带 `--output-format stream-json`），stdout 每出来完整的一行就交给 `onLine`；只要还在出就一直等，不限总时长。
+ *
+ * 正常退出时 resolve；找不到 claude、退出码非零、输出过大时 reject [ClaudeError]，连续 `idleTimeoutMs` 没出新的一行时结束进程并 reject [ClaudeTimeoutError]，
+ * `signal` 叫停时结束进程并 reject [ClaudeCancelledError]。
  */
 export function runClaudeLines(opts: {
   args: string[]
@@ -570,12 +571,13 @@ export function runClaudeLines(opts: {
   /** 写进 stdin 后关上（`--input-format stream-json` 的消息，见 buildStreamJsonLine）；不给时 stdin 是空的 */
   input?: string
   onLine: (line: string) => void
-  timeoutMs?: number
+  /** 连续这么多毫秒 stdout 没出新的一行，就当 claude 卡住了 */
+  idleTimeoutMs: number
   signal?: AbortSignal
   /** 默认按 resolveClaudeBin 找 */
   bin?: string
 }): Promise<void> {
-  const timeoutMs = opts.timeoutMs ?? DEFAULT_TIMEOUT_MS
+  const { idleTimeoutMs } = opts
   const bin = opts.bin ?? resolveClaudeBin()
   if (!bin)
     return Promise.reject(new ClaudeError(CLAUDE_MISSING_MSG, ''))
@@ -587,7 +589,6 @@ export function runClaudeLines(opts: {
     let stderr = ''
     let stdoutBytes = 0
     let settled = false
-    const lines = createLineFeeder(opts.onLine)
 
     const child = spawn(bin, opts.args, {
       cwd: opts.cwd,
@@ -598,10 +599,19 @@ export function runClaudeLines(opts: {
     child.stdin.on('error', () => {})
     child.stdin.end(opts.input ?? '')
 
-    const timer = setTimeout(() => {
+    const idle = (): void => {
       child.kill('SIGKILL')
-      settle(new ClaudeTimeoutError(`Claude 调用超时（${Math.round(timeoutMs / 1000)}s）`, stderr))
-    }, timeoutMs)
+      settle(new ClaudeTimeoutError(`Claude 连续 ${Math.round(idleTimeoutMs / 1000)}s 没有输出`, stderr))
+    }
+    let timer = setTimeout(idle, idleTimeoutMs)
+    // 每出来一行都说明 claude 还在干活，从这一行起重新计时
+    const lines = createLineFeeder((line) => {
+      if (settled)
+        return
+      clearTimeout(timer)
+      timer = setTimeout(idle, idleTimeoutMs)
+      opts.onLine(line)
+    })
     function onAbort(): void {
       child.kill('SIGTERM')
       settle(new ClaudeCancelledError(stderr))
diff --git a/vscode/src/codeReader/commentRewrite.test.ts b/vscode/src/codeReader/commentRewrite.test.ts
index 5297254..6fc5f9f 100644
--- a/vscode/src/codeReader/commentRewrite.test.ts
+++ b/vscode/src/codeReader/commentRewrite.test.ts
@@ -156,18 +156,18 @@ describe('读模型交回的结构化结果', () => {
     ].flatMap(parse)
     expect(events[0]).toEqual({ kind: 'activity', label: '读取 a.py' })
     expect(events.filter(event => event.kind === 'text').map(event => 'text' in event && event.text)).toEqual(['把 `', '把 `a` 和 `b` 相加。'])
-    expect(events.at(-1)).toEqual({ kind: 'result', body: '把 `a` 和 `b` 相加。', sessionId: 's1' })
+    expect(events.at(-1)).toEqual({ kind: 'result', body: '把 `a` 和 `b` 相加。' })
   })
 
-  it('会话 id 以 result 行的为准，没有时用开头 init 行的', () => {
+  it('init 行什么都不报：会话 id 由扩展定，不从输出里读', () => {
     const parse = createCommentParser()
     expect(parse(line({ type: 'system', subtype: 'init', session_id: 's0' }))).toEqual([])
-    expect(parse(resultLine({ structured_output: { body: '正文' } }))).toEqual([{ kind: 'result', body: '正文', sessionId: 's0' }])
+    expect(parse(resultLine({ structured_output: { body: '正文' }, session_id: 's0' }))).toEqual([{ kind: 'result', body: '正文' }])
   })
 
   it('模型只回了一段话、structured_output 是空的：结果里没有正文；Claude Code 报错时是失败', () => {
-    expect(createCommentParser()(resultLine({ result: '我改好了：把 a 和 b 相加。', session_id: 's1' }))).toEqual([{ kind: 'result', sessionId: 's1' }])
-    expect(createCommentParser()(resultLine({ result: '', structured_output: { body: '  ' }, session_id: 's1' }))).toEqual([{ kind: 'result', sessionId: 's1' }])
+    expect(createCommentParser()(resultLine({ result: '我改好了：把 a 和 b 相加。', session_id: 's1' }))).toEqual([{ kind: 'result' }])
+    expect(createCommentParser()(resultLine({ result: '', structured_output: { body: '  ' }, session_id: 's1' }))).toEqual([{ kind: 'result' }])
     expect(createCommentParser()(line({ type: 'result', is_error: true, result: '额度用完了' }))).toEqual([{ kind: 'error', message: '额度用完了' }])
   })
 })
diff --git a/vscode/src/codeReader/commentRewrite.ts b/vscode/src/codeReader/commentRewrite.ts
index 9583def..b09c709 100644
--- a/vscode/src/codeReader/commentRewrite.ts
+++ b/vscode/src/codeReader/commentRewrite.ts
@@ -245,12 +245,12 @@ export function commentFollowUp(path: string, startLine: number, endLine: number
 
 /**
  * 从 claude 的 stream-json 输出里读出来的：text 是注释正文到现在为止写出来的（结构化结果逐字长出来），activity 是正在做的事（「读取 routes.py」），
- * result 是答完了（body 是结构化结果里的正文，没按 COMMENT_SCHEMA 交回、正文是空的时没有；sessionId 是这次的会话），error 是 Claude Code 自己报的失败。
+ * result 是答完了（body 是结构化结果里的正文，没按 COMMENT_SCHEMA 交回、正文是空的时没有），error 是 Claude Code 自己报的失败。
  */
 export type CommentEvent
   = | { kind: 'text', text: string }
     | { kind: 'activity', label: string }
-    | { kind: 'result', body?: string, sessionId: string }
+    | { kind: 'result', body?: string }
     | { kind: 'error', message: string }
 
 function isRecord(value: unknown): value is Record<string, unknown> {
@@ -290,8 +290,6 @@ export function createCommentParser(): (line: string) => CommentEvent[] {
   /** 正在写的结构化结果（工具输入的 JSON 原文）；不在写时没有 */
   let json: string | undefined
   let text = ''
-  /** 开头 init 行报的会话 id；result 行没带时用它 */
-  let sessionId = ''
   const grow = (body: string | undefined): CommentEvent[] => {
     if (body === undefined || body === text)
       return []
@@ -328,10 +326,6 @@ export function createCommentParser(): (line: string) => CommentEvent[] {
     // 子代理的消息（parent_tool_use_id 不空）不是这次的结果
     if (!isRecord(line) || (line.parent_tool_use_id !== undefined && line.parent_tool_use_id !== null))
       return []
-    if (line.type === 'system' && line.subtype === 'init') {
-      sessionId = str(line.session_id)
-      return []
-    }
     if (line.type === 'stream_event')
       return isRecord(line.event) ? streamEvent(line.event) : []
     if (line.type === 'assistant')
@@ -343,7 +337,7 @@ export function createCommentParser(): (line: string) => CommentEvent[] {
       return [{ kind: 'error', message: str(line.result).trim() || errors || str(line.subtype) || '没说原因' }]
     }
     const body = bodyOf(line.structured_output)
-    return [{ kind: 'result', ...(body !== undefined && { body }), sessionId: str(line.session_id) || sessionId }]
+    return [{ kind: 'result', ...(body !== undefined && { body }) }]
   }
 }
 
diff --git a/vscode/src/codeReader/qa/answerStream.test.ts b/vscode/src/codeReader/qa/answerStream.test.ts
index 94db1f6..530acf7 100644
--- a/vscode/src/codeReader/qa/answerStream.test.ts
+++ b/vscode/src/codeReader/qa/answerStream.test.ts
@@ -37,26 +37,24 @@ function run(lines: string[]): AnswerEvent[] {
 }
 
 describe('stream-json → 问答的进展', () => {
-  it('会话 id、逐字长出来的回答、读文件、最终回答；新的一条回复一开口就换掉前面那句', () => {
+  it('逐字长出来的回答、读文件、最终回答；新的一条回复一开口就换掉前面那句；init 等 system 行不报东西（会话 id 由扩展定）', () => {
     expect(run(TRANSCRIPT)).toEqual([
-      { kind: 'session', sessionId: SESSION },
       { kind: 'text', text: '我先看看' },
       { kind: 'text', text: '我先看看 m.py。' },
       { kind: 'activity', label: '读取 m.py' },
       { kind: 'text', text: '`add` 返回' },
       { kind: 'text', text: '`add` 返回 `a + b`（`m.py:1`）。' },
-      { kind: 'result', text: '`add` 返回 `a + b`（`m.py:1`）。', sessionId: SESSION },
+      { kind: 'result', text: '`add` 返回 `a + b`（`m.py:1`）。' },
     ])
   })
 
   it('没开逐字片段时按整条 assistant 消息更新，结果一样', () => {
     const whole = TRANSCRIPT.filter(item => !item.includes('"stream_event"'))
     expect(run(whole)).toEqual([
-      { kind: 'session', sessionId: SESSION },
       { kind: 'text', text: '我先看看 m.py。' },
       { kind: 'activity', label: '读取 m.py' },
       { kind: 'text', text: '`add` 返回 `a + b`（`m.py:1`）。' },
-      { kind: 'result', text: '`add` 返回 `a + b`（`m.py:1`）。', sessionId: SESSION },
+      { kind: 'result', text: '`add` 返回 `a + b`（`m.py:1`）。' },
     ])
   })
 
@@ -73,7 +71,7 @@ describe('stream-json → 问答的进展', () => {
 
   it('result 行没带回答时用眼下这条回复', () => {
     expect(run([delta('答案'), line({ type: 'result', subtype: 'success', is_error: false, result: '', session_id: SESSION })]).at(-1))
-      .toEqual({ kind: 'result', text: '答案', sessionId: SESSION })
+      .toEqual({ kind: 'result', text: '答案' })
   })
 
   it('要了结构化结果（--json-schema）：交结果的那次工具调用是「整理结果」，result 行带上交回的结构；result 里那份 JSON 不当回答的字', () => {
@@ -83,10 +81,10 @@ describe('stream-json → 问答的进展', () => {
       line({ type: 'result', subtype: 'success', is_error: false, result: JSON.stringify(output), structured_output: output, session_id: SESSION }),
     ])).toEqual([
       { kind: 'activity', label: '整理结果' },
-      { kind: 'result', text: '', sessionId: SESSION, output },
+      { kind: 'result', text: '', output },
     ])
     expect(run([delta('找到了。'), line({ type: 'result', is_error: false, result: '{}', structured_output: {}, session_id: SESSION })]).at(-1))
-      .toEqual({ kind: 'result', text: '找到了。', sessionId: SESSION, output: {} })
+      .toEqual({ kind: 'result', text: '找到了。', output: {} })
   })
 
   it('claude 自己报的失败：取它说的原因', () => {
diff --git a/vscode/src/codeReader/qa/answerStream.ts b/vscode/src/codeReader/qa/answerStream.ts
index 1a6e74f..335d7eb 100644
--- a/vscode/src/codeReader/qa/answerStream.ts
+++ b/vscode/src/codeReader/qa/answerStream.ts
@@ -1,6 +1,6 @@
 /**
  * 把 `claude -p --output-format stream-json --verbose --include-partial-messages` 吐出的每行 NDJSON
- * 换成问答要的几件事：会话 id、回答逐字长出来、正在读什么文件、答完 / 出错。
+ * 换成问答要的几件事：回答逐字长出来、正在读什么文件、答完 / 出错。会话 id 由扩展定（见 [askClaude](vscode/src/codeReader/qa/claudeAsk.ts#askClaude)），不从这里读。
  *
  * 回答显示的是眼下这条回复：Claude 先说一句「我去看看 X」、读完文件再回答时，新回复一开口就换掉前面那句，
  * 答完以 result 行里的最终回复为准（就是最后那条回复）。没开 partial messages 时按整条 assistant 消息更新，结果一样。
@@ -9,13 +9,12 @@
 import { describeToolUse } from '../../cc/claudeProgress'
 
 export type AnswerEvent
-  = | { kind: 'session', sessionId: string }
-    /** 眼下这条回复到现在为止的全文（Markdown） */
-    | { kind: 'text', text: string }
+  /** 眼下这条回复到现在为止的全文（Markdown） */
+  = | { kind: 'text', text: string }
     /** 正在做的事：「读取 routes.py」「搜索 get_user」 */
     | { kind: 'activity', label: string }
     /** 答完了；要了结构化结果（--json-schema）时 output 是交回的结构（result 行的 structured_output），没要、没交时没有 */
-    | { kind: 'result', text: string, sessionId: string, output?: unknown }
+    | { kind: 'result', text: string, output?: unknown }
     /** Claude Code 自己报的失败（result 行 is_error），进程多半也会以非零退出 */
     | { kind: 'error', message: string }
 
@@ -30,7 +29,6 @@ function str(value: unknown): string {
 /** 一个问题一个解析器：它记着眼下这条回复写到哪了。 */
 export function createAnswerParser(): (line: string) => AnswerEvent[] {
   let text = ''
-  let sessionId = ''
   /** 新的一条回复开始了，下一个字换掉前面那条 */
   let fresh = false
   /** 见过逐字的片段：整条 assistant 消息里的字就不再算，免得重复 */
@@ -91,7 +89,6 @@ export function createAnswerParser(): (line: string) => AnswerEvent[] {
     return [{
       kind: 'result',
       text: output === undefined ? str(line.result).trim() || text : text,
-      sessionId: str(line.session_id) || sessionId,
       ...(output !== undefined && { output }),
     }]
   }
@@ -108,12 +105,6 @@ export function createAnswerParser(): (line: string) => AnswerEvent[] {
     if (!isRecord(line) || (line.parent_tool_use_id !== undefined && line.parent_tool_use_id !== null))
       return []
     switch (line.type) {
-      case 'system':
-        if (line.subtype === 'init' && typeof line.session_id === 'string') {
-          sessionId = line.session_id
-          return [{ kind: 'session', sessionId }]
-        }
-        return []
       case 'stream_event':
         return isRecord(line.event) ? streamEvent(line.event) : []
       case 'assistant':
diff --git a/vscode/src/codeReader/qa/askProfiles.test.ts b/vscode/src/codeReader/qa/askProfiles.test.ts
index e2bccd6..0191633 100644
--- a/vscode/src/codeReader/qa/askProfiles.test.ts
+++ b/vscode/src/codeReader/qa/askProfiles.test.ts
@@ -8,6 +8,8 @@ const DIR = '/home/me/profiles'
 const profile = (name: string): ClaudeProfile => ({ name, path: `${DIR}/${name}.json` })
 const PROFILES = [profile('dsflash'), profile('offical'), profile('sonnet')]
 const DEFAULT_PATH = `${DIR}/offical.json`
+/** 拼参数时随便给的一个新会话，这里只看 --settings */
+const NEW_SESSION = { id: 'new-1', resume: false }
 
 function source(profiles: ClaudeProfile[] = PROFILES): ProfileSource {
   return { list: async () => profiles, defaultPath: () => DEFAULT_PATH, directory: () => DIR }
@@ -74,7 +76,7 @@ describe('默认模型与临时选择', () => {
       expect(choice.selected).toBe('')
       expect(choice.options).toContainEqual(DEFAULT_OPTION)
       expect(await profiles.current()).toBeUndefined()
-      expect(askArgs({ profilePath: (await profiles.current())?.path })).not.toContain('--settings')
+      expect(askArgs({ profilePath: (await profiles.current())?.path, session: NEW_SESSION })).not.toContain('--settings')
     }
   })
 
@@ -117,7 +119,7 @@ describe('默认模型与临时选择', () => {
     const configured = `${DIR}/dsflash.json`
     const profiles = new AskProfiles('问答', () => configured, source())
     expect(await profiles.current()).toEqual(profile('dsflash'))
-    expect(askArgs({ profilePath: (await profiles.current())?.path }).slice(0, 2)).toEqual(['--settings', configured])
+    expect(askArgs({ profilePath: (await profiles.current())?.path, session: NEW_SESSION }).slice(0, 2)).toEqual(['--settings', configured])
     await profiles.select('sonnet')
     expect((await profiles.choice()).selected).toBe('sonnet')
     expect(await profiles.current()).toEqual(profile('sonnet'))
@@ -183,11 +185,11 @@ describe('默认模型与临时选择', () => {
     const profiles = new AskProfiles('问答', () => `${DIR}/sonnet.json`, source())
     const chosen = await profiles.current()
     expect(chosen).toEqual(profile('sonnet'))
-    expect(askArgs({ profilePath: chosen?.path }).slice(0, 2)).toEqual(['--settings', `${DIR}/sonnet.json`])
+    expect(askArgs({ profilePath: chosen?.path, session: NEW_SESSION }).slice(0, 2)).toEqual(['--settings', `${DIR}/sonnet.json`])
 
     const none = await new AskProfiles('问答', () => '', source([])).current()
     expect(none).toBeUndefined()
-    expect(askArgs({ profilePath: none?.path })).not.toContain('--settings')
+    expect(askArgs({ profilePath: none?.path, session: NEW_SESSION })).not.toContain('--settings')
   })
 
   it('没选过：用插件的默认 profile（和以前问 AI 用的一样）', async () => {
diff --git a/vscode/src/codeReader/qa/asks.test.ts b/vscode/src/codeReader/qa/asks.test.ts
index c1a8f97..c580882 100644
--- a/vscode/src/codeReader/qa/asks.test.ts
+++ b/vscode/src/codeReader/qa/asks.test.ts
@@ -17,7 +17,7 @@ function fakeRunner(): { runner: (run: AskRun) => Promise<Answer>, runs: (AskRun
 }
 
 function start(askId: string, anchor = askId, owner = 'file:///a.py'): AskStart {
-  return { owner, askId, anchor, question: `问 ${askId}`, run: { prompt: `完整的 ${askId}`, images: [], cwd: '/work' } }
+  return { owner, askId, anchor, question: `问 ${askId}`, run: { prompt: `完整的 ${askId}`, images: [], cwd: '/work', onSession: async () => {} } }
 }
 
 function listener(): { updates: RunningAsk[], ends: [RunningAsk, AskEnd][], ended: Promise<void>, update: (ask: RunningAsk) => void, end: (ask: RunningAsk, end: AskEnd) => void } {
@@ -44,7 +44,6 @@ describe('正在答的问题', () => {
     const events = listener()
     expect(asks.start(start('1'), events)).toBeUndefined()
     expect(runs[0]).toMatchObject({ prompt: '完整的 1', cwd: '/work' })
-    runs[0].onEvent({ kind: 'session', sessionId: 's' })
     runs[0].onEvent({ kind: 'activity', label: '读取 m.py' })
     runs[0].onEvent({ kind: 'text', text: '答' })
     expect(events.updates).toEqual([
@@ -53,9 +52,9 @@ describe('正在答的问题', () => {
       { askId: '1', anchor: '1', question: '问 1', text: '答' },
     ])
     expect(asks.currentFor('file:///a.py')).toEqual([{ askId: '1', anchor: '1', question: '问 1', text: '答', status: 'running' }])
-    runs[0].answer({ text: '答案', sessionId: 's' })
+    runs[0].answer({ text: '答案' })
     await events.ended
-    expect(events.ends).toEqual([[{ askId: '1', anchor: '1', question: '问 1', text: '答' }, { status: 'done', answer: { text: '答案', sessionId: 's' } }]])
+    expect(events.ends).toEqual([[{ askId: '1', anchor: '1', question: '问 1', text: '答' }, { status: 'done', answer: { text: '答案' } }]])
     expect(asks.currentFor('file:///a.py')).toEqual([])
   })
 
@@ -95,7 +94,7 @@ describe('正在答的问题', () => {
         return { status: 'failed', error: '交回的结果不对：没有环节列表。' }
       },
     })
-    runs[0].answer({ text: '', sessionId: 's' })
+    runs[0].answer({ text: '' })
     await done
     await Promise.resolve()
     expect(asks.currentFor('file:///a.py')).toEqual([{ askId: '1', anchor: '1', question: '问 1', text: '', status: 'failed', error: '交回的结果不对：没有环节列表。' }])
@@ -121,7 +120,7 @@ describe('正在答的问题', () => {
     asks.start(start('3'), listener())
     expect(asks.start(start('4'), listener())).toBe('同时最多问 3 个问题，等前面的答完再问。')
     expect(runs).toHaveLength(3)
-    runs[0].answer({ text: '答', sessionId: 's' })
+    runs[0].answer({ text: '答' })
     await first.ended
     expect(asks.start(start('4'), listener())).toBeUndefined()
     expect(runs).toHaveLength(4)
@@ -135,9 +134,9 @@ describe('正在答的问题', () => {
     expect(rewrites.start(start('2', 'function f'), listener())).toBe('这段注释已经在重写了，等它写完或者先停下再说。')
     rewrites.start(start('3', 'function g'), listener())
     expect(rewrites.start(start('4', 'function g'), listener())).toBe('这段注释已经在重写了，等它写完或者先停下再说。')
-    runs[0].fail(new ClaudeTimeoutError('Claude 调用超时（900s）', ''))
+    runs[0].fail(new ClaudeTimeoutError('Claude 连续 600s 没有输出', ''))
     await first.ended
-    expect(first.ends[0][1]).toEqual({ status: 'failed', error: '等了 15 分钟还没写完，已经停掉。' })
+    expect(first.ends[0][1]).toEqual({ status: 'failed', error: '连续 10 分钟没有任何动静，已经停掉。接着说「继续」会从停下的地方接着写。' })
   })
   it('出错、叫停的那一轮没记下，留在这里给重新加载的页面再画出来；这块再开一轮、收起这块时去掉，别的文件不算', async () => {
     const { runner, runs } = fakeRunner()
@@ -203,7 +202,7 @@ describe('重写注释排成一队', () => {
       { askId: '4', anchor: 'function k', question: '问 4', text: '', status: 'queued' },
     ])
 
-    runs[0].answer({ text: '写好了', sessionId: 's1' })
+    runs[0].answer({ text: '写好了' })
     await a.ended
     await after()
     expect(runs.map(run => run.prompt)).toEqual(['完整的 1', '完整的 2'])
@@ -232,7 +231,7 @@ describe('重写注释排成一队', () => {
     await b.ended
     expect(b.ends).toEqual([[{ askId: '2', anchor: 'function g', question: '问 2', text: '' }, { status: 'stopped' }]])
     expect(rewrites.currentFor('file:///a.py').map(ask => [ask.askId, ask.status])).toEqual([['1', 'running'], ['2', 'stopped'], ['3', 'queued']])
-    runs[0].answer({ text: '写好了', sessionId: 's1' })
+    runs[0].answer({ text: '写好了' })
     await a.ended
     await after()
     expect(runs.map(run => run.prompt)).toEqual(['完整的 1', '完整的 3'])
diff --git a/vscode/src/codeReader/qa/asks.ts b/vscode/src/codeReader/qa/asks.ts
index 8263993..ae0d132 100644
--- a/vscode/src/codeReader/qa/asks.ts
+++ b/vscode/src/codeReader/qa/asks.ts
@@ -20,10 +20,9 @@ export interface RunningAsk {
   queued?: true
 }
 
-/** 进行中报上来的：会话 id、回答长出来的字、正在做的事。 */
+/** 进行中报上来的：回答长出来的字、正在做的事。 */
 export type RunEvent
-  = | { kind: 'session', sessionId: string }
-    | { kind: 'text', text: string }
+  = | { kind: 'text', text: string }
     | { kind: 'activity', label: string }
 
 /** 跑一轮要的：叫停的开关，进行中的消息交给谁。 */
@@ -153,11 +152,8 @@ export class QaAsks<Run extends { signal: AbortSignal } = AskRun, Result = Answe
             ask.text = event.text
             delete ask.activity
           }
-          else if (event.kind === 'activity') {
-            ask.activity = event.label
-          }
           else {
-            return
+            ask.activity = event.label
           }
           listener.update({ ...ask })
         },
diff --git a/vscode/src/codeReader/qa/claudeAsk.test.ts b/vscode/src/codeReader/qa/claudeAsk.test.ts
index f89f8de..9921b9f 100644
--- a/vscode/src/codeReader/qa/claudeAsk.test.ts
+++ b/vscode/src/codeReader/qa/claudeAsk.test.ts
@@ -3,7 +3,7 @@ import type { AskDeps, AskRun, CommentAsk, CommentAskDeps } from './claudeAsk'
 import { describe, expect, it } from 'vitest'
 import { CLAUDE_MISSING_MSG, ClaudeCancelledError, ClaudeError, ClaudeTimeoutError } from '../../cc/spawnClaude'
 import { COMMENT_SCHEMA } from '../commentRewrite'
-import { askArgs, askClaude, askCommentBody, askFailure, commentPluginRoot, pluginRootIn, REWRITE_TIMEOUT_MS, rewriteArgs, rewriteFailure } from './claudeAsk'
+import { ASK_IDLE_TIMEOUT_MS, askArgs, askClaude, askCommentBody, askFailure, commentPluginRoot, pluginRootIn, REWRITE_IDLE_TIMEOUT_MS, rewriteArgs, rewriteFailure } from './claudeAsk'
 
 type RunLinesOptions = Parameters<typeof runClaudeLines>[0]
 
@@ -29,11 +29,39 @@ function fakeClaude(runs: { lines: string[], error?: Error }[]): { deps: AskDeps
   }
 }
 
-function request(overrides: Partial<AskRun> = {}): AskRun & { events: unknown[] } {
+/** 一次提问；onSession 记下的会话 id 在 sessions 里 */
+function request(overrides: Partial<AskRun> = {}): AskRun & { events: unknown[], sessions: string[] } {
   const events: unknown[] = []
-  return { prompt: '完整的问题', images: [], cwd: '/work', signal: new AbortController().signal, onEvent: event => events.push(event), events, ...overrides }
+  const sessions: string[] = []
+  return {
+    prompt: '完整的问题',
+    images: [],
+    cwd: '/work',
+    signal: new AbortController().signal,
+    onEvent: event => events.push(event),
+    onSession: async (id) => {
+      sessions.push(id)
+    },
+    events,
+    sessions,
+    ...overrides,
+  }
 }
 
+const UUID = /^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/
+
+/** 参数里 flag 后面跟的那一项；没有这个 flag 时没有 */
+function argAfter(args: string[], flag: string): string | undefined {
+  const at = args.indexOf(flag)
+  return at < 0 ? undefined : args[at + 1]
+}
+
+/** 等已经排上的异步都跑完（onSession 记下之前进程不该起来） */
+const settle = (): Promise<void> => new Promise(resolve => setImmediate(resolve))
+
+const NEW = { id: 'new-1', resume: false }
+const RESUME = { id: 'session-1', resume: true }
+
 const PNG = { mediaType: 'image/png', base64: 'iVBORw0KGgo=' }
 const JPEG = { mediaType: 'image/jpeg', base64: '/9j/4AAQ' }
 
@@ -49,8 +77,8 @@ function sent(call: RunLinesOptions): { text: string, images: unknown[] } {
 }
 
 describe('命令行参数', () => {
-  it('只读：只给读、搜的工具，别的一律拒、不等人批，不加载 MCP；不带跳过权限；问题从 stdin 按 stream-json 进，输出逐字的 stream-json', () => {
-    const args = askArgs({ profilePath: '/p/offical.json' })
+  it('只读：只给读、搜的工具，别的一律拒、不等人批，不加载 MCP；不带跳过权限；开新会话用扩展给的 id；问题从 stdin 按 stream-json 进，输出逐字的 stream-json', () => {
+    const args = askArgs({ profilePath: '/p/offical.json', session: NEW })
     expect(args).toEqual([
       '--settings',
       '/p/offical.json',
@@ -61,6 +89,8 @@ describe('命令行参数', () => {
       '--permission-mode',
       'dontAsk',
       '--strict-mcp-config',
+      '--session-id',
+      'new-1',
       '-p',
       '--input-format',
       'stream-json',
@@ -69,17 +99,19 @@ describe('命令行参数', () => {
       '--verbose',
       '--include-partial-messages',
     ])
-    expect(args.join(' ')).not.toMatch(/dangerously|bypassPermissions|Edit|Write|Bash/)
+    expect(args.join(' ')).not.toMatch(/dangerously|bypassPermissions|Edit|Write|Bash|--resume|--fork-session/)
   })
 
-  it('追问带 --resume，放在 -p 前面；没有 profile 就不带 --settings', () => {
-    const args = askArgs({ resume: 'session-1' })
+  it('追问带 --resume、不带 --session-id，放在 -p 前面；没有 profile 就不带 --settings', () => {
+    const args = askArgs({ session: RESUME })
     expect(args).not.toContain('--settings')
+    expect(args).not.toContain('--session-id')
+    expect(args).not.toContain('--fork-session')
     expect(args.slice(args.indexOf('--resume'), args.indexOf('--resume') + 3)).toEqual(['--resume', 'session-1', '-p'])
   })
 
   it('要结构化结果时带 --json-schema；别的工作区文件夹用 --add-dir 加进来读；照样只读、能接着会话', () => {
-    const args = askArgs({ resume: 'session-1', schema: '{"type":"object"}', addDirs: ['/ws/server', '/ws/docs'] })
+    const args = askArgs({ session: RESUME, schema: '{"type":"object"}', addDirs: ['/ws/server', '/ws/docs'] })
     expect(args.slice(0, 4)).toEqual(['--tools', 'Read,Grep,Glob', '--allowedTools', 'Read,Grep,Glob'])
     expect(args.slice(args.indexOf('--permission-mode'), args.indexOf('--permission-mode') + 2)).toEqual(['--permission-mode', 'dontAsk'])
     expect(args).toContain('--strict-mcp-config')
@@ -87,7 +119,7 @@ describe('命令行参数', () => {
     expect(args.slice(args.indexOf('--resume'), args.indexOf('--resume') + 3)).toEqual(['--resume', 'session-1', '-p'])
     expect(args.slice(-2)).toEqual(['--json-schema', '{"type":"object"}'])
     expect(args.join(' ')).not.toMatch(/dangerously|bypassPermissions|Edit|Write|Bash/)
-    expect(askArgs({ addDirs: [] })).not.toContain('--add-dir')
+    expect(askArgs({ session: NEW, addDirs: [] })).not.toContain('--add-dir')
   })
 })
 
@@ -123,21 +155,52 @@ describe('问题连同图片从 stdin 发', () => {
 })
 
 describe('问一次', () => {
-  it('在工作区文件夹里跑、带超时和叫停；过程交给 onEvent，答完返回最终回答和会话 id', async () => {
-    const { deps, calls } = fakeClaude([{ lines: [init('s1'), delta('答'), delta('案'), result('答案', 's1')] }])
+  it('在工作区文件夹里跑、按没动静计时、能叫停；过程交给 onEvent，答完返回最终回答', async () => {
+    const { deps, calls } = fakeClaude([{ lines: [init('claude-起的'), delta('答'), delta('案'), result('答案', 'claude-起的')] }])
     const run = request({ profilePath: '/profiles/sonnet.json' })
-    expect(await askClaude(run, deps)).toEqual({ text: '答案', sessionId: 's1' })
-    expect(run.events).toEqual([{ kind: 'session', sessionId: 's1' }, { kind: 'text', text: '答' }, { kind: 'text', text: '答案' }])
+    expect(await askClaude(run, deps)).toEqual({ text: '答案' })
+    expect(run.events).toEqual([{ kind: 'text', text: '答' }, { kind: 'text', text: '答案' }])
     expect(calls).toHaveLength(1)
-    expect(calls[0]).toMatchObject({ cwd: '/work', signal: run.signal, timeoutMs: 300_000 })
+    expect(calls[0]).toMatchObject({ cwd: '/work', signal: run.signal, idleTimeoutMs: ASK_IDLE_TIMEOUT_MS })
+    expect(ASK_IDLE_TIMEOUT_MS).toBe(5 * 60_000)
     expect(calls[0].args.slice(0, 2)).toEqual(['--settings', '/profiles/sonnet.json'])
     expect(sent(calls[0]).text).toBe('完整的问题')
   })
 
+  it('开新会话：会话 id 由扩展生成，先等 onSession 记下才起进程，参数带 --session-id 这个 id；init、result 行报的会话 id 不用', async () => {
+    const { deps, calls } = fakeClaude([{ lines: [init('claude-起的'), result('答案', 'claude-起的')] }])
+    let saved: () => void = () => {}
+    const sessions: string[] = []
+    const answer = askClaude(request({
+      onSession: (id) => {
+        sessions.push(id)
+        return new Promise((resolve) => {
+          saved = resolve
+        })
+      },
+    }), deps)
+    await settle()
+    expect(sessions).toHaveLength(1)
+    expect(sessions[0]).toMatch(UUID)
+    expect(calls).toHaveLength(0)
+    saved()
+    expect(await answer).toEqual({ text: '答案' })
+    expect(argAfter(calls[0].args, '--session-id')).toBe(sessions[0])
+    expect(calls[0].args).not.toContain('--resume')
+  })
+
+  it('每次开新会话的 id 都不一样', async () => {
+    const first = request()
+    const second = request()
+    await askClaude(first, fakeClaude([{ lines: [result('答案', 's')] }]).deps)
+    await askClaude(second, fakeClaude([{ lines: [result('答案', 's')] }]).deps)
+    expect(first.sessions[0]).not.toBe(second.sessions[0])
+  })
+
   it('要结构化结果：参数带上 schema 和加进来的目录，交回的结构化结果一并返回；只交了结构化结果、没说话也算答了', async () => {
     const output = { groups: [] }
     const { deps, calls } = fakeClaude([{ lines: [init('s1'), line({ type: 'result', subtype: 'success', is_error: false, result: '', structured_output: output, session_id: 's1' })] }])
-    expect(await askClaude(request({ schema: '{"type":"object"}', addDirs: ['/ws/b'] }), deps)).toEqual({ text: '', sessionId: 's1', output })
+    expect(await askClaude(request({ schema: '{"type":"object"}', addDirs: ['/ws/b'] }), deps)).toEqual({ text: '', output })
     expect(calls[0].args.slice(-2)).toEqual(['--json-schema', '{"type":"object"}'])
     expect(calls[0].args).toContain('/ws/b')
   })
@@ -148,22 +211,30 @@ describe('问一次', () => {
     expect(calls[0].args).not.toContain('--settings')
   })
 
-  it('追问接着上次的会话问短问题；换了 profile 也接着问，带上这次选的 --settings', async () => {
+  it('追问 --resume 上次的会话、发短问题，不开新会话、不再记会话；换了 profile 也接着问，带上这次选的 --settings', async () => {
     const { deps, calls } = fakeClaude([{ lines: [result('接着答', 's1')] }])
-    expect(await askClaude(request({ profilePath: '/profiles/opus.json', followUp: { sessionId: 's1', prompt: '短问题' } }), deps)).toEqual({ text: '接着答', sessionId: 's1' })
+    const run = request({ profilePath: '/profiles/opus.json', followUp: { sessionId: 's1', prompt: '短问题' } })
+    expect(await askClaude(run, deps)).toEqual({ text: '接着答' })
     expect(calls[0].args.slice(0, 2)).toEqual(['--settings', '/profiles/opus.json'])
-    expect(calls[0].args.slice(calls[0].args.indexOf('--resume'), calls[0].args.indexOf('--resume') + 2)).toEqual(['--resume', 's1'])
+    expect(argAfter(calls[0].args, '--resume')).toBe('s1')
+    expect(calls[0].args).not.toContain('--session-id')
     expect(sent(calls[0]).text).toBe('短问题')
+    expect(run.sessions).toEqual([])
   })
 
-  it('上次的会话找不到了：按完整问题重新开一次', async () => {
+  it('上次的会话找不到了：生成新的会话 id、记下后按完整问题重新开一次', async () => {
     const { deps, calls } = fakeClaude([
       { lines: [], error: new ClaudeError('Claude 退出码非零 (1): No conversation found with session ID: s0', 'No conversation found with session ID: s0') },
       { lines: [init('s2'), result('重新答', 's2')] },
     ])
-    expect(await askClaude(request({ profilePath: '/profiles/opus.json', followUp: { sessionId: 's0', prompt: '短问题' } }), deps)).toEqual({ text: '重新答', sessionId: 's2' })
+    const run = request({ profilePath: '/profiles/opus.json', followUp: { sessionId: 's0', prompt: '短问题' } })
+    expect(await askClaude(run, deps)).toEqual({ text: '重新答' })
     expect(calls).toHaveLength(2)
+    expect(argAfter(calls[0].args, '--resume')).toBe('s0')
+    expect(run.sessions).toHaveLength(1)
+    expect(run.sessions[0]).toMatch(UUID)
     expect(calls[1].args).not.toContain('--resume')
+    expect(argAfter(calls[1].args, '--session-id')).toBe(run.sessions[0])
     expect(calls[1].args.slice(0, 2)).toEqual(['--settings', '/profiles/opus.json'])
     expect(sent(calls[1]).text).toBe('完整的问题')
   })
@@ -183,21 +254,35 @@ describe('问一次', () => {
     expect(calls).toHaveLength(2)
   })
 
-  it('别的失败不重试，照样抛出来；Claude 报的失败、没给回答也算失败', async () => {
+  it('别的失败不重试，照样抛出来、不开新会话；Claude 报的失败、没给回答也算失败', async () => {
     const timeout = new ClaudeTimeoutError('超时', '')
     const failing = fakeClaude([{ lines: [], error: timeout }, { lines: [result('不该到这', 's')] }])
-    await expect(askClaude(request({ followUp: { sessionId: 's0', prompt: '短问题' } }), failing.deps)).rejects.toBe(timeout)
+    const run = request({ followUp: { sessionId: 's0', prompt: '短问题' } })
+    await expect(askClaude(run, failing.deps)).rejects.toBe(timeout)
     expect(failing.calls).toHaveLength(1)
+    expect(run.sessions).toEqual([])
     await expect(askClaude(request(), fakeClaude([{ lines: [line({ type: 'result', is_error: true, result: 'Invalid API key · Please run /login' })] }]).deps))
       .rejects
       .toThrow('Invalid API key')
     await expect(askClaude(request(), fakeClaude([{ lines: [init('s')] }]).deps)).rejects.toThrow('没给出回答')
   })
+
+  it('新会话没答完就停了：会话 id 已经记下，下次用它接着问', async () => {
+    const run = request()
+    const stopped = fakeClaude([{ lines: [init('s'), delta('答到一半')], error: new ClaudeCancelledError('') }])
+    await expect(askClaude(run, stopped.deps)).rejects.toBeInstanceOf(ClaudeCancelledError)
+    expect(run.sessions).toHaveLength(1)
+    const again = fakeClaude([{ lines: [result('接着答完', 's')] }])
+    const next = request({ followUp: { sessionId: run.sessions[0], prompt: '继续' } })
+    expect(await askClaude(next, again.deps)).toEqual({ text: '接着答完' })
+    expect(argAfter(again.calls[0].args, '--resume')).toBe(run.sessions[0])
+    expect(sent(again.calls[0]).text).toBe('继续')
+  })
 })
 
 describe('失败了给人看的话', () => {
-  it('超时、没装、没登录、别的', () => {
-    expect(askFailure(new ClaudeTimeoutError('超时', ''))).toBe('等了 5 分钟还没答完，已经停掉。可以把问题问得具体一点再试。')
+  it('太久没动静、没装、没登录、别的', () => {
+    expect(askFailure(new ClaudeTimeoutError('超时', ''))).toBe('连续 5 分钟没有任何动静，已经停掉。接着说「继续」会从停下的地方接着做。')
     expect(askFailure(new ClaudeError(CLAUDE_MISSING_MSG, ''))).toContain('没找到 Claude Code')
     expect(askFailure(new ClaudeError('Claude 退出码非零 (1): Invalid API key · Please run /login', ''))).toMatch(/^Claude Code 没登录或登录过期了：在终端里运行 claude 登录一下再问。/)
     expect(askFailure(new ClaudeError('Claude 退出码非零 (1): 网络断了', ''))).toBe('Claude Code 没答成：Claude 退出码非零 (1): 网络断了')
@@ -209,7 +294,7 @@ describe('重写注释的命令行参数', () => {
   const allowed = 'Read,Grep,Glob,Bash(/Applications/OpenPencil.app/Contents/MacOS/op *),Bash(mkdir -p docs/prototype/*/openpencil/exports),Edit(/docs/prototype/*/openpencil/**)'
 
   it('不读用户、项目的设置（--restricted），写注释的插件单独加载、能读；只放开读搜、OpenPencil 的 op、建原型的 exports 目录、改原型目录，别的一律拒、不加载 MCP；按 JSON Schema 交结果', () => {
-    const args = rewriteArgs({ pluginRoot: '/plugins/ecc', profilePath: '/p/sonnet.json' })
+    const args = rewriteArgs({ pluginRoot: '/plugins/ecc', profilePath: '/p/sonnet.json', session: NEW })
     expect(args).toEqual([
       '--settings',
       '/p/sonnet.json',
@@ -227,6 +312,8 @@ describe('重写注释的命令行参数', () => {
       '--permission-mode',
       'dontAsk',
       '--strict-mcp-config',
+      '--session-id',
+      'new-1',
       '-p',
       '--input-format',
       'stream-json',
@@ -241,16 +328,18 @@ describe('重写注释的命令行参数', () => {
     expect(JSON.parse(COMMENT_SCHEMA)).toEqual({ type: 'object', properties: { body: { type: 'string' } }, required: ['body'], additionalProperties: false })
   })
 
-  it('接着说时 --resume 那次会话，放在 -p 前面；没有 profile 就不带 --settings', () => {
-    const args = rewriteArgs({ pluginRoot: '/plugins/ecc', resume: 's1' })
+  it('接着说时 --resume 那次会话、不带 --session-id，放在 -p 前面；没有 profile 就不带 --settings', () => {
+    const args = rewriteArgs({ pluginRoot: '/plugins/ecc', session: { id: 's1', resume: true } })
     expect(args[0]).toBe('--restricted')
+    expect(args).not.toContain('--session-id')
+    expect(args).not.toContain('--fork-session')
     expect(args.slice(args.indexOf('--resume'), args.indexOf('--resume') + 3)).toEqual(['--resume', 's1', '-p'])
   })
 
-  it('开新会话不带 --resume，会话 id 由 Claude Code 起', () => {
-    const args = rewriteArgs({ pluginRoot: '/plugins/ecc' })
+  it('开新会话不带 --resume，会话 id 用扩展给的（--session-id）', () => {
+    const args = rewriteArgs({ pluginRoot: '/plugins/ecc', session: NEW })
     expect(args).not.toContain('--resume')
-    expect(args).not.toContain('--session-id')
+    expect(argAfter(args, '--session-id')).toBe('new-1')
   })
 })
 
@@ -296,50 +385,87 @@ describe('重写注释问一次', () => {
     return { deps: commentDeps, calls, lookups }
   }
 
-  function comment(overrides: Partial<CommentAsk> = {}): CommentAsk & { events: unknown[] } {
+  /** 一次重写；onSession 记下的会话 id 在 sessions 里 */
+  function comment(overrides: Partial<CommentAsk> = {}): CommentAsk & { events: unknown[], sessions: string[] } {
     const events: unknown[] = []
-    return { prompt: '/ecc:writing-code-comments src/a.py:3-8', images: [], cwd: '/work', signal: new AbortController().signal, onEvent: event => events.push(event), events, ...overrides }
+    const sessions: string[] = []
+    return {
+      prompt: '/ecc:writing-code-comments src/a.py:3-8',
+      images: [],
+      cwd: '/work',
+      signal: new AbortController().signal,
+      onEvent: event => events.push(event),
+      onSession: async (id) => {
+        sessions.push(id)
+      },
+      events,
+      sessions,
+      ...overrides,
+    }
   }
 
-  it('开新会话：带上插件目录和超时；stdin 里是那句提示和贴的图；返回正文和 Claude Code 起的会话 id', async () => {
-    const { deps, calls, lookups } = commentDeps([{ lines: [init('new-1'), structured('按名字找文件。', 'new-1')] }])
+  it('开新会话：带上插件目录、按没动静计时；会话 id 由扩展生成、先记下再起进程；stdin 里是那句提示和贴的图；返回正文', async () => {
+    const { deps, calls, lookups } = commentDeps([{ lines: [init('claude-起的'), structured('按名字找文件。', 'claude-起的')] }])
     const ask = comment({ profilePath: '/p/sonnet.json', images: [PNG] })
-    expect(await askCommentBody(ask, deps)).toEqual({ body: '按名字找文件。', sessionId: 'new-1' })
+    expect(await askCommentBody(ask, deps)).toEqual({ body: '按名字找文件。' })
     expect(lookups).toEqual(['/work'])
-    expect(calls[0].args).toEqual(rewriteArgs({ pluginRoot: '/plugins/ecc', profilePath: '/p/sonnet.json' }))
-    expect(calls[0]).toMatchObject({ cwd: '/work', signal: ask.signal, timeoutMs: REWRITE_TIMEOUT_MS })
+    expect(ask.sessions).toHaveLength(1)
+    expect(ask.sessions[0]).toMatch(UUID)
+    expect(calls[0].args).toEqual(rewriteArgs({ pluginRoot: '/plugins/ecc', profilePath: '/p/sonnet.json', session: { id: ask.sessions[0], resume: false } }))
+    expect(calls[0]).toMatchObject({ cwd: '/work', signal: ask.signal, idleTimeoutMs: REWRITE_IDLE_TIMEOUT_MS })
+    expect(REWRITE_IDLE_TIMEOUT_MS).toBe(10 * 60_000)
     expect(sent(calls[0])).toMatchObject({ text: '/ecc:writing-code-comments src/a.py:3-8', images: [{ source: { data: PNG.base64 } }] })
   })
 
-  it('接着说：--resume 这块最近一次重写的会话，发块现在在哪和用户的话', async () => {
-    const { deps, calls } = commentDeps([{ lines: [structured('短一点。', 's0')] }])
-    expect(await askCommentBody(comment({ followUp: { sessionId: 's0', prompt: 'src/a.py:3-10\n\n短一点' } }), deps)).toEqual({ body: '短一点。', sessionId: 's0' })
-    expect(calls[0].args).toEqual(rewriteArgs({ pluginRoot: '/plugins/ecc', resume: 's0' }))
-    expect(sent(calls[0]).text).toBe('src/a.py:3-10\n\n短一点')
+  it('开新会话：onSession 记好之前不起进程', async () => {
+    const { deps, calls } = commentDeps([{ lines: [structured('新的。')] }])
+    let saved: () => void = () => {}
+    const answer = askCommentBody(comment({
+      onSession: () => new Promise((resolve) => {
+        saved = resolve
+      }),
+    }), deps)
+    await settle()
+    expect(calls).toHaveLength(0)
+    saved()
+    expect(await answer).toEqual({ body: '新的。' })
+    expect(calls).toHaveLength(1)
   })
 
-  it('那次会话找不到了：开新会话按技能命令重新来，图片照样带上', async () => {
+  it('接着说：--resume 这块最近一次重写的会话，发块现在在哪和用户的话，不再记会话', async () => {
+    const { deps, calls } = commentDeps([{ lines: [structured('短一点。', 's0')] }])
+    const ask = comment({ followUp: { sessionId: 's0', prompt: 'src/a.py:3-10\n\n短一点' } })
+    expect(await askCommentBody(ask, deps)).toEqual({ body: '短一点。' })
+    expect(calls[0].args).toEqual(rewriteArgs({ pluginRoot: '/plugins/ecc', session: { id: 's0', resume: true } }))
+    expect(sent(calls[0]).text).toBe('src/a.py:3-10\n\n短一点')
+    expect(ask.sessions).toEqual([])
+  })
+
+  it('那次会话找不到了：生成新的会话 id、记下后按技能命令重新来，图片照样带上', async () => {
     const { deps, calls } = commentDeps([
       { lines: [line({ type: 'result', subtype: 'error_during_execution', is_error: true, errors: ['No conversation found with session ID: s0'], session_id: 's0' })] },
       { lines: [structured('重新写的。', 'new-1')] },
     ])
     const ask = comment({ prompt: '/ecc:writing-code-comments src/a.py:3-10\n\n短一点', images: [PNG], followUp: { sessionId: 's0', prompt: 'src/a.py:3-10\n\n短一点' } })
-    expect(await askCommentBody(ask, deps)).toEqual({ body: '重新写的。', sessionId: 'new-1' })
-    expect(calls[1].args).toEqual(rewriteArgs({ pluginRoot: '/plugins/ecc' }))
+    expect(await askCommentBody(ask, deps)).toEqual({ body: '重新写的。' })
+    expect(ask.sessions).toHaveLength(1)
+    expect(calls[1].args).toEqual(rewriteArgs({ pluginRoot: '/plugins/ecc', session: { id: ask.sessions[0], resume: false } }))
     expect(sent(calls[1])).toMatchObject({ text: '/ecc:writing-code-comments src/a.py:3-10\n\n短一点', images: [{ source: { data: PNG.base64 } }] })
   })
 
-  it('只回了一段话、没交结构化结果：只有会话 id 没有正文；Claude Code 报错、没给结果：抛错，别的失败不重开', async () => {
-    expect(await askCommentBody(comment(), commentDeps([{ lines: [result('我改好了。', 'new-1')] }]).deps)).toEqual({ sessionId: 'new-1' })
+  it('只回了一段话、没交结构化结果：没有正文；Claude Code 报错、没给结果：抛错，别的失败不重开', async () => {
+    expect(await askCommentBody(comment(), commentDeps([{ lines: [result('我改好了。', 'new-1')] }]).deps)).toEqual({})
     await expect(askCommentBody(comment(), commentDeps([{ lines: [line({ type: 'result', is_error: true, result: '额度用完了' })] }]).deps)).rejects.toThrow('额度用完了')
     await expect(askCommentBody(comment(), commentDeps([{ lines: [] }]).deps)).rejects.toThrow('没给出结果')
     const timeout = commentDeps([{ lines: [], error: new ClaudeTimeoutError('超时', '') }, { lines: [structured('不该到这')] }])
-    await expect(askCommentBody(comment({ followUp: { sessionId: 's0', prompt: 'p' } }), timeout.deps)).rejects.toBeInstanceOf(ClaudeTimeoutError)
+    const ask = comment({ followUp: { sessionId: 's0', prompt: 'p' } })
+    await expect(askCommentBody(ask, timeout.deps)).rejects.toBeInstanceOf(ClaudeTimeoutError)
     expect(timeout.calls).toHaveLength(1)
+    expect(ask.sessions).toEqual([])
   })
 
-  it('等太久停掉时说的是没写完', () => {
-    expect(rewriteFailure(new ClaudeTimeoutError('超时', ''))).toBe(`等了 ${REWRITE_TIMEOUT_MS / 60_000} 分钟还没写完，已经停掉。`)
+  it('太久没动静停掉时说清等了多久、能接着写', () => {
+    expect(rewriteFailure(new ClaudeTimeoutError('超时', ''))).toBe('连续 10 分钟没有任何动静，已经停掉。接着说「继续」会从停下的地方接着写。')
     expect(rewriteFailure(new ClaudeError('Claude 退出码非零 (1): 网络断了', ''))).toBe('Claude Code 没答成：Claude 退出码非零 (1): 网络断了')
   })
 })
diff --git a/vscode/src/codeReader/qa/claudeAsk.ts b/vscode/src/codeReader/qa/claudeAsk.ts
index 4d4378f..0d1d0c7 100644
--- a/vscode/src/codeReader/qa/claudeAsk.ts
+++ b/vscode/src/codeReader/qa/claudeAsk.ts
@@ -6,6 +6,7 @@
 import type { ClaudeImage } from '../../cc/spawnClaude'
 import type { CommentEvent } from '../commentRewrite'
 import type { AnswerEvent } from './answerStream'
+import { randomUUID } from 'node:crypto'
 import { buildStreamJsonLine, CLAUDE_MISSING_MSG, ClaudeCancelledError, ClaudeError, ClaudeTimeoutError, runClaudeLines } from '../../cc/spawnClaude'
 import { COMMENT_PLUGIN, COMMENT_SCHEMA, createCommentParser } from '../commentRewrite'
 import { createAnswerParser } from './answerStream'
@@ -13,10 +14,11 @@ import { createAnswerParser } from './answerStream'
 /** 只给读、搜文件的工具。 */
 const READ_ONLY_TOOLS = 'Read,Grep,Glob'
 
-export const ASK_TIMEOUT_MS = 5 * 60_000
+/** 问答只用读、搜的工具，一调就回，连续这么久一行输出都没有就是卡住了；一直有动静就一直等。 */
+export const ASK_IDLE_TIMEOUT_MS = 5 * 60_000
 
-/** 重写注释要读代码、画原型图、导出图片，比问答慢 */
-export const REWRITE_TIMEOUT_MS = 15 * 60_000
+/** 重写注释还会跑 OpenPencil 的 op 画图、导出，一条命令能好几分钟不出声（Claude Code 的 Bash 一条最多等 10 分钟），所以比问答多等一会儿。 */
+export const REWRITE_IDLE_TIMEOUT_MS = 10 * 60_000
 
 /** OpenPencil 装在应用里的命令行（写注释的技能用它画前端组件的原型图） */
 export const OPENPENCIL_CLI = '/Applications/OpenPencil.app/Contents/MacOS/op'
@@ -24,14 +26,25 @@ export const OPENPENCIL_CLI = '/Applications/OpenPencil.app/Contents/MacOS/op'
 /** 写注释的技能存原型的目录，`*` 是功能名（`my-apps`）。权限规则里写成 `Edit(/…)`，开头的 `/` 指 claude 的工作目录（仓库根目录），不是磁盘根目录。 */
 const PROTOTYPE_DIR = 'docs/prototype/*/openpencil'
 
+/** 这一轮用的会话：`resume` 时接着 `id` 那次会话说，否则开一个会话 id 就是 `id` 的新会话（id 由扩展定，见 [inSession]）。 */
+export interface ClaudeSession {
+  id: string
+  resume: boolean
+}
+
+/** 让 claude 用 `session` 这个会话的参数：接着说用 `--resume`，开新会话用 `--session-id`。 */
+function sessionArgs(session: ClaudeSession): string[] {
+  return [session.resume ? '--resume' : '--session-id', session.id]
+}
+
 /**
  * 一次提问的命令行参数；问题连同贴的图片从 stdin 按 stream-json 发（见 askClaude），没贴图也一样。只读靠三层：可用的内置工具只剩读、搜（`--tools`）；这几个不用再批（`--allowedTools`），
  * 别的一律拒绝、不等人批（`--permission-mode dontAsk`，盖过 profile 里的 bypassPermissions）；
  * 不加载任何 MCP 服务（`--strict-mcp-config` 又不给 `--mcp-config`），免得 MCP 工具能改东西。
- * addDirs 是工作目录以外还能读的目录（`--add-dir`）；给了 schema 就按它交结构化结果（`--json-schema`）。
+ * addDirs 是工作目录以外还能读的目录（`--add-dir`）；给了 schema 就按它交结构化结果（`--json-schema`）；session 是这次用的会话（见 [ClaudeSession]）。
  */
-export function askArgs(options: { profilePath?: string, resume?: string, schema?: string, addDirs?: readonly string[] } = {}): string[] {
-  const { profilePath, resume, schema, addDirs = [] } = options
+export function askArgs(options: { profilePath?: string, session: ClaudeSession, schema?: string, addDirs?: readonly string[] }): string[] {
+  const { profilePath, session, schema, addDirs = [] } = options
   return [
     ...(profilePath ? ['--settings', profilePath] : []),
     '--tools',
@@ -42,7 +55,7 @@ export function askArgs(options: { profilePath?: string, resume?: string, schema
     'dontAsk',
     '--strict-mcp-config',
     ...(addDirs.length > 0 ? ['--add-dir', ...addDirs] : []),
-    ...(resume ? ['--resume', resume] : []),
+    ...sessionArgs(session),
     '-p',
     '--input-format',
     'stream-json',
@@ -60,10 +73,10 @@ export function askArgs(options: { profilePath?: string, resume?: string, schema
  * 规则里的 `*` 能跨空格，`mkdir -p docs/prototype/x/openpencil/exports src/y` 也对得上，所以建目录时多跟一个路径的另外拒掉（`--disallowedTools`）。
  * `--restricted` 不读用户、项目的设置文件，那里放行的命令（比如 `git -C`）进不来，文件工具也只认工作目录；
  * 写注释的插件因此要单独加载（`--plugin-dir`），它的目录加进工作目录（`--add-dir`），技能才读得到它的参考文档。
- * 有 resume 就接着那次会话说，没有就开新会话，会话 id 由 Claude Code 起。
+ * session 是这次用的会话（见 [ClaudeSession]）。
  */
-export function rewriteArgs(options: { pluginRoot: string, profilePath?: string, resume?: string }): string[] {
-  const { pluginRoot, profilePath, resume } = options
+export function rewriteArgs(options: { pluginRoot: string, profilePath?: string, session: ClaudeSession }): string[] {
+  const { pluginRoot, profilePath, session } = options
   const allowed = [READ_ONLY_TOOLS, `Bash(${OPENPENCIL_CLI} *)`, `Bash(mkdir -p ${PROTOTYPE_DIR}/exports)`, `Edit(/${PROTOTYPE_DIR}/**)`].join(',')
   return [
     ...(profilePath ? ['--settings', profilePath] : []),
@@ -81,7 +94,7 @@ export function rewriteArgs(options: { pluginRoot: string, profilePath?: string,
     '--permission-mode',
     'dontAsk',
     '--strict-mcp-config',
-    ...(resume ? ['--resume', resume] : []),
+    ...sessionArgs(session),
     '-p',
     '--input-format',
     'stream-json',
@@ -103,19 +116,20 @@ export interface AskRun {
   profilePath?: string
   /** 追问：接着 sessionId 那次会话问 prompt；会话找不到了（过期、被清理）就按完整问题重新开一次 */
   followUp?: { sessionId: string, prompt: string }
+  /** 开新会话前先把扩展给它定的会话 id 交给这里记下，记好了才起进程，所以这一轮没答完也接得上 */
+  onSession: (sessionId: string) => Promise<void>
   cwd: string
   /** cwd 以外还要读的目录（别的工作区文件夹、问的工作区外的库文件所在的目录） */
   addDirs?: string[]
   /** 按这个 JSON Schema 交结构化结果（`--json-schema`）；只要一段话回答时没有 */
   schema?: string
   signal: AbortSignal
-  /** 答的过程中：会话 id、回答长出来的字、正在读什么 */
+  /** 答的过程中：回答长出来的字、正在读什么 */
   onEvent: (event: Exclude<AnswerEvent, { kind: 'result' | 'error' }>) => void
 }
 
 export interface Answer {
   text: string
-  sessionId: string
   /** 要了结构化结果时交回的结构；没要、没交时没有 */
   output?: unknown
 }
@@ -133,24 +147,47 @@ function missingSession(err: unknown): boolean {
 }
 
 /**
- * 问一次，答完返回最终回答（要了结构化结果的连同交回的结构；只交了结构、没说话也算答了）；
- * 失败、超时、被叫停时抛 ClaudeError（及其子类），用 askFailure 换成给人看的话。
+ * 跑一轮对话：有 `followUp` 就接着那次会话发它的话，没有、或那次会话找不到了，就开新会话发完整的 `prompt`。
+ *
+ * 新会话的 id 由扩展当场生成，先等 `onSession` 记下再起进程：进程刚起来就挂了、超时了、被叫停了，下次也能接着这个会话说。
+ *
+ * @param chat 完整的话、接着说时的会话和话、记下新会话 id 的地方
+ * @param once 用给的会话发一次话、等它答完
+ */
+async function inSession<T>(chat: Pick<AskRun, 'prompt' | 'followUp' | 'onSession'>, once: (prompt: string, session: ClaudeSession) => Promise<T>): Promise<T> {
+  if (chat.followUp) {
+    try {
+      return await once(chat.followUp.prompt, { id: chat.followUp.sessionId, resume: true })
+    }
+    catch (err) {
+      if (!missingSession(err))
+        throw err
+    }
+  }
+  const id = randomUUID()
+  await chat.onSession(id)
+  return once(chat.prompt, { id, resume: false })
+}
+
+/**
+ * 问一次，答完返回最终回答（要了结构化结果的连同交回的结构；只交了结构、没说话也算答了）；接着哪次会话问见 [inSession]。
+ * 失败、太久没动静、被叫停时抛 [ClaudeError]（及其子类），用 [askFailure] 换成给人看的话。
  */
 export async function askClaude(run: AskRun, deps: AskDeps = DEFAULT_DEPS): Promise<Answer> {
-  const once = async (prompt: string, resume?: string): Promise<Answer> => {
+  return inSession(run, async (prompt, session) => {
     const parse = createAnswerParser()
     let answer: Answer | undefined
     let failure: string | undefined
     await deps.runLines({
-      args: askArgs({ profilePath: run.profilePath, resume, schema: run.schema, addDirs: run.addDirs }),
+      args: askArgs({ profilePath: run.profilePath, session, schema: run.schema, addDirs: run.addDirs }),
       input: buildStreamJsonLine(prompt, run.images),
       cwd: run.cwd,
       signal: run.signal,
-      timeoutMs: ASK_TIMEOUT_MS,
+      idleTimeoutMs: ASK_IDLE_TIMEOUT_MS,
       onLine: (line) => {
         for (const event of parse(line)) {
           if (event.kind === 'result')
-            answer = { text: event.text, sessionId: event.sessionId, ...(event.output !== undefined && { output: event.output }) }
+            answer = { text: event.text, ...(event.output !== undefined && { output: event.output }) }
           else if (event.kind === 'error')
             failure = event.message
           else
@@ -163,17 +200,7 @@ export async function askClaude(run: AskRun, deps: AskDeps = DEFAULT_DEPS): Prom
     if (!answer || (!answer.text && answer.output === undefined))
       throw new ClaudeError('Claude Code 结束了，但没给出回答', '')
     return answer
-  }
-  if (run.followUp) {
-    try {
-      return await once(run.followUp.prompt, run.followUp.sessionId)
-    }
-    catch (err) {
-      if (!missingSession(err))
-        throw err
-    }
-  }
-  return once(run.prompt)
+  })
 }
 
 export interface CommentAsk {
@@ -184,16 +211,17 @@ export interface CommentAsk {
   profilePath?: string
   /** 接着 sessionId 那次重写的会话发 prompt（块现在在哪和用户的话）；会话找不到了就按上面的 prompt 开新会话 */
   followUp?: { sessionId: string, prompt: string }
+  /** 开新会话前先把扩展给它定的会话 id 交给这里记下，记好了才起进程，所以这一轮没写完也接得上 */
+  onSession: (sessionId: string) => Promise<void>
   cwd: string
   signal: AbortSignal
   /** 重写的过程中：正文写出来的字、正在做什么 */
   onEvent: (event: Extract<CommentEvent, { kind: 'text' | 'activity' }>) => void
 }
 
-/** 重写一次的结果：结构化结果里的注释正文（只回了一段话时没有），这次的会话 id。 */
+/** 重写一次的结果：结构化结果里的注释正文，只回了一段话时没有。 */
 export interface CommentAnswer {
   body?: string
-  sessionId: string
 }
 
 export interface CommentAskDeps extends AskDeps {
@@ -207,25 +235,25 @@ const COMMENT_DEPS: CommentAskDeps = {
 }
 
 /**
- * 「重写注释」问一次：参数见 rewriteArgs，按 COMMENT_SCHEMA 交结构化结果，写回归扩展。有 followUp 就接着那次会话说，会话找不到了按 prompt 开新会话。
- * 返回结果里的注释正文和会话 id；只回了一段话、没交结构化结果时没有正文。失败、超时、被叫停时抛 ClaudeError（及其子类），用 rewriteFailure 换成给人看的话。
+ * 「重写注释」问一次：参数见 [rewriteArgs]，按 [COMMENT_SCHEMA] 交结构化结果，写回归扩展；接着哪次会话说见 [inSession]。
+ * 返回结果里的注释正文；只回了一段话、没交结构化结果时没有正文。失败、太久没动静、被叫停时抛 [ClaudeError]（及其子类），用 [rewriteFailure] 换成给人看的话。
  */
 export async function askCommentBody(ask: CommentAsk, deps: CommentAskDeps = COMMENT_DEPS): Promise<CommentAnswer> {
   const pluginRoot = await deps.pluginRoot(ask.cwd)
-  const once = async (prompt: string, resume?: string): Promise<CommentAnswer> => {
+  return inSession(ask, async (prompt, session) => {
     const parse = createCommentParser()
     let result: CommentAnswer | undefined
     let failure: string | undefined
     await deps.runLines({
-      args: rewriteArgs({ pluginRoot, profilePath: ask.profilePath, resume }),
+      args: rewriteArgs({ pluginRoot, profilePath: ask.profilePath, session }),
       input: buildStreamJsonLine(prompt, ask.images),
       cwd: ask.cwd,
       signal: ask.signal,
-      timeoutMs: REWRITE_TIMEOUT_MS,
+      idleTimeoutMs: REWRITE_IDLE_TIMEOUT_MS,
       onLine: (line) => {
         for (const event of parse(line)) {
           if (event.kind === 'result')
-            result = { ...(event.body !== undefined && { body: event.body }), sessionId: event.sessionId }
+            result = event.body !== undefined ? { body: event.body } : {}
           else if (event.kind === 'error')
             failure = event.message
           else
@@ -238,17 +266,7 @@ export async function askCommentBody(ask: CommentAsk, deps: CommentAskDeps = COM
     if (!result)
       throw new ClaudeError('Claude Code 结束了，但没给出结果', '')
     return result
-  }
-  if (ask.followUp) {
-    try {
-      return await once(ask.followUp.prompt, ask.followUp.sessionId)
-    }
-    catch (err) {
-      if (!missingSession(err))
-        throw err
-    }
-  }
-  return once(ask.prompt)
+  })
 }
 
 /** `claude plugin list --json` 里启用着的 name 插件的目录；没装、没启用、读不出来时没有。 */
@@ -273,7 +291,7 @@ function isRecord(value: unknown): value is Record<string, unknown> {
 /** 写注释的技能所在插件的目录：在 cwd 里问 Claude Code 装了哪些插件。没找到时抛错，说清楚要先装上。 */
 export async function commentPluginRoot(cwd: string, runLines: typeof runClaudeLines = runClaudeLines): Promise<string> {
   const lines: string[] = []
-  await runLines({ args: ['plugin', 'list', '--json'], cwd, onLine: line => lines.push(line), timeoutMs: 30_000 })
+  await runLines({ args: ['plugin', 'list', '--json'], cwd, onLine: line => lines.push(line), idleTimeoutMs: 30_000 })
   const root = pluginRootIn(lines.join('\n'), COMMENT_PLUGIN)
   if (!root)
     throw new ClaudeError(`没找到启用着的 ${COMMENT_PLUGIN} 插件，写注释的技能在它里面：在 Claude Code 里装上并启用后再重写。`, '')
@@ -285,7 +303,7 @@ const AUTH_HINT = /\/login|log ?in|auth|401|403|api key|unauthori[sz]ed|credenti
 /** 问失败了，给人看的一句话。 */
 export function askFailure(err: unknown): string {
   if (err instanceof ClaudeTimeoutError)
-    return `等了 ${Math.round(ASK_TIMEOUT_MS / 60_000)} 分钟还没答完，已经停掉。可以把问题问得具体一点再试。`
+    return idleFailure(ASK_IDLE_TIMEOUT_MS, '做')
   if (err instanceof ClaudeError && err.message === CLAUDE_MISSING_MSG)
     return '没找到 Claude Code（claude 命令）。装好、能在终端里运行 claude 之后再问。'
   const message = err instanceof Error ? err.message : String(err)
@@ -294,9 +312,19 @@ export function askFailure(err: unknown): string {
   return `Claude Code 没答成：${message}`
 }
 
-/** 重写注释失败了，给人看的一句话：超时说的是没写完，别的同 askFailure。 */
+/** 重写注释失败了，给人看的一句话：太久没动静时按重写注释等的时长说，别的同 [askFailure]。 */
 export function rewriteFailure(err: unknown): string {
   if (err instanceof ClaudeTimeoutError)
-    return `等了 ${Math.round(REWRITE_TIMEOUT_MS / 60_000)} 分钟还没写完，已经停掉。`
+    return idleFailure(REWRITE_IDLE_TIMEOUT_MS, '写')
   return askFailure(err)
 }
+
+/**
+ * 太久没动静被停掉时给人看的话：说清等了多久，并告诉人这一轮的会话记着，说「继续」就接着干。
+ *
+ * @param idleTimeoutMs 等了多久没动静（毫秒）
+ * @param doing 接着干的是什么（`做`、`写`）
+ */
+function idleFailure(idleTimeoutMs: number, doing: string): string {
+  return `连续 ${Math.round(idleTimeoutMs / 60_000)} 分钟没有任何动静，已经停掉。接着说「继续」会从停下的地方接着${doing}。`
+}
diff --git a/vscode/src/codeReader/qa/codeQa.test.ts b/vscode/src/codeReader/qa/codeQa.test.ts
index a6f2fce..057698a 100644
--- a/vscode/src/codeReader/qa/codeQa.test.ts
+++ b/vscode/src/codeReader/qa/codeQa.test.ts
@@ -1,4 +1,5 @@
 import type { ExtensionContext, Memento, Uri } from 'vscode'
+import type { runClaudeLines } from '../../cc/spawnClaude'
 import type { AskRunner, CommentAnswer, CommentAsk } from './claudeAsk'
 import type { AskEvent, RewriteEvent, RewriteRequest } from './codeQa'
 import { mkdtempSync, rmSync } from 'node:fs'
@@ -6,9 +7,11 @@ import { tmpdir } from 'node:os'
 import path from 'node:path'
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
 import { listClaudeProfiles } from '../../cc/profiles'
-import { ClaudeCancelledError } from '../../cc/spawnClaude'
+import { ClaudeCancelledError, ClaudeError, ClaudeTimeoutError } from '../../cc/spawnClaude'
 import { getSettings, saveSettings } from '../../settings/store'
+import { askClaude, askCommentBody } from './claudeAsk'
 import { CodeQa } from './codeQa'
+import { parsePathQa, PATH_QA_STATE_KEY } from './pathQa'
 
 vi.mock('vscode', async () => {
   const { EventEmitter } = await import('node:events')
@@ -40,7 +43,9 @@ const places = vi.hoisted(() => {
   const locateQa = (uri: { fsPath: string }) => inWorkspace(uri)
     ? { folder, key: 'a.ts', promptPath: 'a.ts' }
     : { folder, key: libraryKey, promptPath: uri.fsPath, outsideDir: libraryDir }
-  return { folder, libraryDir, libraryKey, inWorkspace, locateQa }
+  /** 每份记录文件（`.spx/code-qa.json` 这些）最近建的那个表，测试直接看里面记了什么 */
+  const stores = new Map<string, { get: (folder: unknown, key: string) => unknown }>()
+  return { folder, libraryDir, libraryKey, inWorkspace, locateQa, stores }
 })
 
 vi.mock('../folderStore', () => ({
@@ -48,6 +53,10 @@ vi.mock('../folderStore', () => ({
   FolderStore: class {
     private readonly maps = new Map<unknown, Record<string, unknown>>()
     readonly onDidChange = () => ({ dispose: () => {} })
+    constructor(file: { path: string }) {
+      places.stores.set(file.path, this)
+    }
+
     get(folder: unknown, key: string) { return this.maps.get(folder)?.[key] }
     async update(folder: unknown, change: (map: Record<string, unknown>) => Record<string, unknown>) {
       this.maps.set(folder, change(this.maps.get(folder) ?? {}))
@@ -175,7 +184,7 @@ describe('问 AI 和重写注释各用各的 profile', () => {
     const ctx = context()
     await saveSettings(ctx, { defaultAskProfilePath: '/p/sonnet.json', defaultRewriteProfilePath: '/p/dsflash.json' })
     const { qa, runner, rewriter } = service(ctx)
-    rewriter.mockResolvedValue({ body: '新的。', sessionId: 'r1' })
+    rewriter.mockResolvedValue({ body: '新的。' })
     await qa.ask(uri, asking('1'))
     await qa.askPath(uri, 'file', { askId: '2', question: '这是什么', images: [] })
     qa.stop('2')
@@ -187,7 +196,7 @@ describe('问 AI 和重写注释各用各的 profile', () => {
 
   it('都没配时两套都用默认的那个', async () => {
     const { qa, runner, rewriter } = service(context())
-    rewriter.mockResolvedValue({ body: '新的。', sessionId: 'r1' })
+    rewriter.mockResolvedValue({ body: '新的。' })
     await qa.ask(uri, asking('1'))
     await qa.rewrite(uri, rewriting('2'))
     expect(runner.mock.calls[0]?.[0].profilePath).toBe('/p/offical.json')
@@ -197,7 +206,7 @@ describe('问 AI 和重写注释各用各的 profile', () => {
   it('临时切换只改自己那一套、只通知自己那一套的下拉，不写进设置', async () => {
     const ctx = context()
     const { qa, runner, rewriter } = service(ctx)
-    rewriter.mockResolvedValue({ body: '新的。', sessionId: 'r1' })
+    rewriter.mockResolvedValue({ body: '新的。' })
     const askShown = vi.fn()
     const rewriteShown = vi.fn()
     qa.profiles.ask.subscribe(askShown)
@@ -260,7 +269,10 @@ describe('重写注释的记录', () => {
   it('答完就记在重写记录里、不进问答：写进文件的记正文；接着说时接这块最近一次重写的会话，写回失败也记下原因', async () => {
     const ctx = context()
     const { qa, runner, rewriter } = service(ctx)
-    rewriter.mockResolvedValueOnce({ body: '按名字找。', sessionId: 'r1' })
+    rewriter.mockImplementationOnce(async (ask) => {
+      await ask.onSession('r1')
+      return { body: '按名字找。' }
+    })
     const first = ended(qa, '1')
     expect(await qa.rewrite(uri, request('1'))).toBeUndefined()
     expect(rewriter.mock.calls[0][0]).toMatchObject({ prompt: SKILL, cwd: '/workspace', images: [] })
@@ -269,7 +281,7 @@ describe('重写注释的记录', () => {
     expect(rewritesOf(qa)).toEqual([{ anchor: 'function f', entries: [expect.objectContaining({ question: SKILL, answer: '按名字找。', id: (await first).entryId })] }])
     expect(qa.view(uri, file => file.fsPath, 'file').threads).toEqual([])
 
-    rewriter.mockResolvedValueOnce({ body: '短的。', sessionId: 'r1' })
+    rewriter.mockResolvedValueOnce({ body: '短的。' })
     const writeBack = vi.fn(async () => '编辑器没接受这次修改，没有写回。')
     const second = ended(qa, '2')
     await qa.rewrite(uri, request('2', { question: '短一点', prompt: `${SKILL}\n\n短一点`, followUp: 'a.ts:1-5\n\n短一点', writeBack }))
@@ -288,11 +300,11 @@ describe('重写注释的记录', () => {
   it('点按钮从头重写（不带 followUp）开新会话；模型没交回正文也记下原因', async () => {
     const ctx = context()
     const { qa, rewriter } = service(ctx)
-    rewriter.mockResolvedValueOnce({ body: '旧的。', sessionId: 'r1' })
+    rewriter.mockResolvedValueOnce({ body: '旧的。' })
     const first = ended(qa, '1')
     await qa.rewrite(uri, request('1'))
     await first
-    rewriter.mockResolvedValueOnce({ sessionId: 'r2' })
+    rewriter.mockResolvedValueOnce({})
     const second = ended(qa, '2')
     await qa.rewrite(uri, request('2', { writeBack: async body => body === undefined ? '模型没有按要求交回注释正文，没有改文件。' : undefined }))
     expect(rewriter.mock.calls[1][0]).not.toHaveProperty('followUp')
@@ -334,7 +346,7 @@ describe('重写注释的记录', () => {
     rewriter.mockImplementationOnce(() => new Promise((resolve) => {
       finishFirst = resolve
     }))
-    rewriter.mockResolvedValueOnce({ body: '第二段。', sessionId: 'r2' })
+    rewriter.mockResolvedValueOnce({ body: '第二段。' })
     const other = { fsPath: '/workspace/b.ts', toString: () => 'file:///workspace/b.ts' } as Uri
     const events: RewriteEvent[] = []
     qa.onDidRewrite(event => events.push(event))
@@ -350,7 +362,7 @@ describe('重写注释的记录', () => {
     expect(runner).toHaveBeenCalledTimes(2)
 
     const second = ended(qa, '2')
-    finishFirst({ body: '第一段。', sessionId: 'r1' })
+    finishFirst({ body: '第一段。' })
     expect((await second).end).toEqual({ status: 'done', body: '第二段。' })
     expect(rewriter).toHaveBeenCalledTimes(2)
     expect(writeBack).toHaveBeenCalledWith('第二段。')
@@ -387,17 +399,20 @@ describe('顶部聊天要结构化结果的一轮（了解一块代码）', () =
   it('带上 schema 和加进来的目录；答完交给 settle，记下它给的回答；下一轮接着最近一次的会话说', async () => {
     const { qa, runner } = setup()
     const output = { groups: [] }
-    runner.mockResolvedValueOnce({ text: '找到了。', sessionId: 's1', output })
+    runner.mockImplementationOnce(async (ask) => {
+      await ask.onSession('s1')
+      return { text: '找到了。', output }
+    })
     const settle = vi.fn(async () => ({ text: '整理好的回答' }))
     const first = ended(qa, '1')
     expect(await qa.askTop(uri, { askId: '1', question: '用户登录', images: [] }, run, settle)).toBeUndefined()
     expect(runner.mock.calls[0][0]).toMatchObject({ prompt: '完整的话', schema: '{"type":"object"}', addDirs: ['/ws/server'], cwd: '/workspace' })
     expect(runner.mock.calls[0][0]).not.toHaveProperty('followUp')
-    expect((await first).end).toEqual({ status: 'done', answer: { text: '整理好的回答', sessionId: 's1', output } })
-    expect(settle).toHaveBeenCalledWith({ text: '找到了。', sessionId: 's1', output })
+    expect((await first).end).toEqual({ status: 'done', answer: { text: '整理好的回答', output } })
+    expect(settle).toHaveBeenCalledWith({ text: '找到了。', output })
     expect(historyOf(qa)).toEqual([expect.objectContaining({ question: '用户登录', answer: '整理好的回答' })])
 
-    runner.mockResolvedValueOnce({ text: '', sessionId: 's1', output })
+    runner.mockResolvedValueOnce({ text: '', output })
     const second = ended(qa, '2')
     await qa.askTop(uri, { askId: '2', question: '还漏了续费失败重试', images: [] }, run, settle)
     await second
@@ -407,7 +422,7 @@ describe('顶部聊天要结构化结果的一轮（了解一块代码）', () =
 
   it('settle 说结构不合格：这一轮算失败、说清原因，不记', async () => {
     const { qa, runner } = setup()
-    runner.mockResolvedValueOnce({ text: '只说了话', sessionId: 's1' })
+    runner.mockResolvedValueOnce({ text: '只说了话' })
     const failed = ended(qa, '1')
     await qa.askTop(uri, { askId: '1', question: '用户登录', images: [] }, run, async () => ({ error: 'AI 没按要求的结构交回结果（只回了一段话）。' }))
     expect((await failed).end).toEqual({ status: 'failed', error: 'AI 没按要求的结构交回结果（只回了一段话）。' })
@@ -418,7 +433,7 @@ describe('顶部聊天要结构化结果的一轮（了解一块代码）', () =
 
   it('删掉这一页的全部问答：记下的没了，正在问的叫停', async () => {
     const { qa, runner } = setup()
-    runner.mockResolvedValueOnce({ text: '', sessionId: 's1', output: {} })
+    runner.mockResolvedValueOnce({ text: '', output: {} })
     const first = ended(qa, '1')
     await qa.askTop(uri, { askId: '1', question: '用户登录', images: [] }, run, async () => ({ text: '回答' }))
     await first
@@ -455,7 +470,7 @@ describe('工作区外的库文件（⌘ 点进去的标准库源码）', () =>
 
   it('问一块：claude 在第一个工作区文件夹里跑、另外放行读库文件所在的目录；答完记进那个文件夹的表，再看能看到这条', async () => {
     const { qa, runner } = service(context())
-    runner.mockResolvedValueOnce({ text: '按通配符递归找。', sessionId: 's1' })
+    runner.mockResolvedValueOnce({ text: '按通配符递归找。' })
     const done = answered(qa, '1')
     expect(await qa.ask(library, { askId: '1', anchor: 'function rglob', question: '怎么找的', prompt: '完整的', followUp: '短的', images: [] })).toBeUndefined()
     expect(runner.mock.calls[0][0]).toMatchObject({ cwd: '/workspace', addDirs: [places.libraryDir] })
@@ -478,3 +493,186 @@ describe('工作区外的库文件（⌘ 点进去的标准库源码）', () =>
     expect(rewriter).not.toHaveBeenCalled()
   })
 })
+
+describe('没答完的那一轮也记着会话：接着说「继续」就接着它做', () => {
+  type RunLinesOptions = Parameters<typeof runClaudeLines>[0]
+  /** 假的 claude 每次起来干什么：吐出这些行（给了 error 再抛它），或一直不出声、等人叫停 */
+  type Step = { lines: string[], error?: Error } | 'hang'
+
+  const ANCHOR = 'function f'
+  const SKILL = '/ecc:writing-code-comments a.ts:1-3'
+  /** topQaLocation 的替身给 a.ts 的键 */
+  const TOP_KEY = 'file:///workspace\na.ts'
+  const UUID = /^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/
+  const answerLine = (text: string): string => JSON.stringify({ type: 'result', subtype: 'success', is_error: false, result: text })
+  const structuredLine = (output: unknown): string => JSON.stringify({ type: 'result', subtype: 'success', is_error: false, result: JSON.stringify(output), structured_output: output })
+  const notFound = (id: string): ClaudeError => new ClaudeError(`Claude 退出码非零 (1): No conversation found with session ID: ${id}`, '')
+  const argAfter = (args: string[], flag: string): string | undefined => args.includes(flag) ? args[args.indexOf(flag) + 1] : undefined
+  const sentText = (call: RunLinesOptions): string => (JSON.parse(call.input ?? '') as { message: { content: { text: string }[] } }).message.content[0].text
+  /** 块下面这块在 path 那份记录文件里记着的会话 */
+  const blockSession = (path: string) => (): string | undefined =>
+    (places.stores.get(path)?.get(places.folder, 'a.ts') as { anchor: string, session?: string }[] | undefined)?.find(thread => thread.anchor === ANCHOR)?.session
+
+  /**
+   * 问 AI、重写注释都走真的 askClaude、askCommentBody，只把起 claude 换成按 steps 来的假的。
+   * atStart 是每次起进程那一刻这一处记着的会话（recorded 读出来的）。
+   */
+  function setup(steps: Step[], recorded: (values: Map<string, unknown>) => string | undefined) {
+    const values = new Map<string, unknown>()
+    const memento = { get: <T>(key: string) => values.get(key) as T, update: async (key: string, value: unknown) => void values.set(key, value) }
+    const calls: RunLinesOptions[] = []
+    const atStart: (string | undefined)[] = []
+    const runLines = async (options: RunLinesOptions): Promise<void> => {
+      const step = steps[calls.length]
+      calls.push(options)
+      atStart.push(recorded(values))
+      if (step === 'hang') {
+        await new Promise<void>((_resolve, reject) => {
+          options.signal?.addEventListener('abort', () => reject(new ClaudeCancelledError('')))
+        })
+        return
+      }
+      step.lines.forEach(options.onLine)
+      if (step.error)
+        throw step.error
+    }
+    const qa = new CodeQa(context(), memento, run => askClaude(run, { runLines }), ask => askCommentBody(ask, { runLines, pluginRoot: async () => '/plugins/ecc' }))
+    services.push(qa)
+    return { qa, calls, atStart }
+  }
+
+  function answered(qa: CodeQa, askId: string): Promise<Extract<AskEvent, { kind: 'end' }>> {
+    return new Promise((resolve) => {
+      qa.onDidAnswer((event) => {
+        if (event.kind === 'end' && event.ask.askId === askId)
+          resolve(event)
+      })
+    })
+  }
+
+  function rewritten(qa: CodeQa, askId: string): Promise<Extract<RewriteEvent, { kind: 'end' }>> {
+    return new Promise((resolve) => {
+      qa.onDidRewrite((event) => {
+        if (event.kind === 'end' && event.ask.askId === askId)
+          resolve(event)
+      })
+    })
+  }
+
+  const block = (askId: string, question: string, followUp: string) => ({ askId, anchor: ANCHOR, question, prompt: `带代码的完整问题：${question}`, followUp, images: [] })
+
+  it('块下面问：会话 id 起进程前就记下；太久没动静停掉后说「继续吧」，--resume 同一个会话、发的是这句话；答成的照常记下，再问还接着它', async () => {
+    const { qa, calls, atStart } = setup([
+      { lines: [], error: new ClaudeTimeoutError('Claude 连续 300s 没有输出', '') },
+      { lines: [answerLine('接着找完了')] },
+      { lines: [answerLine('又答了')] },
+    ], blockSession('.spx/code-qa.json'))
+    const first = answered(qa, '1')
+    await qa.ask(uri, block('1', '用户是如何跟 code agent 聊天的', '短的问题'))
+    expect((await first).end).toEqual({ status: 'failed', error: '连续 5 分钟没有任何动静，已经停掉。接着说「继续」会从停下的地方接着做。' })
+    const id = argAfter(calls[0].args, '--session-id')
+    expect(id).toMatch(UUID)
+    expect(atStart[0]).toBe(id)
+    expect(sentText(calls[0])).toBe('带代码的完整问题：用户是如何跟 code agent 聊天的')
+
+    const second = answered(qa, '2')
+    await qa.ask(uri, block('2', '继续吧', '继续吧'))
+    expect((await second).end).toEqual({ status: 'done', answer: { text: '接着找完了' } })
+    expect(argAfter(calls[1].args, '--resume')).toBe(id)
+    expect(calls[1].args).not.toContain('--session-id')
+    expect(sentText(calls[1])).toBe('继续吧')
+    expect(qa.view(uri, file => file.fsPath, 'file').threads).toEqual([{ anchor: ANCHOR, entries: [expect.objectContaining({ question: '继续吧', answer: '接着找完了' })] }])
+
+    const third = answered(qa, '3')
+    await qa.ask(uri, block('3', '那会话存哪', '那会话存哪'))
+    await third
+    expect(argAfter(calls[2].args, '--resume')).toBe(id)
+    expect(sentText(calls[2])).toBe('那会话存哪')
+  })
+
+  it('顶部问文件：被用户停掉后说「继续吧」，--resume 同一个会话、发接着问的话；没答完的那一轮不进记录', async () => {
+    const { qa, calls, atStart } = setup(['hang', { lines: [answerLine('说完了')] }], values => parsePathQa(values.get(PATH_QA_STATE_KEY))[TOP_KEY]?.session)
+    const first = answered(qa, '1')
+    await qa.askPath(uri, 'file', { askId: '1', question: '这是什么', images: [] })
+    await vi.waitFor(() => expect(calls).toHaveLength(1))
+    qa.stop('1')
+    expect((await first).end).toEqual({ status: 'stopped' })
+    const id = argAfter(calls[0].args, '--session-id')
+    expect(id).toMatch(UUID)
+    expect(atStart[0]).toBe(id)
+
+    const second = answered(qa, '2')
+    await qa.askPath(uri, 'file', { askId: '2', question: '继续吧', images: [] })
+    expect((await second).end.status).toBe('done')
+    expect(argAfter(calls[1].args, '--resume')).toBe(id)
+    expect(sentText(calls[1])).toMatch(/^接着问（还是 a\.ts 这个文件，需要时重新读）：继续吧/)
+    expect(qa.view(uri, file => file.fsPath, 'file').path.map(entry => [entry.question, entry.answer])).toEqual([['继续吧', '说完了']])
+  })
+
+  it('了解一块代码：Claude Code 出错后接着说，--resume 同一个会话、发接着说的话', async () => {
+    const { qa, calls } = setup([
+      { lines: [], error: new ClaudeError('Claude 退出码非零 (1): 网络断了', '') },
+      { lines: [structuredLine({ groups: [] })] },
+    ], () => undefined)
+    const run = { prompt: '完整的要求', followUp: '接着说的话', schema: '{"type":"object"}' }
+    const first = answered(qa, '1')
+    await qa.askTop(uri, { askId: '1', question: '用户登录', images: [] }, run, async () => ({ text: '整理好的回答' }))
+    expect((await first).end).toEqual({ status: 'failed', error: 'Claude Code 没答成：Claude 退出码非零 (1): 网络断了' })
+    const id = argAfter(calls[0].args, '--session-id')
+
+    const second = answered(qa, '2')
+    await qa.askTop(uri, { askId: '2', question: '继续', images: [] }, run, async () => ({ text: '整理好的回答' }))
+    expect((await second).end.status).toBe('done')
+    expect(argAfter(calls[1].args, '--resume')).toBe(id)
+    expect(sentText(calls[1])).toBe('接着说的话')
+  })
+
+  it('重写注释：太久没动静停掉后接着说，--resume 同一个会话、发块在哪和用户的话，写回交回的正文', async () => {
+    const { qa, calls, atStart } = setup([
+      { lines: [], error: new ClaudeTimeoutError('Claude 连续 600s 没有输出', '') },
+      { lines: [structuredLine({ body: '按名字找文件。' })] },
+    ], blockSession('.spx/comment-rewrites.json'))
+    const writeBack = vi.fn(async () => undefined)
+    const first = rewritten(qa, '1')
+    await qa.rewrite(uri, { askId: '1', anchor: ANCHOR, question: SKILL, prompt: SKILL, images: [], writeBack })
+    expect((await first).end).toEqual({ status: 'failed', error: '连续 10 分钟没有任何动静，已经停掉。接着说「继续」会从停下的地方接着写。' })
+    const id = argAfter(calls[0].args, '--session-id')
+    expect(id).toMatch(UUID)
+    expect(atStart[0]).toBe(id)
+    expect(writeBack).not.toHaveBeenCalled()
+
+    const second = rewritten(qa, '2')
+    await qa.rewrite(uri, { askId: '2', anchor: ANCHOR, question: '继续', prompt: `${SKILL}\n\n继续`, followUp: 'a.ts:1-3\n\n继续', images: [], writeBack })
+    expect((await second).end).toEqual({ status: 'done', body: '按名字找文件。' })
+    expect(argAfter(calls[1].args, '--resume')).toBe(id)
+    expect(sentText(calls[1])).toBe('a.ts:1-3\n\n继续')
+    expect(writeBack).toHaveBeenCalledWith('按名字找文件。')
+  })
+
+  it('记着的会话找不到了：生成新会话 id、起进程前记下，按完整问题重开；之后接着新的这个', async () => {
+    const steps: Step[] = ['hang']
+    const { qa, calls, atStart } = setup(steps, blockSession('.spx/code-qa.json'))
+    const first = answered(qa, '1')
+    await qa.ask(uri, block('1', '怎么聊天', '短的'))
+    await vi.waitFor(() => expect(calls).toHaveLength(1))
+    qa.stop('1')
+    await first
+    const lost = argAfter(calls[0].args, '--session-id') ?? ''
+    steps.push({ lines: [], error: notFound(lost) }, { lines: [answerLine('重新答了')] }, { lines: [answerLine('接着答')] })
+
+    const second = answered(qa, '2')
+    await qa.ask(uri, block('2', '继续吧', '继续吧'))
+    expect((await second).end.status).toBe('done')
+    expect(argAfter(calls[1].args, '--resume')).toBe(lost)
+    const fresh = argAfter(calls[2].args, '--session-id')
+    expect(fresh).toMatch(UUID)
+    expect(fresh).not.toBe(lost)
+    expect(atStart[2]).toBe(fresh)
+    expect(sentText(calls[2])).toBe('带代码的完整问题：继续吧')
+
+    const third = answered(qa, '3')
+    await qa.ask(uri, block('3', '再问', '再问'))
+    await third
+    expect(argAfter(calls[3].args, '--resume')).toBe(fresh)
+  })
+})
diff --git a/vscode/src/codeReader/qa/codeQa.ts b/vscode/src/codeReader/qa/codeQa.ts
index cbe9ce0..0efdcb1 100644
--- a/vscode/src/codeReader/qa/codeQa.ts
+++ b/vscode/src/codeReader/qa/codeQa.ts
@@ -1,12 +1,12 @@
 import type { Event, ExtensionContext, Memento } from 'vscode'
 import type { ClaudeProfile } from '../../cc/profiles'
 import type { ClaudeImage } from '../../cc/spawnClaude'
-import type { ChatKind, QaEntryView, QaMessage } from '../editor/messages'
+import type { ChatKind, QaEntryView, QaMessage, QaThreadView } from '../editor/messages'
 import type { PathSubject, TopSubject } from '../editor/pathPreview'
 import type { PathLocation, QaLocation } from '../folderStore'
 import type { AskEnd, RunningAsk } from './asks'
 import type { Answer, AskRunner, CommentAnswer, CommentAsk } from './claudeAsk'
-import type { ChatEntry, QaEntry, RewriteEntry } from './qaMap'
+import type { ChatEntry, QaEntry, QaThread, RewriteEntry } from './qaMap'
 import { randomUUID } from 'node:crypto'
 import { Disposable, EventEmitter, Uri, window } from 'vscode'
 import { getSettings, onDidChangeSettings } from '../../settings/store'
@@ -17,9 +17,9 @@ import { QaAsks, REWRITE_POLICY } from './asks'
 import { askClaude, askCommentBody } from './claudeAsk'
 import { describePath } from './pathAskDescribe'
 import { pathAskFollowUp, pathAskPrompt } from './pathAskPrompt'
-import { parsePathQa, PATH_ASK_ANCHOR, PATH_QA_STATE_KEY, pathQaEntries, withoutPathQa, withoutPathQaKey, withPathQa } from './pathQa'
+import { parsePathQa, PATH_ASK_ANCHOR, PATH_QA_STATE_KEY, pathQaEntries, pathQaSession, withoutPathQa, withoutPathQaKey, withPathQa, withPathSession } from './pathQa'
 import { isQaImageType, QA_IMAGE_DIR, removeQaImages, writeQaImages } from './qaImages'
-import { latestSession, QA_FILE, REWRITE_FILE, withEntry, withoutEntry } from './qaMap'
+import { latestSession, QA_FILE, REWRITE_FILE, withEntry, withoutEntry, withSession } from './qaMap'
 
 /** 问 AI 开不了：问答记在工作区文件夹里，一个都没打开时没地方存。 */
 const NO_QA_HOME = '没打开工作区文件夹，问答没地方存。'
@@ -97,14 +97,13 @@ function viewEntry(root: Uri | undefined, imageUrl: (file: Uri) => string, entry
 }
 
 /** 答完的一轮共有的几项：起 id、把带的图片写进 `<rootPath>/.spx/code-qa/`。图片写不进时抛错。 */
-async function chatEntry(rootPath: string, question: string, sessionId: string, profile: ClaudeProfile | undefined, images: readonly ClaudeImage[]): Promise<ChatEntry> {
+async function chatEntry(rootPath: string, question: string, profile: ClaudeProfile | undefined, images: readonly ClaudeImage[]): Promise<ChatEntry> {
   const id = randomUUID()
   const names = await writeQaImages(rootPath, id, images)
   return {
     id,
     question,
     createdAt: new Date().toISOString(),
-    sessionId,
     ...(profile && { profile: profile.name }),
     ...(names.length > 0 && { images: names }),
   }
@@ -115,6 +114,11 @@ function outsideDirs(at: QaLocation): { addDirs?: string[] } {
   return at.outsideDir === undefined ? {} : { addDirs: [at.outsideDir] }
 }
 
+/** 发给预览的各块记录：只画有记录的块，只记着会话、一次都还没记下的块没东西可画。 */
+function threadViews<E extends ChatEntry>(threads: readonly QaThread<E>[], show: (entry: E) => QaEntryView): QaThreadView[] {
+  return threads.flatMap(({ anchor, entries }) => entries.length > 0 ? [{ anchor, entries: entries.map(show) }] : [])
+}
+
 /**
  * 块下面的对话：问 AI 和重写注释，各自记在各工作区文件夹的一份文件里（`.spx/code-qa.json`、`.spx/comment-rewrites.json`；
  * 改名、删文件、外部改动的跟随同文件注释，见 FolderStore），挂在块的位置记号上，各自接着自己最近一次的会话。
@@ -197,10 +201,10 @@ export class CodeQa implements Disposable {
       available: top !== undefined,
       rewritable: rewriteAt !== undefined,
       subject,
-      threads: threads.map(({ anchor, entries }) => ({ anchor, entries: entries.map(show) })),
+      threads: threadViews(threads, show),
       path: pathEntries.map(show),
       current: this.asks.currentFor(uri.toString()),
-      rewrites: rewrites.map(({ anchor, entries }) => ({ anchor, entries: entries.map(showRewrite) })),
+      rewrites: threadViews(rewrites, showRewrite),
       rewriteCurrent: this.rewrites.currentFor(uri.toString()),
     }
   }
@@ -208,7 +212,8 @@ export class CodeQa implements Disposable {
   /**
    * 开始问；问不了时返回原因（给人看的话）。在问答记着的工作区文件夹里跑 claude（见 [locateQa]），它读得到整个项目；
    * 问的是工作区外的库文件时另外放行读库文件所在的目录。
-   * 这块问过的就接着最近一次的会话问（收起再展开、重启 VS Code 都一样），没问过就带上代码上下文开新会话。
+   * 这块开过会话就接着最近一次的会话问（没答完就超时、出错、被叫停的那次也算；收起再展开、重启 VS Code 都一样），没开过就带上代码上下文开新会话，
+   * 新会话的 id 起进程前就记在这块上（见 [withSession]）。
    * 用问 AI 眼下选的 profile；和那次会话开头用的不一样也照样接着问（`--resume` 和 `--settings` 能一起用）。
    * 带的图片随问题发，答成了才写进 `.spx/code-qa/`、记在这条上；没答成不留文件。
    */
@@ -224,6 +229,7 @@ export class CodeQa implements Disposable {
       prompt,
       images,
       ...(sessionId && { followUp: { sessionId, prompt: followUp } }),
+      onSession: (session: string) => this.store.update(at.folder, map => withSession(map, at.key, anchor, session)),
       ...(profile && { profilePath: profile.path }),
       cwd: at.folder.uri.fsPath,
       ...outsideDirs(at),
@@ -237,7 +243,7 @@ export class CodeQa implements Disposable {
         }
         let entry: QaEntry
         try {
-          const { id, question: asked, ...rest } = await chatEntry(at.folder.uri.fsPath, question, end.answer.sessionId, profile, images)
+          const { id, question: asked, ...rest } = await chatEntry(at.folder.uri.fsPath, question, profile, images)
           entry = { id, question: asked, answer: end.answer.text, ...rest }
         }
         catch (err) {
@@ -253,8 +259,9 @@ export class CodeQa implements Disposable {
 
   /**
    * 重写一段注释；开不了时返回原因（给人看的话）。在工作区文件夹里跑 claude（见 [askCommentBody]），用重写注释眼下选的 profile。
-   * 带 followUp 时接着这块最近一次重写的会话说（和问答的会话分开），没重写过就开新会话；不带时（点按钮）总是开新会话。
-   * 模型答完先写回文件，再把这一轮记下：用户的话、交回的正文、没写进文件的原因、会话 id、profile、图片。Claude Code 报错、被叫停的不记，文件不动。
+   * 带 followUp 时接着这块最近一次重写的会话说（和问答的会话分开，没写完就停掉的那次也算），没重写过就开新会话；不带时（点按钮）总是开新会话。
+   * 新会话的 id 起进程前就记在这块上。模型答完先写回文件，再把这一轮记下：用户的话、交回的正文、没写进文件的原因、profile、图片。
+   * Claude Code 报错、太久没动静、被叫停的这一轮不记，文件不动，只有会话记着能接着说。
    */
   async rewrite(uri: Uri, request: RewriteRequest): Promise<string | undefined> {
     const ready = await this.prepare(locate(uri), request.images, 'rewrite')
@@ -268,6 +275,7 @@ export class CodeQa implements Disposable {
       prompt,
       images,
       ...(sessionId && followUp !== undefined && { followUp: { sessionId, prompt: followUp } }),
+      onSession: (session: string) => this.rewriteStore.update(at.folder, map => withSession(map, at.key, anchor, session)),
       ...(profile && { profilePath: profile.path }),
       cwd: at.folder.uri.fsPath,
     }
@@ -282,7 +290,7 @@ export class CodeQa implements Disposable {
         const error = await writeBack(body)
         let entry: RewriteEntry
         try {
-          const { id, question: said, ...rest } = await chatEntry(at.folder.uri.fsPath, question, end.answer.sessionId, profile, images)
+          const { id, question: said, ...rest } = await chatEntry(at.folder.uri.fsPath, question, profile, images)
           entry = { id, question: said, ...(body !== undefined && { body }), ...(error !== undefined && { error }), ...rest }
         }
         catch (err) {
@@ -350,8 +358,9 @@ export class CodeQa implements Disposable {
 
   /**
    * 在 subject 这一页的顶部问一轮（文件、文件夹、「了解一块代码」的功能，记在哪见 [topQaLocation]），用问 AI 眼下选的 profile；问不了、进行中再问时返回给人看的原因。
-   * 问过的接着最近一次的会话说 run.followUp，没问过、会话找不到了发 run.prompt；要结构化结果时带上 run.schema，别的目录要读时带上 run.addDirs。
-   * 答完交给 settle：它给出这一轮记下的回答，或说交回的不合格（这一轮算没答成）。答成了记在 workspaceState 里，带的图片写进 `.spx/code-qa/`；没答成不记。
+   * 开过会话的接着最近一次的会话说 run.followUp（没答成的那次也算），没开过、会话找不到了发 run.prompt，新会话的 id 起进程前就记下；
+   * 要结构化结果时带上 run.schema，别的目录要读时带上 run.addDirs。
+   * 答完交给 settle：它给出这一轮记下的回答，或说交回的不合格（这一轮算没答成）。答成了记在 workspaceState 里，带的图片写进 `.spx/code-qa/`；没答成的这一轮不记，只有会话记着。
    */
   async askTop(subject: Uri, request: TopRequest, run: TopRun, settle: (answer: Answer) => Promise<{ text: string } | { error: string }>): Promise<string | undefined> {
     const top = topQaLocation(subject)
@@ -368,7 +377,7 @@ export class CodeQa implements Disposable {
       return err instanceof Error ? err.message : String(err)
     }
     const owner = subject.toString()
-    const sessionId = pathQaEntries(this.pathMap(), top.key).at(-1)?.sessionId
+    const sessionId = pathQaSession(this.pathMap(), top.key)
     return this.asks.start({
       owner,
       askId,
@@ -378,6 +387,9 @@ export class CodeQa implements Disposable {
         prompt: run.prompt,
         images,
         ...(sessionId && { followUp: { sessionId, prompt: run.followUp } }),
+        onSession: session => this.enqueuePath(async () => {
+          await this.paths.update(PATH_QA_STATE_KEY, withPathSession(this.pathMap(), top.key, session))
+        }),
         ...(profile && { profilePath: profile.path }),
         cwd: top.folder.uri.fsPath,
         ...(run.schema !== undefined && { schema: run.schema }),
@@ -398,7 +410,7 @@ export class CodeQa implements Disposable {
         }
         let entry: QaEntry
         try {
-          const { id, question: asked, ...rest } = await chatEntry(top.folder.uri.fsPath, question, end.answer.sessionId, profile, images)
+          const { id, question: asked, ...rest } = await chatEntry(top.folder.uri.fsPath, question, profile, images)
           entry = { id, question: asked, answer: settled.text, ...rest }
         }
         catch (err) {
diff --git a/vscode/src/codeReader/qa/pathQa.test.ts b/vscode/src/codeReader/qa/pathQa.test.ts
index 791e4f1..264f4f7 100644
--- a/vscode/src/codeReader/qa/pathQa.test.ts
+++ b/vscode/src/codeReader/qa/pathQa.test.ts
@@ -1,9 +1,9 @@
 import type { QaEntry } from './qaMap'
 import { describe, expect, it } from 'vitest'
-import { parsePathQa, pathQaEntries, pathQaKey, relativeQaKey, withoutPathQa, withPathQa } from './pathQa'
+import { parsePathQa, pathQaEntries, pathQaKey, pathQaSession, relativeQaKey, withoutPathQa, withoutPathQaKey, withPathQa, withPathSession } from './pathQa'
 
 function entry(id: string): QaEntry {
-  return { id, question: `问 ${id}`, answer: `答 ${id}`, createdAt: '2026-10-02T00:00:00.000Z', sessionId: `s-${id}` }
+  return { id, question: `问 ${id}`, answer: `答 ${id}`, createdAt: '2026-10-02T00:00:00.000Z' }
 }
 
 const FOLDER = 'file:///work/app'
@@ -25,6 +25,33 @@ describe('顶部问答按路径记', () => {
     expect(pathQaEntries(stored, DIR).map(item => item.id)).toEqual(['d'])
   })
 
+  it('会话单记：开新会话前记下，后开的盖掉先前的，记问答不动它；一次都没答成也留着、读得回来', () => {
+    let map = withPathSession({}, FILE, 's-1')
+    expect(pathQaSession(map, FILE)).toBe('s-1')
+    expect(pathQaEntries(map, FILE)).toEqual([])
+    map = withPathQa(map, FILE, entry('1'))
+    expect(pathQaSession(map, FILE)).toBe('s-1')
+    map = withPathSession(map, FILE, 's-2')
+    expect(pathQaSession(map, FILE)).toBe('s-2')
+    expect(pathQaEntries(map, FILE).map(item => item.id)).toEqual(['1'])
+    expect(pathQaSession(map, DIR)).toBeUndefined()
+    const again = parsePathQa(JSON.parse(JSON.stringify({ ...map, [DIR]: { entries: [], session: 's-dir' } })))
+    expect(again).toEqual({ [FILE]: { entries: [entry('1')], session: 's-2' }, [DIR]: { entries: [], session: 's-dir' } })
+  })
+
+  it('删掉一条会话照旧接着；问光了、整个删掉时会话也不接了', () => {
+    const map = withPathSession(withPathQa(withPathQa({}, FILE, entry('1')), FILE, entry('2')), FILE, 's-1')
+    const once = withoutPathQa(map, FILE, '2')
+    expect(pathQaSession(once, FILE)).toBe('s-1')
+    expect(withoutPathQa(once, FILE, '1')).toEqual({})
+    expect(withoutPathQaKey(map, FILE)).toEqual({})
+  })
+
+  it('旧版本存的是光一串问答：读进来时接着最后一条的会话 id', () => {
+    const old = { [FILE]: [{ ...entry('1'), sessionId: 's-old' }, { ...entry('2'), sessionId: 's-last' }], [DIR]: [{ ...entry('d'), sessionId: '' }] }
+    expect(parsePathQa(old)).toEqual({ [FILE]: { entries: [entry('1'), entry('2')], session: 's-last' }, [DIR]: { entries: [entry('d')] } })
+  })
+
   it('工作区根是空相对路径，走不出去的路径没有键', () => {
     expect(relativeQaKey('/work/app', '/work/app')).toBe('')
     expect(relativeQaKey('/work/app', '/work/app/src/main.ts')).toBe('src/main.ts')
diff --git a/vscode/src/codeReader/qa/pathQa.ts b/vscode/src/codeReader/qa/pathQa.ts
index 71779da..a176f76 100644
--- a/vscode/src/codeReader/qa/pathQa.ts
+++ b/vscode/src/codeReader/qa/pathQa.ts
@@ -1,11 +1,12 @@
 /**
- * 预览顶部的问答：文件、文件夹按「工作区文件夹 + 相对路径」，「了解一块代码」的功能对话页按功能的 id，记在这个窗口的 workspaceState 里。
- * 不写进按块存的 `.spx/code-qa.json`。
+ * 预览顶部的问答：文件、文件夹按「工作区文件夹 + 相对路径」，「了解一块代码」的功能对话页按功能的 id，记在这个窗口的 workspaceState 里，
+ * 每处连同下一次接着说时接的会话。不写进按块存的 `.spx/code-qa.json`。
  */
 
 import type { QaEntry } from './qaMap'
 import * as path from 'node:path'
 import { normalizeKey } from '../pathMap'
+import { legacySession } from './qaMap'
 
 /** workspaceState 里这份表的键 */
 export const PATH_QA_STATE_KEY = 'codeReader.pathQa'
@@ -16,8 +17,16 @@ export const PATH_QA_STATE_KEY = 'codeReader.pathQa'
  */
 export const PATH_ASK_ANCHOR = '\0path'
 
-/** 工作区文件夹 Uri → 那条路径上的问答（按问的先后） */
-export type PathQaMap = Record<string, QaEntry[]>
+/** 一处顶部的问答，和这里下一次接着说时接的会话。 */
+export interface PathQa {
+  /** 按问的先后 */
+  entries: QaEntry[]
+  /** 这里最近一次开的 Claude Code 会话 id，开新会话前就记下，没答完的那一轮也算；没开过时没有 */
+  session?: string
+}
+
+/** 记录的键（见 [pathQaKey]、[featureQaKey]）→ 那里的问答 */
+export type PathQaMap = Record<string, PathQa>
 
 /** 工作区根的相对路径是空字符串，跟任何一个文件或子目录都不同。 */
 export function relativeQaKey(rootPath: string, targetPath: string): string | undefined {
@@ -43,26 +52,33 @@ export function displayRelativePath(relativePath: string): string {
 }
 
 export function pathQaEntries(map: PathQaMap, key: string): QaEntry[] {
-  return map[key] ?? []
+  return map[key]?.entries ?? []
 }
 
-/** 新的一次问答接在这条路径已有的后面，别的路径不动。 */
+/** key 那里接着说时接着的会话：最近一次开的，答没答完都算；没开过时没有，开新会话。 */
+export function pathQaSession(map: PathQaMap, key: string): string | undefined {
+  return map[key]?.session
+}
+
+/** 新的一次问答接在这条路径已有的后面，会话和别的路径不动。 */
 export function withPathQa(map: PathQaMap, key: string, entry: QaEntry): PathQaMap {
-  return { ...map, [key]: [...pathQaEntries(map, key), entry] }
+  return { ...map, [key]: { ...map[key], entries: [...pathQaEntries(map, key), entry] } }
 }
 
-/** 删掉这一次；这条路径问光了就把键拿掉。没有这一次时原样返回。 */
+/** 记下 key 那里接着说时要接的会话：开新会话前记，问答不动。 */
+export function withPathSession(map: PathQaMap, key: string, session: string): PathQaMap {
+  return { ...map, [key]: { entries: pathQaEntries(map, key), session } }
+}
+
+/** 删掉这一次；这条路径问光了就把键拿掉，会话也不接了（下次从头问）。没有这一次时原样返回。 */
 export function withoutPathQa(map: PathQaMap, key: string, entryId: string): PathQaMap {
   const entries = pathQaEntries(map, key)
   const kept = entries.filter(entry => entry.id !== entryId)
   if (kept.length === entries.length)
     return map
-  if (kept.length === 0) {
-    const next = { ...map }
-    delete next[key]
-    return next
-  }
-  return { ...map, [key]: kept }
+  if (kept.length === 0)
+    return withoutPathQaKey(map, key)
+  return { ...map, [key]: { ...map[key], entries: kept } }
 }
 
 /** 去掉这个键下的全部问答；没有这个键时原样返回。 */
@@ -79,26 +95,40 @@ export function parsePathQa(value: unknown): PathQaMap {
   if (!isRecord(value))
     return {}
   const map: PathQaMap = {}
-  for (const [key, entries] of Object.entries(value)) {
-    if (!Array.isArray(entries))
-      continue
-    const parsed = entries.flatMap((entry) => {
-      const one = parseEntry(entry)
-      return one ? [one] : []
-    })
-    if (parsed.length > 0)
-      map[key] = parsed
+  for (const [key, stored] of Object.entries(value)) {
+    const one = parsePlace(stored)
+    if (one)
+      map[key] = one
   }
   return map
 }
 
+/** 一处的问答和会话；既没问答又没会话、认不出时没有。旧版本存的是光一串问答，会话照 [legacySession] 补上。 */
+function parsePlace(stored: unknown): PathQa | undefined {
+  let raw: unknown[]
+  let session: string | undefined
+  if (Array.isArray(stored)) {
+    raw = stored
+    session = legacySession(stored)
+  }
+  else if (isRecord(stored) && Array.isArray(stored.entries)) {
+    raw = stored.entries
+    session = typeof stored.session === 'string' && stored.session !== '' ? stored.session : undefined
+  }
+  else {
+    return undefined
+  }
+  const entries = raw.flatMap(entry => parseEntry(entry) ?? [])
+  return entries.length > 0 || session ? { entries, ...(session && { session }) } : undefined
+}
+
 function parseEntry(value: unknown): QaEntry | undefined {
   if (!isRecord(value))
     return undefined
-  const { id, question, answer, createdAt, sessionId, profile, images } = value
-  if (typeof id !== 'string' || typeof question !== 'string' || typeof answer !== 'string' || typeof createdAt !== 'string' || typeof sessionId !== 'string')
+  const { id, question, answer, createdAt, profile, images } = value
+  if (typeof id !== 'string' || typeof question !== 'string' || typeof answer !== 'string' || typeof createdAt !== 'string')
     return undefined
-  const entry: QaEntry = { id, question, answer, createdAt, sessionId }
+  const entry: QaEntry = { id, question, answer, createdAt }
   if (typeof profile === 'string' && profile !== '')
     entry.profile = profile
   if (Array.isArray(images) && images.every(name => typeof name === 'string'))
diff --git a/vscode/src/codeReader/qa/qaMap.test.ts b/vscode/src/codeReader/qa/qaMap.test.ts
index a22b861..a469d40 100644
--- a/vscode/src/codeReader/qa/qaMap.test.ts
+++ b/vscode/src/codeReader/qa/qaMap.test.ts
@@ -6,10 +6,10 @@ import * as path from 'node:path'
 import { afterEach, beforeEach, describe, expect, it } from 'vitest'
 import { detachedFiles, dropEntries, moveEntries, readPathMap, removeFiles, writePathMap } from '../pathMap'
 import { writeQaImages } from './qaImages'
-import { latestSession, QA_FILE, REWRITE_FILE, withEntry, withoutEntry } from './qaMap'
+import { latestSession, QA_FILE, REWRITE_FILE, withEntry, withoutEntry, withSession } from './qaMap'
 
 function entry(id: string, createdAt: string, question = `问 ${id}`): QaEntry {
-  return { id, question, answer: `答 ${id}`, createdAt, sessionId: `s-${id}` }
+  return { id, question, answer: `答 ${id}`, createdAt }
 }
 
 const DISPLAY = 'class ReferralRelation > function display'
@@ -70,20 +70,46 @@ describe('记一次、删一次', () => {
 })
 
 describe('再问时接着哪个会话', () => {
-  it('接着这块最近一次问答的会话；别的块、没问过的块、没记会话 id 的都重新开', () => {
+  it('接着这块最近一次开的会话：开新会话前记下，后开的盖掉先前的；记问答不动会话；别的块、没开过的块重新开', () => {
     let map: QaMap = {}
-    map = withEntry(map, 'a.py', IF, entry('new', '2026-09-26T10:00:00.000Z'))
-    map = withEntry(map, 'a.py', IF, entry('old', '2026-09-25T10:00:00.000Z'))
-    map = withEntry(map, 'a.py', DISPLAY, { ...entry('bare', '2026-09-26T11:00:00.000Z'), sessionId: '' })
-    expect(latestSession(map['a.py'], IF)).toBe('s-new')
+    map = withSession(map, 'a.py', IF, 's-1')
+    map = withEntry(map, 'a.py', IF, entry('a', '2026-09-25T10:00:00.000Z'))
+    expect(latestSession(map['a.py'], IF)).toBe('s-1')
+    map = withSession(map, 'a.py', IF, 's-2')
+    expect(latestSession(map['a.py'], IF)).toBe('s-2')
+    expect(map['a.py']).toEqual([{ anchor: IF, entries: [entry('a', '2026-09-25T10:00:00.000Z')], session: 's-2' }])
+    map = withEntry(map, 'a.py', DISPLAY, entry('b', '2026-09-26T11:00:00.000Z'))
     expect(latestSession(map['a.py'], DISPLAY)).toBeUndefined()
     expect(latestSession(map['a.py'], 'function gone')).toBeUndefined()
     expect(latestSession(undefined, IF)).toBeUndefined()
   })
 
-  it('删掉最近那次，就接着剩下里最近的', () => {
-    const map = withEntry(withEntry({}, 'a.py', IF, entry('a', '2026-09-25T10:00:00.000Z')), 'a.py', IF, entry('b', '2026-09-26T10:00:00.000Z'))
-    expect(latestSession(withoutEntry(map, 'a.py', IF, 'b')['a.py'], IF)).toBe('s-a')
+  it('一次都没答成的块也记着会话（第一轮就超时、出错、被叫停），读写都留着', async () => {
+    const map: QaMap = withSession({}, 'a.py', IF, 's-1')
+    expect(map).toEqual({ 'a.py': [{ anchor: IF, entries: [], session: 's-1' }] })
+    await writePathMap(root, QA_FILE, map)
+    expect(await readPathMap(root, QA_FILE)).toEqual(map)
+  })
+
+  it('删掉一条会话照旧接着；块下面删光了会话也不接了，下次从头问', () => {
+    const map = withSession(withEntry(withEntry({}, 'a.py', IF, entry('a', '2026-09-25T10:00:00.000Z')), 'a.py', IF, entry('b', '2026-09-26T10:00:00.000Z')), 'a.py', IF, 's-1')
+    const once = withoutEntry(map, 'a.py', IF, 'b')
+    expect(latestSession(once['a.py'], IF)).toBe('s-1')
+    expect(withoutEntry(once, 'a.py', IF, 'a')).toEqual({})
+  })
+
+  it('旧文件不单记会话：读进来时接着这块最后一条记录的会话 id，写回去条目上不再带会话 id', async () => {
+    await writeRaw({ 'a.py': [{ anchor: IF, entries: [
+      { ...entry('a', '2026-09-25T10:00:00.000Z'), sessionId: 's-old' },
+      { ...entry('b', '2026-09-26T10:00:00.000Z'), sessionId: 's-last' },
+    ] }, { anchor: DISPLAY, entries: [{ ...entry('c', '2026-09-26T10:00:00.000Z'), sessionId: '' }] }] })
+    const map = await readPathMap(root, QA_FILE)
+    expect(map).toEqual({ 'a.py': [
+      { anchor: DISPLAY, entries: [entry('c', '2026-09-26T10:00:00.000Z')] },
+      { anchor: IF, entries: [entry('a', '2026-09-25T10:00:00.000Z'), entry('b', '2026-09-26T10:00:00.000Z')], session: 's-last' },
+    ] })
+    await writePathMap(root, QA_FILE, map)
+    expect(await fsp.readFile(qaFile(), 'utf8')).not.toContain('sessionId')
   })
 })
 
@@ -110,8 +136,8 @@ describe('读写 .spx/code-qa.json', () => {
     })
     expect(await readPathMap(root, QA_FILE)).toEqual({
       'a.py': [{ anchor: IF, entries: [entry('ok', '2026-09-25T10:00:00.000Z')] }],
-      // 没有会话 id 的照样认，追问时重新开会话
-      'c.py': [{ anchor: IF, entries: [{ id: 'y', question: 'Q', answer: 'A', createdAt: '2026-09-25T10:00:00.000Z', sessionId: '' }] }],
+      // 没记会话的照样认，追问时重新开会话
+      'c.py': [{ anchor: IF, entries: [{ id: 'y', question: 'Q', answer: 'A', createdAt: '2026-09-25T10:00:00.000Z' }] }],
     })
   })
 
@@ -211,11 +237,11 @@ describe('重写注释的记录：另存一份，和问答分开', () => {
   const exists = (file: string): Promise<boolean> => fsp.access(file).then(() => true, () => false)
 
   function rewrite(id: string, createdAt: string, extra: Partial<RewriteEntry> = {}): RewriteEntry {
-    return { id, question: '/ecc:writing-code-comments a.py:3-8', body: `正文 ${id}`, createdAt, sessionId: `r-${id}`, ...extra }
+    return { id, question: '/ecc:writing-code-comments a.py:3-8', body: `正文 ${id}`, createdAt, ...extra }
   }
 
   it('存在 .spx/comment-rewrites.json，不进问答那份；正文、没写进文件的原因跟着这条读得回来，接着最近一次重写的会话', async () => {
-    const map: RewriteMap = withEntry(withEntry({}, 'a.py', IF, rewrite('a', '2026-09-25T10:00:00.000Z')), 'a.py', IF, rewrite('b', '2026-09-26T10:00:00.000Z', { error: '这段注释的定界符认不出来，没有改文件。' }))
+    const map: RewriteMap = withSession(withEntry(withEntry({}, 'a.py', IF, rewrite('a', '2026-09-25T10:00:00.000Z')), 'a.py', IF, rewrite('b', '2026-09-26T10:00:00.000Z', { error: '这段注释的定界符认不出来，没有改文件。' })), 'a.py', IF, 'r-b')
     await writePathMap(root, REWRITE_FILE, map)
     expect(await exists(rewriteFile())).toBe(true)
     expect(await exists(qaFile())).toBe(false)
diff --git a/vscode/src/codeReader/qa/qaMap.ts b/vscode/src/codeReader/qa/qaMap.ts
index c3fac76..702d449 100644
--- a/vscode/src/codeReader/qa/qaMap.ts
+++ b/vscode/src/codeReader/qa/qaMap.ts
@@ -1,19 +1,19 @@
 /**
  * 块下面的对话怎么存：每个工作区文件夹里每种对话一份文件，读写的规矩同文件注释（见 pathMap）。
  * 问 AI 记在 `.spx/code-qa.json`，重写注释记在 `.spx/comment-rewrites.json`：两份分开，各自接着自己最近一次的会话。
- * 形状是 `{ "相对路径": [{ anchor, entries: [...] }] }`：一份文件里有记录的每一块一项（anchor 见 BlockAnchors），块下面的按时间排。
+ * 形状是 `{ "相对路径": [{ anchor, entries: [...], session }] }`：一份文件里有记录或开过会话的每一块一项（anchor 见 BlockAnchors），块下面的按时间排，
+ * session 是这块下一次接着说时接的会话。
  * 带的图片是 `.spx/code-qa/` 里的文件，条目删了（删一条、删源文件）文件跟着删（见 attachments）。
  */
 
 import type { PathMap, PathMapFile } from '../pathMap'
 import { isQaImageName, QA_IMAGE_DIR } from './qaImages'
 
-/** 块下面的一轮：说的话、什么时候（ISO 时间）、Claude Code 的会话 id。 */
+/** 块下面的一轮：说的话、什么时候（ISO 时间）。 */
 export interface ChatEntry {
   id: string
   question: string
   createdAt: string
-  sessionId: string
   /** 用哪个 profile 答的（profile 名）；选「默认」时、以前存的没有 */
   profile?: string
   /** 带的图片：`.spx/code-qa/` 里的文件名（见 qaImages），按贴的先后；没带图片时没有 */
@@ -31,10 +31,12 @@ export interface RewriteEntry extends ChatEntry {
   error?: string
 }
 
-/** 挂在一块上的记录。 */
+/** 挂在一块上的记录，和这块下一次接着说时接的会话。 */
 export interface QaThread<E extends ChatEntry = QaEntry> {
   anchor: string
   entries: E[]
+  /** 这块最近一次开的 Claude Code 会话 id，开新会话前就记下，没答完的那一轮也算；没开过时没有 */
+  session?: string
 }
 
 export type QaMap = PathMap<QaThread[]>
@@ -58,7 +60,6 @@ function parseChat(value: Record<string, unknown>): ChatEntry | undefined {
     id,
     question,
     createdAt,
-    sessionId: typeof value.sessionId === 'string' ? value.sessionId : '',
     ...(profile && { profile }),
     ...(images.length > 0 && { images }),
   }
@@ -87,17 +88,21 @@ function parseRewriteEntry(value: unknown): RewriteEntry | undefined {
   return { id, question, ...(body && { body }), ...(error && { error }), ...rest }
 }
 
-/** 同一块的并成一项；块按记号排，一块下面的按时间排：写出来的顺序稳定，git diff 干净。 */
+/** 同一块的并成一项，既没记录又没会话的块不留；块按记号排，一块下面的按时间排：写出来的顺序稳定，git diff 干净。 */
 function tidy<E extends ChatEntry>(threads: QaThread<E>[]): QaThread<E>[] {
-  const byAnchor = new Map<string, E[]>()
-  for (const thread of threads)
-    byAnchor.set(thread.anchor, [...byAnchor.get(thread.anchor) ?? [], ...thread.entries])
-  return [...byAnchor]
-    .filter(([, entries]) => entries.length > 0)
-    .sort(([a], [b]) => a < b ? -1 : a > b ? 1 : 0)
-    .map(([anchor, entries]) => ({
-      anchor,
-      entries: [...entries].sort((a, b) => Date.parse(a.createdAt) - Date.parse(b.createdAt) || (a.id < b.id ? -1 : a.id > b.id ? 1 : 0)),
+  const byAnchor = new Map<string, QaThread<E>>()
+  for (const thread of threads) {
+    const before = byAnchor.get(thread.anchor)
+    // 后来的会话盖掉先前的；只添记录、没带会话的那一项不动会话
+    const session = thread.session ?? before?.session
+    byAnchor.set(thread.anchor, { anchor: thread.anchor, entries: [...before?.entries ?? [], ...thread.entries], ...(session && { session }) })
+  }
+  return [...byAnchor.values()]
+    .filter(thread => thread.entries.length > 0 || thread.session)
+    .sort((a, b) => a.anchor < b.anchor ? -1 : a.anchor > b.anchor ? 1 : 0)
+    .map(thread => ({
+      ...thread,
+      entries: [...thread.entries].sort((a, b) => Date.parse(a.createdAt) - Date.parse(b.createdAt) || (a.id < b.id ? -1 : a.id > b.id ? 1 : 0)),
     }))
 }
 
@@ -110,13 +115,20 @@ function threadsParser<E extends ChatEntry>(parseEntry: (value: unknown) => E |
       const anchor = isRecord(item) ? text(item.anchor) : undefined
       if (!anchor || !isRecord(item) || !Array.isArray(item.entries))
         return []
-      return [{ anchor, entries: item.entries.flatMap(entry => parseEntry(entry) ?? []) }]
+      const session = text(item.session) ?? legacySession(item.entries)
+      return [{ anchor, entries: item.entries.flatMap(entry => parseEntry(entry) ?? []), ...(session && { session }) }]
     })
     const tidied = tidy(threads)
     return tidied.length > 0 ? tidied : undefined
   }
 }
 
+/** 旧文件不单记会话，接着说时接的是这块最后一条记录的会话 id：读旧文件时照它补上，写回去就是新的样子。 */
+export function legacySession(entries: readonly unknown[]): string | undefined {
+  const last = entries.at(-1)
+  return isRecord(last) ? text(last.sessionId) : undefined
+}
+
 function threadsFile<E extends ChatEntry>(path: string, label: string, parseEntry: (value: unknown) => E | undefined): PathMapFile<QaThread<E>[]> {
   return {
     path,
@@ -135,17 +147,25 @@ export function withEntry<E extends ChatEntry>(map: PathMap<QaThread<E>[]>, key:
   return { ...map, [key]: tidy([...map[key] ?? [], { anchor, entries: [entry] }]) }
 }
 
-/** 删掉一条；块下面删光了这块就不挂了，文件里删光了这份文件就不记了。 */
+/** 删掉一条；块下面删光了这块就不挂了、会话也不接了（下次从头问），文件里删光了这份文件就不记了。 */
 export function withoutEntry<E extends ChatEntry>(map: PathMap<QaThread<E>[]>, key: string, anchor: string, entryId: string): PathMap<QaThread<E>[]> {
-  const threads = tidy((map[key] ?? []).map(thread => thread.anchor === anchor
-    ? { anchor, entries: thread.entries.filter(entry => entry.id !== entryId) }
-    : thread))
+  const threads = tidy((map[key] ?? []).flatMap((thread) => {
+    if (thread.anchor !== anchor)
+      return [thread]
+    const entries = thread.entries.filter(entry => entry.id !== entryId)
+    return entries.length > 0 ? [{ ...thread, entries }] : []
+  }))
   const next = { ...map }
   delete next[key]
   return threads.length > 0 ? { ...next, [key]: threads } : next
 }
 
-/** 在 anchor 那块接着说时接着的会话：这块最近一条的会话 id；没有记录、或那条没记会话 id 时没有，重新开会话。 */
+/** 在 anchor 那块接着说时接着的会话：这块最近一次开的会话，答没答完都算；没开过时没有，开新会话。 */
 export function latestSession(threads: readonly QaThread<ChatEntry>[] | undefined, anchor: string): string | undefined {
-  return threads?.find(thread => thread.anchor === anchor)?.entries.at(-1)?.sessionId || undefined
+  return threads?.find(thread => thread.anchor === anchor)?.session
+}
+
+/** 记下 key 这份文件 anchor 那块接着说时要接的会话：开新会话前记，记录不动。 */
+export function withSession<E extends ChatEntry>(map: PathMap<QaThread<E>[]>, key: string, anchor: string, session: string): PathMap<QaThread<E>[]> {
+  return { ...map, [key]: tidy([...map[key] ?? [], { anchor, entries: [], session }]) }
 }