merge(pr-留言): 把議題支援套到 pr-threads 的共用結構上

#48 把留言讀取抽成 pr-threads 給 pr-watch 與 pr-comments 共用，本分支則在修「純議題讀不了」與「已處理的判定有兩份」。兩邊動到同一塊，但要的其實是同一件事——#48 的檔頭就寫著「規則寫兩份遲早會各自演化，一邊認自己打的 +1、另一邊認任何人的」，而那正是本分支在 lib 與 pr-comments 之間發現的那個 bug。合併的方向是保留 pr-threads 的結構，把修正套進去： - readGeneral 改名 readGeneralComments 並導出，pr-comments 判斷出是純議題時只叫它。先讀 /issues/{index} 再決定要不要翻 review——每個 PR 都是議題，反過來不成立。 - pr-threads 自己那份 markedByMe 拿掉，改用 lib 的 mergedByMe。抽取契約數未整併則數用的是同一條規則，現在三處共用一份，#48 擔心的分歧不會再發生。 - pr-comments 的試跑改印 commonRequests：它收得下兩種輸入，而試跑階段還沒讀過議題、不知道是哪一種。與其假設是 PR 而列出五個（對純議題有三個根本不會發），不如只列一定會發的，其餘交給 note。pr-watch 的輸入一定是 PR，繼續用 plannedRequests。 lib.js 與 sdlc-feat.md 兩邊改的是不同區域，三方合併無衝突。 Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-09-17 09:16:34 +00:00
parent 767ca69c12
commit 42f5b86299
9 changed files with 1094 additions and 149 deletions
@@ -0,0 +1,344 @@
+/**
+ * 回報 PR 現況，並在它結束時清掉工作樹。
+ *
+ * 這一支的價值在**四種 PR 狀態各自的處置**：merged 與 closed 是終止狀態，工作樹清掉；
+ * open 繼續監看；draft 尤其要盯住——被退回草稿代表還要繼續改，這時候那棵工作樹更需要
+ * 留著，清掉它等於把人做到一半的環境收走。
+ *
+ * 另外兩件事各有測試：建議動作是**列舉值**（呼叫端要程式化判斷，不是去讀一段文字），
+ * 以及清理的守門（有未提交變更就擋下，絕不 `--force`）。
+ *
+ * 一次性、無狀態：不與上次的結果比較，也不讀寫任何游標或狀態檔——「已處理」的判定
+ * 基準是 Gitea 上的 `+1` 與 resolve，現況快照本身就足以回答「還有沒有事要做」。
+ */
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { existsSync, mkdirSync, mkdtempSync, readdirSync, rmSync, writeFileSync } from 'node:fs';
+import { join } from 'node:path';
+import { runScript, tmpRoot } from './helpers/run-script.js';
+import { makeTempRepoWithRemote } from './helpers/temp-repo.js';
+import { healthyRoutes, stubEnv, withStubGitea } from './helpers/stub-gitea.js';
+
+const REPO = 'plugins/tea-sdlc';
+const INDEX = 46;
+const SLUG = 'pr-watch-and-cleanup';
+const BRANCH = `feat/${SLUG}/main`;
+
+/**
+ * 一顆 PR 的現場：狀態由 options 決定，留言預設沒有。
+ * 一般留言只有在沒有自己打的 `+1` 時才算未處理。
+ */
+function routes({ state = 'open', merged = false, draft = false, general = [] } = {}) {
+  const base = healthyRoutes(REPO, {
+    [`GET /api/v1/repos/${REPO}/pulls/${INDEX}`]: {
+      status: 200,
+      body: {
+        number: INDEX,
+        title: BRANCH,
+        html_url: `https://gitea.jsc.idv.tw/${REPO}/pulls/${INDEX}`,
+        state,
+        merged,
+        draft,
+        head: { ref: BRANCH },
+      },
+    },
+    [`GET /api/v1/repos/${REPO}/issues/${INDEX}/comments`]: {
+      status: 200,
+      body: general.map((c, i) => ({ id: 100 + i, body: c.body, user: { login: 'reviewer' } })),
+    },
+    [`GET /api/v1/repos/${REPO}/pulls/${INDEX}/reviews`]: { status: 200, body: [] },
+    [`GET /api/v1/repos/${REPO}/issues/${INDEX}/timeline`]: { status: 200, body: [] },
+  });
+  general.forEach((c, i) => {
+    base[`GET /api/v1/repos/${REPO}/issues/comments/${100 + i}/reactions`] = {
+      status: 200,
+      body: (c.reactions ?? []).map((content) => ({
+        content,
+        user: { login: c.reactedBy ?? 'tester' },
+      })),
+    };
+  });
+  return base;
+}
+
+/** 備好一棵真的工作樹（由 branch-prep 建）與一台假 Gitea */
+async function withScene(t, pr = {}) {
+  const repo = makeTempRepoWithRemote();
+  t.after(() => repo.cleanup());
+  mkdirSync(tmpRoot, { recursive: true });
+  const home = mkdtempSync(join(tmpRoot, 'home-'));
+  t.after(() => rmSync(home, { recursive: true, force: true }));
+
+  const prep = await runScript(
+    'branch-prep.js',
+    ['--repo', REPO, '--path', repo.dir, '--source', 'master', '--type', 'feat', '--slug', SLUG],
+    { env: { TEA_SDLC_HOME: home } },
+  );
+  assert.equal(prep.json.ok, true, prep.json.error?.message);
+
+  const stub = await withStubGitea(t, routes(pr));
+  const run = (args = []) =>
+    runScript('pr-watch.js', ['--repo', REPO, '--index', String(INDEX), ...args], {
+      env: { ...stubEnv(stub), TEA_SDLC_HOME: home },
+    });
+
+  return { repo, home, stub, run, worktree: prep.json.data.worktree };
+}
+
+// ── PR 狀態到處置的對照表 ─────────────────────────────────────────
+
+const DISPOSITION = [
+  {
+    name: 'open：繼續監看，工作樹留著',
+    pr: { state: 'open' },
+    expected: { state: 'open', terminal: false, cleaned: false, suggestedAction: 'nothing-to-do' },
+    工作樹還在: true,
+  },
+  {
+    name: 'merged：終止，工作樹清掉',
+    pr: { state: 'closed', merged: true },
+    expected: { state: 'merged', terminal: true, cleaned: true, suggestedAction: 'nothing-to-do' },
+    工作樹還在: false,
+  },
+  {
+    name: 'closed：同樣終止，工作樹清掉',
+    pr: { state: 'closed', merged: false },
+    expected: { state: 'closed', terminal: true, cleaned: true, suggestedAction: 'nothing-to-do' },
+    工作樹還在: false,
+  },
+  {
+    name: 'draft：不終止也不清理——退回草稿代表還要繼續改',
+    pr: { state: 'open', draft: true },
+    expected: { state: 'draft', terminal: false, cleaned: false, suggestedAction: 'nothing-to-do' },
+    工作樹還在: true,
+  },
+];
+
+for (const { name, pr, expected, 工作樹還在 } of DISPOSITION) {
+  test(`狀態：${name}`, async (t) => {
+    const { run, worktree } = await withScene(t, pr);
+
+    const { code, json } = await run();
+
+    assert.equal(code, 0, json.error?.message);
+    assert.equal(json.data.state, expected.state);
+    assert.equal(json.data.terminal, expected.terminal);
+    assert.equal(json.data.cleaned, expected.cleaned);
+    assert.equal(json.data.suggestedAction, expected.suggestedAction);
+    assert.equal(existsSync(worktree), 工作樹還在);
+  });
+}
+
+test('清理只移除工作樹，本機分支留著', async (t) => {
+  const { repo, run, worktree } = await withScene(t, { state: 'closed', merged: true });
+
+  await run();
+
+  assert.equal(existsSync(worktree), false);
+  assert.equal(
+    repo.git('branch', '--list', BRANCH).trim().replace(/^\*?\s*/, ''),
+    BRANCH,
+    '本機分支要留著，之後還能回頭看那段歷史',
+  );
+});
+
+// ── 未處理留言 ─────────────────────────────────────────────────────
+
+test('有未處理留言時建議去跑 sdlc-fix，但不自己執行', async (t) => {
+  const { run, stub } = await withScene(t, { general: [{ body: '這裡少了錯誤處理' }] });
+
+  const { json } = await run();
+
+  assert.equal(json.data.未處理留言數, 1);
+  assert.equal(json.data.suggestedAction, 'run-sdlc-fix');
+  assert.deepEqual(
+    stub.requests.filter((r) => r.method !== 'GET' && !r.path.endsWith('/issues/0')),
+    [],
+    '只通知不動手：監看不該替使用者回覆或標記任何東西',
+  );
+});
+
+test('自己打過 +1 的留言算已處理，不再催', async (t) => {
+  const { run } = await withScene(t, {
+    general: [{ body: '這裡少了錯誤處理', reactions: ['+1'], reactedBy: 'tester' }],
+  });
+
+  const { json } = await run();
+
+  assert.equal(json.data.未處理留言數, 0);
+  assert.equal(json.data.suggestedAction, 'nothing-to-do');
+});
+
+test('別人打的 +1 不算已處理：那是「我同意」，不是「我處理過了」', async (t) => {
+  const { run } = await withScene(t, {
+    general: [{ body: '這裡少了錯誤處理', reactions: ['+1'], reactedBy: 'reviewer' }],
+  });
+
+  const { json } = await run();
+
+  assert.equal(json.data.未處理留言數, 1);
+});
+
+test('draft 上也照樣數留言，繼續監看', async (t) => {
+  const { run, worktree } = await withScene(t, {
+    state: 'open',
+    draft: true,
+    general: [{ body: '這段先別急著合併' }],
+  });
+
+  const { json } = await run();
+
+  assert.equal(json.data.state, 'draft');
+  assert.equal(json.data.suggestedAction, 'run-sdlc-fix');
+  assert.equal(json.data.terminal, false);
+  assert.equal(existsSync(worktree), true, '被退回草稿時更需要那棵工作樹');
+});
+
+// ── 清理的守門 ─────────────────────────────────────────────────────
+
+test('工作樹裡有未提交變更時擋下清理，並報出路徑', async (t) => {
+  const { run, worktree } = await withScene(t, { state: 'closed', merged: true });
+  writeFileSync(join(worktree, 'wip.txt'), '做到一半\n');
+
+  const { code, json } = await run();
+
+  assert.equal(code, 0, '這是一份現況回報，擋下清理不等於整件事失敗');
+  assert.equal(json.data.terminal, true);
+  assert.equal(json.data.cleaned, false);
+  assert.equal(json.data.suggestedAction, 'blocked-dirty');
+  assert.equal(json.data.工作樹.有未提交變更, true);
+  assert.deepEqual(json.data.工作樹.檔案, ['wip.txt']);
+  assert.equal(existsSync(join(worktree, 'wip.txt')), true, '絕不 --force：沒提交的東西救不回來');
+});
+
+test('工作樹早就不在時不當成失敗，也不說自己清了', async (t) => {
+  const { repo, run, worktree } = await withScene(t, { state: 'closed', merged: true });
+  repo.git('worktree', 'remove', worktree);
+
+  const { code, json } = await run();
+
+  assert.equal(code, 0);
+  assert.equal(json.data.工作樹.存在, false);
+  assert.equal(json.data.cleaned, false);
+  assert.equal(json.data.suggestedAction, 'nothing-to-do');
+});
+
+test('路徑上是別的 clone 留下的東西時，說出來而不是靜靜跳過', async (t) => {
+  const { repo, run, worktree } = await withScene(t, { state: 'closed', merged: true });
+  repo.git('worktree', 'remove', worktree);
+  mkdirSync(join(worktree, '.git'), { recursive: true });
+
+  const { code, json } = await run();
+
+  assert.equal(code, 0);
+  assert.equal(json.data.工作樹.是工作樹, false, '.git 是目錄的是獨立 clone，不是工作樹');
+  assert.equal(json.data.cleaned, false);
+  assert.equal(json.data.suggestedAction, 'cleanup', '要人動手，而手動出口會說出確切的原因');
+  assert.equal(existsSync(join(worktree, '.git')), true, '不是我們建的東西就不碰');
+});
+
+test('清不掉的路徑，--dry-run 不會預告一行實跑會拒絕的指令', async (t) => {
+  // 試跑印得出漂亮的計畫、實跑卻被擋下來，是最難查的那種落差
+  const { repo, run, worktree } = await withScene(t, { state: 'closed', merged: true });
+  repo.git('worktree', 'remove', worktree);
+  mkdirSync(worktree, { recursive: true });
+  writeFileSync(join(worktree, '別人的東西.txt'), 'x\n');
+
+  const { json } = await run(['--dry-run']);
+
+  assert.deepEqual(json.data.commands, []);
+  assert.equal(json.data.工作樹.是工作樹, false);
+});
+
+// ── 回報內容 ───────────────────────────────────────────────────────
+
+test('回報內容含 PR 狀態、未處理留言數與工作樹現況', async (t) => {
+  const { run, worktree } = await withScene(t, { general: [{ body: '一則意見' }] });
+
+  const { json } = await run();
+
+  assert.equal(json.data.index, INDEX);
+  assert.equal(json.data.url, `https://gitea.jsc.idv.tw/${REPO}/pulls/${INDEX}`);
+  assert.equal(json.data.branch, BRANCH, '工作樹是從 PR 的 head 分支推導的，要說出用的是哪一支');
+  assert.equal(json.data.未處理留言數, 1);
+  assert.deepEqual(json.data.工作樹, {
+    路徑: worktree,
+    存在: true,
+    是工作樹: true,
+    有未提交變更: false,
+    檔案: [],
+  });
+});
+
+test('建議動作是固定的列舉值，呼叫端才能程式化判斷', async (t) => {
+  const 列舉 = ['run-sdlc-fix', 'cleanup', 'nothing-to-do', 'blocked-dirty'];
+  const { run } = await withScene(t);
+
+  const { json } = await run();
+
+  assert.ok(列舉.includes(json.data.suggestedAction), `不在列舉裡：${json.data.suggestedAction}`);
+});
+
+// ── 無狀態 ─────────────────────────────────────────────────────────
+
+test('跑兩次結果一樣，而且不留下任何游標或狀態檔', async (t) => {
+  const { repo, home, run } = await withScene(t, { general: [{ body: '一則意見' }] });
+
+  const first = await run();
+  const second = await run();
+
+  assert.deepEqual(second.json, first.json, '不與上次比較，同樣的現況就該得到同樣的答案');
+  assert.deepEqual(readdirSync(home), ['worktrees'], '家目錄底下只該有工作樹本身');
+  assert.equal(repo.git('status', '--porcelain'), '', '目標專案裡不留任何東西');
+});
+
+// ── --dry-run ─────────────────────────────────────────────────────
+
+test('--dry-run 印出將執行的 git 指令與將發出的請求，且不清理', async (t) => {
+  const { run, worktree } = await withScene(t, { state: 'closed', merged: true });
+
+  const { code, json } = await run(['--dry-run']);
+
+  assert.equal(code, 0);
+  assert.equal(json.data.dryRun, true);
+  assert.deepEqual(json.data.commands, [`git worktree remove ${worktree}`]);
+  assert.ok(json.data.requests.some((r) => r.path.endsWith(`/pulls/${INDEX}`)));
+  assert.equal(json.data.cleaned, false);
+  assert.equal(json.data.suggestedAction, 'cleanup', '試跑不動手，該做的事要說出來');
+  assert.equal(existsSync(worktree), true);
+});
+
+test('--dry-run 在還不該清理的狀態下不印 git 指令', async (t) => {
+  const { run } = await withScene(t, { state: 'open' });
+
+  const { json } = await run(['--dry-run']);
+
+  assert.deepEqual(json.data.commands, []);
+});
+
+// ── 錯誤 ───────────────────────────────────────────────────────────
+
+test('PR 不存在時回可區分的錯誤碼', async (t) => {
+  const { stub, run } = await withScene(t);
+  stub.requests.length = 0;
+
+  const { json } = await runScript(
+    'pr-watch.js',
+    ['--repo', REPO, '--index', '999'],
+    { env: stubEnv(stub) },
+  );
+
+  assert.equal(json.error.code, 'PULL_NOT_FOUND');
+});
+
+test('--index 不是正整數時擋在打 Gitea 之前', async (t) => {
+  const { stub } = await withScene(t);
+  const before = stub.requests.length;
+
+  const { json } = await runScript('pr-watch.js', ['--repo', REPO, '--index', '0'], {
+    env: stubEnv(stub),
+  });
+
+  assert.equal(json.error.code, 'BAD_INDEX');
+  assert.equal(stub.requests.length, before);
+});
@@ -133,6 +133,19 @@ test('邊界把第一段不做的事分開列，且明講不寫本機狀態檔',
  assert.match(boundary, /換一台機器或換一個 agent/, '要說明為什麼不留狀態檔');
 });

+test('第三段收尾時告訴使用者之後怎麼查 PR，但不自己反覆跑', () => {
+  assert.match(phase3, /pr-watch\.js/);
+  assert.match(phase3, /worktree-remove\.js/, '手動清理的出口也要講，否則沒人知道它在');
+  assert.match(phase3, /不要自己反覆跑/);
+  assert.match(phase3, /suggestedAction/, '建議動作是列舉值，要讓使用者知道有這個東西可以判斷');
+});
+
+test('邊界擋住「監看報了就自己去跑 sdlc-fix」', () => {
+  const boundary = prompt.slice(prompt.indexOf('## 邊界'));
+  assert.match(boundary, /不自動反覆執行 `pr-watch`/);
+  assert.match(boundary, /只由使用者明確叫用/);
+});
+
 // ── 第二段：逐項實作 ───────────────────────────────────────────────

 test('第二段明講改的是工作樹裡的檔案，不是主工作區', () => {
@@ -0,0 +1,178 @@
+/**
+ * 手動清理工作樹。
+ *
+ * 這一支的重點全在**守門**：清理會被 pr-watch 自動執行，而自動執行的東西只能做
+ * 可逆的事。工作樹裡還有沒提交的東西就中止，絕不 `--force`——刪掉的檔案救不回來。
+ * 移除只動工作樹，本機分支留著，使用者還能回頭看那段歷史。
+ *
+ * 路徑由 `owner/repo/分支名` 推導，不查表也不讀狀態檔，所以這裡連帶驗它與
+ * branch-prep 算出來的是同一條。
+ *
+ * git 不做替身：在臨時 git repo 上跑真的 git，以本機裸 repo 充當遠端，不需網路。
+ */
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { existsSync, mkdirSync, mkdtempSync, rmSync, writeFileSync } from 'node:fs';
+import { join } from 'node:path';
+import { runScript, tmpRoot } from './helpers/run-script.js';
+import { makeTempRepoWithRemote } from './helpers/temp-repo.js';
+
+const REPO = 'plugins/tea-sdlc';
+
+/**
+ * 備好一棵真的工作樹：路徑由 branch-prep 建，測試不自己算，
+ * 兩支腳本推導出同一條路徑這件事本身就是要驗的東西。
+ */
+async function withWorktree(t, slug = 'mine') {
+  const repo = makeTempRepoWithRemote();
+  t.after(() => repo.cleanup());
+  mkdirSync(tmpRoot, { recursive: true });
+  const home = mkdtempSync(join(tmpRoot, 'home-'));
+  t.after(() => rmSync(home, { recursive: true, force: true }));
+
+  const { json } = await runScript(
+    'branch-prep.js',
+    ['--repo', REPO, '--path', repo.dir, '--source', 'master', '--type', 'feat', '--slug', slug],
+    { env: { TEA_SDLC_HOME: home } },
+  );
+  assert.equal(json.ok, true, json.error?.message);
+  return { repo, home, branch: json.data.branch, worktree: json.data.worktree };
+}
+
+const run = (home, args) => runScript('worktree-remove.js', args, { env: { TEA_SDLC_HOME: home } });
+
+// ── 乾淨時移除 ─────────────────────────────────────────────────────
+
+test('工作樹乾淨時移除它，本機分支留著', async (t) => {
+  const { repo, home, branch, worktree } = await withWorktree(t);
+
+  const { code, json } = await run(home, ['--repo', REPO, '--branch', branch]);
+
+  assert.equal(code, 0, json.error?.message);
+  assert.equal(json.data.removed, true);
+  assert.equal(existsSync(worktree), false, '工作樹要真的不見了');
+  assert.equal(
+    repo.git('branch', '--list', branch).trim().replace(/^\*?\s*/, ''),
+    branch,
+    '本機分支要留著：不佔什麼空間，而使用者還會回頭看那段歷史',
+  );
+});
+
+test('回報的路徑就是 branch-prep 建的那一條', async (t) => {
+  const { home, branch, worktree } = await withWorktree(t);
+
+  const { json } = await run(home, ['--repo', REPO, '--branch', branch]);
+
+  assert.equal(json.data.worktree, worktree, '兩支腳本要從同一個輸入推導出同一條路徑');
+});
+
+// ── 守門：有未提交變更就中止 ───────────────────────────────────────
+
+test('工作樹裡有未提交的變更時中止，並報出路徑', async (t) => {
+  const { home, branch, worktree } = await withWorktree(t);
+  writeFileSync(join(worktree, 'README.md'), '改到一半的東西\n');
+
+  const { code, json } = await run(home, ['--repo', REPO, '--branch', branch]);
+
+  assert.equal(code, 1);
+  assert.equal(json.error.code, 'WORKTREE_DIRTY');
+  assert.match(json.error.message, new RegExp(worktree), '要指名是哪一條路徑，人才找得到它');
+  assert.match(json.error.message, /README\.md/, '也要說出是哪些檔案擋住了');
+  assert.equal(existsSync(worktree), true, '擋下來就不該已經刪掉');
+  assert.equal(existsSync(join(worktree, 'README.md')), true);
+});
+
+test('未追蹤的檔案同樣算未提交：它一樣會被刪掉', async (t) => {
+  const { home, branch, worktree } = await withWorktree(t);
+  writeFileSync(join(worktree, 'notes.txt'), '還沒加進版控的筆記\n');
+
+  const { json } = await run(home, ['--repo', REPO, '--branch', branch]);
+
+  assert.equal(json.error.code, 'WORKTREE_DIRTY');
+  assert.match(json.error.message, /notes\.txt/);
+});
+
+// ── 冪等 ───────────────────────────────────────────────────────────
+
+test('工作樹本來就不在時安靜地成功，重跑不會失敗', async (t) => {
+  const { home, branch } = await withWorktree(t);
+  await run(home, ['--repo', REPO, '--branch', branch]);
+
+  const { code, json } = await run(home, ['--repo', REPO, '--branch', branch]);
+
+  assert.equal(code, 0, json.error?.message);
+  assert.equal(json.data.removed, false);
+  assert.equal(json.data.已經不在, true, '要說清楚是本來就不在，不是這次刪的');
+});
+
+// ── --dry-run ─────────────────────────────────────────────────────
+
+test('--dry-run 印出將執行的 git 指令，且不移除任何東西', async (t) => {
+  const { home, branch, worktree } = await withWorktree(t);
+
+  const { code, json } = await run(home, ['--repo', REPO, '--branch', branch, '--dry-run']);
+
+  assert.equal(code, 0);
+  assert.equal(json.data.dryRun, true);
+  assert.deepEqual(json.data.commands, [`git worktree remove ${worktree}`]);
+  assert.equal(
+    json.data.commands.some((c) => c.includes('--force')),
+    false,
+    '絕不 --force：自動執行的東西只能做可逆的事',
+  );
+  assert.equal(existsSync(worktree), true, '試跑不該真的刪掉');
+});
+
+test('--dry-run 也照樣把守門的結果說出來', async (t) => {
+  // 試跑印得出漂亮的計畫、實跑卻被擋下來，是最難查的那種落差
+  const { home, branch, worktree } = await withWorktree(t);
+  writeFileSync(join(worktree, 'wip.txt'), '做到一半\n');
+
+  const { json } = await run(home, ['--repo', REPO, '--branch', branch, '--dry-run']);
+
+  assert.equal(json.error.code, 'WORKTREE_DIRTY');
+});
+
+// ── flag ──────────────────────────────────────────────────────────
+
+test('缺 --branch 時指名缺的是哪一個', async (t) => {
+  const { home } = await withWorktree(t);
+
+  const { json } = await run(home, ['--repo', REPO]);
+
+  assert.equal(json.error.code, 'MISSING_FLAG');
+  assert.match(json.error.message, /--branch/);
+});
+
+test('--repo 格式不是 owner/name 時失敗', async (t) => {
+  const { home } = await withWorktree(t);
+
+  const { json } = await run(home, ['--repo', 'tea-sdlc', '--branch', 'feat/mine/main']);
+
+  assert.equal(json.error.code, 'BAD_REPO');
+});
+
+test('路徑上是一個獨立的 clone 時也擋下：對它下 worktree remove 只會得到一句 git 的原始錯誤', async (t) => {
+  const { repo, home, branch, worktree } = await withWorktree(t);
+  repo.git('worktree', 'remove', worktree);
+  mkdirSync(join(worktree, '.git'), { recursive: true });
+
+  const { code, json } = await run(home, ['--repo', REPO, '--branch', branch]);
+
+  assert.equal(code, 1);
+  assert.equal(json.error.code, 'NOT_A_WORKTREE');
+  assert.equal(existsSync(join(worktree, '.git')), true);
+});
+
+test('推導出來的路徑上是別人的東西時不碰它', async (t) => {
+  const { repo, home, branch, worktree } = await withWorktree(t);
+  repo.git('worktree', 'remove', worktree);
+  mkdirSync(worktree, { recursive: true });
+  writeFileSync(join(worktree, '別人的東西.txt'), 'x\n');
+
+  const { code, json } = await run(home, ['--repo', REPO, '--branch', branch]);
+
+  assert.equal(code, 1);
+  assert.equal(json.error.code, 'NOT_A_WORKTREE');
+  assert.equal(existsSync(join(worktree, '別人的東西.txt')), true);
+});