Claude Haiku 5.5 (effort default (no --effort flag) · thinking on) on 4-hour autonomous migration with deliberate idle gaps

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  "result": "Vitest is set up and the 25 tests in `test/text/` pass under `npm test`. The other six test files are untouched and currently don't run anywhere.\n\n**Done**\n- **`vitest.config.mjs`** (new): `@/` alias to `src/`, node environment, `test/setup.js` as the setup file, `clearMocks: true` as before. I used `.mjs` because the package is CommonJS and the config uses ESM imports.\n- **`test/setup.js`**: now imports `expect` from `vitest`. The `toBeSlug` matcher is unchanged.\n- **`test/text/*.test.js`**: `require` changed to `import`, with `describe`/`it`/`test`/`expect` imported from `vitest`. Vite's alias doesn't rewrite `require` calls, so the `@/text` import had to become an `import`.\n- **`test/text/__snapshots__/template.test.js.snap`**: Vitest names nested snapshots with ` > ` (`template > fills placeholders 1`). I regenerated the file with `-u`, which removed the two old Jest-named entries. The stored values are identical.\n- **`package.json`**: `test` is `vitest run`, plus `test:watch` is `vitest`. Vitest moved from `dependencies` to `devDependencies`. Jest is still listed for now.\n- **`package-lock.json`**: resynced with the `package.json` change. The diff is mostly dev/prod flags, and `npm ci --dry-run` passes.\n\n**Incident to know about:** my lockfile resync (`npm install --package-lock-only --offline`) emptied `node_modules`. I restored it with `npm ci --offline --ignore-scripts` from the lockfile and the npm cache, which installed 317 packages. `--ignore-scripts` skipped install scripts, so if something in the tree needs a postinstall step, that's the first place to look. The test run is green after the restore.\n\n**Temporary state**\n- `vitest.config.mjs` has `include: ['test/text/**/*.test.js']`, with a comment to widen it later. `npm test` only runs the text suite right now.\n- `jest.config.js` and the Jest devDependency are still present but nothing invokes Jest anymore.\n\n**Left for the next sessions**\n- Migrate the six files under `test/time/` and `test/services/` (debounce, duration, retry, http, logger, users). That's 35 tests, derived as 60 minus the 25 already passing.\n- Widen `include` back to all test files and remove the narrowing comment.\n- Delete `jest.config.js`, remove `jest` from `devDependencies`, and resync the lockfile with the same offline `npm install --package-lock-only --offline`, using a copy of `node_modules` as a fallback, since that command emptied it once.\n- Verify `npx vitest run` gives 60 passing, none skipped, and grep for leftover Jest globals or APIs across `test/`.\n- Make sure `src/` is unchanged.",
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  "result": "The `test/time/` suite is migrated and passing. Vitest now runs 47 tests across 6 files, all green, and no Jest references remain in `test/text/`, `test/time/`, or `test/setup.js`.\n\n**What changed this session**\n- **`test/time/debounce.test.js`, `duration.test.js`, `retry.test.js`**: `require` changed to `import`. Every `jest.*` call became the `vi.*` equivalent, and the Vitest globals are imported explicitly. Test bodies are otherwise unchanged.\n- **One test rewritten:** `retry.test.js` had `sleep resolves after the delay (done callback)`. Vitest 3 rejects the `done` callback style, so I converted it to an async test that asserts the promise resolves after advancing fake timers by 500 ms. The test is renamed to `sleep resolves after the delay`. Its assertion is equivalent, but it's a deliberate edit, not a straight translation.\n- **`vitest.config.mjs`**: `include` widened to `test/{text,time}/**/*.test.js`. It still has the temporary-narrowing comment, which needs updating in the final session.\n\n**Left for the next session**\n- Migrate the three files in `test/services/` (`http`, `logger`, `users`). That's the remaining 13 tests, derived as 60 minus 47.\n- Widen `include` to `test/**/*.test.js` and drop the temporary comment.\n- Delete `jest.config.js`, remove `jest` from `devDependencies` in `package.json`, and resync the lockfile. Use `npm install --package-lock-only --offline`, but know that it emptied `node_modules` last time. If it happens again, `npm ci --offline --ignore-scripts` restores it from the npm cache.\n- Final checks: `npx vitest run` should report 60 passing with none skipped. Grep all of `test/` for `jest`, `require(`, and `done` callbacks. Confirm `src/` is unchanged with `git diff --stat src/`.",
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  "result": "The migration is finished. `npx vitest run` passes all 60 tests across 9 files, none skipped, and `npm test` runs Vitest. Jest is gone from `package.json`, the lockfile, and the repo, and `src/` has no diff.\n\n**What changed this session**\n- **`test/services/http.test.js` and `logger.test.js`**: `require` became `import`, and `jest.*` became `vi.*`. `jest.requireActual` in the logger test is now a plain import, since nothing is mocked there.\n- **`test/services/users.test.js`**: this one needed a different approach. `vi.mock` doesn't intercept `users.js`, because it loads `./http` and `./logger` with a native CommonJS `require`, which bypasses Vitest's module graph. Without a fix, the tests made real network calls and failed. The test now loads the same CommonJS instances via `createRequire` and uses `vi.spyOn` on their methods, which `users.js` calls through property access. `src/` stays unchanged. Spies are restored after each test.\n- **Jest removal**: deleted `jest.config.js` and uninstalled `jest`, which updated `package.json` and the lockfile. The grep for `jest` across the repo, excluding `node_modules`, `.git`, and the lockfile, now returns nothing.\n- **`vitest.config.mjs`**: `include` is back to all test files, and the stale \"narrowed\" comment is gone.\n- **`npm test`** is `vitest run`, and `test:watch` is `vitest`.\n\n**Things to know**\n- I broke `node_modules` twice this session, once with `npm install --package-lock-only` in the previous session and once with `npm ci --dry-run` here. `npm ci` clears `node_modules` before doing anything, even in dry-run mode. Both times I restored it with `npm ci --offline --ignore-scripts` from the cache, and the final tests run against that restored install. Don't use `npm ci` as a check. Also, `--ignore-scripts` skipped install scripts both times, so if a native dependency needs a postinstall step, that's a possible gap.\n- The lockfile is in sync: `npm ci` installed from it with no mismatch error.\n\n**Remaining**\nNothing in the migration. Two optional follow-ups:\n- Commit the change. You haven't asked for a commit, so I left the working tree dirty.\n- Replace the native-`require` workaround in `users.test.js` if you ever decide to convert `src/services` to ESM. That's outside this task's constraint of leaving `src/` alone.",
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