## Slice λ test-veracity audit by Codex (round 1)

### Mutation probe results

| Probe | Mutation applied | Cited test | Observed |
|---|---|---|---|
| Lα | Weakened `sanitizeWorktreeName`: removed reserved-dot / leading-dot / `..` checks and allowed `/` + `\` in `NAME_PATTERN`. | `worktree-manager.test.ts` `"rejects '.' and '..'"`; `"rejects names containing forward or back slashes"`; regressions `Lα-1`. | RED: `worktree-manager.test.ts` `1 failed \| 25 skipped` for `"rejects '.' and '..'"`, assertion `expected function to throw an error, but it didn't` at `sanitizeWorktreeName(".")`; RED: `1 failed \| 25 skipped` for slash test, same assertion at `sanitizeWorktreeName("foo/bar")`; RED: regressions `1 failed \| 22 skipped`, same assertion at `sanitizeWorktreeName("..")`. After `git checkout -- src/worktree-manager.ts`, all three cited commands were GREEN: each reported `1 passed` with the rest skipped. |
| Lβ | In `createWorktree`, set `resolvedRef = refArg` and skipped `git rev-parse --verify`. | `worktree-manager.test.ts` `"resolves ref to a 40-char SHA"`; regressions `Lβ-1`. | RED: `worktree-manager.test.ts` `1 failed \| 25 skipped`, assertion `expected 'HEAD' to match /^[0-9a-f]{40}$/`; RED: regressions `1 failed \| 22 skipped`, same assertion with received `"HEAD"`. After restore, both cited commands were GREEN: each reported `1 passed`. |
| Lγ | In `resolveWorktreeForRequest`, disabled the `updateSessionMetadata(sessionId, { worktreePath, worktreeName })` call. | Regressions `Lγ-1`. | RED: `1 failed \| 22 skipped`; assertion `expected undefined to be '/tmp/lambda-reg-HiEspH/.worktrees/85f45e43f0ae4f88871ce431b72b0e80'` at `after.metadata?.worktreePath`. After `git checkout -- src/index.ts`, GREEN: `1 passed \| 22 skipped`. |
| Lδ | In `resolveWorktreeForRequest`, skipped the session-metadata reuse branch. | Regressions `Lδ-1`. | RED: `1 failed \| 22 skipped`; assertion expected second worktree path to equal first path, but received a different UUID path under the same temp repo (`.../7b3c2963...` vs `.../8c62e8da...`). After restore, GREEN: `1 passed \| 22 skipped`. |
| Lε | In `FileSessionManager.deleteSession`, disabled `this.invokeCleanupHook(session)`. | Regressions `Lε-1`. | RED: `1 failed \| 22 skipped`; assertion `expected "vi.fn()" to be called 1 times, but got 0 times`. After `git checkout -- src/session-manager.ts`, GREEN: `1 passed \| 22 skipped`. |
| Lζ | In `executeCli`, passed `cwd: undefined` into `spawnCliProcess` instead of the requested cwd. | `executor.test.ts` `"should use specified working directory"`; regressions `Lζ-1`. | RED: `executor.test.ts` `1 failed \| 36 skipped`, assertion expected `/tmp` but received the audit worktree cwd; RED: regressions `1 failed \| 22 skipped`, assertion expected `/tmp/lambda-reg-cwd-M9ZWlN` but received the audit worktree cwd. After `git checkout -- src/executor.ts`, both cited commands were GREEN: each reported `1 passed`. |
| Lη | Added bogus `args.push("-w")` to all five prepare paths to exercise the full Lη matrix. | Regressions `Lη-1` through `Lη-5`. | RED: `5 failed \| 18 skipped`; each failure was `expect(prep.args).not.toContain("-w")`, with received args containing `-w` for Claude, Codex, Gemini, Grok, and Mistral. After `git checkout -- src/index.ts`, GREEN: `5 passed \| 18 skipped`. |
| Lθ | In `AsyncJobManager.buildRequestKey`, omitted `cwd` from the dedup key by setting `extra = withStdin`. | Regressions `Lθ-1`. | RED: `1 failed \| 22 skipped`; assertion `expected true to be false` for `b.deduped`, meaning two different cwd values collided. After `git checkout -- src/async-job-manager.ts`, GREEN: `1 passed \| 22 skipped`. |
| Lψ | In `formatWorktreePrefix`, changed the prefix to `worktree=<path>` and removed the trailing newline. | Regressions `Lψ-1`. | RED: `1 failed \| 22 skipped`; assertion expected `"[gateway] worktree=/tmp/wt-1\n"` but received `"worktree=/tmp/wt-1"`. After `git checkout -- src/index.ts`, GREEN: `1 passed \| 22 skipped`. |

### Build / test / format / oracle / worktree-list

Observed clean-tree commands:

```text
npm run build
exit 0

npm test
Test Files  59 passed (59)
Tests       989 passed (989)

npm run format:check
All matched files use Prettier code style!
```

Contract-gate negative oracle:

```text
validateUpstreamCliArgs("claude", ["-p", "hello", "-w"])
{
  "ok": false,
  "violations": [
    {
      "cli": "claude",
      "arg": "-w",
      "index": 2,
      "message": "Unsupported claude CLI flag \"-w\" for bundled upstream contract"
    }
  ]
}
```

Post-run worktree observations:

- `git branch --list 'gateway/*'` printed no branches.
- `git worktree list --porcelain` showed no test-created `gateway/<name>` worktrees left behind.
- The porcelain list did show pre-existing non-test reviewer worktrees in this shared checkout: main `feat/phase-4-slice-lambda`, detached `/home/werner/.gemini/tmp/llm-cli-gateway/wt`, locked `.claude/worktrees/agent-acf088e731a6faa3a`, my `.worktrees/audit-codex`, `.worktrees/audit-gemini`, `.worktrees/audit-grok`, `.worktrees/audit-mistral`, `/tmp/lambda-audit-codex`, and `/tmp/lambda-audit-mistral`.

Read-first observations:

- `docs/plans/slice-lambda.spec.md` is 362 lines and defines the gateway-owned worktree lifecycle: create under `<repo-root>/.worktrees/<name>`, spawn with `cwd`, persist `metadata.worktreePath`, cleanup on session delete/TTL, and never emit provider `-w`.
- `src/worktree-manager.ts` is 277 LOC and implements sanitizer, rev-parse-before-add, `gateway/<name>` branch creation, registered-worktree reuse, collision detection, and best-effort removal.
- `src/__tests__/worktree-manager.test.ts` is 366 LOC with 26 tests; `src/__tests__/test-veracity-regressions-slice-lambda.test.ts` is 480 LOC with 23 tests.
- Per-CLI wiring commits observed in `git log --oneline master..HEAD`: Gemini `bd5e857`, Claude `9571161`, Codex `dfc3adb`, Grok `91d4f52`, Mistral `dede767`. Each `git show <SHA> -- src/index.ts` showed the corresponding sync+async tool schema wiring, `resolveWorktreeForRequest`, cwd threading, and response `worktreePath` prefix/async field additions.

### Findings

No test-veracity blockers found. Each cited assertion went RED under its corresponding implementation mutation and returned GREEN after restoring the mutated file.

Residual observation: the post-run porcelain worktree list is not limited to this audit worktree plus test-created `gateway/*` entries because this shared repository already contains other reviewer worktrees. I did not remove or modify them. No `gateway/*` branches remained after my test run.

### Approval — **UNCONDITIONAL APPROVE**
