# Release Readiness Verdict - 0.12.1

Date: **2026-04-07**
Target version: **0.12.1**
Comparison base: **`v0.12.0..HEAD`**
Verdict: **GO** ✅

`0.12.1` is the accumulated `v0.12.0..HEAD` patch train: team status JSON hygiene, interactive worker PID integrity, launch-safe orphan cleanup, direct-launch follow-through, notify-fallback hardening, prompt tightening, and release-collateral alignment.

## Scope reviewed

- team mailbox delivery idempotence, leader-mailbox trigger guidance, and interactive worker PID capture (`src/team/state/mailbox.ts`, `src/team/runtime.ts`, `src/team/__tests__/state.test.ts`, `src/team/__tests__/runtime.test.ts`)
- direct leader launch defaults and launch-safe orphan cleanup (`src/cli/index.ts`, `src/cli/cleanup.ts`, `src/cli/__tests__/index.test.ts`, `src/cli/__tests__/cleanup.test.ts`)
- notify-fallback watcher hardening (`src/scripts/notify-fallback-watcher.ts`, `src/hooks/__tests__/notify-fallback-watcher.test.ts`)
- release metadata, prompt collateral, and release docs (`package.json`, `package-lock.json`, `Cargo.toml`, `CHANGELOG.md`, `RELEASE_BODY.md`, `docs/release-notes-0.12.1.md`, `prompts/information-architect.md`)

## Validation evidence

| Check | Command | Result |
|---|---|---|
| Build | `npm run build` | PASS |
| Targeted lint | `npx biome lint src/cli/index.ts src/cli/cleanup.ts src/cli/__tests__/index.test.ts src/cli/__tests__/cleanup.test.ts src/scripts/notify-fallback-watcher.ts src/hooks/__tests__/notify-fallback-watcher.test.ts src/team/runtime.ts src/team/state/mailbox.ts src/team/__tests__/runtime.test.ts src/team/__tests__/state.test.ts package.json` | PASS |
| CLI regression suite | `node --test dist/cli/__tests__/cleanup.test.js dist/cli/__tests__/index.test.js dist/cli/__tests__/version-sync-contract.test.js` | PASS |
| Notify fallback regression suite | `node --test dist/hooks/__tests__/notify-fallback-watcher.test.js` | PASS |
| Team runtime/state regression suite | `node --test dist/team/__tests__/state.test.js dist/team/__tests__/runtime.test.js` | PASS |
| Packed-install smoke | `npm run smoke:packed-install` | PASS |

## Final verdict

Release **0.12.1** is **ready for branch push and PR handoff** on the basis of the verified `v0.12.0..HEAD` patch scope above.
