# Tasks: enterprise-react-error-boundary

**Change ID**: enterprise-react-error-boundary
**Package**: `@suaveplan/react-error-boundary`
**Target path**: `react/ui/react-error-boundary`
**Prerequisite packages on Verdaccio**: `@suaveplan/error`, `@suaveplan/react-translate`

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## 0. Pre-flight (non-negotiable)

- [ ] 0.1 Confirm clean working tree (`git status` reports nothing) and no in-flight worktrees with uncommitted work (`git worktree list` then `git status` in each)
- [ ] 0.2 If any worktrees exist under `.claude/worktrees/`, account for each one: still-active agent, work-pending-merge, or stale-and-prune. Stale worktrees MUST be removed (`git worktree remove`) before opening a new one — code that has been lost twice on main is the failure mode this guards against.
- [ ] 0.3 Confirm the package set in `MANIFEST.md` matches `find packages -maxdepth 3 -name package.json` count. Drift here means a prior change archived without regenerating the manifest.

## 1. Scaffold

- [ ] Create directory tree per proposal layout.
- [ ] Write `package.json` at `0.1.0` with `"sideEffects": false`, exports map.
- [ ] Dependencies: `@suaveplan/error workspace:^`, `@suaveplan/react-translate workspace:^`, `@opentelemetry/api catalog:observability`, `tslib catalog:build`.
- [ ] Write `tsconfig.json`, `vitest.config.ts`, scripts.

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## 2. Types

- [ ] Define `FallbackProps`: `{ error: Error; resetErrorBoundary: () => void }`.
- [ ] Define `ErrorBoundaryProps`: `children`, `fallback?: ReactNode`, `FallbackComponent?: ComponentType<FallbackProps>`, `onError?: (error, info) => void`, `onReset?: () => void`, `resetKeys?: unknown[]`.
- [ ] Define `ErrorBoundaryState`: `{ hasError: boolean; error: Error | null }`.
- [ ] Define `UseErrorBoundaryReturn`: `{ showBoundary: (error: Error) => void }`.

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## 3. DefaultFallback

- [ ] Renders translated "Something went wrong" heading + error message (dev-only) + "Try again" button calling `resetErrorBoundary`.
- [ ] Uses `useTranslation` from `@suaveplan/react-translate`.
- [ ] Write `default-fallback.test.tsx`: renders heading, button calls reset. `{ timeout: 5000 }`.
- [ ] Write `default-fallback.stories.tsx`: default, with-error-message, playground.
- [ ] Write `default-fallback.md`.

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## 4. ErrorBoundary

- [ ] Class component with `static getDerivedStateFromError(error)` and `componentDidCatch(error, info)`.
- [ ] `componentDidCatch` — calls `this.props.onError(error, info)`; emits OTel span event `error_boundary.caught` with attributes `error.message`, `error.type`, and `error.code` (if `error instanceof SuaveplanError`).
- [ ] `resetKeys` watching via `componentDidUpdate` — if any `resetKeys[i]` changed value, call `reset()`.
- [ ] Renders `FallbackComponent` if provided, else `fallback` prop, else `DefaultFallback`.
- [ ] Write `error-boundary.test.tsx`: catch + fallback rendered, reset clears error, onError called, onReset called, resetKeys trigger reset, FallbackComponent receives props. `{ timeout: 5000 }`.
- [ ] Write `error-boundary.stories.tsx`: default (forced throw), custom FallbackComponent, resetKeys, playground.
- [ ] Write `error-boundary.md` (≥200 words).

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## 5. useErrorBoundary hook

- [ ] Uses `useState` to hold a thrown error; throws it in render via `useEffect` → nearest boundary catches it.
- [ ] Returns `{ showBoundary: (error: Error) => void }`.
- [ ] Write `use-error-boundary.test.tsx`: calling `showBoundary` causes boundary to catch. `{ timeout: 5000 }`.
- [ ] Write `use-error-boundary.stories.tsx`: playground (button calls `showBoundary`).
- [ ] Write `use-error-boundary.md`.

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## 6. E2E

- [ ] `e2e/error-boundary.spec.ts` — Playwright:
  - Render component that throws on click → `DefaultFallback` shown.
  - Click "Try again" → component re-mounts without error.
  - `FallbackComponent` renders with correct `error.message`.

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## 7. Verify and publish

- [ ] `bunx turbo lint typecheck test --filter=@suaveplan/react-error-boundary` — green.
- [ ] `bunx turbo test:coverage --filter=@suaveplan/react-error-boundary` — 100%.
- [ ] `bun scripts/publish.ts --package @suaveplan/react-error-boundary`.
- [ ] Archive change folder.