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openspec/changes/enterprise-react-error-boundary/proposal.md

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+# OpenSpec Change: enterprise-react-error-boundary
+
+- **Change ID**: enterprise-react-error-boundary
+- **Package**: `@suaveplan/react-error-boundary`
+- **Category**: react
+- **Target path**: `react/ui/react-error-boundary`
+- **Status**: PROPOSED
+- **Date**: 2026-04-24
+- **Reference spec**: `/mnt/s/web/suaveplan/enterprise/react-error-boundary.md`
+
+---
+
+## Summary
+
+Deliver `@suaveplan/react-error-boundary` on genesis from scratch at enterprise quality. A React class-component error boundary: `ErrorBoundary` (fallback/FallbackComponent/onError/onReset/resetKeys), `DefaultFallback`, and `useErrorBoundary` hook. Genesis adds `@suaveplan/error` integration, OTel span-event capture on catch, i18n for default fallback copy, Storybook stories, and Playwright E2E.
+
+---
+
+## Current-state audit (genesis)
+
+Package does not exist on genesis — fresh build.
+
+---
+
+## Available workspace deps on genesis
+
+| Package | Role |
+|---|---|
+| `@suaveplan/error` (`workspace:^`) | `SuaveplanError` type narrowing in `onError` |
+| `@suaveplan/react-translate` (`workspace:^`) | i18n for `DefaultFallback` copy |
+| `@opentelemetry/api` (`catalog:observability`) | Span event `error_boundary.caught` |
+
+External: `tslib catalog:build`. React 18 peer.
+
+---
+
+## Preserved public API surface
+
+```ts
+ErrorBoundary         — getDerivedStateFromError + componentDidCatch, resetKeys, onError, onReset
+DefaultFallback       — minimal error UI with "Try again" button
+useErrorBoundary      — programmatic throw into nearest boundary
+
+// Types
+ErrorBoundaryProps, ErrorBoundaryState, FallbackProps, UseErrorBoundaryReturn
+```
+
+---
+
+## New additions for genesis
+
+1. **OTel `error_boundary.caught` span event** — attributes: `error.message`, `error.code` (if `SuaveplanError`), `error.type`.
+2. **i18n `DefaultFallback`** — "Something went wrong", "Try again" via `useTranslation`.
+3. **Storybook** — `ErrorBoundary` default (forced throw), `useErrorBoundary` playground, `DefaultFallback` standalone, custom `FallbackComponent`.
+4. **Playwright E2E** — render a component that throws; verify fallback shown; click "Try again"; verify reset.
+
+---
+
+## File layout
+
+```text
+react/ui/react-error-boundary/
+  package.json
+  tsconfig.json
+  vitest.config.ts
+  src/
+    index.ts
+    components/
+      error-boundary/ (tsx + types + md + test + stories + index)
+      default-fallback/ (tsx + types + md + test + stories + index)
+    hooks/
+      use-error-boundary/ (ts + types + md + test + stories + index)
+  e2e/
+    error-boundary.spec.ts
+```

openspec/changes/enterprise-react-error-boundary/tasks.md

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+# 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`
+
+---
+
+## 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.
+
+---
+
+## 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 }`.
+
+---
+
+## 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`.
+
+---
+
+## 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).
+
+---
+
+## 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`.
+
+---
+
+## 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`.
+
+---
+
+## 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.