feat: add CF Workers + Hono + Angular SaaS instructions

Author: ProfessorManhattan

instructions/cloudflare-workers-hono-angular-saas.instructions.md

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+---
+applyTo: "**/*.ts"
+---
+
+# Cloudflare Workers + Hono + Angular SaaS
+
+Full-stack SaaS on Cloudflare Workers with Hono API, Angular frontend, and enterprise integrations.
+
+## Stack
+CF Workers+Hono v4.12+ | Angular 21+Ionic 8+PrimeNG 21 | D1/Neon | Drizzle v1 | Zod | Clerk Core 3 | Stripe | Inngest v4 | Resend | Bun 1.3 | Playwright v1.59+ | Vitest
+
+## TypeScript
+- Strict mode, never `any` (use `unknown`), prefer `interface` over `type`
+- `readonly` when not reassigned, `undefined` over `null`
+- Zod as source of truth for validation
+- ESLint flat config + typescript-eslint + Prettier
+
+## Hono API
+- Inline handlers for RPC type inference (never separate controller files)
+- Method chaining: `app.use().get().post()` preserves types
+- `hc<AppType>(BASE_URL)` for typed client
+- `@hono/zod-validator` on ALL request bodies
+- `app.onError()` + `app.notFound()` centralized
+- Split: `app.route('/path', subApp)`
+- Error: `{ error: string, code?: string, details?: unknown }`
+- `createFactory<{ Bindings: Env }>()` for reusable middleware
+- `GET /health` returns `{ status, version, timestamp }`
+
+## Angular 21
+- Standalone only, zoneless by default
+- Signals: `signal()`, `computed()`, `effect()`, `linkedSignal()`, `resource()`
+- `HttpResource` for data fetching
+- Control flow: `@if`/`@for`/`@switch`/`@defer`
+- kebab-case files, `providedIn: 'root'`, PrimeNG
+
+## Drizzle v1 + D1
+- `sqliteTable`, plural snake_case tables
+- `$inferSelect`/`$inferInsert` for types
+- Batch API (D1 doesn't support transactions)
+- Prepared statements for repeated queries
+
+## CF Workers
+- `ctx.waitUntil()` for post-response work
+- `ctx.passThroughOnException()` for graceful degradation
+- Bindings typed via `Env` interface
+
+## Inngest v4
+- `eventType()` per-event with Zod schema
+- `inngest/cloudflare` adapter for Workers
+- `step.ai.infer()` offloads inference
+
+## Testing (TDD)
+- Failing test FIRST
+- Playwright 6 breakpoints (375, 390, 768, 1024, 1280, 1920)
+- Vitest for units
+- No sleeps, `data-testid` selectors, axe-core
+
+## Security
+- HSTS, CSP (nonce-based), COOP, COEP, CORP
+- Turnstile + Zod on all forms
+- Clerk JWT auth, webhook sync to D1
+
+## Quality
+- Lighthouse a11y ≥95, perf ≥75
+- WCAG 2.2 AA, LCP ≤2.5s, CLS ≤0.1
+
+Source: [megabytespace/claude-skills](https://github.com/megabytespace/claude-skills)