feat(core): add 8 AGENTS.md files (package, layer, domain levels)

packages/core/src/infrastructure/AGENTS.md

@@ -0,0 +1,24 @@
+# Infrastructure Layer — Implementations
+
+## Rules
+
+- Implements interfaces from application/
+- Imports from application/ and entities/
+- NEVER imported by application/ or entities/
+- Can import external libraries (Drizzle, Better Auth, Sentry, etc.)
+- Can import @repo/cms-client
+- Always provide a mock implementation for every real implementation
+
+## Naming
+
+- Real: `{provider}-{name}.repository.ts` (e.g., `payload-users.repository.ts`)
+- Mock: `mock-{name}.repository.ts`
+- All implementations must use `@injectable()` decorator for InversifyJS
+
+## Adding a New Implementation
+
+1. Create `src/infrastructure/repositories/{provider}-{name}.repository.ts`
+2. Implement the interface from application/
+3. Add `@injectable()` decorator
+4. Create corresponding mock: `mock-{name}.repository.ts`
+5. Register both in DI module (production binds real, test binds mock)