Here's a skill you can run once to set up deep modules in any TypeScript codebase: - Each 'package' lives at src/packages/<name> (name/path is totally customizable) - From outside the package, you can only import from <name>/index.ts - Tests for the package live at <name>/tests, and can only import from index.ts - No circular dependencies between packages - Puts a context pointer inside AGENTS.md so the agent knows about it (no skills needed) - Works with frontend or backend code (even Effect…