AGENTS.md git:20260924.2ce625eA

Immutable. This exact content never changes and is served at /api/v1/blob/584a6d2385620aa5.

This project uses Tink to manage Agent Skills under `.agents/skills/`.

## Testing rules

- Never write unit tests after you write code.

- Highly prefer E2E tests as the sole testing mechanism. Use them to verify complex features work. At the end of E2E tests, produce a verifiable and repeatable artifact.

- If you must test a system in isolation, first write down all the ways it could fail, then write the code.