- Added a new built-in TTSR rule `ts-no-test-timers.md` that flags `Bun.sleep`, `setTimeout`, and `setInterval` usage in `*.test.ts` files.
- Registered `ts-no-test-timers` in the built-in rules index so it ships with default discovery providers.
- Updated builtin-defaults tests to enforce rule-name uniqueness and verify the new rule only matches in `*.test.ts` scopes.