Api Change Guard

Use this skill for any backend interface change in apps/api.

Required Checks

1. Read CLAUDE.md sections on architecture red lines, cross-end rules, and recent pitfalls.
2. Search for every affected path, schema, and field with rg.
3. Check router registration order in apps/api/src/lucidpanda/api/v1/main.py and any app bootstrap file.
4. Check whether the change affects Web, iOS, tests, or legacy compatibility routes.
5. Check whether apps/api/tests/conftest.py contains hand-written SQLite tables that need matching columns.

Execution Order

1. Update request/response models first.
2. Update route implementation second.
3. Add compatibility route or compatibility fields if old callers still exist.
4. Update tests and test fixtures.
5. Run targeted tests first, then full make check.