## First-time setup

**At the start of every new session, read all of the following files before doing anything else:**

- `CLAUDE.md` (this file)
- `AGENTS.md`
- `PROJECT.md`
- `CHANGELOG.md`
- `DESIGN_DOCUMENT*.md` (`DESIGN_DOCUMENT.md`, `DESIGN_DOCUMENT_MODULE.md`, `DESIGN_DOCUMENT_LIB.md` or `DESIGN_DOCUMENT_GODOT.md`)