Update CLAUDE.md

Author: niechen

CLAUDE.md

@@ -2,6 +2,12 @@
 
 This file contains conventions that Claude should follow when working on this project.
 
-- **Formatting:** Always format Python code with `ruff`.
 - **Dependency Management:** Use `uv` for all Python dependency management.
-- **Committing:** Always double-check with the user before committing changes to git.
+- **Python Environment:** You are in the uv `.venv` Python environment. All dependency code can be found in `.venv/`.
+- **Formatting:** Always format Python code with `ruff`.
+- **Committing:** 
+  - NEVER commit anything to git unless explicitly asked to do so.
+  - Always double-check with the user before committing changes to git.
+  - This project follows semantic release - commit messages MUST follow Conventional Commits format.
+  - Examples: `feat:`, `fix:`, `docs:`, `style:`, `refactor:`, `perf:`, `test:`, `chore:`
+  - BREAKING CHANGES: Adding `BREAKING CHANGE:` in the commit footer triggers a major release. This is very uncommon - NEVER do this unless explicitly told to do so.