- .gitignore: add *.egg-info/ so editable installs don't show in git status.
- pyproject.toml: add [build-system] and [tool.setuptools.packages.find]
scoped to chat*, fixing pip install -e . which was failing on data/
auto-discovery.
- CLAUDE.md: add Phase 1.5 cleanup backlog section under Phase 1 status,
capturing the small follow-ups surfaced in implementer reviews
(open_db refactor, regenerate SSE broadcast, you-activity purge,
drawer edits for deferred fields, NICE trim order).