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- Add .claude/ to .gitignore and untrack settings.local.json - Create .dockerignore to exclude docs, extension, analysis, scripts, node_modules, and other noise from the Docker build context - Dockerfile: Node 20→22-alpine, Python 3.11→3.13-slim, DEBIAN_FRONTEND set, pip upgrade before install - Track frontend/package-lock.json for reproducible builds - Update summary.md: date, db.py in project structure, superseded column in schema, two new key patterns (12/13), full 2026-03-19 changelog Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>