- Update docs/vcr-testing.md with new PII sanitization features - Document transport_helpers.inject_transport() for simpler test setup - Add sanitize_cassettes.py script documentation - Update file structure to include all new components - Fix PEP 8: Move copy import to top of openai_compatible.py - Enhance security notes about automatic sanitization 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>