Document completed Phase 4 implementation with test results, verification output, and backwards compatibility notes. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
Document completed Phase 4 implementation with test results, verification output, and backwards compatibility notes. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>