Implement automatic detachment of user blocks that are attached to the agent during message processing. This prevents memory accumulation over time. Features: - periodic_user_block_cleanup() function to detach all user_ prefixed blocks - Configurable cleanup interval via --cleanup-interval flag (default: 10 cycles) - Cleanup can be disabled with --cleanup-interval 0 - Priority handling for cameron.pfiffer.org notifications - Priority keywords detection (urgent, priority, important, emergency) - Updated CLAUDE.md with usage examples and Letta docs link 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>