- Four persona templates: default, brainstorm, planner, research
- JSON schema: name, description, system_prompt, settings
- Each persona has distinct system_prompt for different modes
- Settings include model and max_turns configuration
- Fix SessionManager paths to use homelab directory
- SessionManager class with session lifecycle management
- Session CRUD: create, list, switch, get, update
- Session validation: alphanumeric, hyphens, underscores only
- Persona inheritance from library on session creation
- Session status tracking: idle, active, suspended
- Metadata persistence with JSON on disk
- Active session tracking and switching logic
