- Replaced plan:// protocol with notes:// for session-scoped artifact storage and plan finalization.
- Added title parameter to exit_plan_mode tool to enable plan file renaming during approval workflow.
- Implemented NotesProtocolHandler for notes:// URL scheme with path traversal protection and session fallback.
- Added renameApprovedPlanFile function to handle plan artifact finalization with validation and error handling.
- Updated system prompt documentation to reference notes:// protocol and internal URL schemes for artifact access.