Read ../../references/runtime-guide.md. Call get_skill_content with resources: ["architecture", "session-management"].
Workflow
- Check for an active session; if none exists, inform the user there is nothing to archive
- Present a brief summary of what will be archived (session ID, task, phase progress)
- Ask the user to confirm archival (the session may have incomplete phases)
- Move the active session file into the state archive directory
- Move the associated design and implementation plan files into the plans archive directory
- Verify that no active-session file remains and report the archived paths