Complete 8-step session handoff: scan for unsaved Cortex skills, create session summary file, update task files, compact MEMORY.md, check background agents, verify active modes, git sync, and deliver final report. Use this whenever ending a session, switching contexts, or the user says 'handoff', '/handoff', 'save session', 'wrap up everything', 'session end'. This is the COMPREHENSIVE session-end procedure with zero information loss. For a quick lightweight summary, use session-summary instead.