session-work-log

Produces a structured session-end artifact capturing what was attempted, what changed, what blocked progress, and what the next agent or session needs to know. Machine-readable by design -- survives model swaps and cross-agent handoffs. Trigger phrases: \"write a work log\", \"session work log\", \"log this session\", \"create a handoff artifact\", \"what did we do this session\", \"session end log\".