Rename-vs-edit conflict: task 13 (landed) moved the workflow brief to AGENTS.md leaving CLAUDE.md as a pointer, while this branch had edited the brief's work-launch section in place. Resolution: CLAUDE.md keeps main's pointer form; this branch's documentation of the branch-from-origin behaviour moved verbatim into AGENTS.md where that text now lives. agents.py and the rest auto-merged; 103 tests green. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>