- TASKS.md: mark FED-M1-12 done with PR/issue/tag references - MISSION-MANIFEST.md: phase=M1 complete, progress 1/7, M1 row done with PR range #470-#481, session log appended - scratchpad: Session 19 entry covering M1-09 → M1-12 with PR ledger and M1 retrospective learnings Refs #460