work_done
Series F opened; built checklist.php, roster fixes (D110), commands architecture reconciled with Server (D112/D115), transfer length safety (D113), self-improvement prompts (D114), EXEC_OPEN Series F for all 11 (D116); investigated and fixed 05-Front_end disappearance response — protected paths guard (D118), full platform SNAPSHOT.php (D119), BACKUP.php (D120), RESTORE.php proven end-to-end (D121); fixed backups/ exclusion bug (D122); added mid-session save to REFRESH (D123); removed incorrect auto-snapshot trigger from BACKUP (D124). Standing task list written to knowledge-01.md for David to add to going forward.