Brief final-close pass: logged today's memory-pipeline entry (K311) to clear the CHECKPOINT warning, restored full handoff content after confirming an intervening machine-generated regeneration at 2:02am had blanked the active_work/completed sections. No new build work this pass -- pure close-discipline cleanup.

Logged K311 (CLOSE.php shrink-guard gap documentation). Verified and restored full handoff-40.md content, filling in ACTIVE WORK and COMPLETED sections that an intervening automated regeneration had left blank while preserving the accurate BOOKMARK and DO NOT TOUCH sections already present.