# TASK: EngStack disk reclaim (handoff sequence step 1)

Objective: Free disk on this workstation (/ is 95%, 14G free) by pruning
DANGLING Docker build cache only. Handoff doc: ~/.coordinate/CTOHandoff.md.

Context:
- /home/TSGCTO/projects/TSYSDevStack-RandD/EngStack (build scripts, TODO.md)
- docker system df today: Build Cache 109GB total, 42.7GB reclaimable;
  Images 108.2GB, 44.71GB reclaimable (do NOT touch yet)

Constraints:
- NEVER stop/remove running containers (26 SupportStack-Local demos live).
- Allowed: docker builder prune -f (dangling cache only). No -a, no
  system prune, no image prune, no volume prune.
- If free space still <20% after, write QUESTION-*.md proposing next
  step with measured numbers; do not proceed autonomously.

Deliverable(s): REPORT-*.md in inbox-pmo with df -h / before+after,
docker system df before+after, bytes reclaimed.

Priority: P1