Problem#

Mission Control periodically serves black screen with 404 on JS chunks. Root cause: stale/incomplete .next directory from failed builds leaves mismatched hashed vs unhashed chunk references.

Fix Applied#

1. Nuclear rebuild with rm -rf .next → all chunks now consistent
2. Created scripts/verify-build.sh — validates all manifest chunks exist on disk (dir mode) and all HTML-referenced chunks serve 200 (live mode)
3. Wired verify-build.sh into start.sh as a post-build gate — if verification fails, the build is rejected and restarted fresh
4. Created cron job mc-build-health-check (every 30min, Qwen, isolated) — runs live verification, alerts WhatsApp on failure

Files Changed#

• scripts/verify-build.sh (new) — build verification script
• start.sh — added post-build integrity check

✅ Fixed by Kelly in commit b9f904c. scripts/verify-build.sh created, wired into start.sh post-build.