Skill: Diagnose a Red Run

Capture the branch failure

• Record the exact command, commit SHA, exit code, and passed/failed/skipped counts. Quote the first actionable failure; do not summarize it away.
• Classify the check: testkit spec, unit suite, typecheck, build, lint, or CI job.

Run a clean control

Never call a failure pre-existing from memory or from a modified checkout.

git fetch origin dev
git worktree add /tmp/openwork-dev-control --detach origin/dev
# In that clean worktree, prepare the same prerequisites and run the exact command.
git worktree remove /tmp/openwork-dev-control