Git Vs Plan Drift Check

You are checking whether the git repository has drifted from the baseline commit recorded in a plan.

Baseline commit: $0 Plan file: $1

Steps

1. Run git rev-parse --short HEAD to get the current HEAD commit
2. Compare it to $0

If they match: respond concisely — no drift, HEAD is at the baseline commit. Stop here.

If they differ:

3. Run git log --oneline $0..HEAD to see what commits were added since the baseline
4. Read the plan file at $1
5. Identify files and components referenced in the plan's implementation steps
6. Run git diff $0..HEAD -- <those files> to see what changed in plan-relevant code
7. Report the findings

Response format

Always open with a one-liner: either "No drift — HEAD is at $0" or "N commit(s) ahead of $0: <short log>".

If there is drift, follow with: