create-prove

${var} - Required immutable target in the form owner/repo#pr@40-character-lowercase-sha.

Today is ${today}. Prove the behavior of one Aeon-shaped change by running the changed skill through the target repository's real aeon.yml workflow. A green diff review is not proof. A successful, correlated Actions run is proof.

Scope

This first implementation supports Aeon-shaped pull requests that change exactly one runnable skills/<slug>/SKILL.md. It does not launch conventional applications and it does not guess which skill represents a workflow-only or configuration-only change. Unsupported target shapes must fail closed without posting a proof receipt.

Never prove create-prove by recursively dispatching itself. Exit PROVE_UNSUPPORTED instead.

Steps

Parse ${var} into target=owner/repo#pr and expected_sha. Reject any value outside the exact grammar above with PROVE_INVALID_TARGET.
Read the PR through gh api. Require all of the following:
- the PR is open;
- its current head.sha equals expected_sha;
- its head branch belongs to the same repository, because gh workflow run --ref cannot execute an untrusted fork branch in the base repository;
- exactly one changed path matches skills/<slug>/SKILL.md;
- the slug is not create-prove. Any mismatch exits PROVE_UNSUPPORTED or PROVE_STALE without a receipt.
Inspect the changed skill's frontmatter and instructions. Choose the smallest real, non-destructive variable that exercises the changed behavior. If no safe real invocation exists, exit PROVE_UNSAFE rather than inventing evidence. Do not use synthetic credentials or a dry-run mode.
Dispatch the target branch's workflow by filename, with a unique correlation ID whose dispatch_id must start with the literal prefix prove- — .github/workflows/aeon.yml's commit-skip guard only recognizes that exact prefix to know this run is being proved, not a normal dispatch, and must not commit or push to the branch it's proving. Getting this prefix wrong silently defeats the immutable-head guarantee this whole skill exists to provide:
```
dispatch_id="prove-${pr_number}-$(date -u +%Y%m%dT%H%M%SZ)-${RANDOM}"
gh workflow run aeon.yml --repo "$repo" --ref "$head_branch" \
  -f skill="$skill" -f var="$proof_var" -f dispatch_id="$dispatch_id"
```
Discover the run only by the exact correlated run title, using the same rule as chain-runner.yml. Never select merely the newest run for that skill.
Wait up to 30 minutes. Require status=completed and conclusion=success. Fetch the run log and the captured skill output. Confirm the output is non-empty and does not contain _No output captured._. A successful Actions wrapper with no captured behavior is PROVE_MISSING_EVIDENCE.
Re-read the PR and require its head SHA still equals expected_sha.
Post one PR comment containing a concise description of the exercised path, the run URL, a short output excerpt, and exactly one final machine receipt:
```

```
Construct the JSON with jq -cn, then render it on one line. Do not post the receipt until every gate above passes.
End with the target, skill, run ID, run URL, and PROVE_VERDICT=proven in the captured output.

Constraints

The proof run must execute the PR head branch, not main.
Never treat CI checks, source inspection, or the prior review receipt as behavioral evidence.
Never post a proven receipt for a failed, cancelled, timed-out, stale, empty-output, unsupported, or unsafe run.
Do not merge, close, approve, or modify the target PR.
Do not commit repository files.

Network note

Use gh for every GitHub read, dispatch, log fetch, and PR comment. Authentication is provided by the workflow. Never print tokens or place secret values on a command line.

Log

Append the result to memory/logs/${today}.md under ### create-prove, including the target, SHA, selected skill, evidence run ID, and terminal verdict. The workflow may persist the captured output on your behalf.

About this skill

Scope

Steps

Constraints

Network note

Log