pr-merge

name	pr-merge
description	Squash-merge with conventional commit message, delete branch, post release-note line. Refuses if any CR thread unresolved or any law violation. Triggers: merge pr, land pr, squash merge.

pr-merge

Final gate. Refuses if any precondition fails. Never merges without spec ref, CI green, all threads resolved, ≥1 approval (human or nexus-merge bot).

Pre-merge gate (ALL must pass)

#	Check	Command	Refuse on
1	CI green (required only)	wait-for-ci verdict	red, timeout
2	mergeable	gh pr view --json mergeable	NOT MERGEABLE
3	approval	gh pr view --json reviewDecision	NOT APPROVED
4	no open CR threads	GraphQL reviewThreads filter isResolved:false author coderabbitai	count > 0
5	spec ref in body	`gh pr view --json body | grep 'docs/specs\	docs/contracts'`
6	no [DECISION NEEDED] open	grep PR body + linked files	found
7	branch up to date with main	git rev-list origin/main..HEAD reachable	behind → rebase

Gate check

PR="${1:-$(gh pr view --json number -q .number)}"
OWNER=$(gh repo view --json owner -q .owner.login)
REPO=$(gh repo view --json name -q .name)

OPEN=$(gh api graphql -F owner="$OWNER" -F repo="$REPO" -F pr="$PR" -f query='
query($owner:String!,$repo:String!,$pr:Int!) {
  repository(owner:$owner,name:$repo){pullRequest(number:$pr){
    reviewThreads(first:100){nodes{
      isResolved comments(first:1){nodes{author{login}}}
    }}
  }}
}' | jq '[.data.repository.pullRequest.reviewThreads.nodes[]
       | select(.isResolved==false)
       | select(.comments.nodes[0].author.login=="coderabbitai")] | length')

[ "$OPEN" -gt 0 ] && { echo "REFUSE: $OPEN open CR threads"; exit 1; }

VIEW=$(gh pr view "$PR" --json mergeable,reviewDecision,body,title,headRefName)
echo "$VIEW" | jq -e '.mergeable=="MERGEABLE" and .reviewDecision=="APPROVED"' \
  || { echo "REFUSE: gates not met"; exit 2; }
echo "$VIEW" | jq -r .body | grep -E 'docs/(specs|contracts)/' >/dev/null \
  || { echo "REFUSE: no spec ref"; exit 3; }

Squash merge

TITLE=$(gh pr view "$PR" --json title -q .title)
BODY=$(gh pr view "$PR" --json body -q .body)

# Conventional Commits squash message
MSG="${TITLE}

$(echo "$BODY" | sed -n '/## Spec/,/^##/p' | grep -E 'docs/(specs|contracts)/')

Closes #${PR}"

gh pr merge "$PR" \
  --squash \
  --delete-branch \
  --subject "$TITLE" \
  --body "$MSG"

Auto-merge variant (when waiting on a still-pending check)

gh pr merge "$PR" --auto --squash --delete-branch

GitHub will auto-merge once gates flip.

Post-merge

# 1. Confirm
gh pr view "$PR" --json state,mergedAt,mergeCommit

# 2. Hand off to pr-changelog
claude-skill pr-changelog "$PR"

# 3. Release-note one-liner (stdout)
echo "- $(echo "$TITLE" | sed 's/^[a-z]*\(([^)]*)\)*:\s*//') (#${PR})"

Refuses (table-driven errors)

Code	Reason	Fix
1	open CR threads	coderabbit-resolve first
2	gates not met	wait-for-ci + request review
3	no spec ref	edit PR body, add docs/specs/...
4	branch behind main	pr-rebase-and-recover
5	law violation	route to principle-keeper

Branch protection alignment

This skill assumes main has branch protection requiring: ≥1 approval, all required checks green, dismiss stale reviews on push, require conversation resolution. Set via gh api -X PUT /repos/:owner/:repo/branches/main/protection (see docs/guides/github-graphql-cookbook.md).

Output (JSON)

{
  "pr": 123,
  "merged": true,
  "merge_sha": "abc123",
  "deleted_branch": "feat/shadow-maps",
  "release_note": "- add cascaded shadow maps (#123)"
}

Refs

• docs/guides/merge-system.md (Agent 16 — nexus-merge bot integration)
• docs/guides/pr-protocol.md (Agent 16)
• https://cli.github.com/manual/gh_pr_merge