PR Comment Responder

PURPOSE: Process reviewer feedback into fixes, replies, and resolved threads. Every unresolved PR comment thread should end this session resolved.

GIT HOST: Commands in this skill use GitHub (gh) as the default. If git-host in jig.config.md is not github, read framework/GIT_HOST.md for the platform-specific command equivalents.

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Mission

Analyze. Fix. Commit. Push. Reply. Resolve. That's the job.

FETCH unresolved comments + thread IDs
  |
ANALYZE each comment (valid fix? false positive? needs clarification?)
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For unclear ones --> ASK the user (this should be rare)
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IMPLEMENT code fixes for valid feedback
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BUILD + TEST to verify nothing broke
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COMMIT the fixes
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PUSH to remote
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REPLY to each comment on GitHub
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RESOLVE every addressed thread

The pipeline is not optional. Do not stop after implementing fixes. Do not stop after committing. The job is not done until replies are posted and threads are resolved on GitHub. A comment without a reply and resolution is unfinished work.

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Decision Rules

Most comments have obvious solutions. Act on them directly:

Comment Type	Action
Valid bug / missing guard	Fix it, reply with commit ref
Style / pattern suggestion	Fix it, reply confirming
False positive / intentional design	Reply explaining why, resolve
Question about approach	Reply with explanation, resolve
Genuinely ambiguous or risky	Ask user before acting (rare)

Default to action. Only ask the user when the fix would be architecturally risky, when you genuinely do not understand the feedback, or when the commenter's suggestion conflicts with existing patterns.

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Prerequisites

GitHub CLI (gh) must be installed and authenticated. Verify with gh auth status.

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Step 1: Fetch PR Info + Unresolved Comments + Thread IDs

Run these in parallel. You need REST comment IDs (for replying) and GraphQL thread IDs (for resolving).

Get PR info:

gh pr view --json number,url,title,body

Extract owner/repo from git remote get-url origin. Use in all gh api calls below.

Fetch PR comments (REST -- for replying):

gh api repos/{owner}/{repo}/pulls/{pr_number}/comments \
  --jq '.[] | {id: .id, path: .path, line: .line, body: .body, user: .user.login, created_at: .created_at}'

Fetch unresolved thread IDs (GraphQL -- for resolving):

The REST API gives you comment IDs (for replying), but resolving threads requires GraphQL thread IDs. Fetch both.

gh api graphql -f query='
{
  repository(owner: "OWNER", name: "REPO") {
    pullRequest(number: PR_NUM) {
      reviewThreads(first: 50) {
        nodes {
          id
          isResolved
          comments(first: 1) {
            nodes {
              databaseId
              body
              author { login }
            }
          }
        }
      }
    }
  }
}' --jq '.data.repository.pullRequest.reviewThreads.nodes[] | select(.isResolved == false) | {threadId: .id, commentId: .comments.nodes[0].databaseId, author: .comments.nodes[0].author.login, body: (.comments.nodes[0].body | split("\n")[0][:100])}'

Mapping threads to comments: The commentId from GraphQL matches the id from the REST comments endpoint. Use this to build a map of commentId -> threadId so you can resolve each thread after replying.

Fetch a single comment's full body:

The GraphQL query above truncates comment bodies to 100 chars. To get the full body of a specific comment:

# IMPORTANT: The path is /pulls/comments/{id} -- NOT /pulls/{pr_number}/comments/{id}
gh api repos/{owner}/{repo}/pulls/comments/{comment_id} \
  --jq '{id: .id, path: .path, line: .line, body: .body, user: .user.login}'

The single-comment endpoint drops the PR number from the path. Using /pulls/{pr_number}/comments/{id} will return a 404.

If there are no unresolved comments, say so and stop.

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Step 2: Analyze Each Comment

For each unresolved comment:

1. Read the referenced code files
2. Understand context deeply (do not skim)
3. Determine: valid fix, false positive, or needs clarification
4. If valid: plan the code change
5. If false positive: draft an explanation of why the current code is correct

Bot Comment Validation

Bot	Typical Comments	Validation Approach
cursor[bot]	Bug predictions, missing guards	~50% false positive rate. Validate against actual code paths
sentry[bot]	Security concerns, bug predictions	Deep dive required. Often valid
github-actions[bot]	CI/CD status, test results	Check actual test failures
dependabot[bot]	Dependency updates	Review changelog and breaking changes

CRITICAL: Never trust a bot's factual claims. Always verify.

Bots make assertions about code structure ("this entity doesn't have field X", "this method returns Y") that are frequently wrong. Before accepting ANY bot claim as valid:

1. Verify every factual assertion independently. If a bot says "Entity doesn't have a name column," READ the entity file and check.
2. Read the actual source files the bot references -- not just the diff lines.
3. Check related files that the bot may not have seen.
4. Only after verification: determine if the concern is valid or a false positive.
5. If valid: fix the issue and respond with what was fixed.
6. If false positive: respond explaining exactly what the bot got wrong and cite the evidence (file, line number).

The cost of a false fix is higher than the cost of extra verification. A wrong "fix" introduces a real bug where none existed.

Human Comments (Usually Actionable)

Pattern	Example	Response
Style suggestion	"Use design tokens here"	Implement and confirm
Performance tip	"Consider memoizing this"	Implement and confirm
Question	"Is this intentional?"	Explain the reasoning
Bug report	"This will fail when..."	Fix and confirm

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Step 3: Implement + Verify

For each valid fix:

1. Edit the code
2. Build: verify the project builds without errors
3. Test: run relevant tests -- must pass

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Step 4: Commit + Push

Do both. Always. A local commit without a push means the reply will reference a commit the reviewer cannot see.

# Commit the fixes (use commit agent)
# Then push immediately
git push

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Step 5: Reply + Resolve

For EACH addressed comment, do both. This is the finish line -- do not skip it.

Reply to a comment:

gh api repos/{owner}/{repo}/pulls/{pr_number}/comments/{comment_id}/replies \
  -X POST \
  -f body='Your response message here'

Important:

• Use -X POST to specify POST method
• Use -f body='...' for the response body
• Use single quotes for the body to avoid escaping issues

Resolve all addressed threads (AFTER replying):

for thread_id in PRRT_abc123 PRRT_def456 PRRT_ghi789; do
  gh api graphql -f query="mutation { resolveReviewThread(input: {threadId: \"$thread_id\"}) { thread { isResolved } } }" --jq '.data.resolveReviewThread.thread.isResolved'
done

Rules:

• Always resolve AFTER replying (so the reply is visible before resolution)
• Only resolve threads you have actually addressed
• Do not resolve threads you deferred or where you disagreed without responding
• Threads already isResolved: true can be skipped

Post top-level PR comment (optional):

Use for summarizing multiple changes across many comments:

gh pr comment {pr_number} --body "### Summary of Changes

All feedback has been addressed:
- Updated design tokens
- Fixed the race condition
- Added error handling"

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Response Style

• Friendly, lowercase, concise
• Reference the commit hash when you fixed something
• Use code formatting for technical references
• Match the commenter's energy

Good response examples

Acknowledging a fix:

good call! updated to use the design token instead of the hardcoded value

Explaining a decision:

thanks for flagging! looked into this -- the inner join is actually intentional here. this method only returns records that have the associated data. records without it have nothing to display or match against.

Simple acknowledgment:

done!

With commit reference:

fixed in abc1234. added the null check as suggested.

Multi-point fix:

addressed both points:

1. added guard for self-reference prevention
2. wrapped empty state in droppable for drop zone coverage fixed in abc1234.

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Completion Checklist

• All unresolved comments analyzed
• Code fixes implemented for valid feedback
• Build passes
• Tests pass
• Changes committed
• Changes pushed to remote
• Reply posted to every addressed comment
• Every addressed thread resolved via GraphQL
• No unresolved threads remaining (unless intentionally deferred)

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Troubleshooting

"Not Found" (404) Errors

• Fetching single comment: Use /pulls/comments/{id} NOT /pulls/{pr}/comments/{id} -- the PR number is NOT in the path for single-comment lookups
• Replying to comment: Use /pulls/{pr}/comments/{id}/replies -- the PR number IS in the path for replies
• Ensure using -X POST for replies
• Verify comment ID exists

Authentication Issues

gh auth login
gh auth status

Rate Limiting

• GitHub API has rate limits
• Space out requests if posting many replies
• Check rate limit: gh api rate_limit

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Integration

Called by:

• Ad-hoc when review comments arrive
• After pr-create when reviewers provide feedback

Related skills:

• pr-create -- creates the PR that this skill responds to
• review -- the automated review swarm (catches issues before humans do)
• postmortem -- analyzes PR feedback patterns for skill improvement