phx-pr-review

name	phx:pr-review
description	Address PR review threads on Elixir/Phoenix code — fetch unresolved threads, fix code, reply, and resolve each thread. Use when the user shares a PR URL or mentions reviewer feedback.
effort	high
argument-hint	<PR number or URL> [--fix] [--bots-only] [--no-resolve]

PR Review Response

Close the review loop: fetch unresolved threads → fix → reply → resolve. GitHub's isResolved is the state — re-runs are idempotent, handled threads drop out automatically.

Usage

/phx:pr-review 42                  # Triage unresolved threads on PR #42
/phx:pr-review 42 --fix            # Triage + apply approved code fixes
/phx:pr-review https://...         # Full URL also works (repo parsed from URL)
/phx:pr-review 42 --bots-only      # Triage only CI bot threads (Copilot, Codex...)
/phx:pr-review 42 --no-resolve     # Reply but leave threads open

Step 1: Resolve PR + Fetch Threads

gh pr view "$PR" --json number,title,state,baseRefName,headRefName,url,author (accepts number or URL; URL also yields owner/repo). Then fetch ALL review threads with thread IDs + resolved status — REST alone cannot do this:

cat > /tmp/review_threads.graphql <<'GQL'
query($owner:String!, $repo:String!, $pr:Int!, $cursor:String) {
  repository(owner:$owner, name:$repo) {
    pullRequest(number:$pr) {
      reviewThreads(first:50, after:$cursor) {
        pageInfo { hasNextPage endCursor }
        nodes {
          id isResolved isOutdated path line originalLine
          comments(first:20) { nodes {
            databaseId body createdAt
            author { login __typename } } }
        }
      }
    }
  }
}
GQL
gh api graphql --paginate -F owner="$OWNER" -F repo="$REPO" -F pr="$PR" \
  -F query=@/tmp/review_threads.graphql \
  --jq '.data.repository.pullRequest.reviewThreads.nodes[]
        | select(.isResolved == false)
        | {threadId: .id, isOutdated, path, line: (.line // .originalLine),
           firstCommentId: .comments.nodes[0].databaseId,
           author: .comments.nodes[0].author.login,
           isBot: (.comments.nodes[0].author.__typename == "Bot"),
           body: .comments.nodes[0].body}'

Also fetch review summaries (gh api "repos/$OWNER/$REPO/pulls/$PR/reviews") — they are NOT threads and cannot be resolved; surface CHANGES_REQUESTED bodies separately. Bot detection: __typename == "Bot" / user.type == "Bot" (the [bot] login suffix is NOT reliable across endpoints).

Step 2: Triage Table

Group by file, one row per thread. With --bots-only, keep only isBot rows.

#	file:line	author	category	proposed action

Categories: code-change ("should be", "use X instead") · question ("why", "how does") · nitpick ("nit:", style) · praise (no action) · discussion (architecture) · bot-finding (CI bot inline comment — verify before accepting, many are false positives) · outdated (isOutdated: true — line moved; default: reply "addressed in {commit}" + resolve). Present the table and let the user greenlight threads.

Step 3: Per-Thread Loop

For each greenlit thread:

1. Read code at path:line; check the suggestion against Iron Laws

2. Apply fix with a user-visible diff (only with --fix or explicit ok)

3. Draft reply (templates: ${CLAUDE_SKILL_DIR}/references/response-patterns.md)

4. STOP — show diff + reply, get confirmation

5. Post reply — REST, targeting the thread's root comment:

   gh api --method POST \
     "repos/$OWNER/$REPO/pulls/$PR/comments/$FIRST_COMMENT_ID/replies" \
     -f body="$REPLY_TEXT"
   

6. Resolve the thread (skip with --no-resolve):

   gh api graphql -f query='mutation($threadId:ID!){
     resolveReviewThread(input:{threadId:$threadId}){
       thread { id isResolved } }}' -F threadId="$THREAD_ID"
   

Mistake recovery: unresolveReviewThread takes the same input shape.

Step 4: Verify

mix compile --warnings-as-errors && mix test scoped to changed files. Do NOT commit or push — leave that to the user.

Step 5: Final Summary

Print rollup: # | thread | action | status (replied/resolved/skipped). List changed files. Optionally post a top-level conversation comment (gh api --method POST "repos/$OWNER/$REPO/issues/$PR/comments" -f body=...) with the rollup — only on user approval.

Iron Laws

1. NEVER auto-post responses — Always show drafts and get explicit approval
2. NEVER dismiss a review — Only the reviewer should dismiss
3. Iron Laws override reviewer suggestions — If a suggestion violates an Iron Law, explain why in the reply
4. Keep responses constructive — Acknowledge the feedback, explain reasoning
5. Separate fixes from responses — Apply code changes in a distinct step
6. NEVER resolve a thread without first posting a reply — every resolve is preceded by a reply on that thread explaining what was done
7. NEVER claim a fix without a shown diff — no "should be fixed" replies without a user-visible change
8. Bot findings get the same scrutiny as humans — decline Iron-Law-violating bot suggestions with explanation; never bulk-resolve "bot noise" without replies

Integration

PR receives review → /phx:pr-review {number}  ← YOU ARE HERE
   ↓ fetch unresolved threads (GraphQL, paginated)
   ↓ triage table → user greenlights
   ↓ per thread: fix (diff) → reply → resolve
   ↓ verify (mix compile + test) → summary
Push changes → user handles git push

Next Steps

• /phx:plan — if findings reveal scope gaps
• /phx:verify — full verification before pushing
• Re-run /phx:pr-review after the next review round (idempotent)

References

• ${CLAUDE_SKILL_DIR}/references/response-patterns.md — Response templates and tone
• ${CLAUDE_SKILL_DIR}/references/gh-commands.md — Full gh command reference (3 comment surfaces, pagination, bot detection)
• ${CLAUDE_SKILL_DIR}/references/bot-triage.md — Batch-triaging CI bot review passes