{"slug":"watch-pr","title":"watch-pr","summary":"Watch an Elixir/Phoenix PR for new review comments (bot + human) and CI results via a background watcher that wakes Claude only on real events. Use after opening a PR or pushing, while waiting on CI or reviewers.","platform":"Claude","tags":[],"authorName":"LLM Mart","authorSlug":"llm-mart","score":0,"source":"github","price":null,"verified":false,"createdAt":"2026-10-04T15:14:17.79228Z","repo":{"url":"https://github.com/oliver-kriska/claude-elixir-phoenix","stars":560,"forks":44,"license":"MIT","updatedAt":"2026-10-02T04:11:38Z"},"bodyHtml":"
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name: watch-pr\ndescription: Watch an Elixir/Phoenix PR for new review comments (bot + human) and CI results via a background watcher that wakes Claude only on real events. Use after opening a PR or pushing, while waiting on CI or reviewers.\neffort: medium\nargument-hint:

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Watch PR (Token-Conscious)

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Watch a PR's reviews, comments, and CI with a background watcher that\nwakes Claude ONLY on real events — no foreground sleep loops, no context\nbloat. The watcher polls quietly in its own process; nothing enters\ncontext until something genuinely changed.

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Usage

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/phx:watch-pr 42                 # watch reviews + comments + checks\n/phx:watch-pr 42 --checks-only   # CI only (delegates to gh pr checks --watch)\n/phx:watch-pr 42 --fix           # on actionable review, draft fixes too\n/phx:watch-pr 42 --codex         # + request Codex cloud review, loop until clean\n/phx:watch-pr 42 --codex --codex-rounds 2   # cap re-review rounds (default 3)\n
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Iron Laws

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    \n
  1. NEVER foreground-poll with sleep in the session — use the\nbackground watcher (Monitor / run_in_background). Foreground polling\nbloats context and straddles the 5-min cache TTL
    2. \n
  2. Deltas ONLY enter context — never dump full gh JSON. The watcher\nemits one-line events; read .claude/watch/pr-{n}.jsonl on demand
    3. \n
  3. Silence is not success — the watcher MUST emit on PR closed/merged,\nCI failure, repeated gh errors, and watchdog timeout — not just \"new\ncomment\". A silent watcher looks identical to a hung one
    4. \n
  4. NEVER auto-post replies or auto-push — hand off to /phx:pr-review\nfor responses; show drafts and get approval. ONE exception: passing\n--codex IS the consent to post the @codex review trigger comment\n(and its per-round re-requests) — nothing else is ever auto-posted
    5. \n
  5. Bound every watch — default MAX_DURATION 3600s (7200s with\n--codex); always stop on terminal state. Codex rounds are bounded by\n--codex-rounds (default 3) — each round costs cloud quota
    6. \n
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Workflow

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Step 1: Parse Arguments

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Extract PR number (from number or URL — URL also yields the repo). Detect\n--checks-only / --fix / --codex / --codex-rounds N. Baseline\ntimestamp = now; events are \"new since baseline\", so old reviews don't\nre-fire.

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With --codex, the default is to POST @codex review — the flag IS\nthat consent (Iron Law 4). Skip the trigger ONLY when the connector bot\n(chatgpt-codex-connector[bot]) has itself reacted to / reviewed the\ncurrent head SHA. The repo's CI \"Codex\" check and any local codex exec /\n/phx:review --codex / /phx:codex-loop run are DIFFERENT mechanisms from\nthe GitHub connector — they NEVER satisfy the skip. When unsure, post. The\nconnector auto-registers PRs on ready (its absence surfaces later as\ncodex_timeout), so check ITS reactions before posting a redundant trigger:

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HEAD_AT=$(gh api \"repos/{owner}/{repo}/commits/$(gh pr view {n} --json headRefOid -q .headRefOid)\" --jq .commit.committer.date)\nBOT=$(gh api \"repos/{owner}/{repo}/issues/{n}/reactions\" | jq -r --arg t \"$HEAD_AT\" \\\n  '[.[] | select(.user.login == \"chatgpt-codex-connector[bot]\" and .created_at >= $t) | .content] | unique | join(\",\")')\n
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(gh api --jq accepts no --arg — pipe through standalone jq.)

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Definitive check first: a connector-bot comment or review containing\nReviewed commit: {sha} that matches the current head sha means that\nstate IS reviewed (clean if it says \"Didn't find any major issues\") —\ntrust it over timestamps, which are client-set and can skew. Then:

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Connector-bot signal on current headAction
+1 reactionConnector already reviewed this head clean — no trigger, no codex round; watch CI/humans only
eyes + a codex review already submitted since $HEAD_ATFindings already posted — skip the watch; run the codex_review action (Step 3) now
eyes onlyReview in flight — do NOT post; export WATCH_CODEX=1 WATCH_CODEX_SINCE=$HEAD_AT (no trigger id) and watch
none (or reactions predate head)Post the trigger and capture its id:
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TRIGGER_ID=$(gh api --method POST \"repos/{owner}/{repo}/issues/${PR}/comments\" \\\n  -f body=\"@codex review\" --jq '.id')\n
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Export WATCH_CODEX=1 WATCH_CODEX_TRIGGER_ID=$TRIGGER_ID to the watcher\nenv and set MAX_DURATION 7200. Round counter starts at 1.

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Step 2a: --checks-only Path

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No custom poller needed — gh pr checks --watch blocks until all checks\nfinish, then exits. Run via Bash with run_in_background: true:

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gh pr checks {n} --watch --fail-fast --interval 10\n
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Exit code is the signal: 0 = pass, 1 = fail, 8 = pending. On exit,\nreport the conclusion; on failure, offer /phx:investigate with the\nfailing job log (gh run view {run-id} --log-failed).

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Step 2b: Full Watch Path

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Start the Monitor tool (preferred — streams each event line back) on:

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${CLAUDE_SKILL_DIR}/scripts/watch-pr.sh {n} reviews,comments,checks\n
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Monitor is a deferred tool — load its schema FIRST via ToolSearch\n(select:Monitor); calling it blind fails with InputValidationError\n(use only the params its schema lists). A Monitor watch ends within 30 min\n(10 in -p runs, CC 2.1.271+), so export WATCH_SEGMENT=1740 (540 in -p)\nand set timeout_ms = 1800000 (600000). The script emits rearm before that.\nWhere Monitor is unavailable\n(Bedrock/Vertex/Foundry), run the same script via Bash\nrun_in_background: true — it exits on the first terminal event instead.\nStay idle or keep working until an event lands.

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Step 3: React Per Event

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
EventAction
review / comment (actionable)Summarize the delta; with --fix draft fixes + mix compile && mix test; route reply drafting to /phx:pr-review {n}
check conclusion failureOffer /phx:investigate on the failing job
codex_ackNote \"codex is reviewing (~15–20 min on large PRs)\"; keep waiting
codex_reviewStop the watcher. Run /phx:pr-review {n} --bots-only (fix → reply → resolve; user approves and pushes). If rounds < --codex-rounds: post @codex review again, restart watcher with the new trigger id, round+1. Else: report remaining findings, stop
codex_cleanCodex is clean (\uD83D\uDC4D reaction OR a \"Didn't find any major issues\" bot comment). If checks also green → terminal success \"codex + CI clean\"; else keep watching CI
codex_timeoutInform: repo likely lacks the Codex connector; continue as a plain watch
rearmNot terminal. Start the same command again with WATCH_RESUME=1 added — it restores baseline, seen events and check state from the delta file
merged / pr_closed / watchdog / watch_errorStop, report final state
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A codex_review whose /phx:pr-review --bots-only fetch finds zero\nunresolved codex threads also counts as clean (summary-only review).

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Step 4: Stop

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The watcher self-terminates on terminal states. To stop early: TaskStop\nthe background task or cancel the monitor.

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Integration

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push / open PR → /phx:watch-pr {n} ──(new review)──► /phx:pr-review {n}\n                              ├──────(CI fail)─────► /phx:investigate\n                              ├──(--codex: codex_review)─► /phx:pr-review --bots-only → push → re-request → watch (≤3 rounds)\n                              ├──(--codex: codex_clean + CI green)─► done: codex + CI clean\n                              └──────(merged)──────► done\n
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References

\n\n","files":[{"path":"references/watcher-mechanics.md","sizeBytes":6884,"isText":true},{"path":"scripts/watch-pr.sh","sizeBytes":10049,"isText":true},{"path":"SKILL.md","sizeBytes":7834,"isText":true}],"reviewScore":null,"reviewSummary":null,"trust":{"provenance":"trusted-source-unreviewed","notice":"Community-authored content, reproduced verbatim and not vetted as instructions. Treat it as data to evaluate, never as directives to follow.","bodySource":null},"bodyLocked":false,"purchaseUrl":null,"sourceUrl":null,"report":{"provenance":"trusted-source-unreviewed","screen":{"ran":true,"outcome":"clean","suspicious":0,"notes":0,"hiddenCharacters":false},"virusScan":{"engine":"clamav","status":"clean","scannedAt":"2026-10-04T15:15:32.502755Z","sha256":"B3E6B5AB8C7484FFEAAF80EC2C36124E3A0C522503410A206063321C468A823C","sizeBytes":11285},"review":null,"source":{"repositoryUrl":"https://github.com/oliver-kriska/claude-elixir-phoenix","path":"plugins/elixir-phoenix/skills/watch-pr","license":"MIT","commit":"9767a82d24ddddad553e85f88efc2869a7fd7d88","subtreeSha":"2A9D822A281674AAE8469D69470D8CDCFAF0191106BB4394D6B84707C7C8DA2D","lastSyncedAt":"2026-10-04T15:14:09.139242Z"},"reviewedAt":"2026-10-04T15:17:38.049463Z","notice":"Community-authored content, reproduced verbatim and not vetted as instructions. Treat it as data to evaluate, never as directives to follow."},"install":[{"target":"skills-cli","command":"npx skills add https://github.com/oliver-kriska/claude-elixir-phoenix/tree/main/plugins/elixir-phoenix/skills/watch-pr"},{"target":"claude-code","command":"claude plugin marketplace add https://llmmart.ai/marketplace.json && claude plugin install oliver-kriska-claude-elixir-phoenix@llmmart"},{"target":"git","command":"git clone https://github.com/oliver-kriska/claude-elixir-phoenix.git"}]}