Run Codex Review Loop

run-codex-review-loop

Run repeatable Codex review passes without relying on the retired run-codex-2 dispatcher. This skill owns the loop around native Codex review execution; run-review in the main pack owns one-off review routing, PR handoff, and feedback triage.

Two modes:

• Mode A — Multi-lens checkout audit (default): review the current active checkout branch (whatever git branch --show-current reports — often main) through many independent review lenses, in rounds, until findings converge.
• Mode B — Multi-branch comparison: the original branch loop — run review across two or more named branches and compare findings.

Pick Mode B only when the user names two or more branches. Everything else — "review the whole project", "full audit", "multiple lenses", "review main", "review the current branch" — is Mode A.

Use This When

• The user asks for a complete, multi-lens, whole-project Codex review of the current checkout branch.
• The user asks to keep reviewing until issues converge or the branch is clean enough.
• The user names two or more branches and asks for Codex review, convergence, close-out, or comparison.
• A prior review loop has saved outputs and the user asks to resume or rescue it.

Do not use this for:

• A single small PR, commit, or uncommitted diff. Use run-review Mode D.
• Opening a PR or writing a self-review body. Use run-review Mode B.
• Triaging human or bot comments already posted on a PR. Use run-review Mode C.
• Generic multi-agent implementation fan-out. This skill is review-only.

Preconditions

Run these before any mode:

codex --version
git rev-parse --is-inside-work-tree
git branch --show-current
git rev-parse --verify HEAD
git status --short

Require codex-cli 0.130.0 or newer.

• Mode A: a dirty tree is allowed because the target is the current checkout as-is. Record tree: clean|dirty in the manifest.
• Mode B: a dirty tree blocks. Stop and either ask for clean branch refs or use a one-off review flow instead.

For every branch named in Mode B:

git rev-parse --verify 

If a branch does not resolve locally, fetch it explicitly or report that it is missing. Do not silently drop it.

Mode A — Multi-lens checkout audit

Phase 0: Explore first

Do not start with Codex prompts. First understand the project enough to choose the right review lenses.

Spawn 1–3 Sonnet-class explore agents — Claude Sonnet or an equivalent mid-tier model. The point is fast, broad project mapping, not top-tier deep reasoning. Use equivalent local/default agents if Sonnet is unavailable. Give each agent a bounded mission such as:

• Map the repo: product purpose, areas, entry points, runtime boundaries, and highest-risk modules.
• Identify external systems, credential paths, write/mutation paths, data stores, and irreversible operations.
• Read AGENTS.md/CLAUDE.md plus architecture/safety docs and extract the invariants the code must uphold.
• Find where docs make concrete guarantees that could drift from implementation.

The explore outputs are steering inputs. They decide what Codex reviews to run. Do not use a generic checklist when the project tells you what matters. A fragile ERP integration needs concurrency/token/governor lenses; a public web API needs authz/rate-limit lenses; a data pipeline needs idempotency/freshness/data-loss lenses.

Highest priority targets are the project's own explicit invariants — especially AGENTS.md, CLAUDE.md, operational-safety docs, architecture docs, and schemas. A contradiction between a stated invariant and runtime code is usually a real finding.

Phase 1: Plan each round

From exploration, write a lens list for round 1.

Rules:

• Run minimum 3 and maximum 20 Codex reviews per round.
• Scale with repo size and risk. 5–8 lenses is typical for a mid-size repo; 12–20 is for large or safety-critical systems.
• Each lens must be genuinely distinct: different subsystem, different failure class, or different design question.
• Do not split one lens into many near-duplicates just to hit a count.
• If the user supplied focus text, preserve it and route it into the lens plan; do not broaden away from it.

Good lens shapes:

• Safety-critical subsystem plus all callers.
• Security and credential handling, including git history when relevant.
• API contract, schemas, samples, and data integrity.
• Error paths, partial failure, retries, idempotency, and data loss.
• Concurrency, locking, queues, cancellation, and shutdown behavior.
• Adversarial architecture challenge: assumptions, tradeoffs, scaling limits, single points of failure.
• Docs-vs-code drift for operational claims.
• Test coverage versus stated invariants.

Every lens prompt must demand:

• Read complete relevant files, not only search snippets.
• Trace at least one concrete path from entry point to risky behavior.
• Report only correctness, security, data-loss, API-contract, stability, or design-risk findings.
• Ignore style, formatting, naming, and vague best-practice advice.
• Give file:line evidence, concrete trigger scenario, severity, and why it matters.
• If clean after genuinely tracing, say clean explicitly.

Phase 2: Run the round

Create one run directory and one subdirectory per round:

mkdir -p "/tmp/codex-review-loop/$(date +%Y%m%dT%H%M%SZ)/round-1"

Record a manifest at the run root:

mode: multi-lens
branch: 
head: 
tree: clean|dirty
rounds-max: 10
round: 1
lenses:
- : 

Launch all lenses for the round in parallel, preferably in background tasks, one Codex run per lens. Use whichever execution surface is available:

1. Codex companion runtime if installed:

``bash node "/scripts/codex-companion.mjs" task "" ``

1. Native Codex:

``bash codex exec review --json -o "/tmp/codex-review-loop//round-N/.md" "" ``

After each run completes:

• Verify the output exists and is non-empty.
• Save or copy the result to /round-N/.md so the run is resumable.
• If a run fails, mark that lens blocked with the exact command and stderr summary. Do not silently drop it.

Phase 3: Synthesize the round

Read every lens output and produce a deduplicated table:

| # | Severity | Finding | Evidence | Lenses | Status | |---|---|---|---|---|---|

Rules:

• Deduplicate by file path plus behavior, not by wording.
• Mark findings seen by multiple independent lenses as corroborated.
• Carry status across rounds: new, still-open, fixed-verified, or regressed.
• If a lens found nothing, record clean for that lens.
• Do not treat a Codex report as verified truth. Before final synthesis, spot-check enough file:line evidence to reject obvious hallucinations or stale paths.

Phase 4: Loop until convergence

Run up to 10 rounds. Between rounds, fixes may be applied outside this skill by the main agent or user; this skill itself remains review-only.

For each next round:

• Re-read the current branch/HEAD and update the manifest.
• Keep lenses that found confirmed high-value issues, rewritten to verify whether those issues still exist.
• Drop lenses that came back clean twice unless new code makes them relevant again.
• Add new lenses if fixes, exploration, or prior findings reveal a new risk area.
• Do not exceed 20 lenses in any round.

Stop early when the loop converges. Convergence means one of:

• A round returns only small-detail/trivial findings: no critical/high issues and nothing that changes behavior, data integrity, security, API contract, or operational safety.
• Two consecutive rounds add no new substantive findings.
• All previously confirmed substantive findings are verified fixed or intentionally accepted by the user.

When stopping, state exactly which condition fired. Do not keep grinding after convergence; extra rounds at that point manufacture noise.

Mode B — Multi-branch comparison

1. Create a timestamped run directory and manifest:

```text mode: branch-comparison base: branches:

```

1. For each branch, switch to it, verify clean, and run:

``bash codex exec review \ --base \ --json \ -o "/tmp/codex-review-loop//-last.md" \ "Review only major correctness, security, data-loss, API-contract, and stability risks. Ignore style." ``

1. Preserve any user-provided focus text. Do not broaden it.
2. Verify each output file exists and is non-empty before moving to the next branch.
3. Synthesize:

| Branch | Verdict | Major findings | Evidence | Next action | |---|---|---|---|---|

Deduplicate shared findings across branches. Mark findings as branch-specific or shared. Mark clean branches as clean. Mark failures as blocked with exact command and stderr summary.

Resume / Rescue

Locate the latest run directory under /tmp/codex-review-loop/ or use the user-provided path. Read the manifest and list completed outputs.

• Mode A: continue missing lenses in the current round, then synthesize. Do not rerun completed lenses unless the user asks or HEAD changed.
• Mode B: continue missing branches only.
• If current scope differs from the manifest — branch, base, lens intent, or round target — create a new run directory. Never reuse a stale manifest.

Boundaries

• Do not edit code. This is a review loop, not a fix loop.
• Do not create PRs, push, post comments, deploy, or trigger external actions unless the user explicitly asks for that separate action.
• Do not invent a replacement dispatcher script. Codex companion or native codex exec is the execution surface.
• Do not reference retired skills or deleted paths.

Final Output

Return:

• Run directory.
• Mode and target branch/HEAD.
• Rounds executed and stop condition, for Mode A.
• Branch matrix, for Mode B.
• Deduplicated findings with severity, evidence, lenses, and status.
• Blocked lenses/branches, if any.
• Exact verification rung reached:

Verification rungs:

• Rung 1: target branch/refs verified; exploration complete for Mode A.
• Rung 2: every Codex run completed or is explicitly blocked.
• Rung 3: output files checked non-empty and saved into the run directory.
• Rung 4: findings synthesized, deduplicated, and status-tracked across rounds or branches.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: yigitkonur
• Source: yigitkonur/skills-by-yigitkonur
• License: MIT

Install and usage instructions live in the source repository linked above.