{"slug":"codex-loop","title":"codex-loop","summary":"Fix Elixir/Phoenix code until Codex CLI review comes back clean — bounded review, fix, verify loop before opening a PR. Use when codex is installed and you want an external cross-model critic on your changes before pushing.","platform":"Claude","tags":[],"authorName":"LLM Mart","authorSlug":"llm-mart","score":0,"source":"github","price":null,"verified":false,"createdAt":"2026-10-04T15:14:10.47845Z","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: codex-loop\ndescription: Fix Elixir/Phoenix code until Codex CLI review comes back clean — bounded review, fix, verify loop before opening a PR. Use when codex is installed and you want an external cross-model critic on your changes before pushing.\neffort: medium\nargument-hint: \"[--base

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Codex Loop (fix until clean)

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Critic→Refiner loop with the Codex CLI as external critic: review → fix\napproved findings → verify → re-review, until codex is clean or rounds run\nout. Codex reviews; Claude fixes. Complements /phx:review (Claude panel)\n— run either or both before a PR.

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Usage

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/phx:codex-loop                    # diff vs default branch, interactive\n/phx:codex-loop --uncommitted      # staged + unstaged + untracked\n/phx:codex-loop --base develop     # explicit base branch\n/phx:codex-loop --auto             # auto-approve P0/P1/P2, skip P3\n/phx:codex-loop --max-rounds 2     # default 3\n
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Iron Laws

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    \n
  1. BOUNDED rounds — never exceed --max-rounds (default 3) — each round\ncosts codex quota; report remaining findings instead of looping on
    2. \n
  2. Verify BEFORE re-review — mix compile --warnings-as-errors + tests\nmust pass before burning a codex round on broken code
    3. \n
  3. NEVER commit or push — leave git to the user
    4. \n
  4. Codex findings get Iron Law scrutiny — decline suggestions that\nviolate an Iron Law, with explanation in the round report
    5. \n
  5. Skipped findings are reported, never dropped — every finding ends as\nfixed, declined (with reason), or deferred-by-user
    6. \n
  6. Missing CLI stops the skill with an install hint — suggest\n/phx:review as the codex-free alternative; never crash
    7. \n
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Workflow

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Step 1: Preflight

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Run command -v codex. If missing: STOP.\nShow the install hint (brew install codex or npm i -g @openai/codex,\nthen codex login; codex doctor to diagnose) and suggest /phx:review.

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Then two cheap checks that save review rounds:

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Step 2: Detect Diff Mode

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Step 3: Round Loop (max --max-rounds, default 3)

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    \n

  1. Review — ONE foreground Bash call, explicit timeout: 600000\n(large diffs run 10+ min). On timeout with the process alive: ONE\nuntil [ -f {out} ]; do sleep 5; done wait — never poll-spam or\npkill a running review (quota is spent either way). ALWAYS silence\nthe streams — only the -o file matters (10k+ lines otherwise):

    \n
    codex exec review --base {branch} --ephemeral \\\n  -o /tmp/codex-round-{n}.md > /tmp/codex-round-{n}.log 2>&1\n
    \n

    NEVER pass custom instructions with a diff-mode flag — the CLI rejects\nthe combination; the rubric comes from AGENTS.md ## Review guidelines\n(/phx:init). Parse the output file, NOT the exit code (0 even with\nfindings). Recipes: ${CLAUDE_SKILL_DIR}/references/codex-cli.md.

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    2. \n

  2. Clean check — parse the output file; no - [P{n}] bullets means\nCLEAN → go to Step 4.

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    3. \n

  3. Triage — emit the findings table\n(# | P | file:line | title | proposed action) as visible\nresponse text BEFORE any AskUserQuestion call — a table composed\nonly in thinking never renders. Then ask approve-or-skip per finding\n(AskUserQuestion). With --auto: approve P0/P1/P2, skip P3 (list\nskipped in the round report).

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    4. \n

  4. Fix — apply approved fixes with user-visible diffs. Check each\nagainst Iron Laws first (Law 4).

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    5. \n

  5. Verify — scoped, before the next round:

    \n
    mix format {changed_files} && \\\nmix compile --warnings-as-errors && mix test {affected_tests}\n
    \n

    If verification fails 3 times, STOP with a BLOCKER report — do not\nburn another codex round on broken code.

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    6. \n

  6. Next round (n+1).

    \n
    7. \n
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Step 4: Final Report

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## Codex Loop Report — {CLEAN | MAX ROUNDS REACHED | BLOCKED}\nRounds: {n}/{max} | Fixed: {n} | Declined (Iron Law): {n} | Deferred: {n}\n{per-round: findings → outcome}\n{remaining findings if not CLEAN}\n
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On CLEAN: suggest /phx:compound for non-obvious fixes, then commit/PR.\nOn MAX ROUNDS: list remaining findings; offer /phx:plan to convert them\ninto a follow-up plan.

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Integration

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implement → /phx:codex-loop (YOU ARE HERE) → clean → commit/PR → /phx:watch-pr --codex\n     ↑ or arrive from /phx:review --codex verdict REQUIRES CHANGES\n
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References

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