Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add Vimalk0703/shipworthy --skill codex-cross-reviewgit clone --depth 1 https://github.com/Vimalk0703/shipworthyWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/vimalk0703/shipworthy/codex-cross-review)<a href="https://agentmods.dev/skills/vimalk0703/shipworthy/codex-cross-review"><img src="https://agentmods.dev/badge/skills/vimalk0703/shipworthy/codex-cross-review/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/vimalk0703/shipworthy/codex-cross-review"><img src="https://agentmods.dev/badge/skills/vimalk0703/shipworthy/codex-cross-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00043 | $0.01621 |
| Opus 5 | $0.00022 | $0.00811 |
| Sonnet 5 | $0.00009 | $0.00324 |
| Haiku 4.5 | $0.00004 | $0.00162 |
Grade A, and why
codex-cross-review scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 191 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Codex Cross-Review
Optional capability. This skill requires the
codex-plugin-ccClaude Code plugin and the OpenAI Codex CLI. All other Shipworthy skills work independently — this adds dual-model review on top. Users without Codex installed lose nothing; they simply use Claude's built-incode-revieweragent viashipworthy:requesting-code-reviewinstead.
When activating, output:
⚓ shipworthy › skill:
codex-cross-review— dispatching Codex for cross-model review
Availability Check
Before invoking any /codex:* command, check whether the plugin is available. If /codex:setup is not recognized or reports Codex is not installed:
- Inform the user that this skill requires the
codex-plugin-ccplugin - Offer setup guidance (see Prerequisites below)
- Fall back to Claude's built-in
code-revieweragent — it covers the same checklist without Codex
This skill never blocks work. If Codex is unavailable, the review still happens via Claude's own agent.
Prerequisites
Requires two things — the Codex CLI and the Claude Code plugin:
# 1. Install and authenticate the Codex CLI (one-time)
npm install -g @openai/codex
codex login # browser OAuth (ChatGPT account, incl. Free tier)
# OR: codex login --with-api-key # OpenAI API key
# OR: codex login --device-auth # headless/SSH environments
# 2. Install the Claude Code plugin (one-time)
/plugin marketplace add openai/codex-plugin-cc
/plugin install codex@openai-codex
/reload-plugins
# 3. Verify
/codex:setup
No environment variables needed — the Codex CLI manages its own credentials.
When to Use
- After Claude completes a feature — Codex reviews for blind spots
- Before merging any PR — structured review with severity-rated findings
- High-volume PR review — batch review workflow across multiple PRs
- When the user wants a second opinion from a different model
- Before shipping to production — final cross-validation gate
Cross-Validation Workflow
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 191 lines · 43 tokens per session scan A 0419b105460c
codex-cross-review is a skill published in the GitHub repository Vimalk0703/shipworthy (7 stars, last pushed 5mo ago), licensed MIT. It adds 43 tokens to every session and 1,621 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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