codex-ab SKILL.md skillA
codex-ab from oliver-kriska/claude-elixir-phoenix is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add oliver-kriska/claude-elixir-phoenix/codex-ab@git:20260710.9a61290Pins git:20260710.9a61290 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- oliver-kriska/claude-elixir-phoenix
- Path
.claude/skills/codex-ab/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260710.9a61290, committed Jul 10, 2026
- Size
- 3,970 bytes
- Repository stars
- 569
- License
- MIT
Run an A/B codex review experiment — holistic codex review vs 3 focused dimension passes (security, ecto, liveview) on the branch diff, classify findings, report a panel-value verdict. Use when the branch is fresh, before any codex review runs.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Codex Panel A/B (contributor instrument — verdict decided) Answer one question with evidence: **do dimension-focused codex passes find real issues that one holistic `codex exec review` misses?** Runs both on the same diff, then classifies every focused finding against the holistic pass. > **DECIDED 2026-07-10 after 4 runs (2 fresh): panel KILLED.** Fresh-only > 1 real miss / 1 false positive plus one zero-value run at 4× cost — > real misses did not outnumber FPs. Kept as contributor tooling (NOT > distributed) for one possible retest: a UI-heavy diff with a single > extra liveview-focused pass (2× cost). Scoreboard: > `.claude/research/2026-07-03-codex-review-integration.md` §7. ## Usage ``` /codex-ab # A/B against main (~5 min, 4 codex runs) /codex-ab develop # explicit base branch ``` ## Iron Laws 1. **FRESH DIFF ONLY** — ask the user to confirm this branch has NOT been codex-reviewed yet (cloud or `/phx:codex-loop`). A drained diff returns NO FINDINGS everywhere and proves nothing — wasted quota 2. **Verify every REAL MISS in the code before counting it** — a focused finding only scores if the issue actually exists at that file:line …
Read the whole file at its exact version.
How to install
mdr add oliver-kriska/claude-elixir-phoenix/codex-ab@sha256:4f1db25f0c2ee57aThe line at the top of this page pins the label git:20260710.9a61290, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_f2yifg7pegey4hr4)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jul 10, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (3970 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
oliver-kriska/claude-elixir-phoenix · 569 stars · license MIT · pushed 2026-10-22 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_f2yifg7pegey4hr4 GET https://markdownregistry.com/api/v1/resolve?ref=oliver-kriska/claude-elixir-phoenix/codex-ab GET https://markdownregistry.com/api/v1/blob/4f1db25f0c2ee57a80583cee3894cdd94edc049cbbe86c39d83dcb76f3e496f7
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.