agpair-codex

A set of instructions for using external command-line coding agents alongside Codex. It defines when to delegate coding work, reviews, tests, or repository scans and how Codex should verify the results.

In plain words
What is it for?
Use it for multi-file changes, refactoring, test fixes, code reviews, repository scans, and smoke checks.
Why use it?
It helps divide non-trivial work into focused tasks and obtain alternative implementations or independent checks.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/logicrw/agpair/codex
Any agent
npx skills add logicrw/agpair --skill codex
Clone the repo
git clone --depth 1 https://github.com/logicrw/agpair

Made for: Claude Code, Codex.

Per session 49 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,912 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00049 $0.03912
Opus 5 $0.00024 $0.01956
Sonnet 5 $0.00010 $0.00782
Haiku 4.5 $0.00005 $0.00391

Measured 2d ago against content hash 256d05b76749, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

agpair-codex 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 2d 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.

skills/Codex/SKILL.md · 322 lines

How it starts

The opening of the file, as written. The whole thing — 322 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGPair for Codex

IRON LAW: Non-trivial work requires an explicit routing budget. Use external AGPair lanes by default, but fan out only when each lane has a distinct role, scope, hypothesis, or verification value. Multiple grok-cli lanes are valid when they are not duplicate prompts.

Default: external AGPair executor first for non-trivial work. Codex remains the controller and verifier.

Actively outsource low-value, repetitive, time-consuming, or easily verifiable work through AGPair: repo scans, alternative reviews, focused test-fix attempts, multi-file mechanical edits, smoke checks, and implementation slices with clear acceptance criteria. For ordinary non-trivial work, start with a strong external lane: grok-cli and antigravity-cli are peer first choices. Use both when independent evidence, implementation contrast, or latency hedging is useful. It is acceptable to run several attempts from the same executor at once for parallel review, competing implementation approaches, or file-sliced work, but each attempt needs a distinct task id, role, prompt, or scope.

Use direct Codex edits for tiny local fixes, sensitive judgment-heavy work, or when AGPair is unavailable. If skipping external AGPair entirely for non-trivial work, state the skip reason before proceeding. Use Codex native subagents as narrow controller-side reviewers/helpers when they add clear value, and as fallback when external executors are unavailable, unsuitable, or not good enough.

Normal Task

For ordinary tasks, send a clear natural brief. AGPair normalizes useful briefs and should not reject work merely because a section heading is missing. Do not pass placeholders like <brief>, todo, or fix this.

External lanes do not share Codex's hidden conversation state. The brief must stand alone: include the goal, relevant paths, constraints, forbidden scope, expected output, and validation or evidence requirements. If the worker would need unstated chat context to succeed, either add that context to the brief or keep the work in Codex/native helper lanes.

Read the full file on GitHub · 322 lines

Changes

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.

  1. 2d ago First seen · 322 lines · 49 tokens per session scan A 256d05b76749

Subscribe to this mod's changes

agpair-codex is a skill published in the GitHub repository logicrw/agpair (48 stars, last pushed 2mo ago), licensed MIT. It adds 49 tokens to every session and 3,912 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 2026-08-30.

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