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codex-research

codex-research is a skill for Claude Code, Codex from signalcompose/claude-tools. It costs 37 tokens per session (600 once invoked), scanned A, original, MIT.

A skill that uses the OpenAI Codex command-line tool to research technical topics, look up documentation, explain concepts, and review code.

In plain words
What is it for?
Use it for technical questions, documentation lookup, concept explanations, and reviews of files, directories, or uncommitted changes. Codex CLI and authentication must be set up first.
Why use it?
It gives you a separate command-line review or research step when you need documentation, best-practice guidance, or another analysis of code.

Skill for Claude CodeCodex

Installs and runs on its own, but its text points at files inside its plugin — anything it tells you to read at a ${CLAUDE_PLUGIN_ROOT} path is only there once the plugin is installed. Installing the plugin gets both.

Part of the ask-codex plugin — 1 skill, 2 commands shipped together

not rated 4 8d ago A scan 37 tokens original MIT
View the source file signalcompose/claude-tools
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/signalcompose/claude-tools/codex-research
Any agent
npx skills add signalcompose/claude-tools --skill codex-research
Clone the repo
git clone --depth 1 https://github.com/signalcompose/claude-tools

Made for: Claude Code, Codex.

Or install ask-codex, the plugin that ships this one along with the rest of its 1 skill, 2 commands.

Wrote 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.

agentmods badge for codex-research

README.md
[![agentmods](https://agentmods.dev/badge/skills/signalcompose/claude-tools/codex-research.svg)](https://agentmods.dev/skills/signalcompose/claude-tools/codex-research)
Your own site
<a href="https://agentmods.dev/skills/signalcompose/claude-tools/codex-research"><img src="https://agentmods.dev/badge/skills/signalcompose/claude-tools/codex-research.svg" alt="Measured on agentmods" height="20"></a>
Per session 37 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 600 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 $0.00037 $0.00600
Opus 5 $0.00018 $0.00300
Sonnet 5 $0.00007 $0.00120
Haiku 4.5 $0.00004 $0.00060

Measured 4d ago against content hash a5f43a7f72a8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

codex-research 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 4d 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.

plugins/ask-codex/skills/codex-research/SKILL.md · 87 lines

How it starts

The opening of the file, as written. The whole thing — 87 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Codex Research Skill

This skill provides integration with OpenAI Codex CLI for research and code review tasks.

Prerequisites

  • Codex CLI installed: npm install -g @openai/codex
  • Authentication (one of):
    • Run codex to complete OAuth authentication, OR
    • Set OPENAI_API_KEY environment variable

Available Scripts

All scripts are located in ${CLAUDE_PLUGIN_ROOT}/scripts/.

1. Check Installation

${CLAUDE_PLUGIN_ROOT}/scripts/check-codex.sh

Verifies Codex CLI is installed and authentication is configured (OAuth or API key).

2. Research Mode (codex exec)

${CLAUDE_PLUGIN_ROOT}/scripts/codex-exec.sh "your research question"

Use for:

  • Technical research questions
  • Documentation lookup
  • Concept explanations
  • Best practices inquiry

Example:

${CLAUDE_PLUGIN_ROOT}/scripts/codex-exec.sh "What is dependency injection and when should I use it?"

3. Code Review Mode

${CLAUDE_PLUGIN_ROOT}/scripts/codex-review.sh <target>

Options:

  • --staged - Review all uncommitted changes (staged + unstaged)
  • <file> - Review specific file (uses codex review <file>)
  • <directory> - Review directory (uses codex review <dir>)

Important: --staged uses codex exec review uncommitted which reviews all uncommitted changes, not just staged files. To review only specific files, use the file/directory target.

Examples:

${CLAUDE_PLUGIN_ROOT}/scripts/codex-review.sh --staged
${CLAUDE_PLUGIN_ROOT}/scripts/codex-review.sh src/main.ts
${CLAUDE_PLUGIN_ROOT}/scripts/codex-review.sh ./lib

Workflow

  1. First, verify Codex CLI is available using check-codex.sh
  2. For research tasks, use codex-exec.sh with the research prompt
  3. For code review, use codex-review.sh with the target

Error Handling

  • Timeout: Commands timeout after 120 seconds
  • Not installed: Provides installation instructions
  • Not authenticated: Prompts to complete OAuth or set OPENAI_API_KEY

Notes

Read the full file on GitHub · 87 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. 4d ago First seen · 87 lines · 37 tokens per session scan A a5f43a7f72a8

Subscribe to this mod's changes

codex-research is a skill published in the GitHub repository signalcompose/claude-tools (4 stars, last pushed 8d ago), licensed MIT. It adds 37 tokens to every session and 600 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.

Research
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