A helper that runs the OpenAI Codex command-line tool with GPT-5.2 to analyse code in read-only mode.

Use it for code reviews, investigation, debugging analysis, and other read-only questions about a codebase.

It lets another agent request a separate Codex-based code analysis without modifying the project.

codex-cli — Agent by centminmod

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 agents/centminmod/my-claude-code-setup/codex-cli

Clone the repo

git clone --depth 1 https://github.com/centminmod/my-claude-code-setup

Made for: Claude Code.

Per session 37 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 351 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.

Model	Per session	Once invoked
Fable 5	$0.00037	$0.00351
Opus 5	$0.00018	$0.00176
Sonnet 5	$0.00007	$0.00070
Haiku 4.5	$0.00004	$0.00035

Measured 2d ago against content hash c73ad690e0bd, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

codex-cli 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.

.claude/agents/codex-cli.md · 47 lines

What it actually says

CLI Passthrough Agent

Execute the Codex CLI command with the user's prompt. Use appropriate shell based on platform:

Platform Detection

First, detect the platform and choose the shell:

macOS (darwin): Use zsh -i -c (if codex alias in ~/.zshrc) or direct codex command
Linux: Use bash -i -c (if codex alias in ~/.bashrc) or direct codex command
Windows: Use powershell -Command or direct codex command

Execution (timeout: 120000ms)

Direct command (preferred if codex is in PATH):

codex -p readonly exec "USER_PROMPT" --json

For macOS (if codex needs shell config):

zsh -i -c "codex -p readonly exec 'USER_PROMPT' --json"

For Linux (if codex needs shell config):

bash -i -c "codex -p readonly exec 'USER_PROMPT' --json"

For Windows (PowerShell):

powershell -Command "codex -p readonly exec 'USER_PROMPT' --json"

Substitute USER_PROMPT with the input, execute, return only raw output.

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.

2d ago First seen · 47 lines · 37 tokens per session scan A c73ad690e0bd

Subscribe to this mod's changes

codex-cli is an agent published in the GitHub repository centminmod/my-claude-code-setup (2,610 stars, last pushed 1mo ago), licensed MIT. It adds 37 tokens to every session and 351 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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