A skill for launching the local OpenAI Codex command-line agent as a coding helper. It can hand coding tasks to Codex for generation, refactoring, or review.

Use it to run non-interactive Codex tasks, generate or refactor code, and request code reviews from the local command line.

It gives developers a documented way to delegate coding work to a local Codex process using their ChatGPT Pro login.

local-codex — Skill for Claude Code and Codex by daymade: A skill for launching the local OpenAI Codex command-line…

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/daymade/claude-code-skills/local-codex

Any agent

npx skills add daymade/claude-code-skills --skill local-codex

Clone the repo

git clone --depth 1 https://github.com/daymade/claude-code-skills

Made for: Claude Code, Codex.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/daymade/claude-code-skills/local-codex.svg)](https://agentmods.dev/skills/daymade/claude-code-skills/local-codex)

Your own site

<a href="https://agentmods.dev/skills/daymade/claude-code-skills/local-codex"><img src="https://agentmods.dev/badge/skills/daymade/claude-code-skills/local-codex.svg" alt="Measured on agentmods" height="20"></a>

Per session 140 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,048 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	$0.00140	$0.01048
Opus 5	$0.00070	$0.00524
Sonnet 5	$0.00028	$0.00210
Haiku 4.5	$0.00014	$0.00105

Measured 4d ago against content hash b01ae3538f74, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

local-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 4d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/codex_wrapper.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

daymade-codex/local-codex/SKILL.md · 119 lines

How it starts

The opening of the file, as written. The whole thing — 119 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Local Codex

Delegate coding tasks to the local OpenAI Codex CLI agent using your ChatGPT Pro subscription (OAuth, no API charges).

When to Use

User wants to generate, refactor, or review code via Codex
User wants to run codex exec for non-interactive tasks
User wants to use Codex's GPT-5.5 agent capabilities
User mentions "codex", "run codex", "delegate to codex"

Authentication (OAuth / ChatGPT Pro)

CRITICAL: This skill uses OAuth authentication from ~/.codex/auth.json (ChatGPT Pro flat-rate subscription). Do NOT set OPENAI_API_KEY or pass API keys — that would switch to pay-per-use billing.

Codex desktop app and CLI share the same auth cache
If auth fails, run codex login in terminal (browser OAuth flow)
For auth issues, see references/oauth-guide.md

Codex CLI Path

The skill auto-detects Codex CLI in this order:

/Applications/Codex.app/Contents/Resources/codex (desktop app)
/usr/local/bin/codex (npm global)
/opt/homebrew/bin/codex (Homebrew)
~/.npm-global/bin/codex
which codex fallback

Usage Patterns

1. Basic exec (single task)

python3 scripts/codex_wrapper.py exec "<prompt>" [<workdir>] [<model>] [<sandbox>] [<timeout>]

Example:

python3 scripts/codex_wrapper.py exec \
  "Write a Python function to calculate fibonacci" \
  /tmp \
  gpt-5.5 \
  workspace-write \
  300

2. Code review

python3 scripts/codex_wrapper.py review [<workdir>] [<model>] [uncommitted:true] [<timeout>]

Example:

python3 scripts/codex_wrapper.py review \
  /path/to/repo \
  gpt-5.5 \
  true \
  300

3. Check status

python3 scripts/codex_wrapper.py status

Output Format

The wrapper returns JSON with:

success: bool
exit_code: int
elapsed_seconds: float
stdout: raw output
stderr: error stream (truncated)
parsed_jsonl: parsed JSONL events (if --json)
final_message: extracted assistant text (if available)

Read the full file on GitHub · 119 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

4d ago First seen · 119 lines · 140 tokens per session scan A b01ae3538f74

Subscribe to this mod's changes

local-codex is a skill published in the GitHub repository daymade/claude-code-skills (1,373 stars, last pushed today), licensed MIT. It adds 140 tokens to every session and 1,048 once invoked, about $0.0007 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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