codex

Delegate code analysis, refactoring, and automated changes to Codex CLI.

4|2|Updated Jan 16, 2026

Search Tags:#automation #refactoring #cli #codex #code-analysis #file-references

Ready to run

npx skills add https://github.com/PeterFile/my-common-skills --skill codex-peterfile

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: codex
Source: https://github.com/PeterFile/my-common-skills/tree/main/codex
Command: npx skills add https://github.com/PeterFile/my-common-skills --skill codex-peterfile

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill delegates complex code tasks to Codex CLI for analysis, refactoring, and automated changes.

Core Features & Use Cases

Supports file references via @ syntax for precise edits and traceability.
Enables multi-model Codex sessions and sandbox controls to ensure safe, reproducible results across codebases.
Automates code changes across large codebases with structured output and review-friendly diffs.

Quick Start

Provide a task describing the code change, e.g., "refactor @src/utils.js for performance" and Codex will perform analysis, edits, and tests.

Frequently Asked Questions about codex

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I delegate complex code refactoring tasks to an AI agent for automated changes?▼

Automated code refactoring is handled by delegating tasks to Codex CLI, which performs analysis, edits, and tests across codebases. You provide a task description and the tool returns structured JSON with an agent message and session ID.

Can I reference specific files when automating code analysis and edits?▼

File references are supported using the @ syntax, allowing you to target specific files like @src/utils.js for precise edits and traceability during automated code analysis and refactoring.

How do I ensure safe and reproducible results when automating code changes across large codebases?▼

Safe and reproducible code changes are ensured through sandbox controls and multi-model sessions in Codex CLI, which generates review-friendly diffs and structured output for safe execution.

What is the process for executing Codex CLI tasks within my development environment?▼

Codex CLI must be invoked in the foreground via the Bash tool with a fixed 2-hour timeout, executing the code task and returning structured JSON output including an agent message and a session ID.

How do I start automating code changes with structured output and review-friendly diffs?▼

To start automating code changes, provide a task description such as "refactor @src/utils.js for performance" and the tool will perform analysis, edits, and tests, returning structured output with review-friendly diffs.

Are there limitations on the timeout duration when running code analysis tasks via the CLI?▼

The timeout duration for running code analysis tasks via Codex CLI is fixed at 2 hours, meaning long-running or highly complex codebase operations may need to be broken down into smaller tasks.