pluginintermediateChatGPT/Codex

Codex CLI: AI-Powered Local Terminal Agent

OpenAI's Codex CLI is a tool developers can install on their computers to use AI for coding tasks directly in their terminal. It allows them to automate programming workflows, like creating code, fixing bugs, and managing files, using simple text commands instead of manual effort.

AI SETUP PROMPT

Paste into Codex CLI — it will scan your project and set everything up

# Install & Configure: Codex CLI: AI-Powered Local Terminal Agent

## What This Is
OpenAI's Codex CLI is a tool developers can install on their computers to use AI for coding tasks directly in their terminal. It allows them to automate programming workflows, like creating code, fixing bugs, and managing files, using simple text commands instead of manual effort.

Source: https://yuv.ai/blog/openai-codex-cli-ai-powered-terminal-is-here

## Before You Start

Scan my workspace and analyze:
- The project language, framework, and directory structure
- Existing agent configuration (check for .claude/, .codex/, CLAUDE.md, settings.json, commands/, skills/ directories)

Then ask me before proceeding:
1. Do I need to configure any service credentials for this plugin (database, API keys, etc.)?
2. Should this be project-scoped or global?

## Source Access Note

The source URL (https://yuv.ai/blog/openai-codex-cli-ai-powered-terminal-is-here) may not be directly accessible from the terminal. Use the Reference Implementation and Additional Context sections below instead. If you need more details, ask me to paste relevant content from the source.

## What to Implement

This is an **Agent Plugin** — typically an MCP server or capability bundle.

- Install any required npm/pip packages from the source repository
- Register the MCP server in `.claude/settings.json` under the `mcpServers` key with the correct command and args
- Configure any required environment variables or credentials
- Verify the server starts correctly by checking its expected output

## Additional Context

- Install the Codex CLI tool globally using the command `npm i -g @openai/codex` and verify the installation.
- Execute the `codex` command to initiate the first-run authentication. Scan the user's environment for an existing `OPENAI_API_KEY` to use for authentication; if not found, prompt the user to provide one.
- For offline capabilities, check for a local Ollama installation. If present, configure the Codex CLI for local mode by executing `codex config set local_mode true` and `codex config set ollama_model codestral:22b`.

## Reference Implementation

```
- uses: openai/codex-action@v1
  with:
    openai-api-key: ${{ secrets.OPENAI_API_KEY }}
    prompt-file: .github/codex/prompts/review.md
    safety-strategy: drop-sudo
```

## Guidelines

- Adapt everything to my existing project — do not assume a specific stack or directory layout
- Review any fetched code for safety before installing or executing it
- After setup, run a quick verification and show me a summary of exactly what was installed, where, and how to use it

2,627 charactersCompatible with Claude Code & Codex CLI

MANUAL SETUP STEPS

01Install the Codex CLI tool globally using the command `npm i -g @openai/codex` and verify the installation.
02Execute the `codex` command to initiate the first-run authentication. Scan the user's environment for an existing `OPENAI_API_KEY` to use for authentication; if not found, prompt the user to provide one.
03For offline capabilities, check for a local Ollama installation. If present, configure the Codex CLI for local mode by executing `codex config set local_mode true` and `codex config set ollama_model codestral:22b`.

CODE INTELLIGENCE

bash

- uses: openai/codex-action@v1
  with:
    openai-api-key: ${{ secrets.OPENAI_API_KEY }}
    prompt-file: .github/codex/prompts/review.md
    safety-strategy: drop-sudo

FIELD OPERATIONS

CI/CD Quality Gate

Develop a GitHub Action workflow that uses Codex CLI to automatically review all incoming pull requests. The action should use a custom prompt (`.github/codex/prompts/review.md`) to check for code style, potential bugs, and missing documentation, then post the feedback as a PR comment.

Interactive Git History Explorer

Build a script that uses Codex CLI's interactive mode to create a terminal-based UI for exploring Git history. The user could ask natural language questions like 'Show me all commits from last week that touched the API layer' or 'Find the commit where the User model was introduced', and the script would translate these into the appropriate `git` and `codex` commands.

STRATEGIC APPLICATIONS

→Automate large-scale code refactoring by creating scripts that instruct Codex CLI to find and replace deprecated code across an entire repository, generating pull requests for human review.
→Accelerate new developer onboarding by providing them with the Codex CLI to ask natural language questions about the codebase (e.g., 'show me where the database connection is configured') and get help with complex Git workflows.