codex

Lightweight coding agent that runs in your terminal

24 articles

How to Configure Custom Prompts in the Codex CLI: A Complete Guide

Master the Codex CLI: Learn to configure custom prompts using YAML or JSON files for efficient command-line interactions. Boost your productivity today.

how-to-guide

Mar 6, 2026

Where to Find Codex CLI Configuration Documentation: The Complete Guide

Find Codex CLI configuration documentation in three official locations including a basic guide, advanced guide, and auto-generated JSON schema. Get the complete guide here.

documentation

Mar 6, 2026

How to Use Slash Commands Within Codex CLI: A Developer Guide

Learn how developers use slash commands in Codex CLI. Trigger handler functions via the TypeScript SDK with simple forward-slash inputs. This guide details the five-stage detection pipeline.

how-to-guide

Mar 6, 2026

Codex CLI Skills System: Architecture, Features, and Implementation Guide

Explore the Codex CLI skills system's features. This plugin framework offers automatic tool invocation, caching, and UI controls for a seamless developer experience.

architecture

Mar 6, 2026

Codex CLI Authentication: How the Device-Code Flow Works with ChatGPT

Learn how Codex CLI uses Rust and OAuth 2.0 device code flow for secure authentication with ChatGPT. Get a one-time code, verify in your browser, and store tokens locally.

how-to-guide

Mar 6, 2026

How the Codex CLI Configuration System Works: Complete config.toml Guide

Explore the Codex CLI configuration system and understand how config.toml works. Learn about layered sources, strict precedence, and atomic edits.

internals

Mar 6, 2026

How MCP Server Support is Implemented in OpenAI Codex

Explore how MCP server support is implemented in OpenAI Codex. Discover its Rust architecture, JSON-RPC connections, and TUI integration for seamless tool management.

internals

Mar 6, 2026

Sandbox Implementations Supported by Codex CLI: macOS, Linux, and Windows

Discover Codex CLI sandbox implementations for macOS Seatbelt, Linux Landlock seccomp, and Windows restricted-token. Secure your code execution across platforms.

how-to-guide

Mar 6, 2026

Where Are the Application Server Protocol Definitions in OpenAI Codex?

Find application server protocol definitions in OpenAI Codex within the codex-rsapp-server-protocol crate at srcprotocolv2rs and commonrs. Explore the JSON-RPC wire format.

deep-dive

Mar 6, 2026

What Is the app-server Component in OpenAI Codex?

Discover the app-server component in OpenAI Codex. Learn how this JSON-RPC 2.0 gateway enables conversation management, model generation, and tool execution for Codex clients.

internals

Mar 6, 2026

What Is the CLI Directory in the OpenAI Codex Project?

Explore the CLI directory in the OpenAI Codex project. Discover how it implements the command-line interface for legacy TypeScript and modern Rust binaries, handling parsing, loading, and sandboxed execution.

internals

Mar 6, 2026

What Is the exec Directory in Codex? The Engine Behind Scriptable AI Execution

Discover the exec directory in Codex and understand its role as an event-driven execution engine for scriptable AI. Learn about JSON output, sandbox policies, and automated approvals.

internals

Mar 6, 2026

Have a question about this repo?

These articles cover the highlights, but your codebase questions are specific. Give your agent direct access to the source. Share this with your agent to get started:

Share the following with your agent to get started:

curl -s "https://instagit.com/install.md"

Add to your MCP client configuration:

{
  "mcpServers": {
    "instagit": {
      "command": "npx",
      "args": ["-y", "instagit@latest"]
    }
  }
}

Ask your agent:

"Use Instagit MCP to understand how openai/codex works."

Works with

Claude Codex Cursor VS Code OpenClaw Any MCP Client

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