Codex CLI Tutorial: Local Terminal Agent Workflows with OpenAI Codex

Learn how to use openai/codex to run a lightweight coding agent locally, with strong controls for auth, configuration, MCP integration, and sandboxed execution.

Why This Track Matters

Codex CLI provides a high-velocity local coding-agent loop in terminal-first workflows while keeping strong configuration and policy controls.

This track focuses on:

• installing and running Codex CLI quickly
• understanding local execution and agent control surfaces
• configuring auth, MCP, and sandbox settings safely
• operating Codex in team and production-adjacent workflows

Current Snapshot (auto-updated)

• repository: openai/codex
• stars: about 89.6k
• GitHub release reference: rust-v0.137.0 (checked 2026-06-08; release metadata on GitHub)

Mental Model

flowchart LR
    A[Task in terminal] --> B[Codex CLI agent loop]
    B --> C[Model reasoning and tool calls]
    C --> D[Sandbox and approval controls]
    D --> E[MCP and connector integrations]
    E --> F[Code changes and review]

Chapter Guide

Chapter	Key Question	Outcome
01 - Getting Started	How do I install and run Codex CLI quickly?	Working baseline
02 - Architecture and Local Execution Model	How does Codex run locally and structure agent behavior?	Strong mental model
03 - Authentication and Model Configuration	How do I configure access and model settings safely?	Stable auth/config baseline
04 - Sandbox, Approvals, and MCP Integration	How do I control risk while extending capability?	Safer operation patterns
05 - Prompts, Skills, and Workflow Orchestration	How do I shape agent behavior for repeatable outcomes?	Better prompt/skill discipline
06 - Commands, Connectors, and Daily Operations	How do I run Codex efficiently day-to-day?	Higher operator productivity
07 - Advanced Configuration and Policy Controls	How do teams standardize Codex behavior?	Team policy baseline
08 - Contribution Workflow and Ecosystem Strategy	How do contributors extend Codex responsibly?	Contributor readiness

What You Will Learn

• how to run Codex CLI in reliable local workflows
• how to configure auth, sandboxing, and MCP safely
• how to codify prompt/skill patterns for consistency
• how to contribute and operate Codex in team contexts

Source References

• Codex Repository
• Codex README
• Codex Documentation
• Codex Config Docs
• Codex Security Docs
• Codex Contributing Docs

Related Tutorials

• Claude Code Tutorial
• OpenCode Tutorial
• Goose Tutorial
• MCP Servers Tutorial

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Start with Chapter 1: Getting Started.

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Full Chapter Map

1. Chapter 1: Getting Started
2. Chapter 2: Architecture and Local Execution Model
3. Chapter 3: Authentication and Model Configuration
4. Chapter 4: Sandbox, Approvals, and MCP Integration
5. Chapter 5: Prompts, Skills, and Workflow Orchestration
6. Chapter 6: Commands, Connectors, and Daily Operations
7. Chapter 7: Advanced Configuration and Policy Controls
8. Chapter 8: Contribution Workflow and Ecosystem Strategy

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