Codex / Codex CLI Practical Hub¶
For / Key Points
This hub is for readers choosing where to start with Codex CLI, approvals, automation, and troubleshooting. Follow the tabs by level to move from setup to safer automation without jumping into advanced patterns too early.
An AI agent deeply integrated with engineering workflows: command execution, review automation, and parallel tasking.
Choose setup, safer automation, or operations and diagnostics based on the job at hand.
What we learned from daily use
Codex CLI operations center on approvals, permissions, and logs/reproducibility. The Plan mode "think then execute" workflow is the most stable pattern.
Connect via ChatGPT for the fastest setup. 15 minutes to get running.
Step 1 — Install and basics
- Overview & Quickstart — ChatGPT-connected fastest setup
- Comprehensive Guide — Install, pricing, security
- Pricing Guide — Free vs paid comparison and switch thresholds
Step 2 — Learn best practices
- Best Practices — Design, change, verify — small and fast
- Hands-on Implementation — From project setup to production operations
📝 Beginner advice: Start with Quickstart → Best Practices. The Pricing Guide can wait until you consider paid plans.
Safely automate with approval policies, Plan mode, and CI integration.
Step 3 — Understand approvals and Plan mode
- No-Approval Guide — Complete guide to No Approval mode
- Approval Policy Implementation — approval_policy patterns
- Plan Mode Complete Guide — Plan → Execute to stop wandering
- /review Command Deep Dive — Integrate auto code review into CI/CD
- Codex Security CLI in CI — Move from report-only scans to a severity gate
Step 4 — Build automation pipelines
- How to use /goal — Enable steps, commands, and objective examples
- What is /goal? — Replace repeated "keep going" prompts with an autonomous loop
- Second-Pass Review — Review plans and diffs in an independent session
- 3 Automation Workflow Patterns — GitHub Actions, cron, CI integration
- GitHub Actions Integration — Run Codex CLI safely in CI
- Session Management — Session control and management
💡 Practitioner's tip: Go "Plan mode → Approval policy → CI integration" in order. Learning Plan mode first naturally reveals why approval design matters.
Diagnose failures from reproducible logs and failure patterns instead of a fixed version list.
Step 5 — Make failures recoverable
- Official releases — Current version and release changes
- Update not reflected — Diagnose duplicate installations and PATH issues
- Diagnostic logs — Find logs and interpret errors
- Production failure patterns — Warning signs and recovery actions
Operating rule: Start from official releases, then verify reproduction steps and rollback options instead of maintaining a static version bulletin.
Troubleshooting¶
| Article | Description |
|---|---|
| Network Restrictions Fix | Common network issue solutions |
| Diagnostic Logs Deep Dive | Troubleshooting practice guide |
| 5 Production Failure Patterns | Quick fixes for common failures |
| Context Window Error | Fix "ran out of room" instantly |
Comparison & Selection¶
| Article | Description |
|---|---|
| Codex CLI vs Claude Code | How to choose in practice |
| 2026 Benchmark Comparison | Accuracy vs speed — which to pick |
Related Topics¶
- Claude Code: Claude Code Article Guide — Comparison and selection
- GitHub Copilot: Copilot Article Guide — Assist vs agent
