01
Start
Build the operating discipline
Learn the repository-first workflow, instruction hierarchy, and evidence loop that make Codex useful beyond isolated prompts.
Codex learning path
Use Codex as an engineering system, not a shortcut.
A source-backed curriculum for software teams that want faster investigation and delivery without outsourcing judgment, testing, security, or release accountability.
How to use this series
Choose the guide that matches your current engineering constraint.
New users should begin with the production workflow and repository instructions. Experienced teams can move directly to long-running work, parallel agents, modernization, or operating-model design. Every guide keeps human ownership and verifiable evidence in the loop.
02
Verify
Keep quality accountable
Use tests, code review, security checks, and explicit acceptance criteria before treating generated work as complete.
03
Scale
Coordinate longer and parallel work
Separate ownership, preserve durable context, and integrate through one accountable review path.
04
Transform
Modernize systems and workflows
Apply the same controls to legacy modernization and business-wide AI operating models.
Guided curriculum
From first repository task to governed transformation.
- 01How to Use Codex for Production Software DevelopmentA practical operating model for moving from a clear engineering task to tested, review-ready code with Codex while keeping people accountable for what ships.10 min read
- 02How to Write AGENTS.md Without Creating an Instruction DumpA repository context strategy that gives Codex the map it needs without crowding out the code, task, and documentation that matter.8 min read
- 03From Issue to Tested Change: A Codex Delivery WorkflowA repeatable way to turn a well-defined issue into a small, tested, reviewable change with Codex and human release ownership.9 min read
- 04How to Review AI-Generated Code Without Lowering the BarA code-review framework that uses Codex for breadth and investigation while keeping human reviewers responsible for architecture, risk, and release approval.9 min read
- 05How to Learn Software Engineering With Codex Without Outsourcing JudgmentA deliberate practice loop for using Codex to understand unfamiliar systems, improve technical judgment, and learn from real engineering evidence instead of only generating answers.11 min read
- 06Prompts, AGENTS.md, Skills, or Automations: Where Codex Instructions BelongA decision framework for placing Codex guidance in the right layer so project context stays useful, reusable workflows stay portable, and automation remains governed.10 min read
- 07How to Use Codex for Long-Running Work Without Losing ContextA practical system for keeping complex Codex work coherent across many steps, interruptions, reviews, and implementation sessions without relying on memory alone.11 min read
- 08How to Run Parallel Codex Agents Without Merge ChaosA field guide to using subagents and worktrees for real engineering throughput while preserving ownership, test evidence, and a coherent final change.10 min read
- 09How to Modernize Legacy Software With Codex Without a Big-Bang RewriteA practical modernization method that uses Codex to accelerate discovery, characterization, migration, and verification while keeping business continuity in view.12 min read
- 10How to Turn AI Experiments Into a Business Transformation Operating ModelA leadership guide for converting useful AI-assisted work into governed processes, measurable outcomes, stronger teams, and a repeatable transformation capability.12 min read
Apply the practice