Codex Zero to Hero
Module 01: What Codex Is and Why It Matters
A practical module for moving from concept to safe Codex execution.
Learning Outcomes
- Explain the topic in beginner-friendly language.
- Prompt Codex with context, constraints, and done-when criteria.
- Review output safely before publishing.
Safety Note
Use branches, backups, previews, and human review. Do not deploy untested code or commit secrets.
Module progress
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Lessons
What Codex Is in Plain English
By the end, learners can explain what codex is in plain english, ask Codex for focused help, review the result, and decide the next safe step.
Where Codex Fits in Modern Software Development
By the end, learners can explain where codex fits in modern software development, ask Codex for focused help, review the result, and decide the next safe step.
What Codex Can and Cannot Do
By the end, learners can explain what codex can and cannot do, ask Codex for focused help, review the result, and decide the next safe step.
Codex App vs CLI vs IDE Extension vs Cloud/Web
By the end, learners can explain codex app vs cli vs ide extension vs cloud/web, ask Codex for focused help, review the result, and decide the next safe step.
Availability, Plans, Rollouts, and Surface Differences
By the end, learners can explain availability, plans, rollouts, and surface differences, ask Codex for focused help, review the result, and decide the next safe step.
The Human Review Loop
By the end, learners can explain the human review loop, ask Codex for focused help, review the result, and decide the next safe step.
Module Capstone: Choose the Right Codex Surface
By the end, learners can explain module capstone: choose the right codex surface, ask Codex for focused help, review the result, and decide the next safe step.
Module Project
Create a practical artifact for what codex is and why it matters: a prompt pack, checklist, issue brief, page draft, QA report, or deployment note.
Quiz
- What context should Codex inspect first?
- What should you review before accepting changes?
- What rollback step protects the work?
Answer key
Inspect relevant files and errors, review diffs and tests, and keep a backup, branch, or preview rollback plan.
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