Codex Zero to Hero
Module 14: Codex for Testing, QA, and Refactoring
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
0/7 lessons complete – 0% complete
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Lessons
What Tests Are For
By the end, learners can explain what tests are for, ask Codex for focused help, review the result, and decide the next safe step.
Linting, Formatting, and Type Checks
By the end, learners can explain linting, formatting, and type checks, ask Codex for focused help, review the result, and decide the next safe step.
Manual QA That Beginners Can Do
By the end, learners can explain manual qa that beginners can do, ask Codex for focused help, review the result, and decide the next safe step.
Accessibility and Mobile QA
By the end, learners can explain accessibility and mobile qa, ask Codex for focused help, review the result, and decide the next safe step.
Refactor Without Changing Behavior
By the end, learners can explain refactor without changing behavior, ask Codex for focused help, review the result, and decide the next safe step.
Ask Codex for a Review Pass
By the end, learners can explain ask codex for a review pass, ask Codex for focused help, review the result, and decide the next safe step.
Module Capstone: QA and Refactor Plan
By the end, learners can explain module capstone: qa and refactor plan, ask Codex for focused help, review the result, and decide the next safe step.
Module Project
Create a practical artifact for codex for testing, qa, and refactoring: 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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