21-Day ChatGPT Codex Challenge
Your challenge is ready.
10-15 minutes a day. One practical task. Real results. Work through the days in order - each one builds on the last.
Setup and First Safe Wins
Install Codex and run your first safe prompt
02ChatGPT vs Codex - know which tool to use
03Plan Mode - make Codex think before it builds
04Open a project without breaking anything
05Approval modes - when to use Suggest, Auto Edit, and Full Auto
06Read Codex output without panicking
07Week 1 build day - one safe homepage change from start to finish
Building Confidence
The AGENTS.md file - give Codex permanent project rules
09What to put in AGENTS.md so Codex follows your rules every session
10Slash commands - how to find and use shortcuts safely
11Permissions and approvals - do not let AI run wild
12How to review a diff before accepting changes
13When Codex goes wrong - the exact recovery process
14Week 2 build day - add a contact section with no backend email sending
Power User Moves
Codex skills - reusable instructions for repeated work
16Create your first personal Codex workflow
17Big-build planning - handle complex multi-file tasks safely
18GitHub safety - branches, commits, and how to undo changes
19Use Codex for SEO fixes, UI fixes, and bug fixes
20Build your pre-session safety checklist
21Final build day - plan, build, test, and ship one real improvement
Power user moves
Safe automation in Codex - use repeatable commands, not mystery hooks
B02The context window - why long AI sessions drift and how to reset safely
B03The AGENTS.md checklist - rules every Codex session should follow
B04What MCP is and how to connect Codex to one safe tool first
B05Specialist role prompts - how to give Codex one job at a time
B06Permissions and safety rules before you let Codex touch your files
B07How to read a diff - and why you must before accepting any change
All 7 bonus lessons are included once you unlock the course.