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Learn how to use Codex to accelerate real-world coding workflows and developer productivity.
Created by @ExamProChannel
Course info:
❤️ Support for this channel comes from our friends at Scrimba – the coding platform that's reinvented interactive learning:
⭐️ Contents ⭐️
- 00:00 Introduction
- 01:33 Codex Essentials
- 03:02 The AI Certification Roadmap
- 06:51 Study Recommendations & Passing Requirements
- 09:23 Validity and Re-certification
- 11:26 Accessing the Code Repository Codeex Fundamentals
- 12:10 What is Codeex? Agentic Coding vs. Coding Harness
- 13:39 Common Use Cases and Skills
- 14:21 Understanding the Agentic Loop
- 15:40 OpenAI GPT Model Families
- 17:27 Deep Dive: Model Intelligence vs. Context Windows
- 21:52 Installation Requirements (Node.js & WSL 2)
- 23:00 Authentication: Subscription vs. API Keys
- 23:32 Checking Login Status and Account Info
- 24:33 Lab: Installing Codeex and "Hello World"
- 29:32 Using API Keys for Production and Automation
- 32:26 Setting Environment Variables for Keys
- 36:00 Subscriptions vs. API Token Billing
- 38:08 Managing the Context Window (400k Token Limits)
- 40:06 Truncation and Hallucination Issues
- 40:36 Commands: /clear and /compact
- 41:17 Lab: Managing Context History
- 50:27 Codeex Sessions, Threads, and Messages
- 51:25 Session Commands: /new, /resume, /fork, and /rename
- 52:48 Under the Hood: SQLite and JSONL Session Storage
- 1:01:01 Tracking Usage with Custom Scripts
- 1:13:53 Custo
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2026/04/14
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