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Codex for Complete Beginners
You do not need to be an expert developer to start. You need a safe workflow, clear prompts, and enough coding literacy to review what Codex does.
What Codex Is
Codex is OpenAI’s coding agent for software development. It can help write, understand, review, debug, and automate development tasks. You still need human review, tests, and safe publishing habits.
What Setup You Need
Minimum
A project or page draft, a safe place to test, and a clear outcome.
Recommended
Git, GitHub, local project access, a code editor, and a preview or staging workflow.
Optional
Vercel, Codex CLI, IDE extension, cloud/web tasks, skills, MCP, and subagents when your surface supports them.
The First 10 Lessons To Take
- Course Orientation and Setup: Welcome to Codex Zero to Hero
- Course Orientation and Setup: How to Use This Course Without Getting Overwhelmed
- Course Orientation and Setup: Pick Your Builder Path
- What Codex Is and Why It Matters: What Codex Is in Plain English
- Absolute Beginner Coding Concepts: What Code Is
- Developer Environment Setup: What a Terminal Is
- Git and GitHub for Codex Users: What Git Tracks
- How to Think Like a Builder: Outcomes Before Tools
- Codex Prompting Foundations: Goal, Context, Constraints, Done-When
- The /goal Method: What Goal Mode Does
The First 10 Prompts To Try
- Help me with beginner. Inspect first, explain simply, and suggest one safe next step.
- Help me with repo inspection. Inspect first, explain simply, and suggest one safe next step.
- Help me with learning. Inspect first, explain simply, and suggest one safe next step.
- Help me with /goal. Inspect first, explain simply, and suggest one safe next step.
- Help me with planning. Inspect first, explain simply, and suggest one safe next step.
- Help me with wordpress. Inspect first, explain simply, and suggest one safe next step.
- Help me with landing page. Inspect first, explain simply, and suggest one safe next step.
- Help me with html/css/js. Inspect first, explain simply, and suggest one safe next step.
- Help me with react. Inspect first, explain simply, and suggest one safe next step.
- Help me with next.js. Inspect first, explain simply, and suggest one safe next step.
Your First Beginner Project
Build a one-page personal project brief in WordPress Custom HTML or a local HTML file. Ask Codex to create a scoped layout, review mobile behavior, and explain every section before you publish.
Safety Rules
- Do not paste secrets, API keys, private customer data, or passwords.
- Do not let Codex deploy straight to production.
- Use branches and previews.
- Review diffs and test results.
- Keep rollback instructions.
How Not To Get Overwhelmed
Take one lesson, run one tiny exercise, and save one useful prompt. You are not trying to become a senior engineer in one sitting. You are learning how to steer the agent with judgment.
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