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Kingy AI professional course

Codex Zero to Hero

Learn OpenAI Codex, GitHub, Git, Vercel, AI coding agents, and real-world software shipping from absolute beginner to expert workflows.

This course teaches product-builder thinking: define outcomes, prompt clearly, inspect safely, review code, test changes, protect secrets, and ship with rollback plans.

Start here if you are a complete beginnerOpen prompt library

What You Will Learn

Codex foundations

What Codex is, where it fits, and how surfaces differ.

Git and GitHub

Branches, commits, issues, pull requests, reviews, and safe undo.

WordPress and web apps

Custom HTML pages, tools, calculators, dashboards, React, Next.js, and QA.

Expert workflows

CLI, cloud/web tasks, skills, MCP, subagents, evals, security, and capstones.

What Codex Can Help You Build

Websites and landing pages

Improve pages, fix layout bugs, build scoped WordPress assets, and review mobile behavior.

Apps and dashboards

Create small web apps, dashboards, forms, reports, and internal tools with reviewable steps.

Shipping systems

Use issues, branches, PRs, previews, QA checks, deployment notes, and rollback plans.

Learning Paths

Beginner path

Modules 0-7 for vocabulary, setup, prompting, and /goal.

WordPress publisher path

Modules 2, 6, 9, 10, 19, and 23.

Founder/operator path

Modules 5, 11, 17, 18, 21, and 24.

Web app builder path

Modules 3, 11, 12, 13, 14, 16.

Developer path

Modules 4, 8, 13, 14, 15, 20, 22.

GitHub/Vercel path

Modules 4, 15, 16, 23.

Full Curriculum

25 modules, 175 lessons, 500+ prompts, 200+ glossary terms, quizzes, assets, capstones, and owner publishing instructions.

Module 00

Course Orientation and Setup

7 lessons

  1. Welcome to Codex Zero to Hero
  2. How to Use This Course Without Getting Overwhelmed
  3. Pick Your Builder Path
  4. Set Up Your Learning Workspace
  5. Create Your First Safety Rules
  6. Use the Course Progress Tracker
  7. Orientation Mini-Capstone: Your Codex Learning Plan

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Module 01

What Codex Is and Why It Matters

7 lessons

  1. What Codex Is in Plain English
  2. Where Codex Fits in Modern Software Development
  3. What Codex Can and Cannot Do
  4. Codex App vs CLI vs IDE Extension vs Cloud/Web
  5. Availability, Plans, Rollouts, and Surface Differences
  6. The Human Review Loop
  7. Module Capstone: Choose the Right Codex Surface

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Module 02

Absolute Beginner Coding Concepts

7 lessons

  1. What Code Is
  2. What a Repo Is
  3. What a File Tree Is
  4. HTML, CSS, and JavaScript in Plain English
  5. Frontend, Backend, and Full Stack
  6. Dependencies, Package Managers, and Build Tools
  7. Module Capstone: Explain a Simple Web Project

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Module 03

Developer Environment Setup

7 lessons

  1. What a Terminal Is
  2. What a Command Is
  3. Local Project vs Production Site
  4. Install and Check Git Conceptually
  5. Node.js, npm, and Project Scripts
  6. Editors, IDEs, and Codex Context
  7. Module Capstone: Prepare a Safe Local Workspace

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Module 04

Git and GitHub for Codex Users

7 lessons

  1. What Git Tracks
  2. Branches, Commits, and Diffs
  3. Pull Requests and Code Reviews
  4. Merge Conflicts in Plain English
  5. GitHub Issues as Codex Task Briefs
  6. Secrets, .gitignore, and Safe Undo
  7. Module Capstone: Run a Safe Branch Workflow

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Module 05

How to Think Like a Builder

7 lessons

  1. Outcomes Before Tools
  2. Turn Ideas into User Stories
  3. Define Done Before Codex Starts
  4. Slice Large Projects into Small Changes
  5. Design for Reviewability
  6. Use Constraints to Improve Results
  7. Module Capstone: Write a Build Brief

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Module 06

Codex Prompting Foundations

7 lessons

  1. Goal, Context, Constraints, Done-When
  2. Small Prompt vs Large Prompt
  3. Use File References and Examples
  4. Ask for Plan, Edit, Test, Explain
  5. Bad Prompt vs Better Prompt vs Expert Prompt
  6. Prompting for Design Without Vague Taste Words
  7. Module Capstone: Build a Prompt Pack

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Module 07

The /goal Method

7 lessons

  1. What Goal Mode Does
  2. When to Use /goal vs a Normal Prompt
  3. Write Measurable Goal Criteria
  4. Split Giant Goals into Goal Phases
  5. Steer, Pause, Resume, and Edit Goals
  6. Ask Codex for Status Without Losing the Thread
  7. Module Capstone: Create a Production-Ready /goal

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Module 08

Codex for Reading and Understanding Codebases

7 lessons

  1. Ask Codex to Inspect Before Editing
  2. Map a Repo Without Panic
  3. Find the Files That Control a Feature
  4. Explain Data Flow and User Flow
  5. Ask for Risks and Unknowns
  6. Create Repo Notes and AGENTS.md-Style Guidance
  7. Module Capstone: Codebase Orientation Report

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Module 09

Codex for Editing Existing Websites

7 lessons

  1. Make Small Website Changes Safely
  2. Fix Layout Bugs Without Breaking Themes
  3. Inspect CSS Before Adding CSS
  4. Work With Images, Links, and Navigation
  5. Mobile-First Website Edits
  6. Request Before/After QA Notes
  7. Module Capstone: Improve an Existing Page

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Module 10

Codex for Building Landing Pages and WordPress Assets

7 lessons

  1. Plan a WordPress Custom HTML Page
  2. Scope CSS Under a Parent Class
  3. Build Fast, Semantic Sections
  4. Create Prompt Libraries and Glossaries
  5. Create Calculators Without Backend Risk
  6. Avoid Duplicate Schema and Empty Links
  7. Module Capstone: Publish-Ready WordPress Asset

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Module 11

Codex for Building Web Apps

7 lessons

  1. From Feature Idea to App Scope
  2. Static Prototype vs Real App
  3. Forms, State, and Local Storage
  4. API Calls and Error States
  5. Dashboard and Internal Tool Patterns
  6. App QA Before Shipping
  7. Module Capstone: Mini Web App

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Module 12

Codex for JavaScript, TypeScript, React, and Next.js

7 lessons

  1. JavaScript You Need to Read AI Code
  2. TypeScript in Plain English
  3. React Components and Props
  4. State, Events, and Effects
  5. Next.js Routing and Rendering Basics
  6. Ask Codex to Modernize Carefully
  7. Module Capstone: React/Next.js Feature

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Module 13

Codex for Debugging and Fixing Bugs

7 lessons

  1. Give Codex Reproduction Steps
  2. Read Error Messages
  3. Debug Frontend Layout Problems
  4. Debug Build and Dependency Problems
  5. Debug API and Environment Variable Issues
  6. Ask for Root Cause, Fix, and Regression Test
  7. Module Capstone: Bug Fix Report

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Module 14

Codex for Testing, QA, and Refactoring

7 lessons

  1. What Tests Are For
  2. Linting, Formatting, and Type Checks
  3. Manual QA That Beginners Can Do
  4. Accessibility and Mobile QA
  5. Refactor Without Changing Behavior
  6. Ask Codex for a Review Pass
  7. Module Capstone: QA and Refactor Plan

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Module 15

Codex for GitHub Issues, Branches, Pull Requests, and Reviews

7 lessons

  1. Turn Ideas into GitHub Issues
  2. Ask Codex to Work From an Issue
  3. Create Clean Branches and Commits
  4. Write Better Pull Request Descriptions
  5. Review Diffs Like an Owner
  6. Address Review Comments Safely
  7. Module Capstone: Ship a Pull Request

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Module 16

Codex for Deployments, Vercel, Hosting, and Rollbacks

7 lessons

  1. What Deployment Means
  2. When Vercel Fits
  3. Connect GitHub to Vercel Conceptually
  4. Preview Deployments and Production Deployments
  5. Build Errors, Logs, and Environment Variables
  6. Rollback and Incident Basics
  7. Module Capstone: Deployment Readiness Plan

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Module 17

Codex for Data Projects, Reports, Dashboards, and Automation

7 lessons

  1. CSV and Spreadsheet Workflows
  2. Ask Codex for Data Cleaning Plans
  3. Build a Report Generator
  4. Create a Dashboard Prototype
  5. Local Automations With Human Approval
  6. Document Repeatable Data Workflows
  7. Module Capstone: Data Report Workflow

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Module 18

Codex for APIs, Integrations, and Environment Variables

7 lessons

  1. What an API Is
  2. Endpoints, Requests, and Responses
  3. Environment Variables and Secrets
  4. Mock APIs Before Real Credentials
  5. Handle Errors and Rate Limits
  6. Security Review for Integrations
  7. Module Capstone: Safe API Integration Brief

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Module 19

Codex for WordPress, SEO Tools, Calculators, and Interactive Pages

7 lessons

  1. WordPress Page Types and Blocks
  2. Custom HTML Block Safety
  3. Build an SEO Helper Tool
  4. Build a Calculator
  5. Create Internal Links Without Fake URLs
  6. Owner-Friendly Publishing Instructions
  7. Module Capstone: WordPress Tool Page

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Module 20

Advanced Codex CLI, Config, Models, and Local Workflows

7 lessons

  1. CLI Mental Model
  2. CLI Slash Commands and Goal Mode
  3. Config Basics and Project Defaults
  4. Approvals, Sandbox Concepts, and Permissions
  5. Model Selection Without Overpromising
  6. Non-Interactive and Scripted Workflows
  7. Module Capstone: Local Codex Workflow

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Module 21

Codex Cloud/Web, Parallel Tasks, and Long-Running Work

7 lessons

  1. Local Threads vs Cloud Threads
  2. Cloud Environment Basics
  3. Parallel Task Planning
  4. Avoid File Conflicts Across Threads
  5. Long-Running Goals and Status Updates
  6. Review Cloud Results Before Merging
  7. Module Capstone: Parallel Work Plan

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Module 22

Skills, MCP, Subagents, and Expert Agent Workflows

7 lessons

  1. What Skills Are
  2. What MCP Is
  3. When to Use Connectors and MCP Servers
  4. Subagents and Parallel Review
  5. Custom Agents and Role Design
  6. Evaluation Loops and Scored Improvement
  7. Module Capstone: Expert Agent Workflow

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Module 23

Security, Privacy, Secrets, Safe Automation, and Production Readiness

7 lessons

  1. Secrets and API Keys
  2. .env and .gitignore Safety
  3. Least Privilege Permissions
  4. Dependency and Supply Chain Risk
  5. Prompt Injection and Untrusted Content
  6. Production Readiness Checklist
  7. Module Capstone: Security Review

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Module 24

Expert Capstones, Portfolio Projects, and Certification

7 lessons

  1. Choose Your Capstone Track
  2. Capstone 1: WordPress Course Page System
  3. Capstone 2: SaaS Landing Page and Calculator
  4. Capstone 3: Next.js Dashboard
  5. Capstone 4: GitHub/Vercel Shipping Workflow
  6. Final Exam Preparation
  7. Certification Checklist and Portfolio Story

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Capstone Preview

WordPress course system

Build and QA a scoped WordPress course page with prompts and downloads.

Next.js dashboard

Plan, build, test, deploy, and review a small dashboard.

Shipping workflow

Run a GitHub issue to PR to Vercel preview workflow with rollback notes.

FAQ

Do I need to be a developer?

No. The course starts with plain-English coding concepts, then builds toward expert workflows.

Does everyone have every Codex feature?

No. Availability can depend on plan, account type, operating system, app version, workspace settings, organization settings, rollout status, and product surface.

Can I deploy generated code directly?

No. Review all code, test in local or preview environments, protect secrets, and keep rollback steps.

Related Kingy AI Resources

Kingy AI homepage

Confirmed Kingy AI page for related learning or business context.

Source and Accuracy Note

Codex features change. This course was prepared from official OpenAI Codex docs/manual plus official Git, GitHub, Vercel, WordPress, MDN, Node.js, Next.js, and React docs. Verify plan-dependent and rolling features before publishing claims.

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