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Codex Masterclass

Course Information

  • Sessions 1 day
  • Duration 7.5 hrs
  • Level Beginner
  • Assessment NA

Venue

Kuala Lumpur: G-3A-02, Corporate Office Suite, KL Gateway, No. 2, Jalan Kerinchi, Gerbang Kerinchi Lestari, 59200 Kuala Lumpur, Malaysia

Course Brochure

Download Course Brochure

Certification

  • Certificate of Completion from Tertiary Courses - Upon meeting at least 75% attendance and passing the assessment(s), participants will receive a Certificate of Completion from Tertiary Courses.

Codex Masterclass

Course Code: C989

9 Review(s) | Add Your Review

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What's This Course About

Codex Masterclass teaches you how to master Codex, the agentic coding surface in the ChatGPT desktop app that plans, writes, runs and checks code inside your project while you review and guide the work. Instead of coding every step yourself, you describe the goal, approve the plan and evaluate the result against evidence. The masterclass is designed for developers, technical professionals, analysts and product builders who want to use an AI coding agent to build and govern real applications.

You will start with the fundamentals of Chat, Work and Codex in the ChatGPT app, then work as the AI-assisted developer behind a fictitious cooking school, taking one business from a written brief to a live website. Codex plans the site with /plan, builds it from the course catalogue, adds durable rules in AGENTS.md and a sign-up form for every course, and publishes it to GitHub Pages. Next you will explore tools and build a SQLite RAG assistant, turning course brochures into a knowledge base, driving it to 30 out of 30 golden questions with /goal, red-teaming it and testing the site with Computer Use.

The final topic covers skills and hooks, the features that make an agent dependable, including community skills from skills.sh, custom skills created with the skill creator, a timed workshop popup and a hook that re-checks the site after every edit. Throughout the masterclass you will practise planning before editing, permission control, keeping secrets out of static sites and human review. By the end, you will be able to use Codex confidently to build, test and govern real applications.

Why Take This Course?

  • Hands-On Learning Learn by doing. Every topic is practised hands-on, so you leave with skills you can use at work straight away.
  • Live Coaching Experienced instructors coach you live, answer your questions and guide you step by step.
  • Free Post-Course Consultation Stuck after class? Message your trainer any time for guidance as you apply what you have learned.
  • Always-Updated Materials Materials are refreshed to stay relevant. Log in to our LMS any time to get the latest version.
HRD Corp Claimable

🏦 HRD Corp Claimable

This course is HRD Corp claimable for eligible employers. Grant approval and reimbursement remain subject to HRD Corp requirements, the employer’s available levy and the approved grant details. How the HRD Corp process works →

Course Fee

MYR1,100.00
+ 8% SST

Course Date

Course fees are shown before SST. An 8% SST is included in the estimated total during registration.

Additional Note

Please bring your own laptop for hands-on training. If you don't have laptop, we can provide spare laptop for training use.

Disclaimer: The course dates displayed on our website are tentative and subject to trainer availability. We will confirm the final date after checking with the trainer. You are also welcome to email us your preferred date at sales@tertiarycourses.com.my, and we will do our best to coordinate with the trainer's schedule.

Post-Course Support

  • We may provide consultation related to the subject matter after the course.
  • Please email your queries to sales@tertiarycourses.com.my and we will forward your queries to the subject matter experts and get back to you as soon as possible.

Cancellation & Reschedule Policy

  • We reserve the right to cancel or re-schedule the course due to unforeseen circumstances. If the course is cancelled, we will refund 100% to participants.
  • Note: the venue of the training is subject to changes due to class size and availability of the classroom. The minimum class size to start a class is 3 Pax.

Course Details

Course Details

What You'll Learn

Topic 1: Fundamentals: Chat, Work and Codex

Topic 2: Tools and the SQLite RAG Assistant

Topic 3: Skills and Hooks

Course Info

Minimum Entry Requirement

Knowledge and Skills

  • Able to operate using computer functions
  • Minimum 3 GCE ‘O’ Levels Passes including English or WPL Level 5 (Average of Reading, Listening, Speaking & Writing Scores)

Attitude

  • Positive Learning Attitude
  • Enthusiastic Learner

Experience

  • Minimum of 1 year of working experience.

Target Age Group: 21-65 years old

Minimum Software/Hardware Requirement

Software:

You will need the following for this course:

Hardware: Windows PC or Mac laptop

Appeal Process

  1. The candidate has the right to disagree with the assessment decision made by the assessor.
  2. When giving feedback to the candidate, the assessor must check with the candidate if he agrees with the assessment outcome.
  3. If the candidate agrees with the assessment outcome, the assessor & the candidate must sign the Assessment Summary Record.
  4. If the candidate disagrees with the assessment outcome, he/she should not sign in the Assessment Summary Record.
  5. If the candidate intends to appeal the decision, he/she should first discuss the matter with the assessor/assessment manager.
  6. If the candidate is still not satisfied with the decision, the candidate must notify the assessor of the decision to appeal. The assessor will reflect the candidate’s intention in the Feedback Section of the Assessment Summary Record.
  7. The assessor will notify the assessor manager about the candidate’s intention to lodge an appeal.
  8. The candidate must lodge the appeal within 7 days, giving reasons for appeal 
  9. The assessor can help the candidate with writing and lodging the appeal.
  10. he assessment manager will collect information from the candidate & assessor and give a final decision.
  11. A record of the appeal and any subsequent actions and findings will be made.
  12. An Assessment Appeal Panel will be formed to review and give a decision.
  13. The outcome of the appeal will be made known to the candidate within 2 weeks from the date the appeal was lodged.
  14. The decision of the Assessment Appeal Panel is final and no further appeal will be entertained.
  15. Please click the link below to fill up the Candidates Appeal Form.

Job Roles

Job Roles

  • Digital Marketing Specialist
  • Social Media Manager
  • Online Brand Manager
  • Content Creator
  • Digital Content Specialist
  • Advertising Manager
  • Marketing Analyst
  • E-commerce Specialist
  • Media Planner
  • SEO Specialist
  • Product Manager
  • Community Manager
  • Public Relations Specialist
  • Influencer Marketing Specialist
  • Affiliate Marketing Manager

Trainers

Trainers

Agentic coding tools are part of the daily workflow for Dr. Alfred Ang, a full-stack AI developer, Agentic AI solution architect and corporate trainer who serves as Chief Technology Officer of Tertiary Infotech Academy Pte Ltd, the Singapore training organisation behind Tertiary Courses. Dr. Ang has used coding agents to plan, write, run and check much of the code behind a public GitHub portfolio of more than 300 repositories, spanning web platforms, databases, cloud deployment and native iOS and Android apps. Several projects were built specifically to explore what coding agents can do. One is a dependency-free cooking and baking course catalogue with an AI-assisted course adviser, built as a Codex demonstration, and related projects show a private browser-based course assistant and a SQLite-backed course assistant that answers questions from a small local database. Dr. Ang has also published reusable agent skills, including Claude Code skills that start apps automatically, generate README files, push to Docker Hub and scan for leaked secrets, along with a set of skills that produce complete training documents in a consistent house style. Larger systems, such as an AI-powered content management system and a self-hosted learning and training management system, were developed in close partnership with coding agents. This experience gives Dr. Ang practical insight into how agents behave on real projects and how to guide them well. Dr. Ang regularly compares several coding agents on the same task, which gives a balanced view of their strengths and of the review discipline every agent still requires.

Codex Masterclass turns that insight into a structured path through the agentic coding surface in the ChatGPT desktop app. The first topic covers the fundamentals of chat, work and Codex modes, showing learners when to ask questions, when to delegate a task and how to review the plans, file changes and test runs that Codex produces inside a project. The second topic introduces tools and builds a SQLite RAG assistant, where participants direct Codex to create a small database, load content and build an assistant that answers questions grounded in that data, much like the course-assistant demos Dr. Ang has built. The third topic explores skills and hooks, teaching learners to package repeatable instructions as skills and to use hooks that run checks automatically, so the agent follows project conventions and catches mistakes before they spread. Dr. Ang shares habits refined over many agent-built projects: writing clear task briefs, keeping changes small and reviewable, insisting on tests and never letting secrets slip into the codebase. Sessions are live and hands-on, with learners guiding Codex on their own project while Dr. Ang reviews progress and explains why particular prompts succeed. Developers and technical professionals leave able to delegate real coding work to Codex with confidence. Dr. Ang also explains how to recover when an agent takes a wrong turn, using version control, small checkpoints and focused follow-up instructions to get work back on track quickly. Explore Dr. Ang's agent-built projects at https://github.com/alfredang.

Review

Customer Reviews (9)

Superb training Review by Course Participant/Trainee
1. Do you find the course meet your expectation?
2. Do you find the trainer knowledgeable in this subject?
3. How do you find the training environment
Well organised course with clear objectives. The step-by-step approach made it easy to follow. (Posted on 27/08/2024)
Worth every cent Review by Course Participant/Trainee
1. Do you find the course meet your expectation?
2. Do you find the trainer knowledgeable in this subject?
3. How do you find the training environment
The trainer is an expert in the subject and shared many practical insights from real projects. (Posted on 01/08/2024)
Very informative Review by Course Participant/Trainee
1. Do you find the course meet your expectation?
2. Do you find the trainer knowledgeable in this subject?
3. How do you find the training environment
Very informative and interactive. The small class size meant we got a lot of personal attention. (Posted on 11/07/2024)
Very useful course Review by Course Participant/Trainee
1. Do you find the course meet your expectation?
2. Do you find the trainer knowledgeable in this subject?
3. How do you find the training environment
Really enjoyed the training. The examples were relevant and the pace was just right. (Posted on 08/03/2024)

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