Course · ChatGPT Codex for Builders

ChatGPT Codex Training for Development Teams (Codex for Builders)

A course for development teams that want to bring Codex into real work: setting it up in a repository, handing work to it as an agent, reviewing what the agent does, and putting guardrails in place so the team can use it safely.

Level
Advanced
Length
1 day
Hours
09:00–16:00
Tools
Codex
Format
Onsite or online, hands-on

This course runs in-house at your organisation, taught in English or Thai, with cases and exercises rebuilt from the work of the department taking it.

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What you will be able to do

  • Set up Codex to work with your organisation's repositories through AGENTS.md and Skills
  • Hand multi-file tasks to the agent and see them through to a pull request with tests
  • Review and check the code the agent writes systematically, rather than accepting it wholesale
  • Use the sandbox, auto-review and network access controls appropriately
  • Measure whether development really gets faster without more defects

One-day schedule

09:00–16:00 · topics, cases and exercises can be adapted to your organisation’s work · can be extended to two days for a longer workshop on real work

  1. 09:00–10:30

    Coding agents and setting up Codex

    • What a coding agent is, and how it differs from code completion
    • Installing and setting up Codex with a real repository
    • AGENTS.md and Skills: teaching the agent to work to the team's standards

    ActivitySet up Codex with the team's repository and write a first AGENTS.md

  2. 10:30–10:45

    Break

  3. 10:45–12:00

    Handing over work through to a pull request

    • Assigning work, following it and stepping in midway
    • From branch to pull request: tests, review and merge
    • Breaking large work into pieces the agent can do one at a time

    ActivityAssign one task and see it through to a pull request with tests

  4. 12:00–13:00

    Lunch

  5. 13:00–14:30

    Review and security

    • Reviewing the agent's code systematically, not accepting it wholesale
    • The sandbox, permissions and network access for organisations
    • Auto-review, and the points a person must check themselves

    ActivityReview a pull request from the agent with the team's checklist

  6. 14:30–14:45

    Break

  7. 14:45–16:00

    Choosing the tool, and a workshop from the backlog

    • Comparing Codex with Claude Code, and choosing the right one for the job
    • Measuring whether work really gets faster without more defects

    ActivityWorkshop: real work from the team's backlog

Before the class

  • A team that already writes code and uses git
  • An account that can use Codex, and a repository you can practise on

Frequently asked questions

What background does the team need?
The team must already write code and use git. The course does not teach programming basics; it teaches how to work with an agent that writes code.
Should a team that already uses Claude Code take it?
If your organisation is in the OpenAI ecosystem, or is comparing the two, this course has a module that compares them directly. If you already use Claude Code and are happy with it, see the Claude Code Fundamentals course instead.

Contact

Talk to us about training your team

Send a rough brief — how many people, which functions, and what they should be able to do afterwards — and we reply with a format and a quotation. We correspond in English or Thai; quotations and documents are issued by Trainiac Co., Ltd. for your procurement process.

Email
hello@trainiac.ai
Phone
061-894-0404
LINE Official Account
@trainiac
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