Discovering Codex

Understand Codex and get started

  • Codex

1250 € per session, excl. VAT

In short

Discover how Codex uses a repository, its instructions and tools to handle a development task. In a demonstration environment, prepare a plan, limit permissions, inspect a diff and run tests. Deliver a small change with a review dossier and rollback procedure, without deployment or automatic production validation.

Why this training?

The problem
Fragmented uses and results that are hard to verify.
What it costs today
Manual rework and decisions based on incomplete information.
Why this skill
A Codex task on a demonstration repository with a reviewed diff, tests and an approval log.
What you gain
A Codex task on a demonstration repository with a reviewed diff, tests and an approval log.

Objectives of this training

  • A Codex task on a demonstration repository with a reviewed diff, tests and an approval log.
  • Distinguish conversation, development agent and tool execution; navigate a demonstration repository, its tree, instructions and tests. Explain available context, working branch and least privilege without secrets or deployment.
  • Request a change plan and tests for a simple correction; inspect affected files, assumptions and proposed commands and approve only in-scope actions.
  • Inspect added and removed lines, run available tests and read results; distinguish passing tests, insufficient coverage and human approval. Correct an edge case without expanding scope.
  • Independently complete a bounded change with plan, diff and tests; tour available reusable instructions or skills without granting them additional permissions.

Who is it for and what are the prerequisites?

Roles and tasks concerned

  • Staff using Codex for professional tasks
  • Team leads evaluating uses of this tool

Prior skills

  • AI Fundamentals and AI Prompting completed, or equivalent experience (a learning prerequisite, not a registration condition).
  • No prior mastery of this tool required; be able to use a browser and prepare a non-sensitive work example. Compatible Codex account and authorised demonstration environment; verify repository, terminal, tests and connectors with least privilege. No secrets or live deployment; human review is required, with no automatic production validation.
  • A paid subscription to an AI solution offering the features used, the organisation’s authorisation for third-party tools, and the actual accounts and access rights.

To prepare before the session

  • Compatible Codex account and authorised demonstration environment; verify repository, terminal, tests and connectors with least privilege. No secrets or live deployment; human review is required, with no automatic production validation.

What you will work on

  1. Understand Codex, repositories and permissions

    Distinguish conversation, development agent and tool execution; navigate a demonstration repository, its tree, instructions and tests. Explain available context, working branch and least privilege without secrets or deployment.

  2. Plan a change before executing it

    Request a change plan and tests for a simple correction; inspect affected files, assumptions and proposed commands and approve only in-scope actions.

  3. Read diffs, run tests and correct

    Inspect added and removed lines, run available tests and read results; distinguish passing tests, insufficient coverage and human approval. Correct an edge case without expanding scope.

  4. Deliver a small task and prepare its review

    Independently complete a bounded change with plan, diff and tests; tour available reusable instructions or skills without granting them additional permissions.

What you take away

  • A Codex task on a demonstration repository with a reviewed diff, tests and an approval log.
  • Log of trials, corrections and checks.

Method and assessment

  • Demonstration of available features, guided exercises and an independent case.
  • Peer review of the deliverable and correction against original sources.

The participant presents the stated deliverable, justifies sources and permissions, identifies and corrects an error and explains limitations. Assessment rubric: accuracy, traceability, access control and handover to a colleague.

Frequently asked questions

What concrete outcome is assessed?

A Codex task on a demonstration repository with a reviewed diff, tests and an approval log.

What access is needed before the session?

Compatible Codex account and authorised demonstration environment; verify repository, terminal, tests and connectors with least privilege. No secrets or live deployment; human review is required, with no automatic production validation.

Which step should come before this course?

No prior mastery of this tool required; be able to use a browser and prepare a non-sensitive work example.

How are data protected and results validated?

Use fictional, anonymised or explicitly authorised data. Your organisation’s designated person checks sources, rights and results before use; subscriptions and external access are not assumed to be included.

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