Module · Codex Engineer
Review & Guardrails
What a human still has to check, and the guardrails that keep an agent harmless.
TOPIC 01
The Review Pass
A checklist, a diff read, and a verdict a human can act on.
What you'll practice
- Write the Review Checklist — practice · intermediate
- Review a Diff Like a Reviewer — challenge · advanced
A command you'll meet
cat ~/codex/review-checklist.mdThe agent writes the code, a human still owns the merge. Open the task below for the full walkthrough.
Hands-On Tasks in This Topic (2)
Write the Review Checklist
AI-written code needs a different checklist - the bugs are the plausible ones, not the silly ones. Write the list your reviewers use.
Review a Diff Like a Reviewer
A review is a structured argument, not a feeling. Write the format your review notes follow so the findings are actionable.
TOPIC 02
Sandbox & Secrets
The limits that keep a fast agent from becoming an incident.
What you'll practice
- Write the Sandbox Policy — practice · intermediate
- Scan a Diff for Secrets — challenge · advanced
A command you'll meet
cat ~/codex/sandbox-policy.mdThe sandbox is the blast radius. Open the task below for the full walkthrough.
Hands-On Tasks in This Topic (2)
Write the Sandbox Policy
The sandbox decides what a mistake can break. Write the policy that maps the three modes to the situations they fit.
Scan a Diff for Secrets
A generated diff can contain a credential that was in the context. Write the scan that catches it before the commit leaves the machine.