Tutorial

Review code with Codex: a practical checklist

Tutorial · 2 min read

Terms in this guide: Fixture · Regression · Verification

Codex can help inspect a change, trace affected paths, and describe potential problems. A good review request defines the comparison, the properties that matter, and the level of evidence required for a finding.

Define the review surface

Name the branch, commit, pull request, or working-tree change you want reviewed. Add the context that the diff cannot show, such as a compatibility promise or a production incident the change is meant to prevent.

  • Specify the exact change to compare.
  • Call out security or data-integrity properties.
  • Identify supported environments and versions.
  • Ask for file and line references for every finding.

Separate evidence from speculation

Ask Codex to trace each candidate issue through the code path and to discard findings that depend on impossible states. Severity should follow the real impact and likelihood, not the vocabulary of the bug pattern.

Turn findings into decisions

Read each finding against the code, reproduce the behavior when practical, and decide whether the suggested fix protects the existing contract. After changes, rerun the focused checks and review the final diff.

  • Can the triggering input reach this code?
  • Does a guard already prevent the outcome?
  • Would the fix introduce a compatibility break?
  • Is the regression test tied to observable behavior?

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  1. Learning context added

    Added prerequisites, a suggested practice estimate, expected output, and connected definitions. The article procedure was not independently re-evaluated in this change.

    What to do: Use the opening checklist to prepare. No software update is required for this editorial change.

This log starts with the first recorded review; it is not a reconstruction of earlier revisions.

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