Best Codex skills for code review: from pull request to evidence

A useful code review has several jobs: understand intent, inspect the change, identify material problems, run relevant checks, explain CI failures, document user-visible changes, and hand the result to another person. Separating these jobs makes each output easier to assess.

The collection combines a pull-request review skill, CI failure triage, release-note preparation, and the existing change-evidence handoff. Use them as a chain or select the one that matches the current bottleneck.

Start with repository instructions, the requested behavior, and the diff. Trace important changes into their callers or consumers. Report only actionable findings with a concrete failure mode, location, severity, and supporting evidence. Summarize when there are no findings rather than inventing style objections.

Use CI triage after collecting the failing job, command, relevant log region, and changed files. Separate a product regression from environment, dependency, timeout, or flaky-test evidence. Prefer the smallest local reproduction that preserves the failing conditions.

Release notes should describe behavior that changed for a reader, the trigger, and any required action. Derive them from the final diff and verified behavior. Exclude implementation details that do not alter use, and do not claim a fix if the corresponding verification is absent.

The handoff ties the chain together: before and after behavior, checks and results, affected routes or inputs, and remaining limitations. It distinguishes local completion from deployment and a passing targeted check from broader confidence.

Choose a small pull request with one known behavioral defect, one clean change, and a deliberately failing CI fixture. Compare the findings with a human review, then assess whether the release notes and handoff reflect only observed behavior.

• Browse the GitHub review collection
• Read the practical review checklist
• Follow issue to tested patch

Use pull-request review while the change is still easy to correct. Feed it the project instructions, intended behavior, and actual diff so findings can trace a trigger through the changed code. Use CI triage only after a job fails; its job is to find the first causal error and separate it from the later cascade. Draft release notes after the release boundary is stable, then use the change handoff to connect user-visible behavior to the checks that actually ran.

This ordering keeps four different decisions separate: whether the code is correct, why automation failed, what users need to know, and what evidence a reviewer can trust. Combining them into one broad prompt usually produces a long summary with weak accountability.

• Browse the GitHub Review Pack
• Read the practical code-review checklist

Test the review skill against a small change with one known defect and several harmless edits. Check whether it prioritizes the defect, gives a reproducible trigger, and avoids stylistic noise. For CI triage, use a log with a clear first failure and dependent errors. For release notes, compare every public claim with the commit or issue that supports it.

A clean result is also evidence. It should name the files and paths examined, relevant checks, and unavailable environments without inventing findings. Human review remains responsible for product tradeoffs, specialist security analysis, and production decisions beyond the exercised scope.