Practical PR Review for Coding Agents

Where this fits

You've been on a feature branch for days, and now the PR is up. Your human reviewers are busy, and you'd rather catch obvious defects before they look. Or you're an agent orchestrating a merge pipeline and need a quick, focused review of exactly what changed—not the whole repo. review-pr gives coding agents that ability by scoping the review to the diff between your branch and its base.

Why agents benefit

• Diff-scoped analysis – The skill explicitly targets git diff <base>...HEAD and uncommitted working-tree changes, so agents don't waste time on untouched code.
• Context-aware defect hunting – It checks new logic against edge inputs, error paths, and caller expectations, which is exactly what a human reviewer would do.
• Test coverage enforcement – The skill flags changed behavior that lacks tests for its edge cases, nudging agents to identify real coverage gaps, not just line counts.
• Documentation freshness check – It detects when the diff makes existing README or docs statements false, preventing stale documentation from shipping.
• Severity-tagged findings – It requires reporting every issue with severity levels, including minor and informational ones, so downstream triage is easy.

Practical scenarios

Pre-merge sanity check in CI

Agents can run review-pr as part of a CI step on every PR. The agent quickly produces a list of findings with severities, which maintainers can triage without deep-diving into the diff themselves.

Reviewing a colleague's branch on demand

When a developer asks "can you check my branch?" an agent executes the skill, reads the diff, and returns a structured critique covering correctness, tests, and docs—saving the developer from waiting for a busy human reviewer.

Cleaning up before a major release

Before merging a large release branch, an agent reviews the entire change surface against the base, catching inconsistencies that commonly slip through when many files are touched.

Add it to your agent workflow

Install the skill with:

npx skills add trailofbits/skills --skill review-pr

Then simply prompt your agent with something like:

Review the current branch against main.

The skill will run git diff (and git diff <base> if needed), inspect each hunk, check test coverage and doc accuracy, and return a severity-annotated list of findings.

Compare before adopting

Before adopting review-pr, compare it against alternatives by evaluating three things: quality signals (does it catch real bugs or just style nits?), maintenance freshness (is the skill actively updated and battle-tested by a reputable security firm like Trail of Bits?), and workflow fit (does it integrate with your agent's existing tool set—here it uses only Read, Grep, Glob, and Bash, so it's highly compatible). Also consider whether your agent already has a similar diff-review routine that you'd be duplicating.

Why it is worth tracking

This skill comes from Trail of Bits, a respected security research firm with 6,800+ GitHub stars on their skills repo—a strong quality signal. Its narrow scope and practical checklist make it immediately useful for any coding agent that handles PRs. Track it if you often need automated, diff-focused code review; the skill's simplicity means it's likely to remain stable and easy to extend. For more agent-skill recommendations, see OpenAgentSkill's directory.