How to review Pull Requests with an AI agent

Pipe the PR diff into your agent and ask for a review focused on bugs and security, or connect the GitHub MCP server so it can read the PR itself. Claude Code uses claude -p, Codex uses codex exec, and Cursor's CLI uses agent -p. Treat it as a first pass, not the final approval.

Checked against official docs on Oct 26, 2026.

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Claude Code

gh pr diff 123 | claude -p "Review this diff for bugs, security issues and missing tests. List each with file and line."
Or add the GitHub MCP server and ask it to review PR 123

Codex

codex exec "review the changes on this branch against main for bugs and security issues"
Run it in CI on each PR if you want automatic first passes

Cursor

agent -p "review these changes for security issues" --output-format text
Or open the branch in Cursor and ask the agent to review the diff

Grok Bot

Connect GitHub to Grok Bot
Ask it to review a PR and draft comments
It shows the comments before posting them

Gotchas

Agents miss business logic they were never told about. Give it the ticket.
Do not paste secrets in a PR an agent will read.
Keep a human approver on main.

The loadout for this job

Tools: GitHub Copilot, Cursor
Skill: Claude TDD skill
Repo: GitHub MCP Server
Model: Claude Opus 5.5
Bot: Grok Bot
Full setup: Best AI coding agent

FAQ

Can AI review pull requests?

Yes. It catches many bugs and style issues but still needs a human for intent and design.

Which is best for code review?

All three work. Use the one your team already runs and give it the PR context.

Related how-tos

Sources

Commands change. Check the linked docs before you run anything. All how-to guides