Diff, the code review Grok Bot
Code review Grok Bot template. Reviews a diff the way a senior engineer would: ranked by what breaks in production, each finding with the input that fails and the fix, not a style lecture.
About this engineering Grok Bot template
Diff is the code review Grok Bot that ranks by blast radius. Data loss and corruption first, then security, then correctness, then how the code fails when the network times out or the queue fills, then performance where it will actually bite, then tests, and naming last, said once.
Every finding carries the file, the line, the concrete case that breaks it, and the fix as code. Not consider adding validation, but this crashes when the list is empty, with the patch. It reads the whole diff before saying anything, because a line that looks wrong is often handled six files later, and it says when a change is fine, because a review that always finds something teaches people to ignore reviews. It also refuses to rewrite your approach on taste, and will tell you when a diff is too large to review properly and where it would cut it.
Use Diff on anything touching money, auth, migrations or data, and on any diff large enough that a human reviewer will skim it. Repro is the Grok Bot for turning a vague complaint into a reproduction, Probe for the test plan that stops it recurring, and Page for what customers read when something gets through anyway. Diff will also say when a change is fine, which is what makes the times it says otherwise worth reading.
Mentioned above: Repro Bug Bot, Probe QA Bot, Page Incident Bot. Or see every Engineering Grok Bot.
What to ask it
- Review this diff and tell me what blocks the merge.
- Is there anything here that can lose data on a retry?
- This PR touches auth. What would you check first?
- What is missing a test that could actually fail?
- Is this diff too big to review properly? Where would you split it?
How to install this Grok Bot template
- Copy the template. You get the name, the description and the instructions.
- In Grok Bot, choose New, then Create new agent.
- Open Bot actions, then Edit Profile, and paste the name and the description.
- Paste the instructions.
- Switch on Web browsing. It needs no routines.
Or skip all five: add Diff Code Review Bot to Grok Bot in one click, using Grok Bot's own share as template link.
Questions about this Grok Bot
How is this different from asking Grok to review my code?
The ranking and the evidence. A general chat returns a flat list where a style note sits next to a race condition. Diff orders by what breaks in production and gives the failing input and the fix for each.
Will it rewrite my code the way it would have written it?
No. It comments on your approach only when the approach causes data loss, a security hole, a correctness bug or an unrecoverable failure.
Does it comment on formatting?
No. Anything a linter handles is out of scope, and naming is one short note at the end if it matters at all.
Can this code review Grok Bot read a pull request from a URL?
Yes, it runs on web browsing, so a link to the pull request or the raw diff is enough. It reads the whole change before commenting, because a line that looks wrong is often handled six files later.
Design templates for your tool
Diff Code Review Bot works alongside the vibe coding tool you already build in, and the same licence covers the design templates for it: Lovable templates, Bolt templates, Replit templates, Claude Code templates, ChatGPT Codex templates, Cursor templates, Windsurf templates, Framer templates, v0 templates and Cline templates.
Included in the BrowserMoon licence, alongside every design template and all 51 Grok Bot templates. One licence, unlimited projects, including work you sell.
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