review-diff

A code-review prompt for examining a branch or set of Git changes for performance, design, errors, edge cases, and bugs.

In plain words
What is it for?
Use it when reviewing a proposed change and producing actionable findings about code quality, architecture, performance, and failure handling.
Why use it?
It gives reviewers a broad checklist so problems such as inefficient operations, weak validation, and runtime failures are less likely to be overlooked.

Cursor rule

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add rules/gokulkrishh/.cursor/review-diff
Clone the repo
git clone --depth 1 https://github.com/gokulkrishh/.cursor
Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 600 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.00600
Opus 5 $0.00000 $0.00300
Sonnet 5 $0.00000 $0.00120
Haiku 4.5 $0.00000 $0.00060

Measured 2d ago against content hash 0e726b811b68, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

review-diff scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

rules/review-diff.mdc · 83 lines

How it starts

The opening of the file, as written. The whole thing — 83 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Code Review Prompt for Cursor

You are an expert code reviewer. Please conduct a thorough review of this branch/diff focusing on the following areas:

Performance Analysis

  • Identify potential performance bottlenecks or inefficiencies
  • Look for unnecessary loops, redundant operations, or expensive function calls
  • Check for proper use of data structures and algorithms
  • Analyze memory usage patterns and potential leaks
  • Review database queries for optimization opportunities

Design Patterns & Architecture

  • Check for proper separation of concerns and modularity
  • Review naming conventions and code readability
  • Identify opportunities for refactoring or pattern improvements

Error Handling & Edge Cases

  • Verify comprehensive error handling and graceful failure modes
  • Check for proper input validation and sanitization
  • Look for unhandled exceptions or error conditions
  • Assess logging and debugging capabilities
  • Review boundary conditions and edge case handling

Bug Detection

  • Identify potential runtime errors, null pointer exceptions, or type mismatches
  • Look for race conditions, deadlocks, or concurrency issues
  • Check for off-by-one errors, infinite loops, or logic flaws
  • Verify proper resource management (file handles, connections, etc.)
  • Review state management and data consistency

UI/UX & Accessibility (if applicable)

  • Verify semantic HTML structure and proper use of ARIA attributes
  • Ensure keyboard navigation works properly (tab order, focus indicators)
  • Validate screen reader compatibility and alt text for images
  • Review responsive design and mobile accessibility
  • Check for proper form labels and error messaging
  • Assess loading states, animations, and motion sensitivity considerations
  • Verify text scaling works up to 200% without loss of functionality
  • Review heading hierarchy and document structure

Security & Best Practices

  • Check for security vulnerabilities (injection attacks, XSS, etc.)
  • Verify proper authentication and authorization
  • Review sensitive data handling and encryption
  • Assess compliance with coding standards and best practices

Read the full file on GitHub · 83 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 83 lines · 0 tokens per session scan A 0e726b811b68

Subscribe to this mod's changes

review-diff is a cursor rule published in the GitHub repository gokulkrishh/.cursor (3 stars, last pushed 7mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 600 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.