# parallel-code-review

Runs four parallel read-only subagents to inspect a diff across security, speed, correctness, and readability. Built for vetting large or risky pull requests.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 530 installs · ★ 866
- Author: spencerpauly
- License: CC0-1.0 · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/spencerpauly/awesome-cursor-skills/tree/HEAD/resources/parallel-code-review/SKILL.md
- Updated: 2026-08-02
- HTML: https://affpapa.org/en/nevibecode/skills/parallel-code-review

## What it does

The skill divides diff review across four isolated subagents running with `subagent_type: "explore"` and `readonly: true`. Each subagent inspects changes through one specific lens: security vulnerabilities, performance bottlenecks, logical correctness, or maintainability. The main agent then deduplicates findings and orders them by severity and fix effort.

The read-only restriction prevents file access conflicts between subagents during analysis. For oversized pull requests, the skill advises splitting the diff by directory and running four reviewers per folder in waves. While this automation catches injection risks and off-by-one errors early, it does not replace formal compliance or security sign-offs.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add spencerpauly/awesome-cursor-skills --skill parallel-code-review -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/parallel-code-review/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/parallel-code-review/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add spencerpauly/awesome-cursor-skills --skill parallel-code-review -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/parallel-code-review/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add spencerpauly/awesome-cursor-skills --skill parallel-code-review -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/parallel-code-review/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install spencerpauly/awesome-cursor-skills parallel-code-review
```

2. **Manually: put the files in place**
- File: `.github/skills/parallel-code-review/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add spencerpauly/awesome-cursor-skills --skill parallel-code-review -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/spencerpauly/awesome-cursor-skills --path resources/parallel-code-review
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/parallel-code-review/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add spencerpauly/awesome-cursor-skills --skill parallel-code-review -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/spencerpauly/awesome-cursor-skills/tree/HEAD/resources/parallel-code-review/SKILL.md

## When to use it
- identify security flaws like SQL injection, exposed secrets, and authorization bugs
- catch performance issues such as N+1 queries and expensive loops
- spot logic errors, race conditions, and edge cases before merging
- synthesize multi-agent findings into a single prioritized action list

## Example prompts
- Run a parallel code review on origin/main...HEAD across four subagents
- Review this PR diff with parallel-code-review focusing on security and performance
- Split this large diff by directory and run four review agents on each folder

## Source text · SKILL.md · CC0-1.0

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BEGIN THIRD-PARTY FILE d49b7359c43b3b4b
````text
---
name: parallel-code-review
description: Run four parallel read-only subagents that each review the same diff from a different lens — security, performance, correctness, and readability — then merge findings into one report. Use before merging large or risky PRs.
user-invocable: true
---

# Parallel Code Review

Use Cursor’s **Task** tool to run **four** `explore` (read-only) subagents at once. Each subagent only reads code and produces findings for one dimension. The main agent merges results into a single prioritized review — something only a multi-agent setup does efficiently.

## When to use

- Large diffs or refactors where a single pass misses categories.
- Security-sensitive changes (auth, payments, parsing untrusted input).
- Performance-sensitive paths (hot loops, N+1 queries, bundle entry points).

## Workflow

### 1. Scope the change set

Prefer a concrete list of files for reviewers:

```bash
git diff --name-only origin/main...HEAD
```

Or paste the PR link and let the main agent list changed files from the branch.

### 2. Launch four parallel subagents

Send **one message** with **four** Task invocations, each `subagent_type: "explore"` and **readonly: true**, with prompts like:

**Security**

```
Read-only review: SECURITY

Changed files:
<list>

Focus: injection (SQL, shell, XSS), authZ/authN gaps, secrets in code, unsafe deserialization, path traversal, SSRF, IDOR, dependency CVEs mentioned in diff.

Output:
- Critical / High / Medium / Low findings
- File:line and short fix recommendation
- "No issues" if nothing material
```

**Performance**

```
Read-only review: PERFORMANCE

Changed files:
<list>

Focus: N+1 queries, missing indexes, accidental O(n²) loops, bundle size impact, unnecessary re-renders, sync I/O on hot paths, unbounded caches.

Output: same severity + location format as above.
```

**Correctness**

```
Read-only review: CORRECTNESS

Changed files:
<list>

Focus: logic bugs, off-by-one, wrong edge cases, race conditions, error handling gaps, breaking API changes, test gaps for new behavior.

Output: same format.
```

**Readability / maintainability**

```
Read-only review: READABILITY

Changed files:
<list>

Focus: naming, duplication, abstraction boundaries, file size, unclear control flow, missing types/docs where they would prevent bugs.

Output: same format; prefer suggestions over nitpicks.
```

### 3. Synthesize

The main agent should:

1. De-duplicate findings that appear in multiple dimensions (count once, worst severity).
2. Order by severity, then by fix cost.
3. Produce a short executive summary (5 bullets max) and a table or list of actionable items.

### 4. Optional — address findings
````
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