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Code Review

Community
owainlewis
code-review

Review code changes for bugs, security issues, performance problems, and style violations. Use when asked to review code, a PR, or recent changes.

Overview

Publisherowainlewis
Repositoryyoutube-tutorials
Skill namecode-review
Stars
408
Forks
83
Bundled files
Instructions only
LicenseMIT
Links
  • Markdown instructions

    A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.

  • Works with any LLM

    AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.

  • Self-contained

    Everything the model needs lives in the instructions — no extra files to sync.

  • Open source

    Published by owainlewis on GitHub. Read the source before you install it.

Installation

Install the Code Review AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

1

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

  1. Open the app and go to Plugins → Skills.
  2. Choose "Install from GitHub".
  3. Paste the skill folder URL below and confirm.
    https://github.com/owainlewis/youtube-tutorials/tree/main/tutorials/pi-coding-agent-guide/resources/04-skills/code-review
  4. Enable the skill in any chat where you want it available.
Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.
2

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills
git clone --depth 1 https://github.com/owainlewis/youtube-tutorials.git /tmp/youtube-tutorials
mkdir -p .claude/skills
cp -r /tmp/youtube-tutorials/tutorials/pi-coding-agent-guide/resources/04-skills/code-review .claude/skills/code-review
Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Code Review in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Code Review on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Code Review is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

  • Loaded only when it is needed

    The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.

  • Switch models mid-chat

    Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

Code Review

When reviewing code, follow this process:

Step 1: Understand the Change

Run git diff (or git diff --staged for staged changes) to see what changed. Read the modified files in full to understand the surrounding context.

Step 2: Check for Issues

Review each changed file for:

Correctness

  • Logic errors, off-by-one errors, race conditions
  • Missing null/undefined checks at system boundaries
  • Incorrect error handling (swallowed errors, wrong error types)

Security

  • SQL injection, XSS, command injection
  • Hardcoded secrets or credentials
  • Overly permissive file/network access

Performance

  • N+1 queries, unnecessary loops, large allocations
  • Missing indexes for new database queries
  • Blocking operations in async code

Maintainability

  • Unclear naming, overly complex logic
  • Dead code, unused imports
  • Missing types in TypeScript

Step 3: Report

Format your review as:

  1. Summary: One sentence on what the change does
  2. Issues: Specific problems with file paths and line numbers
  3. Suggestions: Optional improvements (clearly marked as optional)

Be direct. Don't pad with praise. Focus on things that matter.

Frequently asked questions

What does the Code Review AI skill do?

Review code changes for bugs, security issues, performance problems, and style violations. Use when asked to review code, a PR, or recent changes.

Why use Code Review on TypingMind?

Because you install it once and use it with any model. Code Review is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Code Review in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/owainlewis/youtube-tutorials/tree/main/tutorials/pi-coding-agent-guide/resources/04-skills/code-review. TypingMind reads its SKILL.md and installs it as a skill you can enable per chat.

Which AI models can use Code Review?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Code Review?

As many as you like. As long as a model supports skills, you can use Code Review with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Code Review AI skill free?

Yes. It is published on GitHub by owainlewis under the MIT license. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

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