Subagent

Code Reviewer by nyldn

Code reviewer. Delegate only when the user explicitly starts an Octopus workflow.

Type: Subagent
Repository: nyldn/claude-octopus
GitHub stars: 4.1k
License: MIT
Repo last updated: Sep 26, 2026
Source file: .claude/agents/code-reviewer.md
Model: opus

What Code Reviewer by nyldn is

Code Reviewer by nyldn is a subagent published in the nyldn/claude-octopus repository on GitHub, which has about 4.1k stars. The repository describes itself as: “Run multiple AI models against the same research, design, or coding task. Surface disagreements before you ship.”

A subagent is a specialist assistant that Claude can hand part of a task to. It is a markdown file whose frontmatter sets a name, a description that tells Claude when to delegate, and optionally the tools and model it may use; the body becomes the subagent's own system prompt.

Because a subagent works in its own context, it keeps the main conversation focused: Claude can send a narrow job, such as a review or a specialised analysis, to Code Reviewer and get back a compact result.

How to install Code Reviewer by nyldn

Claude Code

Download code-reviewer.md from the repository.
Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control.
Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.

Claude Cowork

Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent.
Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.

New to extending Cowork? Our plugins guide and Customize guide explain how skills, plugins, and connectors fit together.

Inside the source file

An excerpt from .claude/agents/code-reviewer.md, shared under the repository's MIT license. Read the full file on GitHub.

You are an elite code review expert specializing in modern code analysis, security, performance, and maintainability.

Core Expertise

Code Quality: Clean Code principles, SOLID patterns, code smell detection
Security Review: OWASP Top 10, input validation, auth implementation
Performance: N+1 detection, memory leaks, caching strategy review
Configuration: Production configs, Kubernetes manifests, CI/CD pipelines
Testing: TDD adherence, coverage analysis, contract testing

Behavioral Traits

Maintains constructive, educational tone in all feedback
Prioritizes security and production reliability above all
Provides specific, actionable feedback with code examples
Balances thorough analysis with development velocity
Considers long-term technical debt implications

Response Approach

Analyze code context and identify review scope
Apply automated analysis for vulnerabilities
Conduct manual review for logic and architecture
Assess security and performance implications
Provide structured feedback organized by severity
Suggest improvements with specific code examples

Output Contract

Return status: COMPLETE | BLOCKED | PARTIAL

COMPLETE

Findings (mandatory, with severity: Critical/High/Medium/Low)
Security Issues
Performance Concerns
Recommendations

BLOCKED

Blocker Description
What Was Attempted

PARTIAL

Completed Sections
Remaining Work
Confidence: [0-100]

Before you install

Read the whole file first. Skills, commands, and subagents are instructions Claude will follow, so make sure they match what you want.
Check which tools, scripts, or MCP servers it uses. Local servers and scripts run with your permissions.
Try it in a test project or a copy of your files before pointing it at real work.
Pin the version you tested, and review changes before updating.
Watch for instructions that fetch web content or run shell commands; those are where prompt injection risks start. See our prompt injection guide.

FAQ

What is Code Reviewer by nyldn?

Code Reviewer by nyldn is a subagent for Claude Code and Claude Cowork from the nyldn/claude-octopus repository on GitHub. Code reviewer. Delegate only when the user explicitly starts an Octopus workflow.

How do I install Code Reviewer by nyldn in Claude Code?

Download code-reviewer.md from the repository. Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control. Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.

Can I use Code Reviewer by nyldn in Claude Cowork?

Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent. Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.

Is Code Reviewer by nyldn safe to install?

It is a third-party community resource, not reviewed by Anthropic or this site. Read the source file first, check which tools and connectors it uses, and install only from sources you trust.

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Listing data comes from the public GitHub repository and was last checked in September 2026. Excerpts are © their authors and shared under MIT. This directory is independent and not affiliated with Anthropic or the resource's authors.