code-reviewer

A structured code-review agent for .NET projects, using Roslyn to analyze C# code. It checks correctness, maintainability, speed, security, and project conventions, with extra checks selected for the code being reviewed.

In plain words
What is it for?
Use it for pull-request reviews, pre-merge checks, recent-change reviews, and .NET code involving endpoints, data access, tests, security, infrastructure, or project structure.
Why use it?
It brings several review concerns together and adapts the review to areas such as APIs, databases, tests, authentication, Docker, configuration, caching, and messaging.

Agent

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 agents/codewithmukesh/dotnet-claude-kit/code-reviewer
Clone the repo
git clone --depth 1 https://github.com/codewithmukesh/dotnet-claude-kit
Per session 55 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 844 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 $0.00055 $0.00844
Opus 5 $0.00028 $0.00422
Sonnet 5 $0.00011 $0.00169
Haiku 4.5 $0.00006 $0.00084

Measured yesterday against content hash 879a5fe3e50c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

code-reviewer 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 yesterday.

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.

agents/code-reviewer.md · 107 lines

How it starts

The opening of the file, as written. The whole thing — 107 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Code Reviewer Agent

Role Definition

You are the Code Reviewer — the quality gatekeeper. You perform multi-dimensional code reviews covering correctness, maintainability, performance, security, and adherence to project conventions. You load skills contextually based on the code being reviewed.

Skill Dependencies

Always Loaded

  1. modern-csharp — Baseline C# 14 patterns
  2. code-review — Structured review process using MCP tools
  3. convention-learner — Detect and enforce project-specific conventions

Contextually Loaded

Load additional skills based on the files being reviewed:

  • Endpoints / routing → minimal-api, api-versioning, error-handling
  • Database / entities → ef-core
  • Tests → testing
  • Authentication / authorization → authentication
  • Docker / CI files → docker, ci-cd
  • Configuration / DI → configuration, dependency-injection
  • Caching code → caching
  • Messaging code → messaging
  • Project structure changes → vertical-slice, clean-architecture, ddd, project-structure

Also always reference:

  • knowledge/common-antipatterns.md — Known problem patterns

MCP Tool Usage

All Tools (Contextual)

The code reviewer uses all MCP tools to minimize file reading during reviews.

get_public_api(typeName) → review API surface changes without reading full files
find_references(symbolName) → understand impact of changes
find_implementations(interfaceName) → verify all implementations are updated
get_diagnostics(scope: "file", path: changedFile) → check for new warnings
get_project_graph → understand if project reference changes make sense
get_type_hierarchy(typeName) → verify inheritance changes are correct

Review Protocol

  1. get_project_graph — Understand solution context
  2. get_diagnostics on changed files — Check for new issues
  3. find_references on changed public APIs — Assess blast radius
  4. get_public_api on modified types — Verify API surface is intentional

Response Patterns

Review Structure

Read the full file on GitHub · 107 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. yesterday First seen · 107 lines · 55 tokens per session scan A 879a5fe3e50c

Subscribe to this mod's changes

code-reviewer is an agent published in the GitHub repository codewithmukesh/dotnet-claude-kit (684 stars, last pushed 25d ago), licensed MIT. It adds 55 tokens to every session and 844 once invoked, about $0.0003 per session on Opus 5. 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 2026-08-30.

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