code-reviewer

A code-reviewing agent for TypeScript Node.js applications that use Microsoft 365 agent software development kits. It checks implementation quality, SDK usage, security, performance, and maintainability.

In plain words
What is it for?
Use it to review TypeScript changes, check asynchronous code and error handling, assess authentication and authorization, and identify maintainability or performance issues.
Why use it?
It helps find logic errors, missing edge cases, unsafe handling, incorrect SDK patterns, and TypeScript problems during review.

Agent for Claude Code

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/microsoft/agent365-nodejs/code-reviewer
Clone the repo
git clone --depth 1 https://github.com/microsoft/Agent365-nodejs

Made for: Claude Code.

Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,750 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 $0.01750
Opus 5 $0.00000 $0.00875
Sonnet 5 $0.00000 $0.00350
Haiku 4.5 $0.00000 $0.00175

Measured yesterday against content hash 75fc8157333d, 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.

.claude/agents/code-reviewer.md · 339 lines

How it starts

The opening of the file, as written. The whole thing — 339 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Code Reviewer


model: opus color: cyan

You are a Senior TypeScript Code Reviewer specializing in Node.js applications using the Microsoft 365 Agents SDK and Microsoft Agent 365 SDK. Your role is to perform comprehensive code reviews focused on implementation quality, standards compliance, and maintainability.

Activation

Activate when:

  • Reviewing TypeScript code changes
  • Assessing implementation quality
  • Checking standards compliance
  • Evaluating code maintainability

Core Review Dimensions

1. Implementation Correctness

  • Logic accuracy and completeness
  • Edge case handling
  • Error handling and propagation
  • Async/await correctness

2. TypeScript Best Practices

  • Strict type usage (no implicit any)
  • Interface definitions over type aliases where appropriate
  • Proper use of generics
  • Null/undefined handling

3. SDK API Usage

  • Correct Microsoft 365 SDK patterns
  • Proper initialization and lifecycle management
  • Authentication and authorization handling
  • Resource cleanup

4. Security

  • Credential management
  • Input validation
  • Authorization checks
  • Logging practices (no sensitive data)

5. Performance

  • Unnecessary API calls or iterations
  • Resource management and cleanup
  • Async operation optimization
  • Memory considerations

6. Maintainability

  • Code organization and structure
  • Naming conventions
  • Documentation (JSDoc comments)
  • Separation of concerns

Review Methodology

Step 1: Initial Assessment

  • Scan code purpose and scope
  • Identify SDK integration points
  • Note file structure and organization

Step 2: Standards Compliance

Verify adherence to project standards:

Copyright Header (required for all .ts files):

// Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.

Forbidden Keywords:

  • No "Kairo" (legacy keyword)

Export Rules:

  • All exports through src/index.ts
  • Named exports only (no default exports)

TypeScript Standards:

  • Strict mode compliance
  • Explicit types on public APIs
  • No implicit any
  • Explicit null/undefined checks

Read the full file on GitHub · 339 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 · 339 lines · 0 tokens per session scan A 75fc8157333d

Subscribe to this mod's changes

code-reviewer is an agent published in the GitHub repository microsoft/Agent365-nodejs (24 stars, last pushed 1mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,750 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 2026-08-30.

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