N3MO — Automated PR Review & Code Impact Analysis Tool

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15-Day Free Trial Available

Automated PR Review — Know What Breaks Before You Push

N3MO is a code review automation tool that parses your repository's ASTs and builds a call graph to trace the<br>transitive blast radius of any pull request change instantly.

Benchmark: Indexed TensorFlow in 14.06 minutes (14,611<br>files, 79,523 symbols, 480,851 edges)

Get Started for Free<br>Star on GitHub

Quick Install

$ pip install n3mo

n3mo interactive playground

Query Symbol

auth_user<br>db_pool<br>validate_jwt

Blast Radius Info

Affected Files:

Transitive Callers:

Severity:<br>High Impact

auth_user

login

refresh

validate

POST /login

admin_login

require_auth

Powerful Features for Automated Code Review

Stop guessing what your pull requests will break. N3MO builds a relational knowledge graph of<br>your codebase to empower engineering teams with precise impact analysis.

Transitive Blast Radius

Traces call links recursively to arbitrary depth, showing you direct and indirect downstream<br>impacts of any refactor or deletion. Find hidden dependencies that standard search tools<br>miss.

Root: auth.py<br>Transitive Depth: 5<br>DB Resolution: Scope-Aware

SELECT symbol, file_path FROM callers WHERE<br>target = 'db_pool';

> Found 12 matching transitive callers across 4<br>service layers.

27 Languages*

Powered by GitHub's Tree-sitter. We parse Python, TS/JS, Java, Go, Rust, C++, Ruby, PHP, and<br>more locally.

*Tree-sitter parsing supported for<br>27 languages. Deep semantic call graph mapping currently optimized for Python, JS/TS,<br>and Java.

Python<br>TypeScript<br>Java

Native MCP Server

Integrate N3MO directly into Cursor, Claude Desktop, or Windsurf. Allow AI agents to trace<br>structures without hallucinations.

Model Context Protocol Active

GitHub Webhook

Enforce codebase size-aware checkpoints on every Pull Request, posting a comprehensive impact<br>markdown report directly to PR comments in under 2 seconds.

github-actions bot<br>commented on PR #124

◈ N3MO Impact Check: PASSED

• Modifying auth_user affects 3 downstream components.

• Transitive blast radius: High Impact (8 caller nodes).

Who is N3MO Built For?

A concise breakdown of our ideal user profiles.

Staff Engineers

Architects managing large, legacy<br>monoliths who need a reliable way to map sprawling dependencies before initiating major<br>refactors.

Code Reviewers

Senior developers acting as<br>gatekeepers on PRs who want automated, mathematically-proven impact analysis instead of<br>relying entirely on unit tests.

AI Code<br>Agents

Autonomous coding bots like Claude and<br>Cursor that require a precise, deterministic knowledge graph to avoid hallucinating file<br>structures.

How It Works: A Practical Scenario

Step-by-step instructions on catching breaking changes.

01

Install the GitHub Webhook

Navigate to your repository settings<br>and grant N3MO read access to your source code. You don't need to configure CI/CD pipelines<br>or write custom workflows.

02

Open a Pull Request

A junior developer opens a PR<br>modifying a seemingly isolated utility function, `format_date()`. Unbeknownst to them, this<br>function is indirectly used by the core billing service.

03

Review the Impact Report

Within 2 seconds, N3MO intercepts the<br>webhook, parses the entire AST, and posts a comment on the PR detailing the exact downstream<br>services that depend on `format_date()`. You catch the breaking change before it hits<br>production.

Native MCP Server Integration

Give AI agents like Cursor and Claude deterministic structural context instead<br>of random file chunks.

Claude Desktop

Automatically configure N3MO as an MCP tool for Claude to map<br>blast radius before it writes code.

$ cd /path/to/project<br>$ n3mo mcp install

Cursor IDE

Add N3MO directly to Cursor settings to enable instant<br>transitive impact queries during refactoring.

Go to Settings -> Models -> MCP

Type: command

Command: n3mo mcp start

Plans & Pricing

Scale N3MO's PR impact check capabilities dynamically to fit the size of your<br>team's codebases.

No seat-based pricing.<br>Ever.

N3MO prices by<br>repositories, not users, so your entire engineering team can collaborate without buying additional<br>licenses. Each repository receives continuous indexing, dependency analysis, PR impact detection,<br>and code intelligence. Start free with local MCP — upgrade only when you want automated PR checks<br>across your team.

Standard Plan

$19/month

For solo devs and small projects

Up to 1 repo

30,000 LOC per repo

30,000* max total LOC

Real-time PR Impact Analysis

Interactive Dependency Graph

Community support

Buy Standard

Popular

Pro Plan

$69/month

For small teams (2–5 devs)

Includes 15-Day Free Trial

Up to 3 repos

100,000 LOC per repo

300,000* max total LOC

Everything in Standard Plan

Multi-repo dashboard

Email & community support

Buy Pro

Team Basic

$199/month

For growing teams (6–20 devs)

Up to 5 repos

200,000 LOC per repo

1,000,000* max total LOC

Everything in Pro

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