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devlensOSS

devlensOSS

MCP.Pizza Chef: devlensio

DevLensOSS transforms your JavaScript, ReactJS, NextJS, and NodeJS codebases into interactive, AI-powered graphs. It summarizes functions, components, and routes with technical and security insights, enabling faster pull request reviews, easier onboarding, and deeper architectural understanding. It works with AI clients like Claude Desktop and Cursor, requiring minimal setup by installing via npx and adding a small config snippet. No API keys or accounts are needed, making it accessible for developers and teams.

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Use This MCP server To

Visualize my JavaScript or React codebase architecture Get AI-generated summaries of functions and components Review pull requests faster with clear code insights Understand security risks in my codebase Help new developers onboard quickly Query code relationships like function calls and imports

README

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DevLens

Intelligent codebase visualizer.

Turn any TypeScript, JavaScript, Python, Go, Rust, or Java repository into a living, queryable graph — every node carries a functional summary, a technical summary, and a security assessment.

License: AGPL v3 npm: @devlensio/cli npm: @devlensio/skill Built with Bun

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DevLens Demo

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Table of Contents

What is DevLens?

DevLens turns a codebase into a pre-built dependency graph. Instead of reading files one at a time, you (or your AI agent) query the graph: every component, class, function, route, struct, or trait is a node, and every connection is a typed edge (CALLS, IMPORTS, HANDLES, IMPLEMENTS, …). Each node carries:

  • Functional summary — what business purpose does this serve?
  • Technical summary — how does it work?
  • Security assessment — severity + explanation

This is the difference between an AI that re-reads your whole repo every session and an AI that already knows the architecture — architecture reviews, impact analysis, security audits, and onboarding take seconds, not hours.

devlensOSS FAQ

Can I use this to understand and review JavaScript and React codebases?
Yes — devlensOSS visualizes and summarizes JavaScript, ReactJS, NextJS, and NodeJS projects to help with code reviews and onboarding.
Can I use this with Claude Desktop or Cursor?
Yes — devlensOSS works as a server that these MCP-compatible AI clients can connect to for codebase insights.
Do I need an API key or account to use devlensOSS?
No — it runs locally and does not require an API key or external account.
How hard is it to set up devlensOSS?
Setup is simple — you install it with a single command and add a small config snippet to your AI client.
Does devlensOSS support languages other than JavaScript?
Yes — it also supports TypeScript, Python, Go, Rust, and Java, but the primary focus here is JavaScript and related frameworks.
Can I use devlensOSS to speed up onboarding new developers?
Yes — it provides clear architectural summaries and visualizations to help new team members understand the codebase quickly.