Dendro React

Name: Dendro React
Author: RooneyTech

by RooneyTechversion 0.9.3i★ –iRuns on your computer

Registry nameio.github.RooneyTech/dendro-react

Install

Overview

Description from the maker (original English)

React codebase semantics for AI agents, with a VS Code visualizer you both share. Free, local.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Developer tools

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
The registry lists no key to fill in.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "dendro-react": {
      "command": "npx",
      "args": [
        "-y",
        "dendro-react-mcp"
      ]
    }
  }
}

Run this in your terminal

claude mcp add dendro-react -- npx -y dendro-react-mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "dendro-react": {
      "command": "npx",
      "args": [
        "-y",
        "dendro-react-mcp"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "dendro-react": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "dendro-react-mcp"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account RooneyTech, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Developer toolsi

More stars than 0% of the other 1386 servers in this category
Published to the registry more recently than 71% of the other 1386 servers in this category
Basic checks equal to or better than 100% of the other 1386 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Dendro React safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.9.3) reached the registry 20 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: GitHub, Desktop Commander, Cloudflare MCP

Alternatives

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Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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GitHub’s official server lets AI read and manage code, issues and pull requests in your account. Use GitHub’s hosted version or run it locally with Docker.

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

Dendro

Your agent is editing code it's never read.

It just scanned forty files to answer "what breaks if I change this?" It could have asked one fucking question.

Dendro is one model of your React or React Native codebase, rendered twice: semantics your agent can query, and a map you can both point at.

For your agent — the semantics

MCP tools that answer React questions in React terms: the component's contract before an edit (props, state, contexts, blast radius), rerender risk with the why, effect hygiene (cleanup risks, setter-only effects, fetch races that exhaustive-deps can't see), navigation graphs (Next.js, React Navigation, Remix, Expo Router), live runtime state from a running app — and whole-repo orientation in one ~300-token call.

Symbol servers tell your agent where the symbol is. Dendro tells it what rerenders, and why.

For you — the visualizer

Your app's constellation: a live dendrogram in VS Code, descended from Reactive. Your agent drives it — highlights what it's talking about, annotates, traces a prop, walks you through the architecture step by step while you click Next/Back. You watch the same map the agent reasons over.

Getting Started

Install Dendro React — run ext install RooneyTech.dendro-react in VS Code, or install from the Marketplace
Open your React or React Native project in Claude Code
Paste this:

Set up Dendro React for this project. The extension is already installed in VS Code. Do these steps in order:

1. Find the MCP server path: ls ~/.vscode/extensions/rooneytech.dendro-react-*/dist/mcp-server.js. If several versions are installed, choose the newest one.

2. Find the absolute node path: which node (Node 22.12+ or Node 20.19+ in the 20.x line).

3. Merge a dendro-react server into .mcp.json using the absolute node path as "command", the selected server path as the first arg, and DENDRO_WORKSPACE_ROOT set to this project's absolute path. Preserve other servers.

4. Restart the MCP client, then call get_usage_guide and report its running version. If the tools are unavailable, stop and explain what setup remains.

5. Get the contract of one component I am about to edit. Read its source and one reported importer; check props, state, and used-by claims. Explain one concrete change impact and any mismatch before proposing an edit.

Your first useful result is a source-checked answer to “what depends on the component I'm changing?” The finish line is an accurate explanation of one change impact, with file references and scope limits.

For standalone analysis, Cursor/Windsurf setup, or troubleshooting, use the setup guide. The VS Code extension is needed for the shared map; static analysis can run through the npm MCP server alone.

Things to Try

Say "Dendro" in your prompts — like "Use Dendro to show me how this app is structured." It'll use the visualizer and deeper analysis instead of just reading files.

Watch: "Open the Dendro visualizer and walk me through the app"
Ask: "Use Dendro to check how healthy this codebase is"
Before an edit: "Get the component contract for CheckoutForm first"
"Where does state live? Use Dendro to trace the data flow"
"Show me how navigation works in this app with Dendro"
"Use Dendro to explain this repo's architecture like I've never seen it"

What It Does

Component contracts — props, state, contexts, blast radius, complexity in one call, before your agent edits
Health audits — A-F grade plus line-anchored review signals (cleanup risks, possible fetch races, informational setter-only effects)
Complexity scoring — every component graded, refactoring candidates named
Navigation mapping — React Navigation, Next.js, React Router, Remix, Expo Router
Context & data flow — providers, consumers, prop drilling detection
Visual canvas — the agent highlights, annotates, and traces flows in a live dendrogram
Runtime inspection — connect to a running app for live state, props, and hooks (optional)

Check findings before changing code

Static analysis suggests places to inspect. A health grade is a heuristic, not a correctness or performance verdict. The tree follows static imports; lazy imports and other entry points can be absent. Reported re-render risks need context about memoization and runtime behavior.

Read the flagged source before applying a fix. In particular, an effect can return cleanup implicitly or through an optional chain; v0.9.0 can incorrectly flag these as leaks. Check the running server version rather than assuming a changelog entry means a fix is installed. Visualizer commands being queued does not confirm that the requested nodes appeared on screen.

Free & local

Every tool is free — exports, snapshots, verified projection, live introspection, and batch analysis included. No account, no license key, and no code leaves your machine. The one exception is submit_feedback, which sends a debrief to the maker only when you explicitly say yes.

Configuration

Setting	Default	Description
`dendro-react.autoStartRuntime`	`false`	Auto-connect to React Native apps on activation
`dendro-react.runtimePlatform`	`auto`	Target platform: `auto`, `ios`, `android`, or `device`
`dendro-react.runtimePort`	`8097`	DevTools WebSocket port
`dendro-react.runtimeHost`	`localhost`	WebSocket host (`0.0.0.0` for physical devices)
`dendro-react.projectorMode`	`false`	Larger fonts/strokes for screen sharing

Learn More

Setup Guide — manual setup, Cursor/Windsurf config, runtime connection, troubleshooting
Tools Reference — every MCP tool with descriptions

Feedback

Dendro is in early access. If something doesn't work, feels confusing, or you wish it did something different — I want to hear it.

Issues & ideas: GitHub Issues
Email: colin@rooneytech.com
Or just tell your agent to use submit_feedback — it knows what to do.

*Built by Colin Rooney. Originally derived from Reactive, built at OSLabs with Micah Ziegler and Susana Lam. Named after the Greek word for tree and the branching dendrites of neurons.*

Dendro React

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Developer toolsi

Common questions

Alternatives

GitHub

Desktop Commander

Cloudflare MCP

README from the maker

Dendro

For your agent — the semantics

For you — the visualizer

Getting Started

Things to Try

What It Does

Check findings before changing code

Free & local

Configuration

Learn More

Feedback