# Dendro React

**Category:** 💻 Developer Tools  
**Repository:** https://github.com/RooneyTech/dendro-react  
**Views:** 0  
**Installs:** 0  
**Upvotes:** 0  
**Directory Page:** https://allmcps.com/mcp/dendro-react

## Description
React/React Native codebase analysis for AI agents — 56 free MCP tools, local-only.

## Claude Desktop Quick Installation
Heuristic fallback — verify the package name and runner against the repository README before running it. Uses `npx` (confidence: low):

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

## Documentation & README

# Dendro

[![VS Code Marketplace](https://img.shields.io/visual-studio-marketplace/v/RooneyTech.dendro-react?label=VS%20Code%20Marketplace)](https://marketplace.visualstudio.com/items?itemName=RooneyTech.dendro-react)
[![Installs](https://img.shields.io/visual-studio-marketplace/i/RooneyTech.dendro-react)](https://marketplace.visualstudio.com/items?itemName=RooneyTech.dendro-react)

**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 (leaked subscriptions, derived-state 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](https://github.com/oslabs-beta/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

1. Install **Dendro React** — run `ext install RooneyTech.dendro-react` in VS Code, or install from the [Marketplace](https://marketplace.visualstudio.com/items?itemName=RooneyTech.dendro-react)
2. Open your React or React Native project in Claude Code
3. 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`
> 2. Find the absolute node path: `which node`
> 3. Create `.mcp.json` in the project root using the absolute node path as `"command"` and the MCP server path as the first arg
> 4. Add a Dendro section to `CLAUDE.md` (create it if needed) with: the entry file path, `get_usage_guide` as first call, and a note to run viz commands sequentially
> 5. Verify by calling `get_usage_guide`

That's it. Your agent handles the rest.

## 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 with line-anchored findings and fixes (leaked listeners, fetch races, derived-state 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)

## 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](https://github.com/RooneyTech/dendro-react/blob/HEAD/docs/setup-guide.md) — manual setup, Cursor/Windsurf config, runtime connection, troubleshooting
- [Tools Reference](https://github.com/RooneyTech/dendro-react/blob/HEAD/docs/tools-reference.md) — 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](https://github.com/RooneyTech/dendro-react/issues)
- **Email:** colin@rooneytech.com
- Or just tell your agent to use `submit_feedback` — it knows what to do.

---

*Built by [Colin Rooney](https://github.com/12mv2). Originally derived from [Reactive](https://github.com/oslabs-beta/reactive), built at OSLabs with Micah Ziegler and Susana Lam. Named after the Greek word for tree and the branching dendrites of neurons.*