Get Started
Set up Limelight in your app and start debugging with real runtime context — on the client, the server, or both.Quick Start
Install the SDK and connect your React Native or React app in under 60
seconds.
Server-Side Setup
Add middleware to your Express, Next.js, or Node.js server to capture
incoming requests.
Two Ways to Use Limelight
MCP Server
AI-powered debugging — Give Cursor, Claude Code, or any MCP-compatible
editor direct access to your app’s runtime. Ask questions in natural language
and get answers backed by correlated runtime data. The AI calls 11 debugging
tools automatically.
Desktop App
Visual debugging workspace — Interactive timeline with network requests,
renders, state, console logs, and full-stack traces. Works locally with zero
sign-up. All data stays on your machine.
Core Features
Network Requests
Capture and inspect all HTTP requests with full headers, payloads, timing,
and GraphQL intelligence including complexity scoring.
Full-Stack Tracing
Automatically trace requests from client to server. See the complete request
lifecycle in one place.
Render Tracking
Find unnecessary re-renders automatically. Zero config, zero Babel plugins.
Detects render loops, unstable props, and cascades.
State Inspection
Debug Zustand and Redux stores in real-time. See state changes, diffs, and
action history.
Console Logs
Stream console logs in real-time with filtering, search, and stack traces.
Issue Detection
Automatic detection of N+1 queries, render loops, race conditions, retry
storms, and other runtime anti-patterns.
Why Limelight?
Runtime Context for AI
AI assistants can read your code but can’t see what happens at runtime.
Limelight bridges that gap with structured, pre-analyzed context.
Causal Analysis
Not just raw events — Limelight correlates them into causal chains and
detects anti-patterns automatically via the Debug IR engine.
Zero Config
One line of code. No wrappers, no Babel plugins, no Metro config. Just
works.
Privacy-First
All data stays local. Automatic redaction of sensitive headers. No
telemetry, no cloud dependency.
Full-Stack
Client-to-server request tracing and full-stack correlation — linked
automatically via trace IDs.
Framework Support
React, React Native, Node.js, Express, Next.js, Expo. Zustand and Redux
state tracking built in.
Learn More
How It Works
SDK capture, correlation engine, Debug IR, and how context reaches your AI.
Concepts
Debug IR, causal chains, and the correlation engine — the core ideas behind
Limelight.
MCP Tools & Workflows
All 11 MCP tools, example workflows, and what your AI sees when it debugs.
GitHub
The SDK is fully open source. Star us on GitHub!