NgRx Signal Store Devtools
Inspect, diff, and export store state from inside your running app — no browser extension required.
Stellar Devtools
Developer tools that work for humans and AI coding assistants equally.
See it in action
Section titled “See it in action”Play along — the demo above runs against the live demo app. Open it in another tab and follow along.
“In practice, it shortens the gap between ‘what happened’ and ‘where is that implemented.’” — GPT-5
What’s in the video
Section titled “What’s in the video”State inspection
00:04— Opening the overlay00:28— Picking a store, watching state update live00:41— Reading a diff
HTTP & causality
01:02— Making a fetch request (Outbox)01:50— The causal link between HTTP response and state change
AI handoff
02:25— Copy for AI2:43— Handing the snapshot to an AI assistant
State Sanitization
Redact sensitive values before they reach the overlay, logs, or an AI assistant. Automatic for common fields; fully configurable for everything else.
AI-First Design
State snapshots, history, and diffs are structured for AI consumption, not just human reading.
The window.__stellarDevtools API is a stable contract.
In-Browser Overlay
Runs inside your app, not as a browser extension. Mount it with a single component tag; remove it without a trace.