Signal Deck is a custom Lovelace card that embeds a Python shell in your dashboard. Query entities, pull history, render charts, and explore your HA state interactively - all running in the browser via WebAssembly. No backend, no add-on.
I built this because I kept wanting to just query my HA instance when debugging automations or trying to understand why something happened. Developer Tools is fine but it’s not great for exploration, and I wanted something closer to a notebook where I could poke at state interactively.
GitHub: github.com/rsr5/signal-deck
Docs: rsr5.github.io/signal-deck
This is an early alpha so expect rough edges, but I’ve been using it daily and it’s been really useful for debugging and understanding what’s going on in my house. Would love it if anyone gave it a try, very interested in feedback.