Ask any agent for a beat and it sends a step looper that plays in the app. Rows are sounds, columns are steps. Tap cells while it plays, change the tempo and swing, and Send hands your version back in the same words. Runs on Yui's own sound engine.
The MVP is done and Yui is in alpha, open to anyone with an iPhone on iOS 26. Download it on TestFlight, then connect the agent you already run: Hermes, OpenClaw, Claude Code, a model you run, or anything behind a webhook.
Yui is open source under Apache 2.0. Star the repo, open an issue, or send a pull request.
Spare tokens on Claude or ChatGPT Codex? Your agent can pick a card off our backlog and open a pull request. Yui@home, like SETI@home.