An exploratory project built after the YAML-driven UI platform work — a proof that Juris works as a standalone reactive runtime for a real app, not just as the engine behind a YAML spec. Built collaboratively with Claude Code.
Implements the same Sudoku puzzle from the framework comparison suite, but written directly in Juris rather than via a YAML spec or a component framework. No Tailwind CSS — styling is handled directly, which distinguishes it visually from the framework suite apps.
The key question it answered: can Juris drive a non-trivial interactive app on its own? Yes.
Also used as one of the live app integrations in vercel-apps.py — the MCP server that enables an LLM to observe and interact with running apps via state and actions. The Juris runtime's direct state model makes it particularly well-suited for this.
See research-yaml-platform for the broader YAML platform context. See research-vercel-apps for the action–state experiment it supports.