`Statewright`: visual state machines to hard-limit agent tool scope

Instead of throwing bigger models and longer prompts at reliability, this narrows each step with deterministic state-machine guards. If you already use coding agents, this is a practical pattern worth stealing even if the tool itself is early.

• —Each state gates tool access, iteration count, and valid transitions, so planning, editing, and testing cannot blur together.
• —The reported sweet spot is 13B-20B models: small enough to be cheap, but large enough to stay coherent inside a constrained workflow.
• —The engine is written in Rust, with non-LLM orchestration enforcing guards by protocol rather than prompt discipline alone.
• —A plugin layer hooks into Claude Code via MCP, with Codex and Cursor support planned, which makes the design portable beyond one IDE.