Jev picks the next move. Jot runs the loop.
Jot is the first general-purpose System One agent for Jev. Jev chooses tools and arguments. Jot runs the loop: execute, put the real results back into context, ask Jev again until it can reply.
You see every tool call. Credentials stay on the server. Chats stay in this browser.
You → Jev chooses a tool → execute → tool result → Jev again → reply
You: Add 6 and 7, then multiply by 2.
calculate({ left: "6", operator: "add", right: "7" }) → 13
calculate({ left: "13", operator: "multiply", right: "2" }) → 26
Jot: 26
The calculator does the math. Jev only decides the calls.
Needs Node.js, a TypeSafe API key, and Apple Silicon with uv for local drafts.
npm install cp .env.example .env # set TYPESAFE_API_KEY npm run draft:serve # terminal 1 npm run dev # terminal 2
Open localhost:3000. Loopback only.
npm test && npm run build
packages/ui Chat UI and tool-call trace
packages/agent Provider-independent loop
packages/jev-core TypeSafe client and Jev text
server/ HTTP, Jev adapter, tools
UI talks to agent events. The loop does not import React or Jev. The server wires them.
TypeSafe / Jev · pi · Errand · FrequencyWords · jsRealB
Jot is independent and not affiliated with TypeSafe. Jev is the model name.