Kol for developersBuild AI companions people talk to

Write a persona, add what it knows, test it in text, and publish it to the Kol marketplace, from your terminal or from your coding agent.

Quickstart

What is Kol?

GitHub

Files, not forms

Your AI is a folder: kol.json, a persona in Markdown, knowledge files and tests. Keep it in git and review changes like code.

Test before anyone hears it

See the exact instructions it gets, talk to it in text, and run scripted conversations with checks, all before you save.

Made for coding agents

Every command speaks JSON, and the built-in MCP server gives Claude Code, Codex and Cursor the same tools. Say "build me a cooking companion and publish it".

Nothing to host

You describe the AI; Kol runs it, answers the calls and keeps the numbers. You approve your sign-in on your phone.