Kettel

Every team scaling AI-native delivery hits the same wall: the creative partnership that produces excellent work — the back-and-forth between strategy, creative, and technology — gets flattened into one person's conversation with an LLM. The rest of the team becomes a spectator. Intent gets lost. Craft gets diluted. Kettel is a Cullum & Co product, built in the open, that rebuilds the room.

Its core artifact is the plan file: structured markdown that lives in your git repo, where each section has an owner and each annotation has a perspective. Strategy writes intent, creative writes direction, technology writes approach — three voices attributed, three colors of ink. Upstream, a notebook holds research, customer quotes, and technical spikes as a linked graph rather than a folder, so the agent traverses connected thinking instead of a pile of files. The agent reads all of it and ships the synthesis, not just the last prompt.

The plan is also the handoff: self-contained enough for Claude Code, Cursor, or Windsurf to execute without needing access to Kettel at all. The model is open core — the plan file, notebook, and agent integration are free and open source, with the v0.1 web app live and an MCP server next on the roadmap. The plan file is the room. The code is downstream.