KohakuTerrarium

KohakuTerrarium's core abstraction is the "creature," a standalone agent with its own controller, tools, sub-agents, triggers, memory and I/O; creatures are hosted by a "Terrarium" engine, a graph runtime that owns channels, lifecycle, output wiring, hot-plug and topology. Installing it and running kt install @kt-biome followed by kt run @kt-biome/creatures/swe --mode cli opens an interactive shell with a complete coding agent: file tools, shell access, web search, sub-agents and resumable sessions.

The same agent can be driven as a four-line Python library call instead of a CLI session, for batch jobs, bots or pipelines. The project frames itself as useful when a new agent shape is needed and rebuilding the underlying substrate, controller loop, tool dispatch, triggers, sub-agents, sessions and persistence, from scratch is not worthwhile, since existing agent products such as Claude Code, Codex, Gemini CLI, OpenCode and OpenClaw each reimplement that substrate independently.

It is not meant to replace an already-fitting agent product for stable needs, and is aimed at users who want to customize an agent's shape, drive agents from their own Python, or whose requirements are still evolving.