What should be in a default object-first world for AI agents?

mikrokhoros is an open source AI agent harness for object-first worlds. Every capability an agent can invoke is a concrete object with declared functions, identity, state, location, authority, and history. The runtime enforces locality, possession, permissions, bounded actions, and replayable trajectories.

The current default khoros includes Athena, an Objective Board, a Library, a Warehouse, and a Marketplace.

If you build agent harnesses, simulations, games, or evaluation environments: which objects and rules should exist on day one?