Holon's harness is the runtime control system that governs every model interaction. It is not a prompt library, not a multi-agent framework, and not a provider abstraction layer. It is the product boundary between human intent and verified outcomes.
Holon plugin packages are the intended packaging abstraction for capability sources. The long-term direction is one Holon-governed install and import surface that can wrap portable skills, capabilities, docs, assets, and adapter hints without forcing users to start from MCP, CLI, or other implementation-lane details.
Holon separates tool enumeration, capability discovery, and guarded execution into distinct runtime surfaces.
This page defines the vocabulary shared by Elegy (contract substrate) and Holon (runtime authority). Every term has a precise owner and a boundary that must not be crossed.