Volume VII — Cognitive ABI

Volume VII defines the stable semantic waist of the DCN. It allows Kline, the DCN Runtime, experts, artifacts, compilers, evaluators, Actum Compute, Actum, MCP, A2A, Agent Plugins, and future transports to interoperate without sharing implementation internals.

The ABI is executable: canonical schemas, Rust/TypeScript/Swift bindings, golden traces, and conformance fixtures live alongside the prose specification.

The central invariant is:

Implementation, provider, transport, and execution environment may change while the semantic cognitive contract remains stable.