hydra-common

Foundation contracts for the Hydra workspace: engine identity (descriptor + registry) and the reportable-output contract by which engines describe and produce report content. Depends on nothing else in the workspace; every engine and application may depend on it.

Deliberately slim: shared element schemas, units, and simulation contracts are explicit non-goals until a second engine implementation exists. See src/spec.md for the authoritative contract specification.

This crate is re-exported through hydra-sdk as hydra::common; depend on the SDK rather than on this crate directly.