Differentiation and framework adapters

Eqiora differentiates an accepted implicit relation through primal, JVP, and VJP contracts. Python receives an opaque DifferentiableProgram bound to exact Model, Realization, input Parameter, and output Field identities.

The first alpha verifies one host-CPU rank-one float64 scalar-elliptic path. The optional PyTorch adapter uses the accepted VJP in first-order backward; the optional JAX adapter uses typed native CPU FFI for primal, JVP, and VJP. Base import eqiora imports neither framework, and no device transfer is hidden.

Read the maintained differentiation contract for exact versions, examples, transformations, and explicit nonclaims.