Error Model

Failures in bijux-proteomics-foundation should help a reviewer tell whether the problem is local, upstream, downstream, or a boundary mismatch. Error handling that hides ownership makes the package harder to trust.

Error Rules

• shared failures should say the payload meaning is invalid, incomplete, or incompatible
• do not hide migration breakage inside permissive coercion
• do not encode downstream policy failures in the shared error model

First Proof Check

• package error types and failure paths
• tests that assert the intended failure class
• neighboring packages when a failure crosses a handoff seam