Error Model

Failures in bijux-proteomics-lab 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

• separate invalid lab inputs from outcome-promotion conflicts and repository failures
• make missing prerequisites explicit instead of guessing assay readiness
• avoid hiding upstream recommendation ambiguity inside local lab errors

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