Error Model

Failures in bijux-proteomics-intelligence 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 inputs from policy conflicts and evaluator failures
• make explainability gaps visible instead of silently returning a recommendation
• do not mask evidence uncertainty as a scoring success

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