Data Contracts

Data contracts are the quickest way to judge whether a package really owns a concept or is just passing it through.

Package Surface

• canonical identifiers
• shared payload shapes and validation rules
• migration contracts that keep versions legible across package boundaries

First Proof Check

• src/bijux_proteomics_foundation/identity/identifiers.py and serialization/document_schema.py
• src/bijux_proteomics_foundation/serialization/ and compatibility/schema_migrations.py
• packages/bijux-proteomics-foundation/tests