# $comment
This Draft 2020-12 schema closes and validates the portable JSON structure. JSON Schema cannot recompute the semantic digest, resolve references across collections, compare evidence dates across fields, prove typed graph paths, or authenticate scientific and regulatory sources. Use bin/ritonavir-mechanism.ts verify for those runtime checks; neither layer grants medical, experimental, manufacturing, GMP, regulatory, or action authority.

# description
A digest-pinned, source-bound, read-only map that keeps chemical identity, solid-state polymorphism, dissolution, pharmacological mechanisms, and clinical decisions on non-equivalent planes.