ADR-001: Taxonomy Columns Exist, Assignment Deferred

Status

Accepted

Context

Compendium schema includes taxonomy columns, but production indexing currently has no deterministic taxonomy assignment pass.

Decision

Keep taxonomy storage fields in schema now, while writing null taxonomy values during indexing until a deterministic assignment method is implemented and validated.

Rationale

• Preserves forward-compatible schema for downstream consumers.
• Avoids shipping unstable taxonomy heuristics as if they were canonical.
• Allows ecology/studio surfaces to consume taxonomy fields when available without schema churn.

Consequences

• Consumers must treat taxonomy fields as optional.
• Documentation must clearly separate current implementation from planned taxonomy pipeline.
• Future taxonomy rollout requires method/version provenance fields and reproducible assignment protocol.