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Module Contracts (v1 Freeze)

Ingest -> Materialization

Input: schemas.Event
Output: canonical object mutations, object versions, and edges

Materialization -> Data Plane

Input: canonical objects
Output: retrieval projections (dense/sparse/filter attributes/graph refs)

Retrieval -> Graph/Tensor Assembly

Input: candidate object IDs
Output: constrained expansion seeds and evidence paths

Graph -> Response

Input: expanded nodes, edges, provenance, version boundaries
Output: schemas.QueryResponse

Event Backbone Contract

Every mutation enters WAL first and gets a logical sequence.
Workers consume from WAL as subscribers; no bypass writes.

Policy Contract

Policy updates must emit auditable decision logs.
Query path must apply minimum scope/visibility/TTL/quarantine filters.