Capabilities

Surface	Portable contract	Adapter responsibility
Schema	Typed nodes, relationships, identities, strict properties	Validate supported database values
Extraction	Schema-valid entities, relationships, and mentions	None
Ingestion	Chunk, extract, embed, and prepare document-scoped writes	Atomic replace/delete implementation
Retrieval	Vector/hybrid seeds, bounded traversal, explicit evidence	Index search and graph queries
Agent tools	Shared createGraphSearchTool()	Implement GraphContextRetriever
Exploration	Bounded overview and expansion result types	Implement GraphExplorer

Managed graphs implement GraphDocumentWriter and can receive ingestGraphText() or ingestGraphDocuments(). Existing graph registrations are read-only and cannot be passed to those helpers. The type system preserves that boundary.

Evidence is also capability-aware. A managed graph can hydrate { type: 'chunks', maxChunks } from Anvia-owned provenance. An existing graph accepts { type: 'none' } because it does not own those document and chunk records.

All graph operations expose explicit limits and an optional AbortSignal. Applications still own authorization, retry policy, source discovery, scheduling, and cross-system consistency.