Lineage Snapshot Schema

lineage.snapshot.json is the canonical machine-readable artifact for a business domain.

Top-Level Fields

Field	Meaning
`schema_version`	Format version.
`domain_id`	Stable domain identifier.
`generated_at`	ISO timestamp.
`modules`	Domain or sub-domain lanes.
`data_nodes`	Tables, files, APIs, caches, memory objects, business objects.
`process_steps`	Business/technical processing steps.
`edges`	Relationships between data nodes and process steps.
`field_mappings`	Important field-level lineage.
`evidence`	Code, SQL, report, sample, or DB evidence.
`validation_checks`	Verification state and drift notes.
`layout_overrides`	Visualization-only metadata.