ContractSpec docs
OSS-first docs
These docs teach the open system first: contracts, generated surfaces, runtimes, governance, and incremental adoption. Studio shows up as the operating layer on top, not as the source of truth.
Executes a governed relational read over the portable database context. The root resource selects its allowlisted columns and each declared relation is projected as a nested children array via a fail-closed parent→child join. Mirrors the provider-database `GovernedRelationalReadDescriptor` builder (eq-only filters, identifier allowlisting). Additive to `database.query.readonly`; it never mutates state and returns a `QueryResultEnvelope`-shaped result.