Luther Platform Protobuf Contracts
Buf-managed Protocol Buffers published at github.com/luthersystems/protos (module buf.build/luthersystems/protos) that define API contracts and shared messages across the Luther Enterprise platform: the pdfserv.v1 PDFService gRPC service (rpc Generate), healthcheck.v1, common.v1 exceptions, a sensitive-field annotation, and 80 ConnectorHub connector configuration schemas (Salesforce, SAP S/4HANA, Stripe, Postgres, Kafka, DocuSign, Equifax, Anthropic Claude ...). The platform is customer-deployed (public cloud, private cloud or on-premise) and exposes business logic through the shiroclient JSON-RPC gateway and grpc-gateway-transcoded middleware, so no public base URL exists; the sandbox starter kit shows the pattern with a SandboxService and a generated Swagger 2.0. Complemented by Go SDKs, the shirotester CLI and the Substrate Agent Skill.