Uber Eng (Oct 1) — Estate microservices control-plane + data-plane for MCP at Uber scale: MCP Registry catalogs hundreds of MCP servers / thousands of tools; Proxy Gateway translates MCP↔HTTP/gRPC/TChannel, materializes virtual /<service>/mcp endpoints, refreshes in-memory config without restarts. AutoCrawler = Cadence-powered distributed workflow over IDL registry + native-MCP heartbeats (discovery ≠ exposure; owner enablement + config-diff approve/rollback). Runtime authz via Uber Access Control System (charter policies on humans/services/agents; tool-level overrides) + PII redaction; downstream via Muttley service-mesh sidecar.
Why you care: Board Microservices 8 + Auth/IAM rising — only board-weighted DistSys-adjacent NEW primary on a Go-EMPTY Sunday. Frame as estate microservices platform craft (Registry/Proxy/Cadence/Access Control/Muttley), not MCP-product announce and not inventing DistSys KEEP from this week's AI DistSys-literacy papers.