The fleet console as a served surface: a read-only observability peer presenting membership, discovery, and space state over HTTP. A HAL+JSON API (application/hal+json links, Spring HATEOAS compatible), a Server-Sent Events activity stream, a single-file no-build web UI themed by CSS variables, and the ConsolePanel SPI so applications add their own panels. Served by the JDK HttpServer like the A2A gateway, so the core carries no web framework; the Spring Boot starter ...