- Upgrade mcp-spring-webmvc from 0.10.0 to 0.18.1 (adds WebMvcStreamableServerTransportProvider alongside the legacy SSE provider) - Add mcp-json-jackson2 0.18.1 for JacksonMcpJsonMapper adapter - Exclude McpWebMvcServerAutoConfiguration (SSE transport) via spring.autoconfigure.exclude; register WebMvcStreamableServerTransportProvider and its RouterFunction manually in McpConfig so Spring AI's McpServerAutoConfiguration picks up the correct transport bean - Remove sse-message-endpoint / sse-endpoint from application.yml; all MCP traffic now flows through POST+GET /mcp - Remove McpSseMethodNotAllowed workaround from WebConfig and drop 'sse' from SPA fallback exclusions (no longer needed) Clients should connect with type: http at https://trueref.sal.giize.com/mcp