User-facing annotations, interfaces, and SPIs for MCP tool/prompt/resource authors.

Transport-agnostic MCP server runtime: protocol interfaces, session handling, and implementation.

MCP Tasks extension (io.modelcontextprotocol/tasks): declare durable, pollable long-running tool calls via @McpTask and the tasks/get, tasks/update, tasks/cancel methods.

MCP Apps extension (io.modelcontextprotocol/ui): declare ui:// HTML resources and link them to tools via _meta.ui, server-side only.

SLF4J MDC correlation interceptor for MCP handler invocations. Contributes a single MethodInterceptor that stamps mcp.session, mcp.handler.kind, and mcp.handler.name onto the MDC for the duration of each handler call so every log line — including ...

JMustache-backed PromptTemplateFactory implementation for Mocapi.

PromptTemplateFactory backed by Spring's PropertyPlaceholderHelper — zero extra dependencies for Spring Boot apps.