chore(deps): Update Rust crate rmcp to v3 - #175
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This PR contains the following updates:
2.0.0→3.0.0Release Notes
modelcontextprotocol/rust-sdk (rmcp)
v3.1.0Compare Source
Added
Fixed
Other
v3.0.1Compare Source
Fixed
v3.0.0Compare Source
RMCP 3.0 adds support for MCP 2026-07-28. Review the protocol key changes and the RMCP 3.0 migration guide before upgrading from 2.x.
Breaking changes
Mcp-Session-Id, standalone GET stream, DELETE-based session termination, orLast-Event-IDresumption. RMCP creates a fresh handler per request, so persistent state must live outside the handler.stateful_modeis renamed tolegacy_session_modeand now only controls older protocol versions; custom SSE clients must also accept an optional session ID.initialize/notifications/initialized; each request carries the protocol version and client capabilities in_meta, and servers exposeserver/discover. RMCP clients opt into this lifecycle withserve_with_lifecycleandClientLifecycleMode::DiscoverorAuto; the existingserve()path remains available for legacy initialization.subscriptions/listenreplaces the standalone GET stream andresources/subscribe/resources/unsubscribe.ping,logging/setLevel, andnotifications/roots/list_changedare unavailable under 2026-07-28; RMCP retains their APIs for legacy protocol sessions.ServerHandler::call_tool,get_prompt, andread_resourcenow return MRTR-aware response enums. Manual handler implementations and exhaustiveServerResultmatches must handleInputRequiredResult, and result models carry an optionalresult_typefor legacy wire compatibility.io.modelcontextprotocol/tasksextension, including new task handlers, methods, andTaskManagerAPIs.MetaObject,RequestMetaObject, andNotificationMetaObject;Annotations::last_modifiedis nowOption<String>; and tool structured content accepts anyserde_json::Value.AuthorizationRequest; metadata discovery is renamed toresolve_metadataand returns provenance; and custom OAuth HTTP errors are now boxed source errors.What's Changed
issuerby @jamadeo in #1051issuerin authorization server metadata by default by @jamadeo in #1054New Contributors
Full Changelog: modelcontextprotocol/rust-sdk@rmcp-v2.2.0...rmcp-v3.0.0
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