Merge branch 'main' of https://github.com/modelcontextprotocol/modelcontextprotocol into feat/tasks

Author: LucaButBoring

docs/legacy/concepts/architecture.mdx

@@ -201,6 +201,9 @@ enum ErrorCode {
   MethodNotFound = -32601,
   InvalidParams = -32602,
   InternalError = -32603,
+
+  // MCP-specific error codes in the range [-32000, -32099]
+  UrlElicitationRequired = -32042,
 }
 ```
 

docs/specification/draft/basic/lifecycle.mdx

@@ -64,7 +64,10 @@ The client **MUST** initiate this phase by sending an `initialize` request conta
         "listChanged": true
       },
       "sampling": {},
-      "elicitation": {},
+      "elicitation": {
+        "form": {},
+        "url": {}
+      },
       "tasks": {
         "requests": {
           "elicitation": {

docs/specification/draft/changelog.mdx

@@ -14,7 +14,8 @@ the previous revision, [2025-06-18](/specification/2025-06-18).
 3. Enhance authorization flows with incremental scope consent via `WWW-Authenticate` ([SEP-835](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/835))
 4. Provide guidance on tool names ([SEP-986](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/1603))
 5. Update `ElicitResult` and `EnumSchema` to use a more standards-based approach and support titled, untitled, single-select, and multi-select enums ([SEP-1330](https://github.com/modelcontextprotocol/modelcontextprotocol/issues/1330)).
-6. Add experimental support for [tasks](/specification/draft/basic/utilities/tasks) to enable tracking durable requests with polling and deferred result retrieval ([SEP-1686](https://github.com/modelcontextprotocol/modelcontextprotocol/issues/1686)).
+6. Added support for [URL mode elicitation](/specification/draft/client/elicitation#url-elicitation-requests)([SEP-1036](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/887))
+7. Add experimental support for [tasks](/specification/draft/basic/utilities/tasks) to enable tracking durable requests with polling and deferred result retrieval ([SEP-1686](https://github.com/modelcontextprotocol/modelcontextprotocol/issues/1686)).
 
 ## Minor changes