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Commits on Apr 9, 2026

• Fix stateless HTTP transport advertising listChanged capability (#1509)

  jayaraman-venkatesan

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  07435dc

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Commits on Apr 6, 2026

• Fix process crash when testing Stderr (#1449)

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  ericstj

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  2e7209c

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Commits on Mar 30, 2026

• Make ClientTransportClosedException public and unify transport exception handling (#1467)

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  3 peopleauthored
  7662ce6

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Commits on Mar 27, 2026

• Add stateless doc, prefer stateless mode and disable legacy SSE by default (#1468)

  halter73

  authored
  8eb4023

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• Fix WithMeta + WithProgress causing tool invocation failure (#1464)

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  stephentoub

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  49bf170

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• Fix: create per-task DI scope in ExecuteToolAsTaskAsync to prevent ObjectDisposedException (#1433)

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  stephentoub

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  cf63f0e

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• Add 3-arg RequestContext constructor and obsolete 2-arg to eliminate null-forgiving operator usage (#1462)

  Copilot

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  7dcdbaf

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• Route SendRequestAsync logic through outgoing message filters (#1465)

  halter73

  authored
  afc40d1

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• docs: align roots terminology with MCP spec clarification (#1469)

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  stephentoub

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  e700951

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Commits on Mar 23, 2026

• Support specifying OutputSchema independently of return type for tools returning CallToolResult (#1425)

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  3 peopleauthored
  2958a75

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Commits on Mar 2, 2026

• Wait for in-flight message handlers before ProcessMessagesCoreAsync returns (#1403)

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  stephentoub

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  89fcf3f

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• Add client completion notification and details (#1368)

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  stephentoub

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  b965a7e

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Commits on Mar 1, 2026

• Auto-populate completion handlers from AllowedValuesAttribute on prompt/resource parameters (#1380)

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  stephentoub

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  4af2596

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Commits on Feb 28, 2026

• Fix Extensions not being copied to ServerCapabilities during initialization (#1399)

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  stephentoub

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  94aa695

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Commits on Feb 26, 2026

• Register ping handler in McpSessionHandler to support server-initiated pings (#1391)

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  stephentoub

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  919e838

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• Simplify and update package README.md files for stable release (#1388)

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  3 peopleauthored
  1108117

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Commits on Feb 24, 2026

• Add 2025-03-26 OAuth backward compatibility for client conformance (#1374)

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  jeffhandley

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  4e68a4e

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• Fix XML documentation spelling, grammar, and correctness issues across SDK (#1372)

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  3 peopleauthored
  3cc4863

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• Fix McpClientPrompt/Resource types to use RequestOptions like McpClientTool does (#1370)

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  stephentoub

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  8c46411

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• Fix compilation errors in README code samples (#1369)

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  jeffhandley

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  authored
  1446cd7

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• Add explicit [Experimental] protected constructors to McpClient and McpServer (#1363)

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  3 peopleauthored
  124b43b

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Commits on Feb 23, 2026

• Fix CreateMessageRequestParams.Metadata type to JsonObject (#1354)

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  stephentoub

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  ce2a5e4

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• Normalize CallToolResult.StructuredContent to JsonElement? (#1357)

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  stephentoub

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  0a0a575

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• Address asymmetry in McpServerHandlers/McpClientHandlers and make all filter properties settable (#1337)

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  stephentoub

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  a2ee0c8

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• Prevent cancellation of initialize request per MCP spec (#1350)

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  stephentoub

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  4f70954

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• Increase MaxReconnectionAttempts default from 2 to 5 (#1355)

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  stephentoub

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  374f719

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• Fix base64 deserialization when JSON encoder escapes forward slashes (#1342)

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  stephentoub

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  774a1db

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• Remove server back-references from protocol DTO types (#1345)

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  stephentoub

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  74622d0

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• Fix off-by-one error in reconnection attempts (#1356)

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  stephentoub

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  2c9bb5d

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• Make LoggingMessageNotificationParams.Data required per MCP spec (#1353)

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  stephentoub

  authored
  571e4dc

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• Make Tool.Name required to match other protocol types (#1351)

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  stephentoub

  authored
  9b5d0fe

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• Clarify null semantics in ToolAnnotations hint property docs (#1346)

  Copilot

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  f241b4a

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• Fix malformed XML doc on `McpServerPrimitiveCollection.Contains` (#1348)

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  741eab7

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Commits on Feb 21, 2026

• Fix _meta properties to use JsonObject (#1341)

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  stephentoub

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  d429b0b

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• Add Extensions support to ClientCapabilities and ServerCapabilities (#1317)

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  stephentoub

  authored
  c2aa6a5

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