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Commits on Apr 30, 2026

• Replace StreamJsonRpc with a custom JSON-RPC implementation in the .NET SDK (#1170)

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  stephentoub

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Commits on Apr 24, 2026

• Per-session GitHub authentication for all SDK languages, plus update runtime and permissions to match (#1124)

  SteveSandersonMS

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Commits on Apr 21, 2026

• SessionFs structured error contract and codegen changes

  SteveSandersonMS

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Commits on Apr 16, 2026

• Add runtime header options across SDKs (#1094)

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  stephentoub

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Commits on Apr 14, 2026

• Naming improvements via codegen changes (#1043)

  SteveSandersonMS

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Commits on Apr 13, 2026

• Enhance C# generator with richer typing and data annotations (#1067)

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  stephentoub

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Commits on Apr 10, 2026

• Fix CallToolResult handling across all SDKs (#1049)

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Commits on Apr 7, 2026

• Add session fs support across SDKs (#1036)

  SteveSandersonMS

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• fix: tolerate unknown hook types in .NET and Go SDKs (#1013)

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• Add modelCapabilities override to all SDK languages (#1029)

  SteveSandersonMS

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Commits on Apr 3, 2026

• Update @github/copilot to 1.0.17 (#999)

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Commits on Apr 2, 2026

• Close Language Gaps for Commands + Dialogs/Elicitations (#960)

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  MRayermannMSFT

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Commits on Mar 20, 2026

• Add fine-grained system prompt customization (customize mode) (#816)

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• fix: Go codegen enum prefixes and type name reconciliation (#883)

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Commits on Mar 13, 2026

• Add reasoningEffort to setModel/session.model.switchTo across all SDKs (#712)

  patniko

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• feat: add OpenTelemetry support across all SDKs (#785)

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• Serialize event dispatch in .NET and Go SDKs (#791)

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Commits on Mar 12, 2026

• Add no-result permission handling for extensions (#802)

  SteveSandersonMS

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Commits on Mar 10, 2026

• Register sessions before RPC and add SessionConfig.OnEvent (#664)

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  stephentoub

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Commits on Mar 9, 2026

• Update to match runtime changes (#737)

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  SteveSandersonMS

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• Fix codegen for discriminated unions nested within other types (#736)

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  SteveSandersonMS

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Commits on Mar 7, 2026

• Handle tool and permission broadcasts via event model (protocol v3) (#686)

  SteveSandersonMS

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Commits on Mar 5, 2026

• docs: clarify session destroy vs delete semantics (#599)

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  patniko

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• Improve .NET SDK build infrastructure and documentation (#643)

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• Add PermissionRequestResultKind type for .NET and Go SDKs (#631)

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Commits on Mar 3, 2026

• Add session.setModel() for mid-session model switching (#621)

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Commits on Mar 2, 2026

• [C#] Use event delegate for thread-safe, insertion-ordered event handler dispatch (#624)

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• [C#] Remove unnecessary SemaphoreSlim locks for handler fields (#625)

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• [C#] Deduplicate OnDisposeCall and improve implementation (#626)

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Commits on Feb 24, 2026

• Require permission handler on session creation (#554)

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  SteveSandersonMS

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Commits on Feb 23, 2026

• [dotnet] Fix SendAndWaitAsync to throw OperationCanceledException on external cancellation (#543)

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Commits on Feb 18, 2026

• Breaking change: deny all permissions by default (#509)

  SteveSandersonMS

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Commits on Feb 16, 2026

• Fix ObjectDisposedException when disposing session after client.StopAsync() (#481)

  SteveSandersonMS

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Commits on Feb 13, 2026

• RPC codegen (#464)

  SteveSandersonMS

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Commits on Jan 29, 2026

• feat: add hooks and user input handlers to all SDKs with e2e tests (#269)

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  friggeri

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