Obsolete Roots, Sampling, and Logging surface area per SEP-2577#1651
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tarekgh wants to merge 1 commit into
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Obsolete Roots, Sampling, and Logging surface area per SEP-2577#1651tarekgh wants to merge 1 commit into
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Mark all public API surface for the Roots, Sampling, and Logging features as [Obsolete] in line with SEP-2577. This covers protocol DTOs, capability properties, method-name constants, convenience methods, handlers, builders, filters, and the related sampling/roots helpers on the input request/response types. There is no functional or wire behavior change; the features continue to work exactly as before. All three features share a single diagnostic ID (MCP9005) so consumers can opt out with one suppression, while feature-specific messages keep the diagnostics distinguishable. Documents the new diagnostic in docs/list-of-diagnostics.md and suppresses MCP9005 where the SDK, tests, and samples exercise the deprecated APIs internally.
PranavSenthilnathan
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Jun 17, 2026
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| <!-- Suppress the Roots, Sampling, and Logging obsoletion warning (SEP-2577) in sample projects | ||
| that demonstrate the deprecated features, which continue to work. --> |
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Are there other projects besides the logging sample project that require this? Ideally out samples shouldn't use deprecated features unless they're specifically samples for that feature.
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Summary
Marks the public API surface for the Roots, Sampling, and Logging features as
[Obsolete]in line with SEP-2577, which deprecates these three features in specification version 2026-07-28.There is no functional or wire-behavior change. The features continue to work exactly as before; consumers simply get a compile-time deprecation warning guiding them away from the deprecated surface.
What is deprecated
The deprecation covers the full surface area of all three features:
Root,ListRootsResult,CreateMessageRequestParams,CreateMessageResult,SamplingMessage,ModelPreferences,LoggingLevel,SetLevelRequestParams,LoggingMessageNotificationParams, and related types).RootsCapability,SamplingCapability,LoggingCapability, and the corresponding properties onClientCapabilities/ServerCapabilities).RequestMethodsandNotificationMethods.Diagnostic ID
All three features share a single diagnostic ID, MCP9005, so consumers can opt out with one suppression. Feature-specific messages (Roots, Sampling, Logging) keep the diagnostics distinguishable in build output.
docs/list-of-diagnostics.md.MCP9005internally where the SDK, tests, and samples still exercise the deprecated APIs.Validation
dotnet build -c Release: succeeds with 0 warnings (TreatWarningsAsErrors=true).dotnet test -c Release: all tests pass.