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

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Stephen Halter 2026-03-27 13:56:16 -07:00 • committed by GitHub
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docs/list-of-diagnostics.md
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@ -37,3 +37,4 @@ When APIs are marked as obsolete, a diagnostic is emitted to warn users that the
| `MCP9001` | In place | The `EnumSchema` and `LegacyTitledEnumSchema` APIs are deprecated as of specification version 2025-11-25. Use the current schema APIs instead. |
| `MCP9002` | Removed | The `AddXxxFilter` extension methods on `IMcpServerBuilder` (e.g., `AddListToolsFilter`, `AddCallToolFilter`, `AddIncomingMessageFilter`) were superseded by `WithRequestFilters()` and `WithMessageFilters()`. |
| `MCP9003` | In place | The `RequestContext<TParams>(McpServer, JsonRpcRequest)` constructor is obsolete. Use the overload that accepts a `parameters` argument: `RequestContext<TParams>(McpServer, JsonRpcRequest, TParams)`. |
| `MCP9004` | In place | <xref:ModelContextProtocol.AspNetCore.HttpServerTransportOptions.EnableLegacySse> opts into the legacy SSE transport which has no built-in HTTP-level backpressure. Use Streamable HTTP instead. See [Stateless — Legacy SSE transport](xref:stateless#legacy-sse-transport) for details. |