modelcontextprotocol/csharp-sdk
Watch
1
0
Fork
You've already forked csharp-sdk
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions 2

Default draft protocol support: sessionless + handshake-less (SEP-2575 + SEP-2567) (#1610)

Browse source
This commit is contained in:
Stephen Halter 2026-06-23 21:24:22 -07:00 • committed by GitHub
commit 6c323e783b
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
1 changed files with 5704 additions and 712 deletions
Download patch file Download diff file Expand all files Collapse all files

14
tests/ModelContextProtocol.Tests/Server/DraftProtocolBackcompatTests.cs
View file

@ -9,15 +9,15 @@ namespace ModelContextProtocol.Tests.Server;
/// Verifies that the server-to-client request methods (<see cref="McpServer.ElicitAsync(ElicitRequestParams, CancellationToken)"/>,
/// <see cref="McpServer.SampleAsync(CreateMessageRequestParams, CancellationToken)"/>,
/// <see cref="McpServer.RequestRootsAsync"/>) keep working when the negotiated protocol revision is
/// <c>DRAFT-2026-v1</c> on a stateful session - for example, stdio.
/// <c>2026-07-28</c> on a stateful session - for example, stdio.
/// </summary>
/// <remarks>
/// Under <c>DRAFT-2026-v1</c> the spec removes the corresponding server-to-client request methods, but
/// Under <c>2026-07-28</c> the spec removes the corresponding server-to-client request methods, but
/// the SDK only fails fast in stateless mode (where the existing <c>ThrowIf*Unsupported</c> guards already
/// throw "X is not supported in stateless mode" because <see cref="McpServer.ClientCapabilities"/> is
/// <see langword="null"/>). Stdio is implicitly stateful - one <see cref="McpServer"/> per process - so the
/// legacy <c>elicitation/create</c> / <c>sampling/createMessage</c> / <c>roots/list</c> flow still works.
/// A future PR is expected to force <c>DRAFT-2026-v1</c> Streamable HTTP servers to stateless mode, at which
/// A future PR is expected to force <c>2026-07-28</c> Streamable HTTP servers to stateless mode, at which
/// point those configurations will start throwing through the existing stateless guard.
/// </remarks>
public sealed class DraftProtocolBackcompatTests : ClientServerTestBase
@ -31,7 +31,7 @@ public sealed class DraftProtocolBackcompatTests : ClientServerTestBase
{
services.Configure<McpServerOptions>(options =>
{
options.ProtocolVersion = "DRAFT-2026-v1";
options.ProtocolVersion = "2026-07-28";
});
mcpServerBuilder.WithTools([
@ -47,7 +47,7 @@ public sealed class DraftProtocolBackcompatTests : ClientServerTestBase
StartServer();
await using var client = await CreateMcpClientForServer(new McpClientOptions
{
ProtocolVersion = "DRAFT-2026-v1",
ProtocolVersion = "2026-07-28",
Capabilities = new ClientCapabilities
{
Elicitation = new ElicitationCapability(),
@ -69,7 +69,7 @@ public sealed class DraftProtocolBackcompatTests : ClientServerTestBase
StartServer();
await using var client = await CreateMcpClientForServer(new McpClientOptions
{
ProtocolVersion = "DRAFT-2026-v1",
ProtocolVersion = "2026-07-28",
Capabilities = new ClientCapabilities
{
Sampling = new SamplingCapability(),
@ -96,7 +96,7 @@ public sealed class DraftProtocolBackcompatTests : ClientServerTestBase
StartServer();
await using var client = await CreateMcpClientForServer(new McpClientOptions
{
ProtocolVersion = "DRAFT-2026-v1",
ProtocolVersion = "2026-07-28",
Capabilities = new ClientCapabilities
{
Roots = new RootsCapability(),