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Follow-ups to #1610: de-draft 2026-07-28 terminology, renumber error codes, ProtocolVersion floor (#1671)

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Stephen Halter 2026-06-25 14:07:52 -07:00 • committed by GitHub
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14
src/ModelContextProtocol.Core/Protocol/MetaKeys.cs
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@ -9,9 +9,9 @@ public static class MetaKeys
/// The metadata key used to carry the MCP protocol version in a request's <c>_meta</c> field.
/// </summary>
/// <remarks>
/// Introduced by the draft protocol revision (SEP-2575). For HTTP transports, the value MUST
/// match the <c>MCP-Protocol-Version</c> header. Servers reject mismatched versions with
/// <see cref="McpErrorCode.UnsupportedProtocolVersion"/>.
/// Introduced by the 2026-07-28 protocol revision (SEP-2575). For HTTP transports, the value MUST
/// match the <c>MCP-Protocol-Version</c> header. Servers reject a header/body mismatch with
/// <see cref="McpErrorCode.HeaderMismatch"/>.
/// </remarks>
public const string ProtocolVersion = "io.modelcontextprotocol/protocolVersion";
@ -19,7 +19,7 @@ public static class MetaKeys
/// The metadata key used to identify the client software in a request's <c>_meta</c> field.
/// </summary>
/// <remarks>
/// Introduced by the draft protocol revision (SEP-2575). Carries an <see cref="Protocol.Implementation"/>
/// Introduced by the 2026-07-28 protocol revision (SEP-2575). Carries an <see cref="Protocol.Implementation"/>
/// describing the client; replaces the <c>clientInfo</c> previously sent only with <c>initialize</c>.
/// </remarks>
public const string ClientInfo = "io.modelcontextprotocol/clientInfo";
@ -28,7 +28,7 @@ public static class MetaKeys
/// The metadata key used to declare client capabilities in a request's <c>_meta</c> field.
/// </summary>
/// <remarks>
/// Introduced by the draft protocol revision (SEP-2575). Carries a <see cref="Protocol.ClientCapabilities"/>
/// Introduced by the 2026-07-28 protocol revision (SEP-2575). Carries a <see cref="Protocol.ClientCapabilities"/>
/// describing what optional features the client supports for this specific request. Servers MUST NOT
/// infer capabilities from previous requests.
/// </remarks>
@ -38,7 +38,7 @@ public static class MetaKeys
/// The metadata key used to specify the desired log level for a request's resulting log notifications.
/// </summary>
/// <remarks>
/// Introduced by the draft protocol revision (SEP-2575). Carries a <see cref="Protocol.LoggingLevel"/>.
/// Introduced by the 2026-07-28 protocol revision (SEP-2575). Carries a <see cref="Protocol.LoggingLevel"/>.
/// Replaces the legacy <see cref="RequestMethods.LoggingSetLevel"/> RPC. When absent, the server
/// MUST NOT send log notifications for the request.
/// </remarks>
@ -49,7 +49,7 @@ public static class MetaKeys
/// <see cref="RequestMethods.SubscriptionsListen"/> subscription.
/// </summary>
/// <remarks>
/// Introduced by the draft protocol revision (SEP-2575). Allows clients to demultiplex notifications
/// Introduced by the 2026-07-28 protocol revision (SEP-2575). Allows clients to demultiplex notifications
/// belonging to different subscriptions on a shared channel (especially STDIO).
/// </remarks>
public const string SubscriptionId = "io.modelcontextprotocol/subscriptionId";