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

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halter73 wants to merge 25 commits into

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halter73/remove-session-id-draft

Commits on Jun 6, 2026

Add fallback negotiation, MinProtocolVersion, server-side _meta protocolVersion validation, and raw stream conformance tests

halter73
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Add raw HTTP conformance tests + document MCP9005

halter73
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Expose DraftProtocolVersion publicly and update stateless concept doc

halter73
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Merge origin/main into halter73/remove-session-id-draft

halter73
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Fix draft client rejecting downgraded version after legacy fallback

halter73
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Gate built-in ping handler to legacy protocol versions

halter73
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Commits on Jun 11, 2026

Merge origin/main into halter73/remove-session-id-draft

halter73
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Merge per-request client capabilities instead of overwriting them

halter73
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Add SEP-2549 caching hints (ttlMs and cacheScope) to cacheable results

Tarek Mahmoud Sayed
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halter73
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Address review feedback on cacheScope converter and conformance gate

Tarek Mahmoud Sayed
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halter73
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Drop TimeSpanMillisecondsConverterSharedTests after McpTask removal

halter73
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Add ttlMs and cacheScope to DiscoverResult per spec PR #2855

halter73
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Add regression tests for SEP-2575 _meta envelope on list-style requests

halter73
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Clarify stdio fallback comment per spec PR #2844

halter73
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Accept null-id JSON-RPC error responses per spec

halter73
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Surface JSON-RPC errors in HTTP 400 bodies as McpProtocolException

halter73
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Surface HeaderMismatch errors instead of falling back to legacy

halter73
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Recognize JSON-RPC errors in AutoDetect HTTP transport (no SSE fallback)

halter73
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Commits on Jun 12, 2026