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Align 2026-07-28 wire with spec PR #3002: serverInfo in result _meta, clientInfo optional (#2513)

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Felix Weinberger 2026-07-20 16:09:55 +01:00 • committed by GitHub
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19
test/e2e/requirements.ts
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@ -1365,7 +1365,24 @@ export const REQUIREMENTS: Record<string, Requirement> = {
},
'protocol:meta:result-to-client': {
source: 'https://modelcontextprotocol.io/specification/2025-11-25/basic#_meta',
behavior: "_meta returned in a handler's result is delivered intact to the requesting client."
behavior:
"_meta returned in a handler's result is delivered intact to the requesting client. On a 2026-07-28 connection the delivered _meta additionally carries the SDK-stamped io.modelcontextprotocol/serverInfo key (spec PR #3002: servers SHOULD identify themselves on every response); on 2025-era connections nothing is ever added."
},
'protocol:meta:server-identity': {
source: 'https://modelcontextprotocol.io/specification/draft/server/discover',
behavior:
"On the 2026-07-28 revision the server identifies itself via _meta['io.modelcontextprotocol/serverInfo'] on its responses (spec PR #3002), and the client resolves getServerVersion() from the discover result's _meta.",
transports: ['entryModern'],
addedInSpecVersion: '2026-07-28',
note: 'entryModern is the only arm that negotiates a real 2026-07-28 connection (the other arms run the legacy handshake), and the body also POSTs a raw discover via wired.fetch to assert the wire-level _meta stamp.'
},
'protocol:envelope:client-info-optional': {
source: 'https://modelcontextprotocol.io/specification/draft/basic#meta',
behavior:
'A 2026-07-28 request whose per-request _meta envelope omits io.modelcontextprotocol/clientInfo is served normally — clientInfo is a SHOULD (spec PR #3002), never a validation requirement.',
transports: ['entryModern'],
addedInSpecVersion: '2026-07-28',
note: "The wired SDK client always sends clientInfo (the spec SHOULD), so the omission can only be put on the wire as a raw POST through wired.fetch — which needs the entry arm's in-process endpoint."
},
'protocol:request-id:unique': {
entryExclusions: [{ arm: 'entryModern', reason: 'method-not-in-modern-registry' }],