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mcp: bump protocol version from 2026-06-30 to 2026-07-28 (#1015)

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The new official date for the protocol version has been moved to
'2026-07-28'. Update all the references in the code of the old version.
This commit is contained in:
Guglielmo Colombo 2026-06-22 09:53:04 +02:00 • committed by GitHub
commit 17029489ff
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GPG key ID: B5690EEEBB952194
1 changed files with 137 additions and 137 deletions
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12
mcp/client.go
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@ -165,7 +165,7 @@ type ClientOptions struct {
// If non-zero, defines an interval for regular "ping" requests.
// If the peer fails to respond to pings originating from the keepalive check,
// the session is automatically closed.
// NOTE: The keepalive feature is only available for protocol versions < 2026-06-30
// NOTE: The keepalive feature is only available for protocol versions < 2026-07-28
KeepAlive time.Duration
// KeepAliveFailureThreshold is the number of consecutive keepalive ping
// failures tolerated before the session is closed. A value of 0 or 1
@ -285,7 +285,7 @@ func (c *Client) Connect(ctx context.Context, t Transport, opts *ClientSessionOp
protocolVersion = opts.protocolVersion
}
if protocolVersion >= protocolVersion20260630 {
if protocolVersion >= protocolVersion20260728 {
// Per SEP-2575, try the stateless server/discover RPC first. If the server
// signals it doesn't support it, fall back to the legacy initialize
// handshake.
@ -309,7 +309,7 @@ func (c *Client) Connect(ctx context.Context, t Transport, opts *ClientSessionOp
if errors.As(err, &werr) && werr.Code == CodeUnsupportedProtocolVersion && werr.Data != nil {
var data UnsupportedProtocolVersionData
if err := json.Unmarshal(werr.Data, &data); err == nil {
if negotiatedVersion := negotiateMutuallySupportedVersion(data.Supported); negotiatedVersion != "" && negotiatedVersion >= protocolVersion20260630 {
if negotiatedVersion := negotiateMutuallySupportedVersion(data.Supported); negotiatedVersion != "" && negotiatedVersion >= protocolVersion20260728 {
discoverCtx = context.WithValue(ctx, protocolVersionContextKey{}, negotiatedVersion)
continue
}
@ -381,7 +381,7 @@ func (c *Client) discover(ctx context.Context, cs *ClientSession) (*InitializeRe
} else {
negotiated = negotiateMutuallySupportedVersion(res.SupportedVersions)
}
if negotiated == "" || negotiated < protocolVersion20260630 {
if negotiated == "" || negotiated < protocolVersion20260728 {
// If there is no overlap, fall back to initialize so version
// negotiation can happen via the legacy path.
return nil, jsonrpc2.ErrUnsupportedProtocolVersion
@ -436,11 +436,11 @@ type clientSessionState struct {
func (cs *ClientSession) InitializeResult() *InitializeResult { return cs.state.InitializeResult }
// usesNewProtocol reports whether this session has negotiated a protocol
// version >= 2026-06-30, which requires the SEP-2575 per-request `_meta`
// version >= 2026-07-28, which requires the SEP-2575 per-request `_meta`
// triple on every outgoing request.
func (cs *ClientSession) usesNewProtocol() bool {
res := cs.state.InitializeResult
return res != nil && res.ProtocolVersion >= protocolVersion20260630
return res != nil && res.ProtocolVersion >= protocolVersion20260728
}
// injectRequestMeta populates the SEP-2575 per-request `_meta` triple