feat(transport): add Streamable HTTP transport at /mcp#117
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4 tasks
* feat(cluster): honor --request-timeout flag in K8s client config * fix(lint): replace WriteString(Sprintf) with Fprintf (staticcheck QF1012)
This was referenced May 12, 2026
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Summary
Adds the Streamable HTTP transport (MCP spec 2025-03-26) at
/mcpalongside the existing legacy SSE transport.kai.Server.ServeStreamableHTTP(addr)usingmcp-go'sserver.NewStreamableHTTPServer.registerOpsEndpointsandrunHTTPhelpers used by both HTTP transports — no behavioural change to SSE path.--transport=streamable-http(orhttp) selects the new transport.--transport=sseis accepted as a deprecated alias ofsse-legacy(logs a warning). Unknown values now return a clear error instead of silently falling back to stdio.Why
The HTTP+SSE transport (two endpoints,
/sse+/message) was deprecated in spec 2025-03-26. Modern clients (Inspector ≥ 0.10, Claude.ai web) expect a single/mcpendpoint withMcp-Session-Idresumption. SSE stays available behindsse-legacyfor one release cycle.Stacked on
Based on
feat/tool-annotations(#116). Merge order: #114 → #115 → #116 → this.Test plan
go build ./...go vet ./...go test -race ./...kai --transport=streamable-httpthennpx @modelcontextprotocol/inspector http://localhost:8080/mcp