platform

mcp/ucp.go

@@ -0,0 +1,40 @@
+package mcp
+
+import (
+	"encoding/json"
+	"log"
+)
+
+// extractUCPAgentMeta checks whether the JSON arguments carry a "meta" key with
+// a nested "ucp-agent.profile" (the UCP-Agent profile advertisement, a sibling
+// of the real arguments per the UCP spec). If present it logs the profile for
+// observability and strips "meta" so it does not leak into the tool's argument
+// namespace. When absent it returns the arguments unchanged — a no-op for tools
+// that don't speak UCP.
+func extractUCPAgentMeta(arguments json.RawMessage) json.RawMessage {
+	if len(arguments) == 0 {
+		return arguments
+	}
+	var obj map[string]json.RawMessage
+	if err := json.Unmarshal(arguments, &obj); err != nil {
+		return arguments
+	}
+	metaRaw, hasMeta := obj["meta"]
+	if !hasMeta {
+		return arguments
+	}
+	var meta struct {
+		UCPAgent *struct {
+			Profile string `json:"profile"`
+		} `json:"ucp-agent"`
+	}
+	if err := json.Unmarshal(metaRaw, &meta); err == nil && meta.UCPAgent != nil && meta.UCPAgent.Profile != "" {
+		log.Printf("ucp-agent: profile=%s", meta.UCPAgent.Profile)
+	}
+	delete(obj, "meta")
+	cleaned, err := json.Marshal(obj)
+	if err != nil {
+		return arguments
+	}
+	return cleaned
+}