[router] fix FunctionCallResponse proto, support arguments is null (#9875)

Co-authored-by: forestlee95 <forestlee95@foxmail.com>

[router] fix FunctionCallResponse proto, support arguments is null (#9875)
Co-authored-by: forestlee95 <forestlee95@foxmail.com>
21e1bc47 · Bruce-x-1997 · GitHub · 9a0cac1b · 21e1bc47
Unverified Commit 21e1bc47 authored Sep 02, 2025 by Bruce-x-1997 Committed by GitHub Sep 01, 2025
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sgl-router/src/protocols/spec.rs sgl-router/src/protocols/spec.rs +2 -1

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--- a/sgl-router/src/protocols/spec.rs
+++ b/sgl-router/src/protocols/spec.rs
@@ -1565,7 +1565,8 @@ pub enum FunctionCall {
 #[derive(Debug, Clone, Deserialize, Serialize)]
 pub struct FunctionCallResponse {
    pub name: String,
-    pub arguments: String, // JSON string
+    #[serde(default)]
+    pub arguments: Option<String>, // JSON string
 }

 // ============= Usage Tracking =============