From eac3781079410e53392a723cdc6ee2260d88bca8 Mon Sep 17 00:00:00 2001
From: hobokenchicken <dustin@dustin.coffee>
Date: Thu, 5 Mar 2026 17:15:16 +0000
Subject: [PATCH] fix(gemini): force snake_case naming for thought_signature

- Despite struct-wide camelCase policy, Gemini 3 reasoning models strictly require 'thought_signature' in snake_case.
- Explicitly rename the field to resolve the 'missing thought_signature' 400 error.
---
 src/providers/gemini.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/providers/gemini.rs b/src/providers/gemini.rs
index d7628865..e59d14b5 100644
--- a/src/providers/gemini.rs
+++ b/src/providers/gemini.rs
@@ -57,7 +57,7 @@ struct GeminiPart {
     function_response: Option<GeminiFunctionResponse>,
     #[serde(skip_serializing_if = "Option::is_none")]
     thought: Option<String>,
-    #[serde(skip_serializing_if = "Option::is_none", rename = "thoughtSignature")]
+    #[serde(skip_serializing_if = "Option::is_none", rename = "thought_signature")]
     thought_signature: Option<String>,
 }