fix: preserve thinking variant for generated messages

Uses the selected thinking variant for Git-generated session prompts
Preserves current variant for voice-triggered messages

packages/ui/src/lib/gitApi.ts

@@ -348,6 +348,7 @@ type SessionGenerationContext = {
   providerID: string;
   modelID: string;
   agent?: string;
+  variant?: string;
 };
 
 const resolveSessionGenerationContext = (): SessionGenerationContext | null => {
@@ -370,11 +371,17 @@ const resolveSessionGenerationContext = (): SessionGenerationContext | null => {
     return null;
   }
 
+  const agentVariant = agent
+    ? context.getAgentModelVariantForSession(sessionId, agent, selectedModel.providerId, selectedModel.modelId)
+    : undefined;
+  const variant = agentVariant || config.currentVariant || undefined;
+
   return {
     sessionId,
     providerID: selectedModel.providerId,
     modelID: selectedModel.modelId,
     agent,
+    variant,
   };
 };
 
@@ -399,6 +406,7 @@ const runStructuredGenerationInActiveSession = async ({
     providerID: generationSession.providerID,
     modelID: generationSession.modelID,
     agent: generationSession.agent,
+    variant: generationSession.variant,
   });
   const trimmedDirectory = typeof directory === 'string' ? directory.trim() : '';
   const visiblePromptText = typeof visiblePrompt === 'string' ? visiblePrompt.trim() : '';
@@ -429,6 +437,7 @@ const runStructuredGenerationInActiveSession = async ({
         modelID: generationSession.modelID,
       },
       ...(generationSession.agent ? { agent: generationSession.agent } : {}),
+      ...(generationSession.variant ? { variant: generationSession.variant } : {}),
       parts: promptParts,
     });
   });

packages/ui/src/lib/voice/realtimeClientTools.ts

@@ -33,7 +33,7 @@ export const realtimeClientTools = {
         }
 
         // Get current provider and model from config store
-        const { currentProviderId, currentModelId, currentAgentName } = useConfigStore.getState();
+        const { currentProviderId, currentModelId, currentAgentName, currentVariant } = useConfigStore.getState();
         if (!currentProviderId || !currentModelId) {
             console.error("[Voice] No provider/model selected");
             return "error (no provider or model selected)";
@@ -43,7 +43,16 @@ export const realtimeClientTools = {
             console.log("[Voice] Sending message to session:", sessionId);
             await useSessionUIStore
                 .getState()
-                .sendMessage(parsed.data.message, currentProviderId, currentModelId, currentAgentName ?? undefined);
+                .sendMessage(
+                    parsed.data.message,
+                    currentProviderId,
+                    currentModelId,
+                    currentAgentName ?? undefined,
+                    undefined,
+                    undefined,
+                    undefined,
+                    currentVariant ?? undefined,
+                );
             return "sent";
         } catch (error) {
             console.error("[Voice] Failed to send message:", error);