From 991551b3f50e00921bdbebdd578483543f4f2e37 Mon Sep 17 00:00:00 2001
From: Aishanee Shah <aishaneeshah@google.com>
Date: Sun, 8 Feb 2026 16:29:35 +0000
Subject: [PATCH] fix(core): reset lastUsedModelId in startChat to prevent
 stale tool cache

---
 packages/core/src/core/client.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/packages/core/src/core/client.ts b/packages/core/src/core/client.ts
index d6afeac4be..4781dd7618 100644
--- a/packages/core/src/core/client.ts
+++ b/packages/core/src/core/client.ts
@@ -332,6 +332,7 @@ export class GeminiClient {
   ): Promise<GeminiChat> {
     this.forceFullIdeContext = true;
     this.hasFailedCompressionAttempt = false;
+    this.lastUsedModelId = undefined;
 
     const toolRegistry = this.config.getToolRegistry();
     const toolDeclarations = toolRegistry.getFunctionDeclarations();