From d248c9161119b01e5411fb6483648c7031152826 Mon Sep 17 00:00:00 2001
From: mingmxren <renmingxv@gmail.com>
Date: Thu, 5 Mar 2026 22:59:31 +0800
Subject: [PATCH] fix(commands): remove unintended config mutation in
 SwitchModel

SwitchModel should only update the routed agent's runtime Model field.
Writing to cfg.Agents.Defaults.ModelName was a behavioral change that
corrupts the default agent config when switching a non-default agent.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 pkg/agent/loop.go | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/pkg/agent/loop.go b/pkg/agent/loop.go
index 195623dc5..d2a4e27b6 100644
--- a/pkg/agent/loop.go
+++ b/pkg/agent/loop.go
@@ -1532,9 +1532,6 @@ func (al *AgentLoop) buildCommandsRuntime(agent *AgentInstance) *commands.Runtim
 		rt.SwitchModel = func(value string) (string, error) {
 			oldModel := agent.Model
 			agent.Model = value
-			if al.cfg != nil {
-				al.cfg.Agents.Defaults.ModelName = value
-			}
 			return oldModel, nil
 		}
 	}