From 53ddf35b78372af35fe5ebb6e6c8a287ae5b5aab Mon Sep 17 00:00:00 2001
From: mxrain <mxrain@yeah.net>
Date: Sun, 15 Feb 2026 11:38:28 +0800
Subject: [PATCH] fix: preserve ReasoningContent in toolloop for thinking
 models
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When using thinking models (e.g., Kimi K2.5), the API requires
all assistant messages with tool calls to include reasoning_content.
This field was missing in RunToolLoop, causing subagent failures with
the error: 已启用思考功能，但索引2处的助手工具调用消息中缺少推理内容

Aligns toolloop.go with the existing handling in agent/loop.go.
---
 pkg/tools/toolloop.go | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/pkg/tools/toolloop.go b/pkg/tools/toolloop.go
index 1302079b4..e63361342 100644
--- a/pkg/tools/toolloop.go
+++ b/pkg/tools/toolloop.go
@@ -97,8 +97,9 @@ func RunToolLoop(ctx context.Context, config ToolLoopConfig, messages []provider
 
 		// 6. Build assistant message with tool calls
 		assistantMsg := providers.Message{
-			Role:    "assistant",
-			Content: response.Content,
+			Role:             "assistant",
+			Content:          response.Content,
+			ReasoningContent: response.ReasoningContent, // Preserve for thinking models (e.g., GLM-Z1)
 		}
 		for _, tc := range response.ToolCalls {
 			argumentsJSON, _ := json.Marshal(tc.Arguments)