feat: 添加对 langfuse 监控的支持 (#242)

* docs: 更新类型检查的 CLAUDE.md

* feat: 添加模型 1M 上下文切换

* chore: remove prefetchOfficialMcpUrls call on startup

* docs: 添加 git commit 规范

* feat: 第一次接入 langfuse

* fix: 修复 generation 的计时的错误

* feat: 添加多 agent 的监控

* feat: 添加 /poor 省流模式，toggle 关闭 extract_memories 和 prompt_suggestion

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* chore: 修复 lock 文件

* chore: 更新类型依赖

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

src/services/tools/toolExecution.ts

@@ -50,6 +50,7 @@ import {
 } from '../../tools/ToolSearchTool/prompt.js'
 import { getAllBaseTools } from '../../tools.js'
 import type { HookProgress } from '../../types/hooks.js'
+import { recordToolObservation } from '../langfuse/index.js'
 import type {
   AssistantMessage,
   AttachmentMessage,
@@ -1300,6 +1301,16 @@ async function checkPermissionsAndCallTool(
         : String(result.data ?? '')
     endToolSpan(toolResultStr)
 
+    // Record tool observation in Langfuse (no-op if not configured)
+    recordToolObservation(toolUseContext.langfuseTrace ?? null, {
+      toolName: tool.name,
+      toolUseId: toolUseID,
+      input: processedInput,
+      output: toolResultStr,
+      startTime: new Date(startTime),
+      isError: false,
+    })
+
     // Map the tool result to API format once and cache it. This block is reused
     // by addToolResult (skipping the remap) and measured here for analytics.
     const mappedToolResultBlock = tool.mapToolResultToToolResultBlockParam(
@@ -1609,6 +1620,16 @@ async function checkPermissionsAndCallTool(
     })
     endToolSpan()
 
+    // Record error observation in Langfuse (no-op if not configured)
+    recordToolObservation(toolUseContext.langfuseTrace ?? null, {
+      toolName: tool?.name ?? 'unknown',
+      toolUseId: toolUseID,
+      input: processedInput ?? input,
+      output: errorMessage(error),
+      startTime: new Date(startTime),
+      isError: true,
+    })
+
     // Handle MCP auth errors by updating the client status to 'needs-auth'
     // This updates the /mcp display to show the server needs re-authorization
     if (error instanceof McpAuthError) {