diff --git a/auto-setup.ps1 b/auto-setup.ps1
index adebbfc..14415d8 100644
--- a/auto-setup.ps1
+++ b/auto-setup.ps1
@@ -16,7 +16,7 @@ param(
 $ErrorActionPreference = "Stop"
 
 # ─── 版本号 (每次更新递增, build.ps1 自动读取) ──────
-$BWVersion = "1.9.0"
+$BWVersion = "2.0.0"
 
 # ─── B4: 单实例保护 (防止双击两次导致竞态) ─────────
 $mutexCreated = $false
@@ -1081,8 +1081,10 @@ if (Test-Path $templateFile) {
 
     $content = Get-Content $templateFile -Raw
     $content = $content -replace '\{\{CLAUDE_ROOT\}\}', $claudeRoot
-    $content = $content -replace '\{\{HOME\}\}', ($homeDir -replace '\\', '\\')
-    $content = $content -replace '\{\{PWSH_PATH\}\}', ($pwshJsonPath -replace '\\', '\\')
+    # HOME 必须用正斜杠: C:\Users\x 中 \U 是非法 JSON 转义序列
+    $homeForward = $homeDir.Replace('\', '/')
+    $content = $content -replace '\{\{HOME\}\}', $homeForward
+    $content = $content -replace '\{\{PWSH_PATH\}\}', $pwshJsonPath
 
     Set-Content $settingsFile -Value $content -Encoding UTF8
     Log-OK "settings.json 已渲染 (ROOT=$claudeRoot, SHELL=$pwshJsonPath)"
@@ -1093,9 +1095,9 @@ if (Test-Path $templateFile) {
     if (Test-Path $localTpl) {
         $lc = Get-Content $localTpl -Raw
         $lc = $lc -replace '\{\{CLAUDE_ROOT\}\}', $claudeRoot
-        $lc = $lc -replace '\{\{HOME\}\}', ($homeDir -replace '\\', '\\')
+        $lc = $lc -replace '\{\{HOME\}\}', $homeForward
         $lc = $lc -replace '\{\{USERNAME\}\}', $env:USERNAME
-        $lc = $lc -replace '\{\{PWSH_PATH\}\}', ($pwshJsonPath -replace '\\', '\\')
+        $lc = $lc -replace '\{\{PWSH_PATH\}\}', $pwshJsonPath
         Set-Content $localSet -Value $lc -Encoding UTF8
         Log-OK "settings.local.json 已渲染"
     }
diff --git a/diagnose-tooluse.js b/diagnose-tooluse.js
new file mode 100644
index 0000000..ceadca4
--- /dev/null
+++ b/diagnose-tooluse.js
@@ -0,0 +1,179 @@
+#!/usr/bin/env node
+/**
+ * Bookworm tool_use 诊断脚本
+ * 测试中转站是否正确透传 Anthropic tool_use 协议
+ * 用法: node diagnose-tooluse.js
+ */
+const https = require('https');
+const http = require('http');
+
+const API_KEY = process.env.ANTHROPIC_API_KEY;
+const BASE_URL = process.env.ANTHROPIC_BASE_URL || 'https://api.anthropic.com';
+
+if (!API_KEY) {
+  console.error('[FAIL] ANTHROPIC_API_KEY 未设置');
+  process.exit(1);
+}
+
+console.log(`[INFO] 中转站: ${BASE_URL}`);
+console.log(`[INFO] API Key: ${API_KEY.substring(0, 8)}...`);
+console.log('');
+
+// 测试 1: 非流式 tool_use
+async function testToolUse() {
+  const url = new URL('/v1/messages', BASE_URL);
+  const isHttps = url.protocol === 'https:';
+  const lib = isHttps ? https : http;
+
+  const body = JSON.stringify({
+    model: 'claude-sonnet-4-20250514',
+    max_tokens: 200,
+    tools: [{
+      name: 'get_disk_info',
+      description: 'Get disk space information',
+      input_schema: {
+        type: 'object',
+        properties: { drive: { type: 'string', description: 'Drive letter' } },
+        required: ['drive']
+      }
+    }],
+    tool_choice: { type: 'tool', name: 'get_disk_info' },
+    messages: [{ role: 'user', content: 'Check disk C:' }]
+  });
+
+  return new Promise((resolve, reject) => {
+    const req = lib.request(url, {
+      method: 'POST',
+      headers: {
+        'Content-Type': 'application/json',
+        'x-api-key': API_KEY,
+        'anthropic-version': '2023-06-01'
+      }
+    }, (res) => {
+      let data = '';
+      res.on('data', chunk => data += chunk);
+      res.on('end', () => {
+        try {
+          const json = JSON.parse(data);
+          resolve({ status: res.statusCode, body: json });
+        } catch (e) {
+          resolve({ status: res.statusCode, raw: data.substring(0, 500) });
+        }
+      });
+    });
+    req.on('error', reject);
+    req.setTimeout(30000, () => { req.destroy(); reject(new Error('timeout')); });
+    req.write(body);
+    req.end();
+  });
+}
+
+// 测试 2: 流式 tool_use
+async function testStreamToolUse() {
+  const url = new URL('/v1/messages', BASE_URL);
+  const isHttps = url.protocol === 'https:';
+  const lib = isHttps ? https : http;
+
+  const body = JSON.stringify({
+    model: 'claude-sonnet-4-20250514',
+    max_tokens: 200,
+    stream: true,
+    tools: [{
+      name: 'get_disk_info',
+      description: 'Get disk space information',
+      input_schema: {
+        type: 'object',
+        properties: { drive: { type: 'string', description: 'Drive letter' } },
+        required: ['drive']
+      }
+    }],
+    tool_choice: { type: 'tool', name: 'get_disk_info' },
+    messages: [{ role: 'user', content: 'Check disk C:' }]
+  });
+
+  return new Promise((resolve, reject) => {
+    const req = lib.request(url, {
+      method: 'POST',
+      headers: {
+        'Content-Type': 'application/json',
+        'x-api-key': API_KEY,
+        'anthropic-version': '2023-06-01'
+      }
+    }, (res) => {
+      let data = '';
+      let hasToolUseStart = false;
+      let hasInputJsonDelta = false;
+
+      res.on('data', chunk => {
+        const text = chunk.toString();
+        data += text;
+        if (text.includes('"type":"tool_use"') || text.includes('"type": "tool_use"')) hasToolUseStart = true;
+        if (text.includes('input_json_delta')) hasInputJsonDelta = true;
+      });
+      res.on('end', () => {
+        resolve({
+          status: res.statusCode,
+          hasToolUseStart,
+          hasInputJsonDelta,
+          sample: data.substring(0, 800)
+        });
+      });
+    });
+    req.on('error', reject);
+    req.setTimeout(30000, () => { req.destroy(); reject(new Error('timeout')); });
+    req.write(body);
+    req.end();
+  });
+}
+
+(async () => {
+  // 测试 1: 非流式
+  console.log('=== 测试 1: 非流式 tool_use ===');
+  try {
+    const r = await testToolUse();
+    if (r.status !== 200) {
+      console.log(`[FAIL] HTTP ${r.status}`);
+      console.log(JSON.stringify(r.body || r.raw, null, 2).substring(0, 300));
+    } else {
+      const content = r.body?.content || [];
+      const toolUseBlock = content.find(b => b.type === 'tool_use');
+      if (toolUseBlock) {
+        console.log(`[PASS] 收到 tool_use block: name=${toolUseBlock.name}, id=${toolUseBlock.id}`);
+        console.log(`       input: ${JSON.stringify(toolUseBlock.input)}`);
+      } else {
+        console.log('[FAIL] 未收到 tool_use block!');
+        console.log('  content types:', content.map(b => b.type).join(', ') || '(empty)');
+        console.log('  stop_reason:', r.body?.stop_reason);
+        if (content[0]?.text) console.log('  text:', content[0].text.substring(0, 200));
+      }
+    }
+  } catch (e) {
+    console.log(`[FAIL] 请求失败: ${e.message}`);
+  }
+
+  console.log('');
+
+  // 测试 2: 流式
+  console.log('=== 测试 2: 流式 tool_use (Claude Code 实际使用模式) ===');
+  try {
+    const r = await testStreamToolUse();
+    if (r.status !== 200) {
+      console.log(`[FAIL] HTTP ${r.status}`);
+      console.log(r.sample?.substring(0, 300));
+    } else {
+      console.log(`  tool_use block in stream: ${r.hasToolUseStart ? '[PASS]' : '[FAIL]'}`);
+      console.log(`  input_json_delta events: ${r.hasInputJsonDelta ? '[PASS]' : '[FAIL]'}`);
+      if (!r.hasToolUseStart) {
+        console.log('  stream sample:', r.sample?.substring(0, 400));
+      }
+    }
+  } catch (e) {
+    console.log(`[FAIL] 请求失败: ${e.message}`);
+  }
+
+  console.log('');
+  console.log('=== 诊断结论 ===');
+  console.log('如果两项测试均 PASS: 中转站 tool_use 正常');
+  console.log('如果非流式 PASS 流式 FAIL: 中转站流式 SSE 处理有 bug, 联系管理员升级 NewAPI');
+  console.log('如果均 FAIL: 中转站不支持 Anthropic tool_use, 需开启原生 Anthropic 透传模式');
+})();