feat: 工具层及 mcp 大重构 (#252)

* feat: 第一版大重构

* fix: 修复类型问题

* chore: 更新版本到 1.3.2

* Add brave as alternative WebSearchTool

* fix: 修正顺序

* fix: 修复对穷鬼模式的 auto dream 和 session memory 越过

* feat: 穷鬼模式去除 session-summary

* feat: 创建 builtin-tools 包，搬运所有工具实现

将 src/tools/ 下的全部 60 个工具目录迁移至 packages/builtin-tools/src/tools/，
内部导入路径已更新为 src/ alias 模式。

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

* refactor: 更新 src/ 中所有工具引用至 builtin-tools 包，删除 src/tools/

- src/tools.ts 及 178 个 src/ 文件的 import 路径从 ./tools/ 改为 builtin-tools/tools/
- 删除 src/tools/ 整个目录（已迁移至 packages/builtin-tools/）

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

* chore: 添加 builtin-tools 路径别名至 tsconfig，更新 bun.lock

- tsconfig.json 新增 builtin-tools/* 和 builtin-tools 路径映射
- 新增 packages/builtin-tools/src 至 include

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

* refactor: 为 builtin-tools、mcp-client、agent-tools 添加 @claude-code-best 作用域前缀

所有包名及 import 路径统一添加 @claude-code-best/ 前缀：
- builtin-tools → @claude-code-best/builtin-tools
- mcp-client → @claude-code-best/mcp-client
- agent-tools → @claude-code-best/agent-tools

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

* fix: 修复 node 环境没有 bun 的问题

---------

Co-authored-by: Eric-Guo <eric.guocz@gmail.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

packages/builtin-tools/src/tools/WorkflowTool/WorkflowTool.ts

@@ -0,0 +1,74 @@
+import { z } from 'zod/v4'
+import type { ToolResultBlockParam } from 'src/Tool.js'
+import { buildTool } from 'src/Tool.js'
+import { truncate } from 'src/utils/format.js'
+import { WORKFLOW_TOOL_NAME } from './constants.js'
+
+const inputSchema = z.object({
+  workflow: z.string().describe('Name of the workflow to execute'),
+  args: z.string().optional().describe('Arguments to pass to the workflow'),
+})
+type Input = typeof inputSchema
+type WorkflowInput = z.infer<Input>
+
+type WorkflowOutput = { output: string }
+
+export const WorkflowTool = buildTool({
+  name: WORKFLOW_TOOL_NAME,
+  searchHint: 'execute user-defined workflow scripts',
+  maxResultSizeChars: 50_000,
+  strict: true,
+
+  inputSchema,
+
+  async description() {
+    return 'Execute a user-defined workflow script from .claude/workflows/'
+  },
+  async prompt() {
+    return `Use the Workflow tool to execute user-defined workflow scripts located in .claude/workflows/. Workflows are YAML or Markdown files that define a sequence of steps for common development tasks.
+
+Guidelines:
+- Specify the workflow name to execute (must match a file in .claude/workflows/)
+- Optionally pass arguments that the workflow can use
+- Workflows run in the context of the current project`
+  },
+  userFacingName() {
+    return 'Workflow'
+  },
+  isReadOnly() {
+    return false
+  },
+  isEnabled() {
+    return true
+  },
+
+  renderToolUseMessage(input: Partial<WorkflowInput>) {
+    const name = input.workflow ?? 'unknown'
+    if (input.args) {
+      return `Workflow: ${name} ${input.args}`
+    }
+    return `Workflow: ${name}`
+  },
+
+  mapToolResultToToolResultBlockParam(
+    content: WorkflowOutput,
+    toolUseID: string,
+  ): ToolResultBlockParam {
+    return {
+      tool_use_id: toolUseID,
+      type: 'tool_result',
+      content: truncate(content.output, 50_000),
+    }
+  },
+
+  async call(_input: WorkflowInput, _context, _progress) {
+    // Workflow execution is wired by the WORKFLOW_SCRIPTS feature bootstrap.
+    // Without it, this tool is not functional.
+    return {
+      data: {
+        output:
+          'Error: Workflow execution requires the WORKFLOW_SCRIPTS runtime.',
+      },
+    }
+  },
+})