清理 main.go 模板代码并补充 README 文档

- 移除 main.go 中的 GoLand 自动生成模板代码，替换为项目实际入口
- 补充空的 README.md，添加项目说明、架构图、模块表和快速开始指南

main.go

@@ -1,21 +1,59 @@
 package main
 
 import (
-	"fmt"
+	"context"
+	"log"
+	"os"
+
+	"go-tiny-claw/internal/engine"
+	"go-tiny-claw/internal/schema"
 )
 
-//TIP <p>To run your code, right-click the code and select <b>Run</b>.</p> <p>Alternatively, click
-// the <icon src="AllIcons.Actions.Execute"/> icon in the gutter and select the <b>Run</b> menu item from here.</p>
+// mockProvider 模拟大模型推理
+type mockProvider struct {
+	turn int
+}
 
-func main() {
-	//TIP <p>Press <shortcut actionId="ShowIntentionActions"/> when your caret is at the underlined text
-	// to see how GoLand suggests fixing the warning.</p><p>Alternatively, if available, click the lightbulb to view possible fixes.</p>
-	s := "gopher"
-	fmt.Printf("Hello and welcome, %s!\n", s)
+func (m *mockProvider) Generate(ctx context.Context, msgs []schema.Message, _ []schema.ToolDefinition) (*schema.Message, error) {
+	m.turn++
+	if m.turn == 1 {
+		return &schema.Message{
+			Role:    schema.RoleAssistant,
+			Content: "让我来看看当前目录下有什么文件。",
+			ToolCalls: []schema.ToolCall{
+				{ID: "call_123", Name: "bash", Arguments: []byte(`{"command": "ls -la"}`)},
+			},
+		}, nil
+	}
+	return &schema.Message{
+		Role:    schema.RoleAssistant,
+		Content: "我看到了文件列表，里面包含 main.go，任务完成！",
+	}, nil
+}
 
-	for i := 1; i <= 5; i++ {
-		//TIP <p>To start your debugging session, right-click your code in the editor and select the Debug option.</p> <p>We have set one <icon src="AllIcons.Debugger.Db_set_breakpoint"/> breakpoint
-		// for you, but you can always add more by pressing <shortcut actionId="ToggleLineBreakpoint"/>.</p>
-		fmt.Println("i =", 100/i)
+// mockRegistry 模拟工具执行
+type mockRegistry struct{}
+
+func (m *mockRegistry) GetAvailableTools() []schema.ToolDefinition { return nil }
+
+func (m *mockRegistry) Execute(ctx context.Context, call schema.ToolCall) schema.ToolResult {
+	return schema.ToolResult{
+		ToolCallID: call.ID,
+		Output:     "-rw-r--r--  1 user group  234 Oct 24 10:00 main.go\n",
+		IsError:    false,
+	}
+}
+
+func main() {
+	workDir, _ := os.Getwd()
+
+	p := &mockProvider{}
+	r := &mockRegistry{}
+
+	eng := engine.NewAgentEngine(p, r, workDir)
+
+	err := eng.Run(context.Background(), "帮我检查当前目录的文件")
+	if err != nil {
+		log.Fatalf("引擎崩溃: %v", err)
 	}
 }