Initial commit to new repository

src/AxCopilot/Services/Agent/FileWriteTool.cs

@@ -0,0 +1,46 @@
+using System.IO;
+using System.Text.Json;
+
+namespace AxCopilot.Services.Agent;
+
+/// <summary>파일 전체를 새로 쓰는 도구. 새 파일 생성 또는 기존 파일 덮어쓰기.</summary>
+public class FileWriteTool : IAgentTool
+{
+    public string Name => "file_write";
+    public string Description => "Write content to a file. Creates new file or overwrites existing. Parent directories are created automatically.";
+
+    public ToolParameterSchema Parameters => new()
+    {
+        Properties = new()
+        {
+            ["path"] = new() { Type = "string", Description = "File path to write (absolute or relative to work folder)" },
+            ["content"] = new() { Type = "string", Description = "Content to write to the file" },
+        },
+        Required = ["path", "content"]
+    };
+
+    public async Task<ToolResult> ExecuteAsync(JsonElement args, AgentContext context, CancellationToken ct)
+    {
+        var path = args.GetProperty("path").GetString() ?? "";
+        var content = args.GetProperty("content").GetString() ?? "";
+
+        var fullPath = FileReadTool.ResolvePath(path, context.WorkFolder);
+
+        if (!context.IsPathAllowed(fullPath))
+            return ToolResult.Fail($"경로 접근 차단: {fullPath}");
+
+        if (!await context.CheckWritePermissionAsync(Name, fullPath))
+            return ToolResult.Fail($"쓰기 권한 거부: {fullPath}");
+
+        try
+        {
+            await TextFileCodec.WriteAllTextAsync(fullPath, content, TextFileCodec.Utf8NoBom, ct);
+            var lines = content.Split('\n').Length;
+            return ToolResult.Ok($"파일 저장 완료: {fullPath} ({lines} lines, {content.Length} chars)", fullPath);
+        }
+        catch (Exception ex)
+        {
+            return ToolResult.Fail($"파일 쓰기 실패: {ex.Message}");
+        }
+    }
+}