claw-code 동등 품질 4단계 연속 반영: Agentic 루프/상태복원/설정연동/릴리즈 게이트 정렬

- 도구 동등화: task/todo/tool-search + plan/worktree/team/cron 도구군 추가 및 ToolRegistry 등록\n- claw-code CamelCase 별칭 정규화 확장: EnterPlanMode/EnterWorktree/TeamCreate/CronCreate 등 -> 내부 snake_case 매핑\n- AgentLoop 런타임 강화: Code 탭 전용 도구 토글(CodeSettings) 반영, 비활성 도구 자동 차단\n- Worktree 상태 복원 연결: .ax/worktree_state.json 기반 루트 탐색/활성 worktree 복원 및 BuildContext 연동\n- 권한/플러그인 하드닝 기존 반영분 유지: target 기반 권한 판정 + internal 모드 플러그인 경로/manifest 검증\n- 설정 연동(UI): SettingsWindow Code 패널에 Plan/Worktree/Team/Cron 도구 on/off 토글 추가\n- 테스트 보강: AgentParityTools/AgentLoopE2E에 worktree 지속성, alias 정규화, 설정 차단 시나리오 추가\n- 검증 완료: dotnet build(경고0/오류0), ParityBenchmark 11/11, ReplayStability 12/12, 전체 371/371, release-gate 통과\n- 문서 동기화: AGENT_ROADMAP/NEXT_ROADMAP/CLAW_CODE_PARITY_PLAN 수치 및 기준 최신화

src/AxCopilot/Services/Agent/TaskUpdateTool.cs

@@ -0,0 +1,70 @@
+using System.IO;
+using System.Linq;
+using System.Text.Json;
+
+namespace AxCopilot.Services.Agent;
+
+public sealed class TaskUpdateTool : IAgentTool
+{
+    public string Name => "task_update";
+
+    public string Description =>
+        "Update task fields (status/title/description/priority) in the workspace task board.";
+
+    public ToolParameterSchema Parameters => new()
+    {
+        Properties = new()
+        {
+            ["id"] = new() { Type = "integer", Description = "Task id" },
+            ["status"] = new() { Type = "string", Description = "open | in_progress | blocked | done | stopped" },
+            ["title"] = new() { Type = "string", Description = "New title (optional)" },
+            ["description"] = new() { Type = "string", Description = "New description (optional)" },
+            ["priority"] = new() { Type = "string", Description = "high | medium | low" },
+        },
+        Required = ["id"]
+    };
+
+    public Task<ToolResult> ExecuteAsync(JsonElement args, AgentContext context, CancellationToken ct = default)
+    {
+        if (!args.TryGetProperty("id", out var idEl))
+            return Task.FromResult(ToolResult.Fail("id is required."));
+        if (string.IsNullOrWhiteSpace(context.WorkFolder) || !Directory.Exists(context.WorkFolder))
+            return Task.FromResult(ToolResult.Fail("valid WorkFolder is required."));
+
+        var id = idEl.GetInt32();
+        var tasks = TaskBoardStore.Load(context.WorkFolder);
+        var task = tasks.FirstOrDefault(t => t.Id == id);
+        if (task == null)
+            return Task.FromResult(ToolResult.Fail($"Task #{id} not found."));
+
+        if (args.TryGetProperty("status", out var statusEl))
+        {
+            var status = (statusEl.GetString() ?? "").Trim().ToLowerInvariant();
+            if (!TaskBoardStore.IsValidStatus(status))
+                return Task.FromResult(ToolResult.Fail("Invalid status."));
+            task.Status = status;
+        }
+
+        if (args.TryGetProperty("title", out var titleEl))
+        {
+            var title = (titleEl.GetString() ?? "").Trim();
+            if (!string.IsNullOrWhiteSpace(title))
+                task.Title = title;
+        }
+
+        if (args.TryGetProperty("description", out var descEl))
+            task.Description = (descEl.GetString() ?? "").Trim();
+
+        if (args.TryGetProperty("priority", out var priEl))
+        {
+            var priority = (priEl.GetString() ?? "").Trim().ToLowerInvariant();
+            if (!TaskBoardStore.IsValidPriority(priority))
+                return Task.FromResult(ToolResult.Fail("Invalid priority."));
+            task.Priority = priority;
+        }
+
+        task.UpdatedAt = DateTime.Now;
+        TaskBoardStore.Save(context.WorkFolder, tasks);
+        return Task.FromResult(ToolResult.Ok($"Updated task #{task.Id}: [{task.Status}] {task.Title}"));
+    }
+}