diff --git a/src/function/index.ts b/src/function/index.ts
index 97c4ff1..b29f38c 100644
--- a/src/function/index.ts
+++ b/src/function/index.ts
@@ -46,7 +46,6 @@ function registerTreeView(context: vscode.ExtensionContext) {
     vscode.commands.registerCommand('digital-ide.treeView.arch.collapse', treeView.collapseTreeView);
     vscode.commands.registerCommand('digital-ide.treeView.arch.refresh', treeView.refreshArchTree);
     vscode.commands.registerCommand('digital-ide.treeView.arch.openFile', treeView.openFileByUri);
-
 }
 
 
diff --git a/src/function/treeView/command.ts b/src/function/treeView/command.ts
index fbe310f..9dc9ba4 100644
--- a/src/function/treeView/command.ts
+++ b/src/function/treeView/command.ts
@@ -1,6 +1,9 @@
 /* eslint-disable @typescript-eslint/naming-convention */
 import * as vscode from 'vscode';
+import { MainOutput, opeParam } from '../../global';
+import { hdlDir, hdlFile, hdlPath } from '../../hdlFs';
 import { getIconConfig } from '../../hdlFs/icons';
+import { hdlIgnore } from '../../manager/ignore';
 
 interface CommandDataItem {
     name: string,
@@ -186,6 +189,30 @@ class ToolTreeProvider extends BaseCommandTreeProvider {
             }
         };
         super(config, 'TOOL');
+
+        vscode.commands.registerCommand('digital-ide.tool.clean', this.clean);
+    }
+
+    public async clean() {
+        const prjPath = opeParam.prjInfo.arch.prjPath;
+        const xilFolder = hdlPath.join(opeParam.workspacePath, '.Xil');
+
+        hdlDir.rmdir(prjPath);
+        hdlDir.rmdir(xilFolder);
+
+        const ignores = hdlIgnore.getIgnoreFiles();
+
+        const strFiles = hdlFile.pickFileRecursive(opeParam.workspacePath, ignores, p => p.endsWith('.str'));
+        for (const path of strFiles) {
+            hdlFile.removeFile(path);
+        }
+
+        const logFiles = hdlFile.pickFileRecursive(opeParam.workspacePath, ignores, p => p.endsWith('.log'));
+        for (const path of logFiles) {
+            hdlFile.readFile(path);
+        }
+
+        MainOutput.report('finish digital-ide.tool.clean');
     }
 }
 
diff --git a/src/manager/prj.ts b/src/manager/prj.ts
index 2d38a69..b9ea168 100644
--- a/src/manager/prj.ts
+++ b/src/manager/prj.ts
@@ -11,6 +11,8 @@ import { hdlParam } from '../hdlParser';
 import { PlManage } from './PL';
 import { PsManage } from './PS';
 import { hdlIgnore } from './ignore';
+import { ppyAction } from '../monitor/event';
+import { hdlMonitor } from '../monitor';
 
 class PrjManage {
     pl?: PlManage;
@@ -23,8 +25,11 @@ class PrjManage {
             return;
         }
         const template = hdlFile.readJSON(opeParam.propertyInitPath) as RawPrjInfo;
-
         hdlFile.writeJSON(opeParam.propertyJsonPath, template);
+
+        // TODO : this is a bug, that monitor cannot sense the add event of ppy
+        // so we need to do <add event> manually here
+        await ppyAction.add(opeParam.propertyJsonPath, hdlMonitor);
     }
 
     // overwrite content in current property.json to property-init.json
diff --git a/src/monitor/event.ts b/src/monitor/event.ts
index 2148b8b..23a92b5 100644
--- a/src/monitor/event.ts
+++ b/src/monitor/event.ts
@@ -200,11 +200,27 @@ class PpyAction extends BaseAction {
         const rawPrjInfo = opeParam.getRawUserPrjInfo();
         // when delete, make ws path to be main parse path
         if (e === Event.Unlink) {
+            console.log('unlink ppy, PrjInfoDefaults.arch:', PrjInfoDefaults.arch);
+            
             rawPrjInfo.arch = PrjInfoDefaults.arch;
         }
 
         opeParam.mergePrjInfo(rawPrjInfo);
         
+        // // when delete, make ws path to be main parse path
+        // if (e === Event.Unlink) {
+        //     const prjInfoArch = opeParam.prjInfo.arch;
+        //     const workspacePath = opeParam.workspacePath;
+
+        //     // TODO : more elegant ?
+        //     prjInfoArch.hardware.src = workspacePath;
+        //     prjInfoArch.hardware.sim = workspacePath;
+        //     prjInfoArch.hardware.data = workspacePath;
+        //     prjInfoArch.prjPath = workspacePath;
+        //     prjInfoArch.software.data = workspacePath;
+        //     prjInfoArch.software.src = workspacePath;
+        // }
+
         const currentPathSet = this.getImportantPathSet();
         const currentLibState = opeParam.prjInfo.library.state;
             
diff --git a/src/monitor/index.ts b/src/monitor/index.ts
index 470e80d..8d21dc3 100644
--- a/src/monitor/index.ts
+++ b/src/monitor/index.ts
@@ -81,6 +81,14 @@ class HdlMonitor{
         }
     }
 
+    public remakePpyMonitor() {
+        if (this.ppyMonitor) {
+            this.ppyMonitor.close();
+            this.ppyMonitor = this.getPpyMonitor();
+            this.registerPpyMonitorListener();
+        }
+    }
+
     public registerHdlMonitorListener() {
         Event.hdlAction.listenAdd(this);
         Event.hdlAction.listenChange(this);
diff --git a/src/test/manager/.vscode/property.json b/src/test/manager/.vscode/property.json
new file mode 100644
index 0000000..7dc2beb
--- /dev/null
+++ b/src/test/manager/.vscode/property.json
@@ -0,0 +1,11 @@
+{
+	"toolChain": "xilinx",
+	"prjName": {
+		"PL": "template"
+	},
+	"soc": {
+		"core": "none"
+	},
+	"enableShowLog": false,
+	"device": "none"
+}
\ No newline at end of file