diff --git a/package-lock.json b/package-lock.json
index e5e7941..6ec3ee3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "rspec-focus",
-  "version": "0.3.1",
+  "version": "0.4.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "rspec-focus",
-      "version": "0.3.1",
+      "version": "0.4.0",
       "license": "MIT",
       "devDependencies": {
         "@eslint/compat": "^2.0.2",
diff --git a/package.json b/package.json
index 6b768d4..53edfdd 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "rspec-focus",
   "displayName": "RSpec Focus",
   "description": "Add and clear focus mode in RSpec files",
-  "version": "0.3.1",
+  "version": "0.4.0",
   "license": "MIT",
   "publisher": "asux",
   "icon": "rspec.png",
@@ -33,8 +33,18 @@
   "activationEvents": [
     "onLanguage:ruby"
   ],
-  "main": "./out/src/rspec-focus",
+  "main": "./out/src/extension",
   "contributes": {
+    "configuration": {
+      "title": "RSpec Focus",
+      "properties": {
+        "rspec-focus.focusTag": {
+          "type": "string",
+          "default": "focus",
+          "description": "RSpec tag used for focus (e.g. focus, wip). Inserted as :tag in examples."
+        }
+      }
+    },
     "commands": [
       {
         "command": "rspec-focus.add",
diff --git a/src/rspec-focus.ts b/src/extension.ts
similarity index 82%
rename from src/rspec-focus.ts
rename to src/extension.ts
index 253b24b..8468b66 100644
--- a/src/rspec-focus.ts
+++ b/src/extension.ts
@@ -42,7 +42,13 @@ const KEYWORDS = [
   'it_should_behave_like'
 ];
 
-const FOCUS_TAG = ', :focus';
+const DEFAULT_FOCUS_TAG = 'focus';
+
+function getFocusTag(): string {
+  const raw = vscode.workspace.getConfiguration('rspec-focus').get<string>('focusTag', DEFAULT_FOCUS_TAG);
+  const sanitized = (raw ?? '').replace(/^:+/, '').replace(/[^a-zA-Z0-9_].*$/, '') || DEFAULT_FOCUS_TAG;
+  return `, :${sanitized}`;
+}
 
 function getKeywordsRegexp(): RegExp {
   return new RegExp(`(?:${KEYWORDS.join('|')})\\s['"].+['"]\\sdo$`, 'm');
@@ -58,6 +64,7 @@ async function add() {
     return;
   }
 
+  const focusTag = getFocusTag();
   await editor.edit((editBuilder) => {
     const activePosition = editor.selection.active;
     for (let i = activePosition.line; i >= 0; i--) {
@@ -66,13 +73,13 @@ async function add() {
       const matches = text.match(getKeywordsRegexp()) || text.match(getRSpecBlockRegexp());
 
       if (matches) {
-        if (text.includes(FOCUS_TAG)) {
+        if (text.includes(focusTag)) {
           continue;
         } else {
           const doIndex = text.lastIndexOf('do');
           if (doIndex !== -1) {
             const position = new Position(i, doIndex - 1);
-            editBuilder.insert(position, FOCUS_TAG);
+            editBuilder.insert(position, focusTag);
           }
           break;
         }
@@ -87,15 +94,16 @@ async function clear() {
     return;
   }
 
+  const focusTag = getFocusTag();
   await editor.edit((editBuilder) => {
     for (let i = 0; i < editor.document.lineCount; i++) {
       const line = editor.document.lineAt(i);
       const text = line.text;
-      const focusIndex = text.indexOf(FOCUS_TAG);
+      const focusIndex = text.indexOf(focusTag);
 
       if (focusIndex !== -1) {
         const start = new Position(i, focusIndex);
-        const end = new Position(i, focusIndex + FOCUS_TAG.length);
+        const end = new Position(i, focusIndex + focusTag.length);
         editBuilder.delete(new Range(start, end));
       }
     }
diff --git a/test/rspec-focus.test.ts b/test/extension.test.ts
similarity index 76%
rename from test/rspec-focus.test.ts
rename to test/extension.test.ts
index 25f5d69..04a7e0a 100644
--- a/test/rspec-focus.test.ts
+++ b/test/extension.test.ts
@@ -73,4 +73,24 @@ suite('RSpec Focus Functional Tests', () => {
     assert.strictEqual(editor.document.lineAt(0).text, "describe 'User' do");
     assert.strictEqual(editor.document.lineAt(1).text, "  it 'is valid' do");
   });
+
+  test('Uses configurable focus tag (e.g. wip)', async () => {
+    const config = vscode.workspace.getConfiguration('rspec-focus');
+    const original = config.get<string>('focusTag');
+    try {
+      await config.update('focusTag', 'wip', vscode.ConfigurationTarget.Global);
+
+      const content = "it 'work in progress' do\nend";
+      const editor = await setupEditor(content);
+      editor.selection = new vscode.Selection(new vscode.Position(0, 0), new vscode.Position(0, 0));
+
+      await vscode.commands.executeCommand('rspec-focus.add');
+      assert.strictEqual(editor.document.lineAt(0).text, "it 'work in progress', :wip do");
+
+      await vscode.commands.executeCommand('rspec-focus.clear');
+      assert.strictEqual(editor.document.lineAt(0).text, "it 'work in progress' do");
+    } finally {
+      await config.update('focusTag', original, vscode.ConfigurationTarget.Global);
+    }
+  });
 });