Add configurable worktree root directory setting

Users can now configure where worktrees are stored via the settings modal. The setting is persisted and applies to all new sessions created after the change.

Changes:
- Added worktreeDir field to TerminalSettings interface
- Added UI controls in settings modal for selecting worktree directory
- Updated worktree creation logic to use configured directory
- Defaults to ~/worktrees for backward compatibility

Author: built-by-as

index.html

@@ -225,6 +225,15 @@ <h2 class="modal-title">Terminal Settings</h2>
           </label>
         </div>
 
+        <div class="form-group">
+          <label class="form-label">Worktree Root Directory</label>
+          <div class="directory-input-group">
+            <input type="text" id="settings-worktree-dir" class="form-input" readonly placeholder="~/worktrees" />
+            <button id="browse-worktree-dir" class="btn-icon">Browse</button>
+          </div>
+          <span class="text-xs text-gray-400 mt-1 block">Directory where session worktrees will be stored</span>
+        </div>
+
         <div class="btn-group">
           <button id="cancel-settings" class="btn-secondary">Cancel</button>
           <button id="reset-settings" class="btn-secondary">Reset to Default</button>

main.ts

@@ -22,6 +22,14 @@ function getPersistedSessions(): PersistedSession[] {
   return (store as any).get("sessions", []);
 }
 
+function getWorktreeBaseDir(): string {
+  const settings = (store as any).get("terminalSettings");
+  if (settings && settings.worktreeDir) {
+    return settings.worktreeDir;
+  }
+  return path.join(os.homedir(), "worktrees");
+}
+
 function isTerminalReady(buffer: string, startPos: number = 0): boolean {
   const searchBuffer = buffer.slice(startPos);
 
@@ -63,7 +71,7 @@ function extractProjectMcpConfig(projectDir: string): any {
 // Get a safe directory name from project path, with collision handling
 function getProjectWorktreeDirName(projectDir: string): string {
   const baseName = path.basename(projectDir);
-  const worktreesBaseDir = path.join(os.homedir(), "worktrees");
+  const worktreesBaseDir = getWorktreeBaseDir();
   const candidatePath = path.join(worktreesBaseDir, baseName);
 
   // If directory doesn't exist or points to the same project, use base name
@@ -90,7 +98,7 @@ function getProjectWorktreeDirName(projectDir: string): string {
 function writeMcpConfigFile(projectDir: string, mcpServers: any): string | null {
   try {
     const projectDirName = getProjectWorktreeDirName(projectDir);
-    const worktreesDir = path.join(os.homedir(), "worktrees");
+    const worktreesDir = getWorktreeBaseDir();
     if (!fs.existsSync(worktreesDir)) {
       fs.mkdirSync(worktreesDir, { recursive: true });
     }
@@ -303,7 +311,7 @@ async function createWorktree(projectDir: string, parentBranch: string, sessionN
   const git = simpleGit(projectDir);
 
   const projectDirName = getProjectWorktreeDirName(projectDir);
-  const worktreesBaseDir = path.join(os.homedir(), "worktrees");
+  const worktreesBaseDir = getWorktreeBaseDir();
   const projectWorktreeDir = path.join(worktreesBaseDir, projectDirName);
   const worktreeName = customBranchName || `session${sessionNumber}`;
   const worktreePath = path.join(projectWorktreeDir, worktreeName);

renderer.ts

@@ -30,6 +30,7 @@ interface TerminalSettings {
   fontSize: number;
   theme: string; // Theme preset name
   cursorBlink: boolean;
+  worktreeDir: string;
 }
 
 interface ThemeColors {
@@ -203,6 +204,7 @@ const DEFAULT_SETTINGS: TerminalSettings = {
   fontSize: 11,
   theme: getSystemTheme() === "dark" ? "macos-dark" : "macos-light",
   cursorBlink: false,
+  worktreeDir: require("path").join(require("os").homedir(), "worktrees"),
 };
 
 const sessions = new Map<string, Session>();
@@ -1217,6 +1219,8 @@ const settingsTheme = document.getElementById("settings-theme") as HTMLSelectEle
 const settingsFontFamily = document.getElementById("settings-font-family") as HTMLSelectElement;
 const settingsFontSize = document.getElementById("settings-font-size") as HTMLInputElement;
 const settingsCursorBlink = document.getElementById("settings-cursor-blink") as HTMLInputElement;
+const settingsWorktreeDir = document.getElementById("settings-worktree-dir") as HTMLInputElement;
+const browseWorktreeDirBtn = document.getElementById("browse-worktree-dir");
 
 // Load saved settings on startup
 async function loadSettings() {
@@ -1243,6 +1247,7 @@ function populateSettingsForm() {
 
   settingsFontSize.value = terminalSettings.fontSize.toString();
   settingsCursorBlink.checked = terminalSettings.cursorBlink;
+  settingsWorktreeDir.value = terminalSettings.worktreeDir;
 }
 
 // Apply settings to all existing terminals
@@ -1281,13 +1286,22 @@ resetSettingsBtn?.addEventListener("click", () => {
   populateSettingsForm();
 });
 
+// Browse worktree directory
+browseWorktreeDirBtn?.addEventListener("click", async () => {
+  const dir = await ipcRenderer.invoke("select-directory");
+  if (dir) {
+    settingsWorktreeDir.value = dir;
+  }
+});
+
 // Save settings
 saveSettingsBtn?.addEventListener("click", async () => {
   // Read values from form
   terminalSettings.theme = settingsTheme.value;
   terminalSettings.fontFamily = settingsFontFamily.value || DEFAULT_SETTINGS.fontFamily;
   terminalSettings.fontSize = parseInt(settingsFontSize.value) || DEFAULT_SETTINGS.fontSize;
   terminalSettings.cursorBlink = settingsCursorBlink.checked;
+  terminalSettings.worktreeDir = settingsWorktreeDir.value || DEFAULT_SETTINGS.worktreeDir;
 
   // Save to electron-store
   await ipcRenderer.invoke("save-terminal-settings", terminalSettings);