[Feature Request] User setting to control worktree toggle default

Summary

The "worktree" toggle in the Claude Code desktop app's chat input bar defaults to ON for every new chat. There's no user-accessible setting to change this default, creating repeated friction for users who prefer direct-branch workflows.

Environment

• Claude Code desktop app on Windows 11
• Anthropic Max plan
• Workflow: solo developer, local-first, direct-push on a monorepo

Current Behaviour

Every new chat session opens with the worktree toggle checked. Must be manually unchecked per session.

Investigation

Found tengu_worktree_mode flag in ~/.claude.json. Editing it to false gets auto-reverted by the app on next write — confirming it's server/cache-managed rather than user-configurable. No equivalent setting exists in ~/.claude/settings.json or project-level .claude/settings.local.json.

Requested Feature

A user setting at user or project scope, e.g.:

{
  "ui": {
    "worktreeDefault": false
  }
}

Or equivalent. Ideally also respects the user's last-used toggle state within a project as a sticky preference.

Use Case

Solo developer with a local-first workflow. Worktrees are unnecessary — they create ephemeral claude/* local branches that add visual noise to git branch output even though they never reach the remote. Direct operation on the checked-out branch matches the mental model better.

Additional Notes

Worktree branches are local-only (not pushed to origin), so this is purely a user-preference / UI-default issue, not a workflow-correctness issue. The feature is useful and should remain available — just not be the default for everyone.

Thanks for considering!