[FEATURE]

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Problem

Claude Code silently enrolled me in a worktree mode experiment
(tengu_worktree_mode via cachedGrowthBookFeatures) without any
notification or opt-in. This changed core behavior — Claude started
creating git worktrees for every task — resulting in 6 stale worktrees
piling up in my repo without my knowledge.

I only discovered this when I asked Claude to explain why it was
creating worktrees.

Impact

• Stale worktrees accumulating silently
• Unexpected repo state changes
• No way to opt out without manually editing ~/.claude/settings.json

(which gets overwritten on next sync anyway)

Request

1. Show a visible notice when a behavior-changing experiment is activated
2. Provide a documented, stable opt-out mechanism for experiments

(not just cachedGrowthBookFeatures which is ephemeral)

1. Behavior-changing flags like worktree mode should be opt-IN,

not silently rolled out

Environment

• Solo developer workflow
• Worktree isolation adds complexity without benefit for single-developer repos

Proposed Solution

Request

1. Show a visible notice when a behavior-changing experiment is activated
2. Provide a documented, stable opt-out mechanism for experiments

(not just cachedGrowthBookFeatures which is ephemeral)

1. Behavior-changing flags like worktree mode should be opt-IN,

not silently rolled out

Alternative Solutions

_No response_

Priority

High - Significant impact on productivity

Feature Category

Interactive mode (TUI)

Use Case Example

_No response_

Additional Context

_No response_