What problem does it solve? Starting feature work directly in your main checkout risks polluting your current branch and mixing unrelated changes. This Skill ensures every implementation task begins in an isolated workspace, with dependencies installed and a clean test baseline verified before any code changes happen. ## Core Features & Use Cases - Isolation Detection: Detects whether you are already inside a linked worktree or a git submodule before creating anything, preventing nested worktrees. - Native Tool Preference with Git Fallback: Uses platform-native worktree tools (like EnterWorktree) when available, falling back to manual git worktree add only when no native tool exists. - Safe Directory Selection: Follows a priority order for worktree placement (existing .worktrees/, legacy global path, declared preference, default) and verifies the directory is git-ignored before creation. - Use Case: Before implementing a new feature, the Skill sets up .worktrees/feature-x, runs npm install, executes the test suite to confirm a clean baseline, and reports the workspace is ready. ## Quick Start Set up an isolated git worktree for my new feature branch and verify the project tests pass before I start implementing.