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 runs in an isolated workspace, detecting existing isolation first and falling back to git worktrees only when no native tool exists. ## Core Features & Use Cases - Isolation Detection: Checks whether you are already inside a linked worktree or a git submodule before creating anything, preventing nested worktrees. - Native Tool Preference: Uses platform-native worktree tools (e.g., EnterWorktree) when available, falling back to manual git worktree add only when necessary. - 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. - Baseline Verification: Auto-detects the project type (Node, Rust, Python, Go), installs dependencies, and runs tests to confirm a clean starting state. - Use Case: Before implementing a new payment feature, ask the assistant to set up an isolated workspace; it creates a worktree on a new branch, installs dependencies, and confirms all tests pass before coding begins. ## Quick Start Set up an isolated git worktree for my next feature branch and verify the test baseline is clean.