What problem does it solve? Setting up a newly created linked Git worktree for implementation often involves ad-hoc commands that risk corrupting Git state, skipping required preparation, or leaving partial effects untracked. This Skill defines a rigorous contract for preparing an already-selected worktree while preserving Git integrity. ## Core Features & Use Cases - Git Preservation Invariant: Proves HEAD, index, refs, and commit tree remain unchanged before and after every effect, rejecting the primary checkout and ambiguous roots. - Effect Envelopes and Censuses: Requires pre-authorized effect envelopes and complete pre/post censuses that attribute every filesystem, Git, and service delta to its owner and grant. - Deterministic Results: Produces exactly one environment result (environment-ready or environment-non-ready) with functional readiness evidence, blocker details, and recovery conditions. - Use Case: After create-worktree selects a linked worktree, an agent runs this Skill to install locked dependencies, initialize inputs, start required services, and hand back verified readiness evidence. ## Quick Start Ask the agent to prepare the selected linked worktree for implementation and report whether the environment is ready.