What problem does it solve? Applying a planned change to a codebase involves coordinating implementation, review, and commit decisions; doing this manually risks missed tasks, unreviewed diffs, and premature commits. ## Core Features & Use Cases - Pre-flight validation: Verifies the OpenSpec change exists, has no unresolved decisions, and that prerequisite changes have landed before any code is written. - Delegated build with adaptive review: A builder subagent executes tasks.md (single pass or parallel worktree slices), then reviewers are selected based on what the diff actually touches, with findings synthesized into blocking, non-blocking, and drift categories. - Use Case: After planning a change with plan-change, run this skill to have a builder implement the tasks, get domain-matched reviewers to inspect the diff, iterate up to three build cycles on blocking findings, and commit only after your explicit confirmation. ## Quick Start Apply the OpenSpec change named add-auth-flow by running the apply-change skill with that change name as the argument.