What problem does it solve? Turning a written specification and plan into working code requires coordinating many implementation tasks, verifying each one, and integrating the results without breaking the main branch. This Skill consumes the 3-doc (handoff, spec, plan) produced by the ready skill and executes it end-to-end with structured orchestration instead of ad-hoc coding. ## Core Features & Use Cases - Wave-based parallel execution: Parses the plan's Execution Graph, topologically sorts tasks into waves of up to 8 concurrent subagents, and isolates parallel work in git worktrees. - Evidence-based verification gates: Runs merge gates, integration gates, and a completion gate using captured command exit codes, plus a runtime smoke test for services. - Spec-first review and escalation: Applies conditional spec reviews for risky tasks, a final full-diff review, and a bounded escalation ladder that pauses for the user instead of guessing. - Harness lifecycle management: Creates or updates project documentation (CLAUDE.md/AGENTS.md, docs/) after the first cycle and archives the 3-doc on approval. - Use Case: After ready writes a handoff, spec, and plan for a new feature, invoke go to implement all tasks across isolated worktrees, verify the integrated result, and present it for approval before merging to main. ## Quick Start Invoke the go skill after ready has written the 3-doc to execute the plan and implement the spec.