What is implement-plan-preflight?
Run the Preflight phase of the ITP workflow to create ADR and design spec artifacts. Use whenever the user asks to create an ADR, write a design spec, set up MADR-format documentation, or when the /itp:go workflow enters its preflight stage. Do NOT use for general documentation writing or markdown formatting that is unrelated to the ADR-driven development workflow. Source: terrylica/cc-skills.