clarify

Use to run an ambiguity sweep over a written spec.md and close every under-specified point before planning or design proceeds — so two engineers can't reasonably build different things from the same spec. Triggers on "clarify {slug}", "find ambiguities in {slug}", "is the spec ready", "sharpen the spec", "/sdd:clarify {slug}", "прояснити специфікацію", "знайди неоднозначності {slug}", "чи готова специфікація". Re-reads the spec, dispatches a clean-context devil's-advocate subagent to list where the spec forks, then for each ambiguity runs AskUserQuestion to RESOLVE it (tighten §1/§5/§6 in place) or DEFER it (→ §8 Open questions with owner+due). Output: an updated docs/features/{slug}/spec.md with every ambiguity resolved or deferred — none dangling. Hard-refuse if spec.md is missing.