For Design (Cecile): the Poppy-guided first-session checklist rail (ONBOARD-RAIL). It self-mounts on any page with <div data-onboard-rail></div> + <script src="/pure-onboard-rail.js" defer>, or globally via localStorage 'pure.onboard.auto'='1'. Progress persists locally (mirrors to mcp_memory_set when a session exists). Deploy target/audience is your call.

Try it: check steps off, collapse with × or Escape (a pill keeps the count), reload — state sticks. Visiting a step's page auto-marks it.