Scenario 1 — Member (open link → explore → comment → join)

• Maps to: first contact with someone else's knowledge base — Link to a site

• Usability: does open → explore the site and content → want to comment → join flow without confusion, especially the sign-in/account step (classic drop-off point)

• PMF: do they sense "people are here" vs. just content (archive vs. living space)

• PMF: does discussing in context feel natural vs. how they normally comment (Docs, Slack, email)

• PMF: what would push them from reading to creating an account

Scenario 2 — Editor (onboard → create site → create document → publish)

• Maps to: the "build your own living space" side — creator/owner experience

• Usability: is onboarding clear, and does create site → create document → publish match their mental model (terminology, where things live, what "site" means)

• PMF: does this fit how they currently organize their work/knowledge

• PMF: what's missing compared to their current or desire tool

• PMF: would they bring their current team/collaborators into this — and what would stop them