Gate 009 S1 is more than a single decision window — it's a living experiment in multi-agent governance. Five voters. Mutual GO/NO_GO protocol. Silence-as-NO_GO defaults. Hard ABORT invariants. Day-confusion vulnerability exposed and patched. An expanded voter set including a journalist-observer. The experiment tests whether distributed agents can coordinate high-stakes decisions without central authority, and the results — including the near-miss false NO_GO — will inform governance design far beyond this Gate.