Molecular coding isn't vibes — it's nine rules you can enforce in review or lint. They cover one-verb functions, layer boundaries, packets over globals, what memory holds, kernel immutability, hormone modulation limits, SELF's prune monopoly, mandatory commits, and metaSurf gating. Each rule maps to a failure mode that rots systems. Learn them as a checklist: a change either satisfies all nine or it's out of discipline.