nx_mode.nx

nx_mode.nx -- WRITING arc, rung W-MODE-1: the data-driven MODE / PERSONA ROUTER. One assistant, many modes (correspondence / manga / erotica / paper / scenario / language / social). Each mode is a ROW in a registry (operator DATA, rule 11), tab-separated: mode <TAB> register <TAB> lane <TAB> structure register = sfw | mixed | explicit lane = tutor | local so the runner dispatches the right structure organ + governance + generation lane without any hardcoded per-mode logic. THE SEAM, MADE MECHANICAL (not a promise): md_seam_audit proves that EVERY explicit-register mode routes to the LOCAL lane. A registry that points an explicit mode at the tutor lane is a VIOLATION the audit COUNTS -- the operator's "Claude never authors explicit prose" rule is enforced by construction and checkable, exactly as the never-brick law is gate-proven rather than asserted. Pure integer, NO syscalls; reuses nx_scenario's line iterator (DRY). license_tier: ORIGINAL module: nishi-core.write.mode depends: nishi-core.write.scenario capability: WRITE_MODE_ROUTER