nx_greeting.nx

nx_greeting.nx -- WRITING arc, rung W-GR-1: THE THREE-BEAT GREETING. Closes gap-queue row #4 of nx_writebench (pop 342/378). The ruler (arXiv:2601.14324) finds the greeting is THE LOAD-BEARING ARTIFACT of a character bot: it is the only text every user reads, it sets the register, and it is what makes an opening feel like a scene instead of a bio. Its structure is three ordered beats: 1. SELF-INTRODUCTION -- who is speaking 2. SCENARIO / INCITING INCIDENT -- the situation that has already started 3. DIRECT ADDRESS -- the turn to the reader that hands them the move ★WHY ORDER IS PART OF THE MEASUREMENT AND NOT A STYLE OPINION. The same three beats in a different order produce a different artifact: address-first is a chatbot prompt, scenario-first with no introduction is a narrator, and introduction-only is a character sheet. The ruler's finding is about a SEQUENCE, so a detector that only counted presence would call all four of those "complete" and measure nothing. Presence and order are reported separately, and the headline requires both. ★CRAFT, NOT COMPLIANCE. This organ scores STRUCTURE. It has no view on register or content: an SFW greeting and an explicit one are graded by the same three beats, because the thing being measured is whether the opening works, not what it is about. Register lives in nx_register and the legal line lives upstream in rg_decision -- see [[feedback-hosting-legal-posture]]. Lexicons stay pure operator DATA (the packed NUL-terminated terms + parallel weights contract nx_register/nx_dialogue/nx_realperson already use), so a lane can tune or translate the markers without touching this logic, and this organ authors no content. Pure integer, NO syscalls, caller owns every buffer. license_tier: ORIGINAL module: nishi-core.write.greeting capability: WRITE_GREETING_STRUCTURE