nx_sizeguard.nx

nx_sizeguard.nx -- FAIL LOUD BEFORE A READER SILENTLY TRUNCATES (seq1469 root fix #1). THE CLASS: MEMORY.md is read by a loader that takes the first ~200 lines / ~25KB and DROPS THE REST SILENTLY, TAIL-FIRST. No error, no marker, no count -- so the dropped lines are precisely the ones you would need in order to learn they were dropped. That is the partial-as-complete defect this ecosystem has banned repeatedly (L011 scancap, seq646, nx_debt truncation), sitting in the BOOT PATH. AND IT IS NOT ONE FILE. Append-only artefacts grow forever by design: knowledge/status/*.jrnl, law_warden.jrnl, and -- MY OWN DEBT FROM THIS SESSION -- procchurn.jrnl and adopt_census.txt, both of which I created with no size discipline while filing debt about exactly this. LAW: AN APPEND-ONLY FILE WITH NO SIZE DISCIPLINE IS A FUTURE SILENT TRUNCATION. THE FIX IS A REFUSAL, NOT A REMINDER. Compaction is a workaround every session must repeat forever on files that grow by design; a guard converts an invisible cliff into a loud verdict BEFORE it is crossed. Lives in runtime/ (the PRIMITIVE layer) so any organ can reach it -- seq1450: build the primitive in the layer its consumers can reach; imports nothing above its own layer. argv: <path> <byte-cliff> <line-cliff> [amber-permil] exit 0=GREEN 1=AMBER 2=RED(over cliff) 3=UNMEASURED. license_tier: ORIGINAL No hw writes (Rule 26).