nx_flip_lib.nx

nx_flip_lib.nx -- THE BASE for the FlipOrgan family (rule #6 OO base, rule #15 DRY, rule #22). NishiLang has no classes, so the base-class contract is expressed as a shared library every organ in the family imports and specialises. Before this, nx_flip_score / _real / _defl / _worklist / _gate each carried their OWN copy of the SAME ~17 primitives under a private prefix (fl_ fr_ fd_ fw_ fg_) -- five copies of column parsing, five of integer printing, five of the line-scan idiom. A fix to any one of them fixed only one organ. That does not scale and it is how the family drifts. THE FAMILY CONTRACT every FlipOrgan honours (enforced by nx_flip_gate, 16 cases): 1. summary + `verdict=` FIRST, detail buffered and flushed last (nx_plan_run caps snippets at 200B) 2. FAIL-CLOSED on absent input -- an absent finding/component/observation is a FINDING, not a neutral 3. every threshold read from a plane, never a literal in code (rule #11) 4. integer-only arithmetic, basis points for ratios (no-float substrate) 5. a `verdict=` anchor so the ecosystem judge can read the result (D001) TAB-separated, newline-terminated plane rows are the ONE wire format (rule: planes > tsv). license_tier: ORIGINAL No hw writes (Rule 26).