nx_build_firsttry_lib.nx

nx_build_firsttry_lib.nx -- CE2 (codeeffectiveness ce_build_firsttry): THE BUILD PILLAR'S TWO RATES, READ FROM THE SHIP JOURNAL (knowledge/status/organ_ship.jrnl, rows epoch<TAB>target<TAB>stage<TAB>verdict<TAB>detail). FIRST-TRY: an EPISODE is a target's run of BUILD rows up to its next SHIPPED row (retries inside it are the same episode). An episode is classified by its FIRST BUILD row: BUILT = first_pass, REFUSED-ADMIT = box_refused (the box, not the code -- its own bucket, outside the rate's denominator), anything else = code_fail. The partition first_pass + code_fail + box_refused = episodes is checked and printed. REWORK: a SHIPPED row whose same-target previous SHIPPED lies within the window is a REWORK event; one carrying bytes= smaller than its predecessor's is a REVERT (a byte decrease after an addition); a pair lacking bytes= on either side is REVERT-UNOBSERVABLE, counted, never guessed. Rows before the window feed STATE (a predecessor ship) but never COUNT. A window with no episode reads first_try UNOBSERVABLE and one with no ship reads rework UNOBSERVABLE -- never 0 permil -- and a run with neither writes NO spine row (an unobservable run must not fabricate a point on the trend). One spine row per MEASURED run, path derived from the journal (the production spine iff the journal is the production one, else a <jrnl>.firsttry.spine sidecar), announced fd= wrote= of=. ONE place holds the counts (the r[] slots below): the emitter, the spine and the gate read the same array. license_tier: ORIGINAL No hw writes.