from fractions import Fraction as F
from pathlib import Path
ROOT=Path(__file__).resolve().parent.parent

def run(load,check):
 reg=load('C286_DATA.json')['target_register'];rows=[];ratio=F(300,299)
 text=(ROOT/'sources/File_02.md').read_text();check('source gap conversion','598\\times300/299=600' in text and 'converts a gap, not a date' in text)
 for x in load('C331_DATA.json')['rows']:
  i=x['i'];M,R=x['records']['M'],x['records']['R'];m,r=M['center'],R['center'];d=m-r;converted=ratio*d
  def matches(role,v):return [z for z in reg if z['tradition']=='MT' and z['role']==role and z['Cainan']==z['Terah60']==z['full430']==1 and z['center']==v]
  upper=matches('Noah birth',r+converted);lower=matches(R['role'],m-converted);primary=x['rail']=='primary'
  check(f'i{i} controlled input',d==(598 if primary else 599))
  check(f'i{i} converted gap',converted==(600 if primary else F(179700,299)))
  check(f'i{i} existing endpoint matches',bool(upper)==bool(lower)==primary)
  if primary:
   check(f'i{i} same-Gear repairs',len(upper)==len(lower)==1 and upper[0]['gear']==R['gear'] and lower[0]['gear']==M['gear'])
   check(f'i{i} directions',upper[0]['center']==m+2 and lower[0]['center']==r-2)
  rows.append({'i':i,'rail':x['rail'],'M':M,'R':R,'input_gap':d,'converted_gap':str(converted),'hold_Flood_Noah_matches':upper,'hold_Noah_Flood_matches':lower,'diagnostic_requirements':{'Noah':str(r+converted),'Flood':str(m-converted)},'new_endpoint_adopted':False})
 check('two primary realizations',sum(bool(x['hold_Flood_Noah_matches']) for x in rows)==2)
 return {'step':'C344','ratio':'300/299','rows':rows,'source_local_example':{'Noah598':2841,'Noah600':2843,'held_Flood':2243,'full430_T60_CainanON_translation':405},'source_scope':'File02 §6.2 holds Flood2243; §6.3 converts598 to600, not dates or ResidueProtocol. The alternate held-Noah repair uses independently admitted Flood Gear records.','companion_conversion':'599×300/299=601+1/299, not601','source_prescribed_global_map':False}