[
  {
    "id": "tokyo-through-running-scope",
    "operations": [],
    "reason": "Feasibility operator/service-word filtering: exclude limited/rapid/through services, trim foreign-operator tails; missing internal nodes split a service. Unavailable coverage must fail G1 rather than widening scope silently. Oedo next signed terminus is Tochomae while on the loop part; the tail keeps Hikarigaoka. A change of train at two occurrences of Tochomae in the same pattern is allowed and counts as a change. Expert evidence: golden/tokyo.json tokyo-5. Recognise the pinned joint operator alias 都営地下鉄 at Oshiage A20 (nodes 339081985, 6417194081, 6417195285, 7913290542; station 7992223096) as Toei. The original ordered Asakusa pattern therefore retains its real terminus; Keisei-only through stops remain excluded."
  }
]