{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-pollardlanehouse-tf7af821","versions":[{"created_at":"2026-06-10T22:53:34Z","element_count":63,"note":"legacy fix: jpy87379776→quote22685733 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"0e170000de43436fc65dd99e14e957013fc09291d5aecc5ce52188f85439b4df","version":10},{"created_at":"2026-06-10T16:55:08Z","element_count":84,"note":"5軸GA polish 43->98 by M5 (autonomous)","saved_by":"mcp","sha256":"a9612a6984f595a410f6dc9818d7351282e16b2200ed3985ef297b0328d85175","version":2}]}