{"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-house-a58kxz11","versions":[{"created_at":"2026-06-10T22:52:25Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy96334560→quote22666392 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"b5a9ce093526f26acd8cd5a713ec8f55185dd5c753d84c2e45f1e61ef326d1ed","version":23},{"created_at":"2026-06-10T13:30:47Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積92.5㎡(基礎/屋外/ロフト除外)。設備数量/コスト過大の是正","saved_by":"mcp","sha256":"1d9a1be1afd03a1ad33c31335d8f50d77b168e3c5b367108f4496629318d7fe1","version":9},{"created_at":"2026-06-10T11:59:59Z","element_count":71,"note":"5軸GA polish 61->96 by M5 (autonomous)","saved_by":"mcp","sha256":"fbf7e37fe3a62dd78b8a8900f10ed2d3fdd3e84e4e0dff92420a44d28463f8cd","version":4}]}