{"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-lr0t9h63","versions":[{"created_at":"2026-06-10T22:52:02Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote20920518 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"be41e8ae2fc8eec2eb410fe48a65f26141061a490037c56f222e11396e0a3742","version":26},{"created_at":"2026-06-10T13:10:31Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積81.4㎡(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":"42953ddb9d392a8e7e67cec89ccfb88678d3f8f3fa6411994638b80566ac7043","version":11},{"created_at":"2026-06-10T08:15:34Z","element_count":89,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"3976441a0a30c3b13f62cd01e4d8b0ac2ece1248924327f454a73df3123275d1","version":2}]}