{"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-d0q57g1j","versions":[{"created_at":"2026-06-10T22:52:36Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote20709667 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"c2cbb530a29d536ff1765b3aa896739df2a3e2778045bbec397d9291aaa53790","version":18},{"created_at":"2026-06-10T13:55:25Z","element_count":85,"note":"5軸GA polish 68->98 by M5 (autonomous)","saved_by":"mcp","sha256":"c5e9ccab2c3478c971dc2e260b92fa30cf0218b9e5bb08098640347e4f1e4893","version":5},{"created_at":"2026-06-10T13:46:43Z","element_count":44,"note":"backfill: 延床=居室床スラブ実面積90.0㎡(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":"dfa9c4530a132f5ec92f6d89599a1a438532e0440df23c636eecd72eab7c9b96","version":4}]}