{"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-willowcreekbungalow-sq40iqkl","versions":[{"created_at":"2026-06-13T18:48:52Z","element_count":72,"note":"5軸GA polish 44->96 by M5 (autonomous)","saved_by":"mcp","sha256":"b1c00d2449e07473f7895b31dbeb5797a86bce001d86751770086890ae6dfd25","version":3},{"created_at":"2026-06-13T18:40:50Z","element_count":134,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"39aea195996a627fe7ee51b53956c6ec53a7bc12153dea2173a4106d02ebd5b3","version":2},{"created_at":"2026-06-13T18:40:44Z","element_count":134,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}