{"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-4fha3p7a","versions":[{"created_at":"2026-06-30T06:19:43Z","element_count":90,"note":"5軸GA polish 42->94 by M5 (autonomous)","saved_by":"mcp","sha256":"6ca3662970ffa0beb4819e963a14bcc583c37606f06c10f30bf47720a3113951","version":3},{"created_at":"2026-06-30T06:14:53Z","element_count":86,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"a1c6b41d9108b1857899d006dba4e71b2391d0bff78980f2cb9a89900dc60241","version":2},{"created_at":"2026-06-30T06:14:53Z","element_count":86,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}