{"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-o84hi6lj","versions":[{"created_at":"2026-06-15T06:20:56Z","element_count":74,"note":"5軸GA polish 43->94 by M5 (autonomous)","saved_by":"mcp","sha256":"5674a31ed6cf16108ae506f9f1141f65bb9bb32b9aa96c26beecb1585e43212b","version":3},{"created_at":"2026-06-15T06:05:06Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"aaed6495c67f88dadf6dbdce2e973bde4209092b7df5667379f827d72bc33fcd","version":2},{"created_at":"2026-06-15T06:05:06Z","element_count":105,"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}]}