{"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-t4c0ki6x","versions":[{"created_at":"2026-07-13T10:37:34Z","element_count":90,"note":"5軸GA polish 39->94 by M5 (autonomous)","saved_by":"mcp","sha256":"9ce785b4feae93ab13c0da89b49180555f77d50bfed659997000c20b78a405e9","version":3},{"created_at":"2026-07-13T10:32:46Z","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":"943143bd5d96833f3e8def9d45bc4d175b897df02678647cc68d91fd0e954406","version":2},{"created_at":"2026-07-13T10:32:46Z","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}]}