{"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-z0wyqbec","versions":[{"created_at":"2026-06-13T17:38:52Z","element_count":84,"note":"5軸GA polish 43->95 by M5 (autonomous)","saved_by":"mcp","sha256":"b177a747ec99dd1bdac6e93552c89d8c730b4b764b834cf6ce11cf488fad2bfb","version":3},{"created_at":"2026-06-13T17:22:38Z","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":"c10c6e53143c686479bd1b20aa5dc4f9a67cda157be86396d68e3fcffc419b18","version":2},{"created_at":"2026-06-13T17:22:36Z","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}]}