{"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-ybi20i8s","versions":[{"created_at":"2026-06-22T19:26:59Z","element_count":71,"note":"5軸GA polish 44->93 by M5 (autonomous)","saved_by":"mcp","sha256":"ae22a0a47ed71ab483b447030af2333464a64580b3dc79a595eaee8729cf66cf","version":3},{"created_at":"2026-06-22T19:24:26Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"c53ea616a93a960ba4ba2be60f1d7eef7037a6656ed7761112baf6f3920e830e","version":2},{"created_at":"2026-06-22T19:24:26Z","element_count":119,"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}]}