{"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-ceek6a8c","versions":[{"created_at":"2026-06-27T19:37:15Z","element_count":91,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"b9334ba3378ae803174f278fd8a08a2ddf6c113888e97275656cef8e1d76f8f8","version":3},{"created_at":"2026-06-27T19:25:06Z","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":"8de3ed14eec8342718c9fa24e9a79af37c158e1a66ed8d2528789e3236496a42","version":2},{"created_at":"2026-06-27T19:25:06Z","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}]}