{"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-48gzz114","versions":[{"created_at":"2026-06-13T16:03:51Z","element_count":91,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"7ca8e7b1cdc4154d1cb3eee14de52fbd48892c9f6fe9bae6002b43b03ad87e5e","version":3},{"created_at":"2026-06-13T15:52:11Z","element_count":130,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"84879ee78b0ce72b01d62ecc0d0464428dd3ed6a8b675864b9ecb28a6a3e83be","version":2},{"created_at":"2026-06-13T15:52:08Z","element_count":130,"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}]}