{"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-bjm4mlfy","versions":[{"created_at":"2026-06-13T20:46:35Z","element_count":73,"note":"5軸GA polish 41->92 by M5 (autonomous)","saved_by":"mcp","sha256":"091f246fef77866df6f8c48992eaf0f5c69da16b0e2926e6a424a1c5bf34a2c8","version":3},{"created_at":"2026-06-13T20:37:04Z","element_count":85,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"ca57137261e0e58cca37d64f3050039162de8c3de825b013fe498a7cb79fe02a","version":2},{"created_at":"2026-06-13T20:37:03Z","element_count":85,"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}]}