{"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-4srug85r","versions":[{"created_at":"2026-06-30T19:50:48Z","element_count":89,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"f24666ef3f75593a7ad16c7353646410139cf319fa5660a132fcd289994bb66b","version":3},{"created_at":"2026-06-30T19:40:29Z","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":"e2412ee04065367d02930b37d6393b5744249925c6b7cffb18adb049c775e7ba","version":2},{"created_at":"2026-06-30T19:40:28Z","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}]}