{"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-ksch14ip","versions":[{"created_at":"2026-06-13T19:45:31Z","element_count":84,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"9c46cd66ea3aa24682ab3a0b79b506c747c2115da5c07f5819252e87d0a0556a","version":3},{"created_at":"2026-06-13T19:38:32Z","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":"9032dbb3aa5b5cba3ad52b73e30f2d88d222257a4aa5da58e4f2490517b9b02b","version":2},{"created_at":"2026-06-13T19:38:29Z","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}]}