{"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-c72gmsna","versions":[{"created_at":"2026-06-13T16:29:09Z","element_count":72,"note":"5軸GA polish 44->96 by M5 (autonomous)","saved_by":"mcp","sha256":"03f0e59bba4f369d64fb9415da4cbbda18220faa08019299421d7ccbc9941122","version":3},{"created_at":"2026-06-13T16:18:59Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"b19bcbc7b9afb0bcdac8a51dba2c9ab727b75150f3f1ea8b4679b10f67c55575","version":2},{"created_at":"2026-06-13T16:18:58Z","element_count":105,"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}]}