{"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-3sokek9s","versions":[{"created_at":"2026-07-06T06:21:26Z","element_count":89,"note":"5軸GA polish 42->95 by M5 (autonomous)","saved_by":"mcp","sha256":"6e2ce16d8202753123f0419299b894ec922eaebc543c5e4ba2d4a5d4f1eb3afd","version":3},{"created_at":"2026-07-06T06:07:52Z","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":"5714a3a266617d334d61b246f82a9da68224a08b9113859497b460202e8e3877","version":2},{"created_at":"2026-07-06T06:07:52Z","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}]}