{"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-cb2vokg9","versions":[{"created_at":"2026-06-26T06:16:39Z","element_count":90,"note":"5軸GA polish 45->96 by M5 (autonomous)","saved_by":"mcp","sha256":"9683ecd2160b861d2dd3cd2486b4826513a126527672e477b0597abbf4311ac8","version":3},{"created_at":"2026-06-26T06:10:06Z","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":"215388049dcf06fe9edd5d69ad78de1fed700ba08b782b1ba99449ee793a5849","version":2},{"created_at":"2026-06-26T06:10:06Z","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}]}