{"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-yptdkxfr","versions":[{"created_at":"2026-07-01T06:56:34Z","element_count":85,"note":"5軸GA polish 42->94 by M5 (autonomous)","saved_by":"mcp","sha256":"c0fb820920eb6cec5215ea6f5fd75e35d94ecb30f69b109d58ce37515c7500da","version":3},{"created_at":"2026-07-01T06:45:16Z","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":"767e7db41dd374b2706d6ff911d57987dea86b2416adf8a3b85b77f381f051f5","version":2},{"created_at":"2026-07-01T06:45:16Z","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}]}