{"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-hillsideedgehouse-8ul2s7xw","versions":[{"created_at":"2026-07-16T01:00:55Z","element_count":83,"note":"5軸GA polish 38->92 by M5 (autonomous)","saved_by":"mcp","sha256":"3481ed94a5f9aa15d953464164a8f04531255838e8a08e311ebda83217e4655b","version":3},{"created_at":"2026-07-16T00:55:36Z","element_count":119,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"9e408c0034221deed8d2ed9a6f3cd28e544adf5af5c93e67b8e8b1abfb7cdfac","version":2},{"created_at":"2026-07-16T00:55:34Z","element_count":119,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}