{"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-wxo8j89f","versions":[{"created_at":"2026-07-02T07:53:11Z","element_count":83,"note":"5軸GA polish 43->96 by M5 (autonomous)","saved_by":"mcp","sha256":"a7385b33925eac7a4a051ed58b1eb92f0a49cd1545eea9875de31e231bc0e9d2","version":3},{"created_at":"2026-07-02T07:44:06Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"a82bea88e43aca602d62c5bdd4bff535498604f2f84642d1a503313a30e80508","version":2},{"created_at":"2026-07-02T07:44:05Z","element_count":126,"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}]}