{"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-grandunionbungalow-u7lhyrz6","versions":[{"created_at":"2026-07-02T19:55:06Z","element_count":88,"note":"5軸GA polish 38->92 by M5 (autonomous)","saved_by":"mcp","sha256":"8e30952aa698083449cbf8259d96cb231a990adf210b1a2f7d07f2416a433468","version":3},{"created_at":"2026-07-02T19:49:23Z","element_count":85,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"d41f6c2454b881a50b0e3fe67fece9a61dc99113acccbf4e4538356990796744","version":2},{"created_at":"2026-07-02T19:49:23Z","element_count":85,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}