{"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-eastmanriversidebung-lgu0dw3p","versions":[{"created_at":"2026-06-25T11:26:18Z","element_count":82,"note":"5軸GA polish 38->91 by M5 (autonomous)","saved_by":"mcp","sha256":"ac99475087f2c9d84cd72dcadc57579b77453c442b9f19ad199e2dfae37e3c31","version":3},{"created_at":"2026-06-25T11:23:06Z","element_count":119,"note":"loop3: 設計時延床 45.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f7c8f8daa64011e4016b35ea74f30906397b12a1b4376da664fe6c04bb94d5c6","version":2},{"created_at":"2026-06-25T11:23:06Z","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}]}