{"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-hatchlanehouse-6fshzk17","versions":[{"created_at":"2026-07-13T11:24:51Z","element_count":82,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"d87ce551e34b1d84a7cdc441340374d6b412b32d2a299ae44362585c6d7d7631","version":3},{"created_at":"2026-07-13T11:18:52Z","element_count":86,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"74b8bbf046cfd4394ea637c5df002342047026b33a15cea379a21188d51cad8f","version":2},{"created_at":"2026-07-13T11:18:52Z","element_count":86,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}