{"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-belgianmeadowbungalo-goplm169","versions":[{"created_at":"2026-06-23T13:05:24Z","element_count":90,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"e303c2c8c57ef3878604d62110fb344308b0b93fb39a8479b3525e2e3f4912d8","version":3},{"created_at":"2026-06-23T12:55:59Z","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":"0e26baaa6a0217c7098a0b8b8ae9dd35a3a4f529c85b11dc16420f1eb8dcff19","version":2},{"created_at":"2026-06-23T12:55:58Z","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}]}