{"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-7hw47lm6","versions":[{"created_at":"2026-06-11T00:31:37Z","element_count":89,"note":"5軸GA polish 61->97 by M5 (autonomous)","saved_by":"mcp","sha256":"6d6522dc210c0f9b102df00d896d455dce00127dcd8477d3da1ab1addc2a9314","version":15},{"created_at":"2026-06-10T23:10:22Z","element_count":50,"note":"legacy fix: rooms設備語除去 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"0112e7cbf5ebb0edf69b12e653043362ca411eac4e693efde6e57db167d186a6","version":7}]}