{"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-bd14p7zn","versions":[{"created_at":"2026-06-10T22:57:16Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote20954809 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"003bcb0bb2e242ee7930d82eeed68c8d1e8f0e1f57dfaeb08ac27ee7b1bb60e9","version":9},{"created_at":"2026-06-10T19:18:56Z","element_count":89,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"03f1dd94a89a833cefd3cd15b3dd5e4b086998c972152b140247c15dc188d4f2","version":2}]}