{"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-9k0255kl","versions":[{"created_at":"2026-06-10T22:52:46Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote20424136 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"d8de61915e4774b33d5640456b8aa340d6acd15c9d2509a23d48c9ac08074a3e","version":11},{"created_at":"2026-06-10T16:08:52Z","element_count":85,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"7fe96dab253342ebc5cc35a60d5553bb068fcbbc505f9b6b272abde1acb2e4f6","version":3}]}