{"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-y87ixe67","versions":[{"created_at":"2026-06-10T23:05:51Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote21259834 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"8b9290c93a17a11fe219dfe19b6443dddd0b06d6592389ff70d702dde6b215b8","version":9},{"created_at":"2026-06-10T22:17:14Z","element_count":89,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"13dab2c0e722620af436a797e172399a8a5f50b7b546368e2476d4b544b2c178","version":4}]}