{"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-5ltgtxye","versions":[{"created_at":"2026-06-10T23:39:48Z","element_count":83,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"b4a38e0b6243c3f362338b4e245132e14a02b8566d4166f31035db52cc1340ce","version":11},{"created_at":"2026-06-10T23:09:16Z","element_count":47,"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":"76a53651cc0800ef5225fd294e7a971c9b018da6ec62da108456806553a032db","version":7}]}