{"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-g5ls2cyg","versions":[{"created_at":"2026-06-10T22:57:28Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy48570969→quote22448917 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"bd12fd9331f0b8cac8b8034984ee6b810134b29f9baa9b5127503ba4fec205b6","version":9},{"created_at":"2026-06-10T19:18:53Z","element_count":84,"note":"5軸GA polish 56->93 by M5 (autonomous)","saved_by":"mcp","sha256":"25f087a8c141907d0873dc4c2c964770944e8ff63620f39d4b426c5b959ea78b","version":2}]}