{"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-0iwbmdqn","versions":[{"created_at":"2026-06-10T22:54:28Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy96334560→quote22302745 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"d5d08cef4209b02a1d18c69abe8d635fe95d7a905a4b695991e4de26d8fd4263","version":10},{"created_at":"2026-06-10T17:40:00Z","element_count":72,"note":"5軸GA polish 61->96 by M5 (autonomous)","saved_by":"mcp","sha256":"e3dc8f5367e6454f8f294a596504ff500d931046850d03b090c2e61833adff91","version":3}]}