{"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-cu1qc0u8","versions":[{"created_at":"2026-06-10T22:52:32Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote21237329 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"24267834a9fd5648c9bc3f196390df21d8b3487c636d82e06bfb216b6125110d","version":19},{"created_at":"2026-06-10T13:06:09Z","element_count":90,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"bbe5ab944aaedb8b4cc02b5b47c5ea00ab424fe8315dec7220d030f5b67f5584","version":4}]}