{"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-willowcreekcottage-iaf2focd","versions":[{"created_at":"2026-06-13T17:38:49Z","element_count":83,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"496a553f0295532b17bbcc8dd7bd2b4accb13fc1f7b8601386573c459ef67b9c","version":3},{"created_at":"2026-06-13T17:34:22Z","element_count":134,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"565dcbe73fc0264dfe325f07957a0270805718e8fd7b65c7a4b0bcfcd0806132","version":2},{"created_at":"2026-06-13T17:34:20Z","element_count":134,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}