Cross-task review found two edge cases that violated the basket-mode soft-fail contract: - Per-row excluded type (e.g. type = c(NA, "special_district")) hit .coerce_type()'s abort inside the per-row resolver, killing the whole basket call. Now treated as no_match in the sidecar. - Malformed regex in the substring fallback (e.g. name = "San(Diego") propagated DuckDB engine errors. .escape_regex() now backslash- escapes meta characters before the regexp_matches call. Utility- mode regex behavior is unchanged. Plus a new public-surface test for the all-no-match case.