QueryPredicateGroup

public class QueryPredicateGroup : QueryPredicate, Encodable, @unchecked Sendable

extension QueryPredicateGroup: Equatable

The conformance is a genuine assertion, not a checked fact. and(_:) and or(_:) mutate predicates in place and return self when the group type already matches, so two tasks composing onto the same group race on an array — and predicates is public internal(set), so external code reads it directly and a lock here would not cover those reads without turning it into a computed property.

What makes this safe in practice is usage, not structure: a predicate is built up on one task and then handed to a query. Sharing a part-built group across tasks is unsupported, and nothing in the type enforces that. The exposure predates this annotation, which only stops the compiler asking.