/**
 * True when a caught error is a Neo4j constraint-validation failure. Callers
 * branch on this (the deterministic `code`), never on the human message.
 */
export declare function isConstraintViolation(err: unknown): err is Error & {
    code: string;
};
/**
 * Extract every `` `name` = 'value' `` pair from a Neo4j constraint-violation
 * message. Handles both the single-property form ("... property `x` = 'v'") and
 * the composite form ("... properties `a` = 'v1', `b` = 'v2'"). Returns [] when
 * the message has no parseable pairs, so callers must keep a fallback.
 */
export declare function parseConstraintProperties(message: string): Array<{
    propName: string;
    propValue: string;
}>;
/**
 * Extract the single violated property from a Neo4j constraint message. Matches
 * only the single-property message form ("... property `x` = 'v'") and returns
 * null otherwise — including composite-constraint messages, whose "properties"
 * (plural) form this deliberately does not match. Kept for callers that reason
 * about one property; use parseConstraintProperties for composite constraints.
 */
export declare function parseConstraintProperty(message: string): {
    propName: string;
    propValue: string;
} | null;
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