/**
 * Deterministic guard for unsupported person-affiliation and presence claims.
 *
 * Opportunity presentation contracts currently do not carry typed provenance
 * proving attendance, membership, residence, or shared presence. The guard
 * therefore fails closed: a sentence making one of those claims is rejected
 * rather than loosely "grounded" against network/context text.
 *
 * The patterns are deliberately phrase-based. They target factual claims such
 * as "Alice is a member of..." while leaving generic domain phrases such as
 * "membership model" and "team members" alone. This is not a general factuality
 * checker and does not attempt semantic inference beyond the listed claim
 * families.
 */
/** Returns true when text contains an unsupported affiliation/presence claim. */
export declare function hasUnsupportedOpportunityClaim(text: string | null | undefined): boolean;
/** Returns true when one sentence contains an unsupported claim family. */
export declare function isUnsupportedOpportunityClaimSentence(sentence: string): boolean;
/**
 * Removes complete sentences containing unsupported claims and preserves the
 * remaining sentence order. An all-unsafe input becomes an empty string so the
 * caller can apply a field-specific deterministic default.
 */
export declare function stripUnsupportedOpportunityClaims(text: string | null | undefined): string;