import type { TypoSuggestion } from '../config/types.js';
/**
 * Cross-references reported keys against a pool of existing candidate keys and
 * suggests the closest match when a key looks like a simple typo of another.
 *
 * This powers the "did you mean DATABASE_URL? (found DATABAS_URL)" hints for:
 *  - compare mode: keys missing from the current file vs. the extra keys it has
 *  - scan mode: variables used in code but not defined vs. the keys that are defined
 *
 * A candidate only qualifies when it is within {@link MAX_TYPO_DISTANCE} edits and
 * within {@link MAX_TYPO_RATIO} of the longer key's length, so short unrelated keys
 * are not matched against each other. Only the single closest candidate is returned
 * per reported key.
 *
 * @param reportedKeys - Keys reported as missing / undefined
 * @param candidateKeys - Existing keys that a reported key may be a typo of
 * @returns One suggestion per reported key that has a likely match
 */
export declare function suggestTypos(reportedKeys: string[], candidateKeys: string[]): TypoSuggestion[];
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