/**
 * Novelty Checker — determines if a bounty finding has already been reported/patched.
 *
 * Layer 1 (fast, local): Git recency + release notes keyword scan.
 * Layer 2 (deep, API): GitHub Security Advisories + code comparison.
 */
export type NoveltyStatus = 'likely-novel' | 'likely-patched' | 'check-manually';
export interface NoveltyResult {
    status: NoveltyStatus;
    reason: string;
}
export interface GitSecurityResult {
    hasSecurityFixes: boolean;
    matchingCommits: string[];
}
export interface DeepCheckResult {
    status: NoveltyStatus;
    reason: string;
    advisories: string[];
    hacktivityMatches: string[];
    codeStillVulnerable: boolean | null;
}
/**
 * Extract security-relevant keywords from a claim description.
 */
export declare function extractSecurityKeywords(claim: string): string[];
/**
 * Parse git log output and check for security-related commits
 * that mention any of the given keywords.
 */
export declare function parseGitLogForSecurityFixes(gitLog: string, keywords: string[]): GitSecurityResult;
/**
 * Parse git tag output into a clean array of tag names.
 */
export declare function parseGitTags(output: string): string[];
/**
 * Layer 1: Quick novelty check using only local git data.
 */
export declare function checkNoveltyLocal(targetPath: string, file: string, claim: string): NoveltyResult;
/**
 * Check GitHub Security Advisories for a repo.
 * Requires `gh` CLI to be installed and authenticated.
 */
export declare function checkGitHubAdvisories(owner: string, repo: string, keywords: string[]): {
    found: boolean;
    matches: string[];
};
/**
 * Check if the vulnerable code still exists on the main branch.
 * Now actually checks file existence + optionally greps for claim pattern.
 */
export declare function checkCodeOnMain(targetPath: string, file: string, claimKeywords?: string[]): {
    exists: boolean;
    lastModified: string | null;
    reason: string;
};
/**
 * Layer 2: Full deep novelty check with API calls.
 */
export declare function deepNoveltyCheck(targetPath: string, file: string, claim: string, repoUrl: string): DeepCheckResult;