/**
 * Parse unified-diff text and return the set of 1-based line numbers that are
 * ADDED in the new version of the file. Works at any `--unified` context level.
 */
export declare function addedLinesFromUnifiedDiff(diff: string): Set<number>;
/** Keep only findings whose line number is in the added-line set. */
export declare function filterToAddedLines<T extends {
    line: number;
}>(findings: T[], added: Set<number>): T[];
/** Lines added in `relPath` relative to a git base ref (branch/commit/HEAD~N). */
export declare function getAddedLinesForDiff(base: string, relPath: string, cwd: string): Set<number>;
/** Lines added in `relPath` in the staged (index) changes — for pre-commit gating. */
export declare function getAddedLinesStaged(relPath: string, cwd: string): Set<number>;
export interface BaseResolution {
    ok: boolean;
    base?: string;
    error?: string;
}
/**
 * Resolve a usable diff base. Distinguishes "not a git repository" from "that ref does
 * not exist here" (the old code conflated both as "Ensure you're in a git repository"),
 * and — when no base is explicitly requested — auto-detects instead of hard-coding `main`
 * (which fails on `master`-named or freshly-initialized repos). Fallback order:
 * origin/HEAD → main → master → HEAD~1 → HEAD (uncommitted changes).
 *
 * @param strict when a base IS requested but missing, error instead of falling back
 *   (used by the CLI so a typo'd ref is reported, not silently swapped).
 */
export declare function resolveGitBase(cwd: string, requested?: string, opts?: {
    strict?: boolean;
}): BaseResolution;