/** A single symbol change to include in the trailer. */
export interface SymbolDiffEntry {
    readonly name: string;
    readonly kind: string;
    readonly changeKind: "added" | "removed" | "changed";
}
/** Options for trailer formatting. */
export interface TrailerOptions {
    /** Maximum entries before truncation. Default: 20. */
    readonly maxEntries?: number;
}
/**
 * Format a list of symbol changes as a Git commit trailer.
 *
 * Format: `Structural-Diff: added fn:X; removed class:Y; changed fn:Z`
 *
 * Returns empty string if there are no changes.
 */
export declare function formatStructuralDiffTrailer(entries: readonly SymbolDiffEntry[], options?: TrailerOptions): string;
/**
 * Parse a Structural-Diff trailer back into structured entries.
 *
 * Skips malformed entries gracefully.
 */
export declare function parseStructuralDiffTrailer(text: string): SymbolDiffEntry[];
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