import type { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
interface PeriodEntry {
    period: string;
    newContributors: string[];
    departedContributors: string[];
    activeContributors: string[];
    totalActive: number;
    busFactor: number;
    retentionRate: number | null;
}
type TrendDirection = "growing" | "stable" | "shrinking";
export interface ContributorGrowthResult {
    totalContributors: number;
    periods: PeriodEntry[];
    trend: TrendDirection;
    overallRetentionRate: number | null;
}
export declare function registerGitContributorGrowth(server: McpServer): void;
export {};