/**
 * Agent Version Registry — Track and diff agent versions over time
 */
export interface AgentMeta {
    model?: string;
    systemPrompt?: string;
    tools?: string[];
    temperature?: number;
    maxTokens?: number;
    config?: Record<string, any>;
    [key: string]: any;
}
export interface VersionEntry {
    name: string;
    version: string;
    metadata: AgentMeta;
    registeredAt: string;
}
export interface VersionDiff {
    name: string;
    v1: string;
    v2: string;
    changes: DiffChange[];
}
export interface DiffChange {
    field: string;
    from: any;
    to: any;
}
export declare class VersionRegistry {
    private entries;
    /**
     * Register a new agent version.
     */
    register(name: string, version: string, metadata: AgentMeta): void;
    /**
     * Get version history for an agent.
     */
    getHistory(name: string): VersionEntry[];
    /**
     * Get a specific version entry.
     */
    getVersion(name: string, version: string): VersionEntry | undefined;
    /**
     * Get the latest version for an agent.
     */
    getLatest(name: string): VersionEntry | undefined;
    /**
     * Diff two versions of an agent.
     */
    diff(name: string, v1: string, v2: string): VersionDiff;
    /**
     * Rollback to a previous version (returns the metadata for that version).
     */
    rollback(name: string, version: string): AgentMeta;
    /**
     * List all registered agent names.
     */
    listAgents(): string[];
    /**
     * Save registry to disk.
     */
    save(filePath: string): void;
    /**
     * Load registry from disk.
     */
    load(filePath: string): void;
    /** Number of agents tracked */
    get size(): number;
    /** Total versions across all agents */
    get totalVersions(): number;
}
/**
 * Format a version diff for console display.
 */
export declare function formatVersionDiff(diff: VersionDiff): string;
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