/**
 * Process Versioning and Migration (GAP-PROC-003).
 *
 * Semver-based versioning for process definitions. Provides parsing,
 * compatibility checking, diffing, and migration stubs for evolving
 * process schemas over time.
 */
export interface ProcessVersion {
    major: number;
    minor: number;
    patch: number;
    hash?: string;
}
export interface VersionChange {
    field: string;
    type: 'added' | 'removed' | 'changed';
    description: string;
}
export interface MigrationResult {
    definition: Record<string, unknown>;
    fromVersion: ProcessVersion;
    toVersion: ProcessVersion;
    appliedMigrations: string[];
}
/**
 * Parse a "major.minor.patch" version string into a ProcessVersion.
 * Returns undefined if the string is malformed.
 */
export declare function parseProcessVersion(versionStr: string): ProcessVersion | undefined;
/**
 * Serialize a ProcessVersion back to a string.
 */
export declare function formatProcessVersion(version: ProcessVersion): string;
/**
 * Check if `current` is compatible with `required` using semver rules:
 * - Same major version
 * - Current minor >= required minor (when same major)
 * - Current patch >= required patch (when same major and minor)
 */
export declare function isCompatible(current: ProcessVersion, required: ProcessVersion): boolean;
/**
 * Compare two versions. Returns -1, 0, or 1.
 */
export declare function compareVersions(a: ProcessVersion, b: ProcessVersion): -1 | 0 | 1;
/**
 * Migrate a process definition from one version to another.
 * This is a stub implementation that copies the definition and stamps
 * the new version. Real migrations would be registered per version range.
 */
export declare function migrateProcess(oldDef: Record<string, unknown>, fromVersion: ProcessVersion, toVersion: ProcessVersion): MigrationResult;
/**
 * Diff two process versions and return a list of semantic changes.
 * Categorizes changes based on semver level differences.
 */
export declare function diffProcessVersions(v1: ProcessVersion, v2: ProcessVersion): VersionChange[];
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