/**
 * An entry in the "add" or "unchanged" category of a diff.
 */
export interface EnvVarEntry {
    key: string;
    value: string;
}
/**
 * An entry in the "update" category of a diff, showing both old and new values.
 */
export interface EnvVarUpdateEntry extends EnvVarEntry {
    oldValue: string;
}
/**
 * The result of comparing local env vars against remote MRT env vars.
 */
export interface EnvVarDiff {
    /** Variables present locally but not in MRT — will be added. */
    add: EnvVarEntry[];
    /** Variables present in both with differing values — will be updated. */
    update: EnvVarUpdateEntry[];
    /** Variables present in both with identical values — no action needed. */
    unchanged: EnvVarEntry[];
    /** Variables present in MRT but not locally — will NOT be deleted. */
    remoteOnly: EnvVarEntry[];
}
/**
 * Returns a new Map excluding entries whose keys start with any of the given prefixes.
 *
 * @param vars - Map of environment variable key-value pairs
 * @param excludePrefixes - Prefixes to exclude (e.g. ['MRT_', 'SFCC_'])
 */
export declare function filterByPrefix(vars: Map<string, string>, excludePrefixes: string[]): Map<string, string>;
/**
 * Computes the diff between local env vars and remote MRT env vars.
 *
 * @param local - Local env vars (already filtered)
 * @param remote - Remote MRT env vars
 */
export declare function computeEnvVarDiff(local: Map<string, string>, remote: Map<string, string>): EnvVarDiff;
/**
 * Formats a human-readable diff summary using ASCII markers.
 *
 * @param diff - The diff to format
 */
export declare function formatEnvVarDiffSummary(diff: EnvVarDiff): string;