export type EnvValueEncoding = "minimal" | "json";
export type UpdateEnvFileContentsOptions = {
    valueEncoding?: EnvValueEncoding;
};
export declare function encodeEnvValue(value: string, encoding?: EnvValueEncoding): string;
/**
 * Updates only the named assignments and preserves every unrelated byte.
 *
 * Duplicate managed keys are intentional: every occurrence is checked and any
 * stale occurrence is updated. Occurrences that already decode to the desired
 * value retain their original quoting and spacing.
 */
export declare function updateEnvFileContents(contents: string, entries: Record<string, string>, options?: UpdateEnvFileContentsOptions): string;
/** Writes a changed env file through a same-directory temporary file and rename. */
export declare function writeEnvFileAtomicallyIfChanged(filePath: string, previousContents: string | null, nextContents: string): boolean;
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