/**
 * Gemini settings.json helpers.
 */
/**
 * Read existing settings.json, returning empty object if not found.
 * Throws if file exists but contains invalid JSON to prevent data loss.
 */
export declare function readExistingSettings(settingsPath: string): Record<string, unknown>;
/**
 * Build settings with /tmp workspace added.
 *
 * Adds /tmp to workspaces array to allow temporary file writes.
 * Safe for CI/CD environments (ephemeral containers).
 */
export declare function buildSettingsWithTemporaryWorkspace(existingSettings: Record<string, unknown>): Record<string, unknown>;