/**
 * Resolve configuration values that may be shell commands, environment variables, or literals.
 *
 * Note: command execution is async to avoid blocking the TUI.
 */
/**
 * Resolve a config value (API key, header value, etc.) to an actual value.
 * - If starts with "!", executes the rest as a shell command and uses stdout (cached)
 * - Otherwise checks environment variable first, then treats as literal (not cached)
 */
export declare function resolveConfigValue(config: string): Promise<string | undefined>;
/**
 * Resolve all header values using the same resolution logic as API keys.
 */
export declare function resolveHeaders(headers: Record<string, string> | undefined): Promise<Record<string, string> | undefined>;
/** Clear the config value command cache. Exported for testing. */
export declare function clearConfigValueCache(): void;