export declare class ExitError extends Error {
    readonly code: number;
    constructor(message: string, code?: number);
}
/**
 * Pull a human-readable string out of an unknown error value.
 *
 * `try/catch` clauses bind `e` as `unknown` under strict TS, but
 * 95% of the time we want either `e.message` (when it's an Error)
 * or `String(e)` (when something threw a non-Error). This helper
 * collapses both into one call and removes the per-callsite
 * `(e as Error).message` cast that was littering the codebase.
 */
export declare function errMessage(e: unknown): string;
/**
 * Read the `.code` field from an fs / child_process error.
 *
 * Node's filesystem errors are `Error & { code: string; ... }` —
 * the `NodeJS.ErrnoException` shape. The cast appears at every
 * callsite that wants to distinguish ENOENT from a real failure;
 * this helper centralises the unwrap so the cast lives in one place.
 *
 * Returns `undefined` for non-Error values or for Errors that don't
 * carry a `.code` field, so callers can `errnoCode(e) === 'ENOENT'`
 * without an extra typeof check.
 */
export declare function errnoCode(e: unknown): string | undefined;
/**
 * Diagnostic logger for the profiles subsystem.
 *
 * Writes a single line to stderr only when `CLAUDE_SWITCH_DEBUG_PROFILES=1`.
 * Used by `ensureProfileForAccount` and related helpers to expose the
 * decision path that determines whether a profile has valid credentials.
 *
 * Enable at the shell:
 *   CLAUDE_SWITCH_DEBUG_PROFILES=1 claude switch <email>
 */
export declare function debugProfiles(...args: unknown[]): void;