/**
 * Shared base for the workspace's typed errors. The repo had ~30 error classes
 * in five mutually incompatible shapes; this base captures the reference shape
 * (a `code` discriminant plus a `details` object that always echoes the code and
 * preserves `this.name`) so packages can converge incrementally without changing
 * their runtime field layout.
 */
export declare class CodedError<Code extends string = string> extends Error {
    readonly code: Code;
    readonly details: Record<string, unknown>;
    constructor(code: Code, message: string, details?: Record<string, unknown>);
}
/**
 * Structural guard for coded errors. Matches both {@link CodedError} instances
 * and legacy errors that already carry a string `code`, so callers can stop
 * string-matching `.message` while classes migrate onto the base incrementally.
 */
export declare function isCodedError<Code extends string = string>(error: unknown, code?: Code): error is CodedError<Code>;
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