export type ChatStorageErrorCode = "invalid_scope" | "invalid_actor" | "invalid_provenance" | "invalid_content_policy" | "scope_mismatch" | "duplicate_record" | "not_found" | "storage_path_rejected" | "storage_corrupted" | "unsupported_schema_version";
export interface ChatValidationIssue {
    code: ChatStorageErrorCode;
    field: string;
    message: string;
}
export type ChatValidationResult<T> = {
    ok: true;
    value: T;
} | {
    ok: false;
    issues: ChatValidationIssue[];
};
export declare class ChatStorageError extends Error {
    readonly code: ChatStorageErrorCode;
    readonly field: string;
    constructor(issue: ChatValidationIssue);
}
export declare function safeStorageIssue(code: ChatStorageErrorCode, field: string, message: string): ChatValidationIssue;
export declare function genericInvalidIssue(): ChatValidationIssue;