/**
 * Shared JSON-shape validation helpers for Dreamux config readers.
 *
 * Any code that reads a config block validates it with these: each provider
 * package's own `config.ts` for its provider's block, and the host's config
 * module and plugin loader for theirs. They are runtime-agnostic — they know
 * only JSON shapes — and every rejection they throw is a {@link RuleViolation}
 * carrying a `dreamux config error in <file>: ...` message, so a host reader
 * that received the value from a caller can tell a refused value from a
 * failure of its own.
 */
export declare function describeType(v: unknown): string;
export declare function readNonEmptyString(obj: Record<string, unknown>, key: string, file: string, prefix?: string): string;
export declare function readOptionalString(obj: Record<string, unknown>, key: string, file: string, prefix?: string): string | null;
export declare function readOptionalBoolean(obj: Record<string, unknown>, key: string, fallback: boolean, file: string, prefix?: string): boolean;
export declare function readStringArray(obj: Record<string, unknown>, key: string, fallback: string[], file: string, prefix?: string): string[];
export declare function readStringRecord(obj: Record<string, unknown>, key: string, fallback: Record<string, string>, file: string, prefix?: string): Record<string, string>;
export declare function readPositiveInt(obj: Record<string, unknown>, key: string, fallback: number, file: string, prefix?: string): number;
export declare function readProviderConfigObject(rawConfig: unknown, file: string, name: string, options?: {
    allowMissing?: boolean;
}): Record<string, unknown>;
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