import type { JsonValue } from "../types/index.js";
/**
 * @description Masks the value stored under a credential-looking key. Structures under a plural token key (`tokens`) keep their shape with every string masked; anything else collapses to the placeholder.
 * @param key {string} - Property name that matched the sensitive-key pattern.
 * @param entry {JsonValue} - Value stored under that key.
 * @returns {JsonValue} The masked value.
 */
export declare function redactSensitiveEntry(key: string, entry: JsonValue): JsonValue;
/**
 * @description Masks credentials written as `name=value`, `name: value` or as a recognizable bare key (OpenAI, GitHub, AWS, Slack). Purely numeric values after a credential-looking name are left alone.
 * @param text {string} - Text to scan.
 * @returns {string} The text with credential values replaced.
 */
export declare function redactSecretAssignments(text: string): string;
/**
 * @description Replaces inline base64 data URLs with a size and MIME-type placeholder.
 * @param text {string} - Text to scan.
 * @returns {string} The text with each data URL payload replaced by `[N bytes mime/type]`.
 */
export declare function describeDataUrls(text: string): string;
/**
 * @description Tells whether an object key conventionally holds a binary payload.
 * @param key {string} - Property name.
 * @returns {boolean} `true` for keys such as `data`, `image`, `bytes` and `base64`.
 */
export declare function isBinaryKey(key: string): boolean;
/**
 * @description Reads the MIME type an object declares for its payload.
 * @param node {object} - Object that may carry `mimeType`, `mediaType`, `media_type` or `mime_type`.
 * @returns {string | undefined} The declared MIME type, or `undefined` when none is a string.
 */
export declare function declaredMimeType(node: object): string | undefined;
/**
 * @description Describes a binary payload by size instead of content.
 * @param value {ArrayBuffer | ArrayBufferView | string} - Raw bytes, or a base64 string long enough to be treated as bytes.
 * @param mimeType {string | undefined} - MIME type to include in the placeholder.
 * @returns {string | undefined} `[N bytes mime/type]`, or `undefined` when the value is not binary.
 */
export declare function binaryPlaceholder(value: ArrayBuffer | ArrayBufferView | string, mimeType: string | undefined): string | undefined;