/**
 * Minimal XML escaping for folding untrusted text into an XML-shaped block.
 *
 * Memory entries and other injected content are frequently user-derived, so interpolating them raw
 * into `<entry>…</entry>` both breaks the block structurally (a stray `</entry>` or `"`) and opens a
 * stored-prompt-injection surface. These helpers are deliberately tiny — enough to keep a `<memory>`
 * block well-formed, not a general-purpose serializer.
 */
/**
 * Escapes text content for placement between XML tags: `&` (first, so later replacements are not
 * double-escaped), then `<` and `>`.
 *
 * @param value - The raw text to escape
 * @returns The escaped text, safe to place in element content
 * @internal Used by the memory default formatter
 */
export declare function escapeXmlText(value: string): string;
/**
 * Escapes a value for placement inside a double-quoted XML attribute: the {@link escapeXmlText} rules
 * plus `"` and `'`.
 *
 * @param value - The raw attribute value to escape
 * @returns The escaped value, safe to place inside a quoted attribute
 * @internal Default-format helper; not part of the public surface.
 */
export declare function escapeXmlAttr(value: string): string;
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