/**
 * Shared content normalization helpers used across hook implementations.
 *
 * Centralizes strip-and-truncate logic to ensure consistent behaviour
 * in before-compaction and session-end hooks.
 */
/** Soft character limit for the content field (server hard limit: 10,000). */
export declare const CONTENT_MAX_CHARS = 6000;
/**
 * Strip `<engram-context>` blocks from `text` and truncate to {@link CONTENT_MAX_CHARS}.
 *
 * @param content - Raw serialized conversation text.
 * @returns Normalized content safe for the engram backfill API.
 */
export declare function normalizeEngramContent(content: string): string;
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