/**
 * Crude substring-overlap scorer shared by `preloadMemoryContext` (automatic
 * injection) and `search_memory` (explicit query). One scorer, so the same
 * query against the same string scores the same on both paths — a fact visible
 * in the prompt that cannot be found by searching for it is the drift two
 * separately-maintained copies would produce.
 *
 * The two paths still *select* differently on the same scores, deliberately:
 * preload falls back to showing everything when nothing scores, search returns
 * an empty list. They also score different corpora — preload scores raw facts,
 * search scores flattened `key: value` entries. Shared scoring, not shared
 * behaviour.
 *
 * **This scorer is not a pure extraction from `preloadMemory.ts`.** It added
 * the prefix fallback below, which widens what preload injects — see the
 * changeset. That was a deliberate change, and it is called out here because a
 * reader who assumes "moved, unchanged" will mis-predict preload's output.
 */
export declare const QUERY_TOKEN_MIN_LENGTH = 4;
/** Fraction of `query`'s tokens (>= QUERY_TOKEN_MIN_LENGTH chars) that appear in `text`, exactly or via a shared long prefix. */
export declare function lexicalScore(query: string, text: string): number;