/**
 * normalize — one spelling for one value, on BOTH sides of the comparison.
 *
 * Pattern: a pure leaf module (no imports), shared by the extractor and the
 *          evidence index so the two can never disagree about what "the same
 *          value" means.
 * Role:    core/ layer, `namesAndNumbersFromEvidence` only.
 * Emits:   N/A.
 *
 * ## Why this file exists at all
 *
 * The answer is prose and the evidence is JSON. The same fact is spelled
 * differently in each: a tool returns the NUMBER `41200`, and the model writes
 * `41,200 IOPS.` — with a thousands separator, a unit and a full stop. A naive
 * matcher calls that fabricated, which is the worst failure this feature can
 * have: a false accusation costs a real turn under `guard` and refuses a good
 * answer under `rails`.
 *
 * So every value passes through {@link normalizeToken} before it is compared,
 * on the answer side AND on the evidence side. The rules are deliberately few
 * and each is here because a real spelling difference needed it.
 */
/**
 * Reduce one raw token to the form both sides compare on.
 *
 * Returns `''` for a token that is nothing but decoration — callers drop those.
 */
export declare function normalizeToken(raw: string): string;
/** How many digit characters a string carries. */
export declare function countDigits(v: string): number;
/**
 * Split free text into candidate tokens.
 *
 * Used on the answer (to find values to ground) and on any tool-result text
 * that is not JSON. Token boundaries are the whole point: a value that appears
 * only as a SUBSTRING of an unrelated field must not read as grounded, so
 * matching is always token-exact and never substring.
 */
export declare function tokenize(text: string): string[];
/**
 * The spellings of one normalized value that count as the SAME value when
 * looking it up.
 *
 * Only one rule so far, and it is a real one: an FCID is read off a switch as
 * `0xef0101` and quoted back sometimes as `ef0101`. Both sides expand, so the
 * prefix can be dropped by either the tool or the model without either being
 * accused of inventing it.
 */
export declare function lookupForms(normalized: string): readonly string[];