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[];
/**
 * Answer-side spellings, before numeric canonicalization, for precision and
 * exactly-two-endpoint ranges. Ordinary tokenization remains unchanged on the
 * evidence and exemption sides. A non-range en-dash token is split normally by
 * the caller after it has declined the range grammar.
 */
export declare function answerTokenSpellings(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.
 *
 * Deliberately NOT here (9.110.0): a glued-unit number's bare form. Applied
 * on the INDEX side it would let a result's `latency 2024ms` ground an
 * answer's prose year `2024`, which weakens the gate; the glued spelling is
 * met on the LOOKUP side only, by the candidate that came from one
 * (`evidence/extract.ts · candidateForms`).
 */
export declare function lookupForms(normalized: string): readonly string[];
/**
 * The one spelling every equivalent value shares — the LAST of
 * `lookupForms`, so `0xef0101` and `ef0101` both canonicalise to `ef0101`.
 * A reader that must file one thing per VALUE (`findings/contingent.ts`,
 * one row per value per moment) keys on this rather than on the spelling
 * the model happened to use.
 */
export declare function canonicalForm(normalized: string): string;
/** Text as compared: Unicode NFC, trimmed, every run of white space one space. */
export declare const textOf: (value: string) => string;
/**
 * A full Unicode case fold WITHOUT the Turkic mappings: each character
 * upper- then lower-cased on its own (so `ß` and `ẞ` fold to `ss`, `fi` to
 * `fi`, a final `ς` to `σ`), except the dotless `ı`, which stays `ı`. It
 * never decides agreement (`caseOnly` does, on the letters as written): two
 * texts it folds alike are only texts the comparison cannot tell apart.
 */
export declare const foldCase: (text: string) => string;
/**
 * A text's bare letters: compatibility forms unified (NFKC: a ligature, the
 * long s, a full-width letter, a superscript digit), case folded, every mark
 * dropped (an accent, the Greek tonos, the dot over `İ`) and the dotless
 * `ı` read as `i`. Only to tell texts that differ in no letter from a
 * contradiction: two texts alike here are never compared.
 */
export declare const bareLetters: (text: string) => string;
export declare const hasDigit: (text: string) => boolean;
/** How a word is cased: all lower, all upper, a capital first letter, or mixed. */
export declare function casing(word: string): 'lower' | 'upper' | 'capitalized' | 'mixed';
/**
 * A word the case rule compares across casings (`caseOnly`): letters only,
 * more than three of them, cased all lower, all upper or with a capital first
 * letter. The rule cannot tell where such a word's case carries meaning
 * (`Polish`, `polish`). A short word (`MW`, `Co`), a mixed-case one
 * (`aB3xZ9`, `iPhone`) and anything with a digit or another mark keeps its
 * case as written.
 */
export declare const foldableWord: (word: string) => boolean;
/**
 * Two word texts that differ in case alone: as many words, and every word
 * that differs is a foldable word with the same letters, letter for letter,
 * in another case — its locale-free lower case (`toLowerCase`) is the
 * other's: `Settled` and `SETTLED`, `STRAẞE` and `Straße` (`ẞ` is the capital
 * of `ß`). Letters are compared as written, before any fold, so `ß` is never
 * `ss`: `Masse`, `maße`, `MAẞE` and `MASSE` against `Maße` differ in letters.
 */
export declare function caseOnly(a: string, b: string): boolean;
/**
 * Whether two names are ONE name: the same text (`textOf`), or texts with no
 * digit that differ in the case of foldable words alone (`caseOnly`) — the
 * claim comparator's `agrees`. `payments` / `PAYMENTS` are one name;
 * `ARRAY-X9` / `array-x9` (a digit), `MW` / `mW` (a short word) and `iPhone` /
 * `iphone` (mixed case) are not.
 *
 * @example
 * ```ts
 * sameName('Payments', 'payments'); // true
 * sameName('MW', 'mW');             // false
 * ```
 */
export declare function sameName(a: string, b: string): boolean;
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