/**
 * Shared string helpers used across components. Single source of truth so the
 * same formatting rules apply to every key/label/title that surfaces in the
 * shadow tree.
 *
 *  - `lookupKey`: the ONE normalizer every lookup table in this library is keyed
 *    and read by (`tokens/index.ts` glyphs and abbreviations, `i18n/` chrome
 *    strings).
 *  - `capitalize`: title-cases the first character, lowercases the rest. A
 *    DISPLAY helper only; it is not a lookup key (see `lookupKey`).
 *  - `humanize`: turns an API key (`birth_date`, `birthDate`, `mahadasha-end`)
 *    into a label suitable for display ("Birth date", "Mahadasha end").
 */
/**
 * Fold a name to the canonical key its lookup table is stored under: lower case, every run of spaces, underscores and hyphens collapsed to one space, trimmed.
 *
 * @remarks
 * This exists because a GUESSED key spelling is a defect class this repo has now shipped twice. The glyph tables were keyed off whatever {@link capitalize} happened to produce (`North node`), while the API returns `North Node`, so every call site that reached the table without first calling `capitalize` missed and fell through to a fabricated abbreviation. Aspects hit the same wall from the other side: `/aspects` returns `SEMI SEXTILE` where synastry returns `SEMI_SEXTILE`.
 *
 * One normalizer, applied when a table is DEFINED and again when it is READ, removes the whole class: no call site has to remember a convention, and no table has to guess a spelling. Use it for every new table keyed by an API-supplied name.
 *
 * @example
 * ```ts
 * lookupKey('North Node');    // 'north node'
 * lookupKey('SEMI_SEXTILE');  // 'semi sextile'
 * lookupKey('semi-sextile');  // 'semi sextile'
 * ```
 */
export declare function lookupKey(s: string): string;
export declare function capitalize(s: string): string;
export declare function humanize(s: string): string;
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