/**
 * Template-strings interning.
 *
 * lit-html keys its template cache by the object identity of the
 * `TemplateStringsArray`, so when Vite HMR re-executes a module, every
 * template literal produces a fresh array and lit rebuilds the entire DOM
 * subtree. Interning canonicalizes strings arrays by content: unchanged
 * templates keep their identity across re-execution, so only the edited
 * template rebuilds its part.
 *
 * This module is dependency-free and must stay safe to load in any
 * environment (it is injected into user modules in dev).
 */
/**
 * Returns the canonical strings array for `strings` within namespace `ns`.
 *
 * The first genuine `TemplateStringsArray` seen for a given content becomes
 * the canonical array; later content-equal arrays map onto it. Non-template
 * input (anything without a `raw` array) passes through untouched so lit
 * can raise its own error.
 */
export declare const intern: (ns: string, strings: TemplateStringsArray) => TemplateStringsArray;
/**
 * Wraps a template tag so its strings argument is interned in `ns`.
 */
export declare const wrapTag: <T extends (strings: TemplateStringsArray, ...values: never[]) => unknown>(tag: T, ns: string) => T;
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