/** Numeric sort key. Plain string sort puts 8.9.0 after 22.1.0. */
export declare function versionKey(version: string): number;
/** Compare two version strings. */
export declare function compareVersions(a: string, b: string): number;
/**
 * Pick the bundled schema version to use for a version read from a file.
 *
 * IDF files write `Version, 9.0;` while schemas are keyed `9.0.1`, so an exact
 * match often fails on the patch component. Matching on major.minor first is
 * what makes "support every version" actually work against real files rather
 * than only against files whose patch number happens to line up.
 *
 * Returns undefined rather than guessing when there is no match at all;
 * silently loading the wrong schema would mis-map every positional field.
 */
export declare function resolveVersion(detected: string, available: readonly string[]): string | undefined;
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