import type { EmitContext } from "../commander.js";
/** bun if available (preferred), else npm. Both support `<runner> install` and `<runner> run <script>`. */
export declare function webRunner(): "bun" | "npm";
/**
 * Ensure a cached harnery checkout's `web/` exists for this version and return
 * its path, fetching (clone + install) on first use. Returns null on failure
 * (after emitting an actionable error).
 */
export declare function lazyFetchWebRoot(emit: EmitContext): string | null;
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