/**
 * How long the iframe stays at zero size before it is grown.
 *
 * The window this has to hit: long enough for the game to boot and construct its renderer against
 * the 0-size viewport (which floors it to 1x1), short enough that the grow still lands before the
 * first rendered frame — that ordering is what makes the engine's size self-heal call
 * onWindowResize while the post chain is still uninitialised. Too early and there is no renderer
 * to mis-size; too late and the first frame has already rendered and the hazard is gone.
 */
export declare const SMOKE_FRAME_GROW_MS = 400;
/**
 * A local page that loads the published bundle the way the portal does.
 *
 * The portal embeds a published game in an iframe, and a cold start there begins with a 0-size
 * viewport. Three of the four defects found in Phase 5's manual gate were invisible to a direct
 * navigation:
 *
 *   - a wrong Content-Type makes the iframe DOWNLOAD instead of render, so no canvas ever appears
 *     and there is no console error at all;
 *   - the bloom `invSize` crash needs the renderer to be resized before its first rendered frame,
 *     which only happens when the viewport diverges from the renderer's size;
 *   - a canvas that is never claimed by a renderer keeps the 300x150 HTML default.
 *
 * Loading the URL directly reproduces none of the first two. This does.
 */
export declare function renderSmokeHarness(publishedUrl: string): string;