/**
 * The screen VM, on a WebAssembly module the host compiled at deploy time.
 *
 * The default engine is the SINGLE-FILE build, where the WebAssembly rides
 * inside the JavaScript as a base64 string and is compiled from those bytes at
 * runtime (contract/genui/component/boot.ts:73-88). workerd does not allow that:
 * a Worker may only instantiate a `WebAssembly.Module` that its own deployment
 * imported. So the edge leg takes the module as an ARGUMENT and wraps the
 * wasmfile variant around it — the platform's import stays the platform's, and
 * this package never touches a `.wasm` file.
 *
 * ONE VARIANT PER ISOLATE, held right here at module scope. `warmScreenEngine`
 * memoizes an engine per variant in an unbounded `Map` with no eviction
 * (boot.ts:68), so a host that built a fresh variant per request would leak a
 * whole QuickJS module every time. A module-level slot makes that unreachable:
 * a deployment has one `.wasm`, so it gets one variant and one engine, whatever
 * a caller does with `edgeToolchain`.
 */
import { type CustomizeVariantOptions } from "quickjs-emscripten-core";
import { type ScreenBudget, type ScreenEngineVariant } from "../../contract/genui/component/index.js";
import type { ScreenPaintInput, ScreenPaintResult } from "../checking/toolchain.js";
/** The deploy-time module, typed off the dependency: this package compiles
 *  against ES2022 with no DOM, so it has no `WebAssembly` namespace to name. */
export type EdgeWasmModule = NonNullable<CustomizeVariantOptions["wasmModule"]>;
/** A PROMISE, and one per module rather than one per call: `warmScreenEngine`
 *  keys its engine memo on this object, so a stable key is what makes the engine
 *  stable too. */
export declare const edgeVariant: (wasmModule: EdgeWasmModule) => ScreenEngineVariant;
/** A copy of the Node leg's paint (checking/toolchain.ts) down to the sentence,
 *  differing only in which engine is warmed and which budget stops a runaway. */
export declare const edgePaint: (wasmModule: EdgeWasmModule, budget: ScreenBudget, input: ScreenPaintInput) => Promise<ScreenPaintResult>;
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