/**
 * Plan-time validators for the distributed render pipeline. Each validator
 * is invoked before freezing the plan, so banned configurations fail fast
 * with a typed non-retryable error instead of being baked into a planDir
 * and only surfacing on the chunk worker.
 */
/**
 * Re-export the BROWSER_GPU_NOT_SOFTWARE code so distributed adapters and
 * Step Functions / Temporal retry policies can match it without a
 * cross-package import.
 */
export { BROWSER_GPU_NOT_SOFTWARE } from "@hyperframes/engine";
/**
 * Re-export the shared font-family parser. The plan-time validator and the
 * @font-face injector consume the same surface, so the parser lives next to
 * the data.
 */
export { parseFontFamilyValue } from "../deterministicFonts.js";
/**
 * Typed plan-validation error. Workflow adapters key retry policies off the
 * `code` field to mark errors as non-retryable.
 */
export declare class PlanValidationError extends Error {
    readonly code: string;
    constructor(code: string, message: string);
}
/**
 * Subset of the merged plan / engine / render config that the GPU validator
 * inspects. Both `useGpu` (RenderConfig) and `browserGpuMode` (EngineConfig)
 * are optional so callers can pass any of the surrounding config shapes
 * without an adapter layer.
 *
 *   - `useGpu === true` → encoder GPU acceleration (NVENC/QSV/VAAPI). Banned
 *     because GPU encoders produce non-byte-identical output across machines.
 *   - `browserGpuMode !== "software"` → headless Chrome's WebGL is allowed
 *     to use hardware GL. Banned because hardware GL is bitwise unstable
 *     across drivers. Pairs with the runtime `assertSwiftShader` check that
 *     catches workers whose environment ignores Chrome's `--use-gl=swiftshader`.
 */
export interface ValidateNoGpuEncodeInput {
    useGpu?: boolean;
    browserGpuMode?: string;
}
/**
 * Typed code for {@link validateNoSystemFonts}. Distributed chunk workers
 * render in a Linux container without host-OS fonts; compositions declaring
 * `-apple-system` / `system-ui` as a primary family would render differently
 * on the worker, breaking byte-identical retries.
 */
export declare const SYSTEM_FONT_USED = "SYSTEM_FONT_USED";
/**
 * Reject any config that would let GPU encode or hardware-GL slip into a
 * distributed render. Throws {@link PlanValidationError} with
 * `code === BROWSER_GPU_NOT_SOFTWARE` when either gate trips. The message
 * names the offending field so the caller can surface a clean error.
 */
export declare function validateNoGpuEncode(config: ValidateNoGpuEncodeInput): void;
/**
 * Reject a compiled HTML document whose top-priority font-family resolves to
 * a host-OS / generic family. Throws {@link PlanValidationError} with
 * `code === SYSTEM_FONT_USED` and the offending family in the message.
 *
 * Inspects the FIRST entry of each font-family declaration: that's the
 * family the browser tries to use. Subsequent entries are CSS fallbacks,
 * and a generic fallback is fine and conventional — so
 * `font-family: "Inter", -apple-system, sans-serif` passes and
 * `font-family: -apple-system, BlinkMacSystemFont, "Segoe UI"` fails.
 *
 * Reads font-family surfaces via `iterateFontFamilyDeclarations` so the
 * @font-face injector and this validator scan the same regions.
 */
export declare function validateNoSystemFonts(compiledHtml: string): void;
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