import type { LanguageModelV4Prompt } from "@ai-sdk/provider";
import type { Modality } from "./types.js";
/**
 * Scan a model-level prompt (`LanguageModelV4Prompt`, spec v4 — what the AI SDK
 * passes into `doGenerate`/`doStream`) and report which input modalities appear.
 *
 * V4 details that matter here:
 *  - File input is a content part with `type: 'file'` (`LanguageModelV4FilePart`).
 *  - The IANA media type lives in `part.mediaType` (NOT `mimeType`).
 *  - `mediaType` may be a full `type/subtype` (e.g. `image/png`), a bare
 *    top-level segment (e.g. `image`), or an `image/*` wildcard. We normalize
 *    via `getTopLevelMediaType()` so all three forms work.
 *  - PDF is `application/pdf` (top-level `application`), so it is special-cased
 *    rather than matched by top-level prefix.
 *  - `part.data` is a tagged union (`SharedV4FileData`); irrelevant for
 *    modality routing — we only read `mediaType`.
 *  - Only `user`/`assistant` messages carry input parts; `system` content is a
 *    plain string (pure text).
 */
export declare function detectModalities(prompt: LanguageModelV4Prompt): Set<Modality>;
/**
 * True iff every modality in `required` is present in the entry's `supports`.
 *
 * An omitted (`undefined`) `supports` means the entry is a universal candidate
 * that matches ANY modality — it is never filtered out.
 */
export declare function supportsAll(supports: Modality[] | undefined, required: Set<Modality>): boolean;