import type { ExpressionAnnotation, MediaUpload } from './field-model';
import type { JsonSchema } from './types';
/**
 * Detect the media-upload annotations on a (ref-resolved) string schema. A field
 * opts into the upload control when it carries `contentEncoding: "base64"` plus a
 * `contentMediaType`, OR `format: "data-url"`. Anything else is a plain string.
 */
export declare function mediaUpload(schema: JsonSchema): MediaUpload | undefined;
/**
 * Detect the `x-tai42-expression` annotation on a (ref-resolved) string schema,
 * mirroring {@link mediaUpload}: a well-formed annotation opts the field into the
 * jq expression editor; anything else — absent, non-object, unknown language, or
 * any wrongly-typed member — yields `undefined`, so the field renders EXACTLY as
 * the plain string input it is today. Malformed payloads NEVER throw: a bad
 * annotation is a server-side authoring bug, and degrading to the ordinary text
 * box keeps the form usable while staying byte-identical to the unannotated
 * rendering.
 */
export declare function expressionAnnotation(schema: JsonSchema): ExpressionAnnotation | undefined;
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