import type { JsonValue } from './types.js';
/**
 * Convert `openai/widgetCSP` snake_case object to MCP Apps `_meta.ui.csp` camelCase.
 */
export declare function widgetCspSnakeToUiCsp(openaiCsp: unknown): Record<string, JsonValue> | undefined;
/**
 * `_meta.ui` block (no resourceUri) from widget resource metadata.
 */
export declare function buildUiMetaBlockFromWidgetResourceMeta(widgetMeta: Record<string, unknown> | undefined): Record<string, JsonValue> | undefined;
/**
 * Full `_meta.ui` for tool descriptors: resourceUri plus optional csp / domain / prefersBorder.
 */
export declare function mergeToolUiMeta(resourceUri: string, widgetMeta: Record<string, unknown> | undefined): Record<string, JsonValue>;
/**
 * `contents[]._meta` for resources/read (MCP Apps + OpenAI passthrough keys).
 */
export declare function buildResourceReadContentsMeta(widgetMeta: Record<string, JsonValue> | undefined): Record<string, JsonValue> | undefined;
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