/**
 * @sharpee/platform-browser/channels/info — `info` and `ifid` channel
 * renderers.
 *
 * Owner context: browser default. Implements ADR-165 §8 info-channel
 * behavior: set the document title from the story info payload, and
 * write the IFID to a meta region (typically hidden).
 */
import type { ChannelRenderer } from '@sharpee/channel-service';
export interface InfoChannelRendererOptions {
    /**
     * Document object whose `title` is updated. Defaults to the
     * `slot.ownerDocument`. Tests pass an explicit `Document` so they
     * can assert on the title without touching the test runner's
     * window.
     */
    doc?: Document;
}
/**
 * `info` channel — replace, json. Full story metadata.
 *
 * The renderer sets `document.title` from `value.title` and projects
 * every non-empty payload field as a `data-<field>` attribute on the
 * slot. Stories or author scripts query the slot for the fields they
 * want to display (about dialog, footer credits, etc.).
 *
 * Fields handled:
 *  - `title` → `document.title` and `data-title`
 *  - `author` → `data-author`
 *  - `version` → `data-version`
 *  - `description` → `data-description`
 *  - `buildDate` → `data-build-date`
 *  - `engineVersion` → `data-engine-version`
 *  - `clientVersion` → `data-client-version`
 *
 * Empty fields are skipped (the channel closure already filters
 * empties); the renderer does not clear stale attributes between
 * emissions because story info is stable across a session.
 */
export declare function createInfoChannelRenderer(slot: HTMLElement, opts?: InfoChannelRendererOptions): ChannelRenderer;
/**
 * `ifid` channel — replace, text. Writes the IFID to a `data-ifid`
 * attribute on the slot. Typically not visible — stories query it
 * through the DOM if they need it.
 */
export declare function createIfidChannelRenderer(slot: HTMLElement): ChannelRenderer;
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