import type { InboxEntry } from '../core/feed/inbox.js';
interface InputEventLike {
    type: 'input';
    text: string;
    images?: unknown[];
    source: 'interactive' | 'rpc' | 'extension';
}
type InputEventResultLike = {
    action: 'continue';
} | {
    action: 'transform';
    text: string;
    images?: unknown[];
} | {
    action: 'handled';
};
interface PiLike {
    on: (event: 'input', handler: (event: InputEventLike, ctx: any) => InputEventResultLike | void) => void;
}
/**
 * Render drained passive entries (oldest first) into one XML pre-text block.
 * Each accumulated message is its own timestamped `<update>` element.
 */
export declare function formatPassive(entries: InboxEntry[]): string;
/**
 * Register the passive-context drain on `pi`.
 *
 * Returns immediately (inert) when CRTR_NODE_ID is absent. The `input` handler
 * is the whole extension: drain on every message, prepend when non-empty.
 */
export declare function registerCanvasPassiveContext(pi: PiLike): void;
export default registerCanvasPassiveContext;