import { URI } from '@theia/core';
export declare const FileReadTracker: unique symbol;
/** Tracks the content an agent has seen per chat session, so that changes by anyone else can be reported back to it. */
export interface FileReadTracker {
    /** Snapshots `uri` as the session's agent just saw it, or forgets it if it is gone. Pass `content` when at hand to save a read. */
    recordRead(sessionId: string, uri: URI, content?: string): Promise<void>;
    /** Whether `uri` differs from what the session's agent last saw. `false` if never read or gone: neither holds content a write could discard. */
    isStale(sessionId: string, uri: URI): Promise<boolean>;
    /** Files changed since the session's agent read them, reported again until it reads them anew so an ignored notice cannot get lost. */
    getChangedFiles(sessionId: string): Promise<string[]>;
}
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