export interface FileChange {
    file_path: string;
    device?: string;
    mode: 'net' | 'degraded' | 'no-diff';
    unifiedDiff: string;
}
/** Read modified file paths from session-activity JSONL for a given session ID.
 *  Collects both edit_file and write_file events, deduplicates, returns unique paths. */
export declare function getModifiedFilesFromSession(sessionId: string | null | undefined): string[];
/** Compute net unified diffs for every (device, file_path) touched in a session.
 *  Returns one entry per file, ordered by first-touch time. */
export declare function getSessionFileChanges(sessionId: string | null | undefined): FileChange[];
/** Render FileChange[] as markdown with fenced ```diff blocks per file. Empty when changes is empty. */
export declare function renderModifiedFilesWithDiff(changes: FileChange[]): string;
/** Read the artifact file content for a thread */
export declare function readArtifact(threadId: string): string | null;
/** Remove the workspace directory for a thread */
export declare function cleanupWorkspace(threadId: string): void;