/**
 * Classic-parity source material for /compact (and auto-compact).
 *
 * Builds a structured plain-text record of the visual transcript so the
 * summarizer sees user prompts, tools (with outputs), assistant answers, and
 * prior compacted memory — not a sparse semantic export that drops tool bodies.
 *
 * When a prior `compacted` card exists, only that card and everything after it
 * are included (the memory already covers earlier turns).
 */
import type { ToolCallId } from "../../app/events/app-event.js";
import { type TranscriptState } from "./transcript-types.js";
export type ToolOutputLookup = (toolCallId: ToolCallId) => string;
/**
 * Serialize the live v2 transcript for the compaction summarizer.
 * Prefer this over raw semantic export so tool outputs and prior memory land
 * in the summary prompt.
 */
export declare function serializeTranscriptForCompaction(state: TranscriptState, toolOutput?: ToolOutputLookup): string;
/**
 * Merge visual session material with older model-history turns so /compact
 * after /history (+ optional new prompts) always sees the full picture.
 */
export declare function mergeCompactionSourceMaterial(sessionTranscript: string | undefined, olderModelTurns: string): string;