/**
 * Long-form → multi-shorts orchestrator.
 *
 * The "1 hour podcast → 10 shorts" pipeline. Slides a window across a
 * transcript, asks the LLM to nominate up to 3 candidate clips inside
 * each window, then `score_clip`'s every nominee, dedups overlaps, and
 * returns the top-N.
 *
 * Pure helpers + the LLM proposal step live here so the tool wrapper
 * can stay thin. The ranking + dedup pass is plain TS — easy to unit
 * test without the network.
 */
import type { Transcript } from "./whisper.js";
export interface ViralCandidate {
    startSec: number;
    endSec: number;
    hookLine: string;
    suggestedTitle: string;
    suggestedCaption: string;
    why: string;
}
export interface ScoredCandidate extends ViralCandidate {
    score: number;
    hook: number;
    flow: number;
    engagement: number;
    trend: number;
    durationSec: number;
}
export interface WindowSpec {
    startSec: number;
    endSec: number;
    /** Transcript text within this window, already extracted. */
    text: string;
}
/**
 * Slice the transcript into overlapping windows. Each window covers
 * `windowSec` seconds with `overlapSec` spillover into the next so a
 * clip straddling a boundary can still be proposed by at least one
 * window. The dedup step later collapses duplicates.
 *
 * Pure — exported for unit testing.
 */
export declare function buildSlidingWindows(t: Transcript, windowSec: number, overlapSec: number): WindowSpec[];
/**
 * Dedup overlapping candidates: when two candidates overlap > 50% (of
 * the smaller), keep the higher-scoring one. Stable / sort-agnostic —
 * the function sorts internally before walking.
 *
 * Pure — exported for testing.
 */
export declare function dedupCandidates(cands: ScoredCandidate[]): ScoredCandidate[];
/**
 * Clamp candidate ranges to [0, totalSec] and to the requested duration
 * range. Drops candidates that fall outside or are degenerate.
 */
export declare function normalizeCandidates(cands: ViralCandidate[], totalSec: number, minSec: number, maxSec: number): ViralCandidate[];
export interface ProposeOptions {
    apiKey?: string;
    model?: string;
    durationRange: [number, number];
    signal?: AbortSignal;
}
export declare function proposeCandidates(window: WindowSpec, opts: ProposeOptions): Promise<ViralCandidate[]>;
/**
 * Tolerant parser. Drops malformed entries silently (we'd rather skip a
 * bad candidate than blow up the whole window).
 */
export declare function parseProposalResponse(content: string): ViralCandidate[];
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