/**
 * Hook rewriter.
 *
 * Given a current hook + topic + (optional) transcript context + a target
 * pattern from the `viral-hook-patterns` skill, produce 3 candidate
 * rewrites. ONE LLM call. The agent surfaces candidates to the user;
 * we never auto-apply (we don't generate footage).
 *
 * The 12 patterns below are the compact form of the skill — name +
 * one-line structure each. Plenty for the LLM; not enough to bloat the
 * prompt.
 */
export declare const HOOK_PATTERNS: readonly ["click-to-unpause", "shock-intrigue-satisfy", "foreshadow-ending", "but-so-escalation", "power-word", "crazy-progression", "match-thumbnail", "i-asked-google", "credibility-plus-n", "cliffhanger", "first-frame-thumbnail", "auto"];
export type HookPattern = (typeof HOOK_PATTERNS)[number];
export interface HookCandidate {
    line: string;
    pattern: string;
    why: string;
}
export interface HookRewriteResult {
    candidates: HookCandidate[];
    chosenPattern: string;
    why: string;
}
export interface RewriteOptions {
    apiKey?: string;
    model?: string;
    signal?: AbortSignal;
}
export interface RewriteInput {
    currentHook: string;
    videoTopic: string;
    transcriptExcerpt?: string;
    pattern: HookPattern;
}
/**
 * Run ONE LLM call. Throws on parse / network error so the wrapper
 * converts to err().
 */
export declare function runHookRewrite(input: RewriteInput, opts?: RewriteOptions): Promise<HookRewriteResult>;
/**
 * Parse the model's JSON. Robust to missing keys; pads to exactly 3
 * candidates so the caller always has a stable shape.
 *
 * Pure — exported for testing.
 */
export declare function parseRewriteResponse(content: string, requestedPattern: HookPattern): HookRewriteResult;
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