/**
 * Deterministic pool_discovery question synthesis (IND-418).
 *
 * A mined discriminator already carries everything a question needs: a label,
 * a question seed, 2–3 sides, and verified per-candidate assignments. This
 * module turns the top discriminator into a `Question` payload + server-side
 * pool snapshot with ZERO generation-time LLM calls — the phrasing was
 * produced (and evidence-verified) at mining time, so synthesis is pure,
 * auditable, and cheap to re-run for interview-mode chaining.
 */
import type { Question, QuestionPoolDiscriminator, QuestionPoolSnapshot } from "../../questions/domain/question.schema.js";
import type { ScoredDiscriminator } from "./discriminator.types.js";
/** Fixed option appended to every pool question — the no-preference escape. */
export declare const BOTH_MATTER_LABEL = "Both matter";
/**
 * Converts a scored discriminator into the compact snapshot form stored on
 * the question row (verified assignments only; unknowns dropped).
 */
export declare function toQuestionDiscriminator(d: ScoredDiscriminator): QuestionPoolDiscriminator;
/**
 * Filters a mining pass down to question-eligible discriminators:
 * VoI ≥ {@link POOL_QUESTION_MIN_VOI}, evidenceRate ≥
 * {@link POOL_QUESTION_MIN_EVIDENCE_RATE}, capped at
 * {@link POOL_QUESTION_MAX_DISCRIMINATORS}. Input is already VoI-sorted.
 */
export declare function selectQuestionDiscriminators(discriminators: ScoredDiscriminator[]): ScoredDiscriminator[];
/** Input for one question synthesis. */
export interface SynthesizePoolQuestionInput {
    /** The discriminator to ask about (already eligibility-filtered). */
    discriminator: QuestionPoolDiscriminator;
    /** Remaining ranked eligible discriminators (interview-mode chain stash). */
    alternates: QuestionPoolDiscriminator[];
    poolSize: number;
    /** Exact bounded candidate opportunity IDs supplied to this synthesis pass. */
    opportunityIds: string[];
    /** ISO-8601 timestamp of the mining pass. */
    minedAt: string;
    /** Discovery run id, when known. */
    runId?: string;
    /**
     * Intent payload snippet — folded into the evidence chip so the question
     * self-identifies on any surface ("based on 16 people matching ‘…’").
     */
    intentText?: string;
    /** Stable hash of the full normalized intent payload + summary. */
    intentFingerprint?: string;
}
/** Synthesized question: client payload + server-side snapshot. */
export interface SynthesizedPoolQuestion {
    payload: Question;
    pool: QuestionPoolSnapshot;
}
/**
 * Builds the pool_discovery question. Returns null when the pool is below
 * the k-anonymity floor or the discriminator shape is unusable (guards are
 * duplicated here so no caller can bypass them).
 */
export declare function synthesizePoolQuestion(input: SynthesizePoolQuestionInput): SynthesizedPoolQuestion | null;