/**
 * Verbosity-steer nudge: inject a tiered conciseness nudge when context is
 * under pressure. Mirrors the Python `run_verbosity_steer` function in
 * measure.py.
 *
 * Tiered messaging:
 *   25-74% fill (quality is not a condition)  → gentle nudge
 *   75-89% fill                           → strong nudge with specific directives
 *   90%+ fill                             → suppressed (adding tokens makes it worse)
 *
 * Cooldown: max 3 nudges per session, 5 min between nudges.
 * Shares the same nudge_count / last_nudge_time fields as the quality nudge
 * so the two features share a single cooldown counter.
 */
import type { SessionStore } from "../storage/session-store.js";
export interface VerbositySteerResult {
    shouldNudge: boolean;
    message: string | null;
    tier: "gentle" | "strong" | "suppressed" | "none";
}
export declare function checkVerbositySteer(store: SessionStore, fillPct: number, qualityScore: number): VerbositySteerResult;
/**
 * Estimate output token savings from a verbosity-steer nudge.
 * The nudge causes the model to produce ~10-15% fewer output tokens
 * on affected responses. Returns [tokensSaved, tier] for logging.
 */
export declare function verbositySteerSavingsEstimate(fillPct: number): [number, string];
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