import type { InteractionDecision, InteractionObservation, PluginConfig } from "@kuralle-syrinx/core";
export interface VapPredictor {
    initialize(cfg: PluginConfig): Promise<void>;
    push(frame: VapPredictorFrame): Promise<VapProbs>;
    reset(contextId: string): void;
    close(): Promise<void>;
}
export interface VapPredictorFrame {
    readonly contextId: string;
    readonly timestampMs: number;
    readonly channel: "user" | "assistant";
    readonly audio: Int16Array;
    readonly sampleRateHz: number;
}
export interface VapProbs {
    readonly pShift: number;
    readonly pBackchannel: number;
    readonly pHold: number;
}
export type VapTranscriptObservation = Extract<InteractionObservation, {
    kind: "stt_partial" | "stt_final";
}>;
export type VapTranscriptFusion = (probs: VapProbs, transcript: VapTranscriptObservation) => VapProbs;
export interface VapThresholds {
    readonly shift: number;
    readonly backchannel: number;
    readonly take: number;
    readonly hold: number;
}
export declare const DEFAULT_VAP_THRESHOLDS: VapThresholds;
export declare const ZERO_VAP_PROBS: VapProbs;
export interface VapDecisionContext {
    readonly ttsActive: boolean;
    readonly ttsContextId: string;
    readonly delegateInFlight: boolean;
}
export declare function decideFromProbs(probs: VapProbs, ctx: VapDecisionContext, thresholds?: VapThresholds): readonly InteractionDecision[];
/** Conservative transcript evidence used by the C6 VAP+STT arm. */
export declare function semanticTranscriptFusion(probs: VapProbs, transcript: VapTranscriptObservation): VapProbs;
export declare class RollingFeatureBuffer {
    private readonly maxSamples;
    private readonly storage;
    private length;
    private writeIndex;
    constructor(maxSamples?: number);
    append(audio?: Int16Array): void;
    /** Returns an immutable chronological copy suitable for async inference. */
    snapshot(): Float32Array;
    reset(): void;
}
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