import type { StreamEvent } from '../../../shared/types/provider.js';
import type { CompanionDiff } from './diff-reader.js';
export declare const COMPANION_CHANGE_DEBOUNCE_MS = 250;
export interface CompanionChangeCandidate {
    readonly reason: 'quiet' | 'forced' | 'completion' | 'commit';
    readonly observedGeneration: number;
}
export interface CompanionChangeTrigger extends CompanionChangeCandidate {
    readonly snapshot: CompanionDiff;
}
export type CompanionChangeSkipReason = 'empty_diff' | 'unchanged_digest' | 'below_minimum_changed_lines';
export declare class CompanionChangeDetector {
    private readonly intervalMs;
    private readonly minimumChangedLines;
    private readonly now;
    private readonly readDiff;
    private dirtySince;
    private lastChangeAt;
    private lastReviewedDigest;
    private generation;
    private immediateGeneration;
    constructor(input: {
        intervalMs: number;
        minimumChangedLines: number;
        now: () => number;
        readDiff: () => Promise<CompanionDiff>;
    });
    observe(event: StreamEvent): boolean;
    observeCommit(): void;
    observeSnapshotChange(before: CompanionDiff, after: CompanionDiff): boolean;
    isDirty(): boolean;
    getObservedGeneration(): number;
    markReviewed(snapshot: CompanionDiff, observedGeneration: number): void;
    getTriggerCandidate(quietIntervalMs: number): CompanionChangeCandidate | undefined;
    getCompletionCandidate(): CompanionChangeCandidate;
    evaluateCandidate(candidate: CompanionChangeCandidate, providedSnapshot?: CompanionDiff, onSkipped?: (reason: CompanionChangeSkipReason) => void): Promise<CompanionChangeTrigger | undefined>;
    private consumeThrough;
    private isMutatingTool;
}
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