import type { EffectivenessScore } from '../../domain/loop/effectiveness-score.js';
import type { SessionTrace } from '../../domain/loop/session-trace.js';
import type { InsightPattern } from '../../domain/loop/insight-pattern.js';
import type { BehaviorEventEmitter } from '../behavior/behavior-event-emitter.js';
/**
 * Group traces by compactionStrategies[0]. Compute avg score per strategy.
 * If one strategy avg is >10 points higher with 3+ samples, emit pattern.
 */
export declare function extractCompactionAffinity(scores: readonly EffectivenessScore[], traces: readonly SessionTrace[]): InsightPattern | null;
/**
 * Bucket traces by token usage ratio (tokensUsed/tokenBudget) in 10% bands.
 * Find band with highest avg score. If 3+ samples, emit pattern with recommended threshold.
 */
export declare function extractBudgetSweetSpot(scores: readonly EffectivenessScore[], traces: readonly SessionTrace[]): InsightPattern | null;
/**
 * For each unique skill in traces, compare avg score with/without it.
 * If difference >10 with 3+ samples each, emit pattern for the most impactful skill.
 */
export declare function extractSkillEffectiveness(scores: readonly EffectivenessScore[], traces: readonly SessionTrace[]): InsightPattern | null;
/**
 * Filter scores below 50. If 3+ low-scoring sessions share budgetExceeded=true, emit pattern.
 */
export declare function extractFailureModes(scores: readonly EffectivenessScore[], traces: readonly SessionTrace[]): InsightPattern | null;
/**
 * If 5+ traces have zero skillsInvoked, emit a 'pack_gap' pattern suggesting skill installation.
 */
export declare function extractPackGaps(traces: readonly SessionTrace[]): InsightPattern | null;
/**
 * Reads scores and traces, runs all extractors, filters out nulls.
 * Accepts an optional emitter to emit loop.pattern.extracted after extraction.
 */
export declare function extractPatterns(workspaceRoot: string, emitter?: BehaviorEventEmitter): Promise<readonly InsightPattern[]>;
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