/**
 * L1a task classification service.
 *
 *
 * Hybrid mechanism: signal-based heuristic + user override + audit log.
 *
 * Signal rules (per the spec, conservative defaults):
 *   - filesChanged >= feature_threshold_files OR linesChanged >= feature_threshold_lines
 *     AND touchesDependencies → 'migration'
 *   - touchesMigrationScripts → 'migration'
 *   - isPureRefactor AND linesChanged > 50 → 'refactor'
 *   - filesChanged >= feature_threshold_files OR linesChanged >= feature_threshold_lines
 *     → 'feature'
 *   - keywords contains 'fix' / 'bug' / 'broken' → 'bug'
 *   - filesChanged <= 3 AND linesChanged <= 5 → 'typo'
 *   - default → 'bug' (mid-low)
 *
 * Conservatism:
 *   - 'strict' promotes the result by one level
 *   - 'lax' demotes the result by one level
 *   - 'default' leaves it as-is
 *
 * Override (the user can force a level):
 *   - `peaks classify override --level <level> --reason "<text>"` writes
 *     to the audit log; cannot be downgraded (per spec: downgrade
 *     is always refused)
 */
import { type ClassifyResult, type ClassifySignals, type TaskLevel } from './classify-types.js';
import type { ClassifyConservatism } from '../preferences/preferences-types.js';
export interface ClassifyInput {
    readonly signals: ClassifySignals;
    readonly conservatism: ClassifyConservatism;
    /** When set, force the level (bypasses the heuristic). */
    readonly override?: {
        level: TaskLevel;
        reason: string;
    };
    /** Optional clock for testability. */
    readonly clock?: () => string;
}
export declare function classifyTask(input: ClassifyInput, featureThresholdFiles?: number, featureThresholdLines?: number): ClassifyResult;