/**
 * Local Gate Engine — pure logic for offline gate pipeline governance.
 *
 * Ports the Python GateEngine's validation rules to TypeScript.
 * All methods are pure: operate on pipeline objects, return new objects, no I/O.
 */
import type { GatePipeline } from './types.js';
export interface GateCheckResult {
    ready: boolean;
    missing_evidence: string[];
    missing_roles: string[];
}
export interface ReleaseCheckResult {
    can_release: boolean;
    pending_gates: string[];
    failed_gates: string[];
    passed_gates: string[];
    skipped_gates: string[];
}
export declare class GateEngineError extends Error {
    constructor(message: string);
}
export declare class LocalGateEngine {
    /** Create a new gate pipeline from a template. */
    createPipelineFromTemplate(changesetId: string, projectId: string, riskScore: number, templateGates: Array<{
        id: string;
        name: string;
        required_evidence: string[];
        required_roles?: string[];
    }>): GatePipeline;
    /** Check if a gate's requirements are met. */
    checkGate(pipeline: GatePipeline, gateId: string): GateCheckResult;
    /** Promote a gate (mark as passed). Validates ordering, evidence, and roles. */
    promoteGate(pipeline: GatePipeline, gateId: string, promotedBy: string): GatePipeline;
    /** Reject a gate. Sets status to failed with reason. */
    rejectGate(pipeline: GatePipeline, gateId: string, reason: string, rejectedBy: string): GatePipeline;
    /** Skip a gate. Only allowed if risk_score <= 50 and prior gates are settled. */
    skipGate(pipeline: GatePipeline, gateId: string, reason: string, skippedBy: string): GatePipeline;
    /** Add evidence type to matching gates' provided_evidence. */
    addEvidence(pipeline: GatePipeline, evidenceType: string): GatePipeline;
    /** Add completed role to matching gates' completed_roles. */
    addRole(pipeline: GatePipeline, role: string): GatePipeline;
    /** Check if the pipeline is release-ready (all gates passed or skipped). */
    canRelease(pipeline: GatePipeline): ReleaseCheckResult;
}
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