/**
 * CI gate — classifies diff issues by severity for scan --check.
 */
import type { SutraDiff } from "./diff.js";
import type { Severity, SutraIssue, SutraGraph } from "./types.js";
export interface GateResult {
    exitCode: number;
    newErrors: SutraIssue[];
    newWarns: SutraIssue[];
    newInfos: SutraIssue[];
    resolvedCount: number;
    graphVersion: number;
    diff: SutraDiff;
}
export declare class GraphVersionMismatchError extends Error {
    readonly baselineVersion: number;
    readonly currentVersion: number;
    constructor(baselineVersion: number, currentVersion: number);
}
/** Severity rank for --fail-on threshold (higher = more severe). */
export declare function severityRank(severity: Severity): number;
export declare function assertGraphVersionsMatch(baseline: SutraGraph, current: SutraGraph): void;
/** Partition new issues and compute exit code from diff (issues only). */
export declare function gateFromDiff(diff: SutraDiff, opts: {
    failOn: Severity;
}): GateResult;
/** Human-readable gate summary (candidate language). */
export declare function formatGateSummary(result: GateResult): string;
export interface GateJsonOutput {
    graphVersion: number;
    exitCode: number;
    newErrors: SutraIssue[];
    newWarns: SutraIssue[];
    newInfos: SutraIssue[];
    resolvedCount: number;
    diff: SutraDiff;
}
export declare function gateToJson(result: GateResult): GateJsonOutput;