/**
 * WGL021: Unused Variables
 *
 * Detects global `variables:` that are not referenced by any job script.
 * Unused variables add noise and may indicate stale configuration.
 */
import type { PostSynthCheck, PostSynthDiagnostic } from "@intentius/chant/lint/post-synth";
export declare function checkUnusedVariables(yaml: string): PostSynthDiagnostic[];
export declare const wgl021: PostSynthCheck;
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