/**
 * Config G2 — CI exit policy for `manifest validate`.
 *
 * Language diagnostic severities (ok/warn/block) are unchanged. This policy
 * only decides whether the CLI process exits non-zero after reporting.
 */
export declare const VALIDATION_FAIL_ON_VALUES: readonly ["block", "warn", "never"];
export type ValidationFailOn = (typeof VALIDATION_FAIL_ON_VALUES)[number];
export declare function isValidationFailOn(value: unknown): value is ValidationFailOn;
/**
 * Resolves the effective failOn: CLI flag wins, then config, then `block`.
 */
export declare function resolveValidationFailOn(cliFailOn: string | undefined, configFailOn: unknown): ValidationFailOn;
/** Pure gate: should `manifest validate` exit non-zero? */
export declare class ValidationGatePolicy {
    private readonly failOn;
    constructor(failOn?: ValidationFailOn);
    get policy(): ValidationFailOn;
    shouldExitNonZero(errorCount: number, warningCount: number): boolean;
}
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