/**
 * Environment variable resolution with backward-compatible aliases.
 *
 * New MERIDIAN_* names take precedence over legacy CLAUDE_PROXY_* names.
 * Both are supported indefinitely to avoid breaking existing deployments.
 */
/**
 * Resolve an env var with MERIDIAN_ prefix, falling back to CLAUDE_PROXY_ prefix.
 * Returns undefined if neither is set.
 */
export declare function env(suffix: string): string | undefined;
/**
 * Resolve an env var with a default value.
 */
export declare function envOr(suffix: string, defaultValue: string): string;
/**
 * Resolve a boolean env var (truthy = "1", "true", "yes").
 */
export declare function envBool(suffix: string): boolean;
/**
 * Resolve an integer env var with a default.
 */
export declare function envInt(suffix: string, defaultValue: number): number;
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