/** Shared strict host predicates for GitHub Copilot CAPI endpoints. */
/**
 * Whether the URL targets a GitHub Copilot CAPI gateway.
 *
 * Accepts the public/enterprise githubcopilot.com gateway family and the GHE
 * tenant routing shape Atomic derives from *.ghe.com server URLs:
 * copilot-api.<enterprise>.ghe.com. The suffix checks are label-aware so
 * look-alikes such as githubcopilot.com.evil.test or
 * copilot-api.company.ghe.com.evil.test are rejected.
 */
export declare function isCopilotApiHost(url: URL | string): boolean;
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