/**
 * A global install only "sticks" if npm's global bin dir is on PATH — otherwise
 * the install succeeds but the next `agent-cards` still isn't found. Returns
 * the bin dir when it's missing from PATH, or null when everything's fine
 * (including when npm can't be asked — the install itself already worked).
 */
export declare function globalBinMissingFromPath(env?: NodeJS.ProcessEnv): string | null;
/**
 * When running via npx, offer (or with confirm=false: just do) the permanent
 * global install so the user's/agent's next `agent-cards …` resolves. Shared by
 * first-run and `agents add`. No-op for non-npx installs.
 */
export declare function ensureGlobalInstall(options?: {
    confirm: boolean;
}): Promise<void>;
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