import type { InstallMethod, ReleaseChannel } from './types';
export { isNewerVersion, isValidVersion } from './utils/version';
/**
 * Get the global npm prefix path (e.g. /usr/local).
 * Result is cached after the first call.
 */
export declare function getGlobalNpmPrefix(): string;
/**
 * Reset the cached global npm prefix (for testing).
 */
export declare function resetGlobalPrefixCache(): void;
/**
 * Detect how the CLI was installed/started.
 * Priority: dev → npx → global → local
 */
export declare function detectInstallMethod(): InstallMethod;
/**
 * バージョン文字列からリリースチャンネルを推定する。
 * e.g. "0.0.4-beta.21" → "beta", "0.0.4-alpha.3" → "alpha", "0.0.4" → "latest"
 */
export declare function detectChannelFromVersion(version: string): ReleaseChannel;
/**
 * Check if the current user has write permission to the npm global directory.
 * Returns true if writable, false otherwise.
 * On Windows, always returns true (sudo is not available).
 */
export declare function hasGlobalWritePermission(): boolean;
/**
 * Check if sudo is available on the system.
 * Returns false on Windows or when the sudo binary is not found.
 */
export declare function isSudoAvailable(): boolean;
/**
 * Run npm install command and return result.
 */
/**
 * Best-effort secret redaction for npm output. npm's verbose errors can echo
 * Bearer tokens, _authToken=..., basic-auth registry URLs, and X-Auth-Token
 * headers. We forward this string to agent.err.log → Sentry/heartbeat, so the
 * blast radius is wider than the local log file.
 */
export declare function redactSecrets(input: string): string;
/**
 * Install a specific version of the CLI package.
 * Only global and npx methods are supported for automatic update.
 */
export declare function performUpdate(version: string, method?: InstallMethod, cacheScope?: string): Promise<{
    success: boolean;
    error?: string;
}>;
/**
 * Re-exec the current process with the same arguments.
 * Preserves process.execArgv (Node.js runtime flags) and environment variables.
 * For npx installs, resolves the global binary path instead of the stale npx cache path.
 */
export declare function reExecProcess(method?: InstallMethod): void;
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