$capabilities */ public function __construct( public string $protocolVersion, public array $capabilities, public Implementation $serverInfo, public ?string $instructions = null, ) { // } /** * @param array $payload */ public static function from(array $payload): self { $protocolVersion = Arr::get($payload, 'protocolVersion'); $capabilities = Arr::get($payload, 'capabilities'); /** @var array{name: string, version: string, title?: string, description?: string, icons?: array, theme?: string}>, websiteUrl?: string} $serverInfo */ $serverInfo = Arr::get($payload, 'serverInfo'); $serverName = Arr::get($serverInfo, 'name'); $serverVersion = Arr::get($serverInfo, 'version'); $instructions = Arr::get($payload, 'instructions'); if (! is_string($protocolVersion) || ! in_array($protocolVersion, ProtocolVersion::clientSupported(), true)) { throw new ClientException('The server negotiated an unsupported protocol version.'); } if (! is_array($capabilities) || ! is_array($serverInfo) || ! is_string($serverName) || ! is_string($serverVersion)) { throw new ClientException('Invalid initialize response from server.'); } return new self( protocolVersion: $protocolVersion, capabilities: $capabilities, serverInfo: Implementation::from($serverInfo), instructions: is_string($instructions) ? $instructions : null, ); } }