port messenger to more versions

- Delete raw_capture subcommand (use tcpflow + raw-to-tmcpr instead)
- Fix DefaultEncoder to use temp variable for non-addressable value encoding,
  eliminating manual post-generation patches
- Map nbt and optionalNbt types to nbt.Tag (named NBT) instead of nbt.Anon
  (anonymous NBT) — 1.8 uses named NBT with root tag names

cmd/strom/main.go

@@ -19,7 +19,8 @@ import (
 	"github.com/admin-else/strom/cmd/strom/packet_inspector"
 	"github.com/admin-else/strom/cmd/strom/print_nbt"
 	"github.com/admin-else/strom/cmd/strom/print_replay"
-	"github.com/admin-else/strom/cmd/strom/raw_capture"
+	// "github.com/admin-else/strom/cmd/strom/raw_capture" // removed: use tcpflow instead for raw TCP capture
+	"github.com/admin-else/strom/cmd/strom/raw_to_tmcpr"
 	"github.com/admin-else/strom/cmd/strom/registry_data_hunter"
 	"github.com/admin-else/strom/cmd/strom/serve_tmcpr"
 	"github.com/admin-else/strom/cmd/strom/serve_world"
@@ -61,7 +62,8 @@ var subcommands = map[string]func(args []string) error{
 	"extract-mca":          extract_mca.Run,
 	"data":                 data.Run,
 	"print-replay":         print_replay.Run,
-	"raw-capture":          raw_capture.Run,
+	// "raw-capture":          raw_capture.Run, // removed: use tcpflow instead for raw TCP capture, then raw-to-tmcpr
+	"raw-to-tmcpr":         raw_to_tmcpr.Run,
 	"registry-data-hunter": registry_data_hunter.Run,
 	"serve-world":          serve_world.Run,
 	"mca-to-tmcpr":         mca_to_tmcpr.Run,

cmd/strom/messenger/main.go

@@ -16,6 +16,7 @@ import (
 	"github.com/admin-else/strom/mc/event"
 	"github.com/admin-else/strom/mc/proto"
 	"github.com/admin-else/strom/mc/proto_generated/v1_21_11"
+	"github.com/admin-else/strom/mc/proto_generated/v1_8"
 )
 
 func stror(a, b string) string {
@@ -29,12 +30,14 @@ var (
 	cmd           = flag.NewFlagSet("status", flag.ContinueOnError)
 	connectToFlag = cmd.String("addr", "", "server address to connect to")
 	accFlag       = cmd.String("acc", stror(os.Getenv("STROM_ACC"), "strom_messenger"), "the name to use if longer will be treated as ygg token")
+	versionFlag   = cmd.String("version", "26.2", "minecraft version to use (e.g. 1.8, 1.21.11)")
 )
 
 type Messenger struct {
 	*proto.Conn
-	chat  *chat.Module
+	chat   *chat.Module
-	world *world.Module
+	world  *world.Module
+	legacy bool
 }
 
 func (m *Messenger) OnChat(e *v1_21_11.PlayToClientPacketPlayerChat) (err error) {
@@ -52,15 +55,27 @@ func (m *Messenger) OnChatSystem(e *v1_21_11.PlayToClientPacketSystemChat) (err
 	return
 }
 
+func (m *Messenger) OnChatLegacy(e *v1_8.PlayToClientPacketChat) (err error) {
+	m.Log.Info("chat", "m", e.Message)
+	return
+}
+
 func (m *Messenger) OnStdin(e event.Stdin) (err error) {
 	input := strings.TrimSpace(e.Val)
 	if strings.HasPrefix(input, ">say ") {
-		return m.chat.SendMessage(strings.TrimSpace(strings.TrimPrefix(input, ">say")))
+		return m.sendChat(strings.TrimSpace(strings.TrimPrefix(input, ">say")))
 	}
-	if strings.HasPrefix(input, ">getblock ") {
+	if !m.legacy && strings.HasPrefix(input, ">getblock ") {
 		return m.handleGetBlock(strings.TrimSpace(strings.TrimPrefix(input, ">getblock")))
 	}
-	return m.chat.SendMessage(input)
+	return m.sendChat(input)
+}
+
+func (m *Messenger) sendChat(message string) (err error) {
+	if m.legacy {
+		return m.Send(&v1_8.PlayToServerPacketChat{Message: message})
+	}
+	return m.chat.SendMessage(message)
 }
 
 func (m *Messenger) handleGetBlock(args string) (err error) {
@@ -105,30 +120,45 @@ func Run(args []string) (err error) {
 	if err != nil {
 		return
 	}
-	c, err := client.Login(*connectToFlag, acc)
+	c, err := client.Login(*connectToFlag, acc, client.WithVersion(*versionFlag))
 	if err != nil {
 		return
 	}
 	defer c.Close()
 
-	chatMod, err := chat.Start(c, acc)
+	isLegacy := c.ProtocolVersion < 764
-	if err != nil {
+
-		return
+	var chatMod *chat.Module
+	if !isLegacy {
+		chatMod, err = chat.Start(c, acc)
+		if err != nil {
+			return
+		}
 	}
 
-	// Shareable world storage. Other bots can subscribe to the same World.
-	w := world.NewWorld(c.Version, -64, 384)
-
 	m := &Messenger{
-		Conn:  c,
+		Conn:   c,
-		chat:  chatMod,
+		chat:   chatMod,
-		world: world.Start(c, w),
+		legacy: isLegacy,
+	}
+
+	if !isLegacy {
+		w := world.NewWorld(c.Version, -64, 384)
+		m.world = world.Start(c, w)
 	}
 
 	event.StartListingStdin(m.Loop)
 	m.Register(m.OnStdin)
-	m.RegisterUntilLatest(m.OnChat, m.OnChatUnsigned, m.OnChatSystem)
+
-	keepalive.Start(m.Conn)
+	if isLegacy {
+		m.Register(m.OnChatLegacy)
+	} else {
+		m.RegisterUntilLatest(m.OnChat, m.OnChatUnsigned, m.OnChatSystem)
+	}
+
+	if !isLegacy {
+		keepalive.Start(m.Conn)
+	}
 
 	return m.StartConn()
 }

cmd/strom/print_replay/main.go

@@ -25,7 +25,7 @@ var (
 	FileFlag        = cmd.String("file", "", "The tmcpr file to print")
 	ProtocolVersion = cmd.Int("protocol", -1, "The protocol version")
 	CreateTestsPath = cmd.String("create-tests", "", "")
-	StateFlag       = cmd.String("state", "login", "Initial state: login, config, play")
+	StateFlag       = cmd.String("state", "login", "Initial state: handshake, login, config, status, play")
 	DirectionFlag   = cmd.String("direction", "clientbound", "Packet direction: clientbound (ToClient) or serverbound (ToServer)")
 )
 
@@ -106,22 +106,6 @@ func UnpackPacket(r io.Reader) (packet proto_base.EncodeDecodeAble, i proto_base
 		packet = &proto.UnCodablePacket{Err: proto.BadPacketIdErr, Data: packetData, Info: i}
 		return
 	}
-	switch direction {
-	case proto_base.ToClient:
-		switch i.Name {
-		case "success":
-			state = proto_base.Configuration
-		case "finish_configuration":
-			state = proto_base.Play
-		}
-	case proto_base.ToServer:
-		switch i.Name {
-		case "login_acknowledged":
-			state = proto_base.Configuration
-		case "finish_configuration":
-			state = proto_base.Play
-		}
-	}
 	packet = reflect.New(reflect.TypeOf(i.Type).Elem()).Interface().(proto_base.EncodeDecodeAble)
 	err = packet.Decode(b)
 	if err != nil {
@@ -132,9 +116,40 @@ func UnpackPacket(r io.Reader) (packet proto_base.EncodeDecodeAble, i proto_base
 		packet = &proto.UnCodablePacket{Err: proto.PacketNotFullyDecodedErr, Data: packetData[indexafterid:], Info: i}
 		return
 	}
+	trackState(packet, i)
 	return
 }
 
+func trackState(packet proto_base.EncodeDecodeAble, i proto_base.PacketInfo) {
+	switch i.Name {
+	case "set_protocol":
+		v := reflect.ValueOf(packet).Elem()
+		nsField := v.FieldByName("NextState")
+		if nsField.IsValid() && nsField.Kind() == reflect.Int32 {
+			switch nsField.Int() {
+			case 1:
+				state = proto_base.Status
+			case 2:
+				state = proto_base.Login
+			}
+		}
+	case "login_start":
+		if int32(*ProtocolVersion) <= 47 {
+			state = proto_base.Play
+		}
+	case "success":
+		if int32(*ProtocolVersion) >= 764 {
+			state = proto_base.Configuration
+		} else {
+			state = proto_base.Play
+		}
+	case "finish_configuration":
+		state = proto_base.Play
+	case "login_acknowledged":
+		state = proto_base.Configuration
+	}
+}
+
 func Run(args []string) (err error) {
 	err = cmd.Parse(args)
 	if err != nil {
@@ -147,12 +162,16 @@ func Run(args []string) (err error) {
 		return fmt.Errorf("no file specified")
 	}
 	switch *StateFlag {
+	case "handshake":
+		state = proto_base.Handshaking
 	case "login":
 		state = proto_base.Login
 	case "config":
 		state = proto_base.Configuration
 	case "play":
 		state = proto_base.Play
+	case "status":
+		state = proto_base.Status
 	default:
 		return fmt.Errorf("unknown state: %s", *StateFlag)
 	}

cmd/strom/raw_capture/main.go

@@ -1,253 +0,0 @@
-package raw_capture
-
-import (
-	"flag"
-	"fmt"
-	"log/slog"
-	"os"
-	"time"
-
-	"github.com/admin-else/strom/mc/api"
-	"github.com/admin-else/strom/mc/client"
-	"github.com/admin-else/strom/mc/data"
-	"github.com/admin-else/strom/mc/event"
-	"github.com/admin-else/strom/mc/proto"
-	"github.com/admin-else/strom/mc/proto/replay"
-	"github.com/admin-else/strom/mc/proto_base"
-	"github.com/admin-else/strom/mc/proto_generated/v1_21_11"
-	"github.com/admin-else/strom/mc/server"
-	"github.com/admin-else/strom/mc/text"
-)
-
-var Cmd = flag.NewFlagSet("raw-capture", flag.ContinueOnError)
-
-var OfflineNameFlag = Cmd.String("name", "raw_capture", "offline player name")
-var Token = Cmd.String("token", "", "token to use")
-
-var TargetAddr = Cmd.String("addr", "127.0.0.1:25565", "address to connect to")
-var ListenAddr = Cmd.String("listen", "127.0.0.1:25566", "address to listen on")
-var ClientboundFile = Cmd.String("clientbound-file", "clientbound.tmcpr", "file to write clientbound packets to")
-var ServerboundFile = Cmd.String("serverbound-file", "serverbound.tmcpr", "file to write serverbound packets to")
-var Version = Cmd.String("version", "", "client protocol version (e.g. 26.1); if empty, detect from server status")
-
-var StatusResponse = server.StatusResponse{
-	Version: server.StatusResponseVersion{
-		Name:     text.Pretty("STROM raw-capture"),
-		Protocol: 0,
-	},
-	Players:            server.StatusResponsePlayers{},
-	Description:        text.Pretty("STROM raw-capture proxy"),
-	Favicon:            "",
-	EnforcesSecureChat: false,
-}
-
-type Proxy struct {
-	Client, Servee *proto.Conn
-
-	clientboundFile *os.File
-	serverboundFile *os.File
-
-	clientboundWriter *replay.Writer
-	serverboundWriter *replay.Writer
-
-	startTime time.Time
-}
-
-func (p *Proxy) Start() (err error) {
-	p.startTime = time.Now()
-
-	p.Client.RegisterCritical(p.OnAnything)
-	p.Servee.RegisterCritical(p.OnAnything)
-
-	p.Client.RegisterCriticalUntilLatest(p.OnCompress)
-	p.Servee.RegisterCriticalUntilLatest(p.OnHandshake)
-	p.Servee.RegisterCriticalUntilLatest(p.OnLoginAcknowledged)
-	p.Servee.RegisterCriticalUntilLatest(p.OnFinishConfiguration)
-
-	errChan := make(chan error)
-	go func() {
-		errChan <- p.Client.StartConn()
-	}()
-	go func() {
-		errChan <- p.Servee.StartConn()
-	}()
-	err = <-errChan
-	return
-}
-
-func (p *Proxy) timestamp() uint32 {
-	return uint32(time.Since(p.startTime).Milliseconds())
-}
-
-func (p *Proxy) OnAnything(e event.Anything) (err error) {
-	packet, ok := e.Val.(proto_base.EncodeDecodeAble)
-	if !ok {
-		return
-	}
-
-	packetInfo, ok := proto.LookupPacketInfoByType(packet)
-	if !ok {
-		return
-	}
-
-	if packetInfo.Name == "encryption_begin" {
-		return fmt.Errorf("encryption requested by remote server; raw capture cannot continue")
-	}
-
-	switch packetInfo.Direction {
-	case proto_base.ToServer:
-		err = p.serverboundWriter.WritePacket(packet, p.timestamp())
-		if err != nil {
-			return
-		}
-		err = p.Client.Send(packet)
-	case proto_base.ToClient:
-		err = p.clientboundWriter.WritePacket(packet, p.timestamp())
-		if err != nil {
-			return
-		}
-		err = p.Servee.Send(packet)
-	}
-	return
-}
-
-func (p *Proxy) OnCompress(packet *v1_21_11.LoginToClientPacketCompress) (err error) {
-	err = p.clientboundWriter.WritePacket(packet, p.timestamp())
-	if err != nil {
-		return
-	}
-	err = p.Servee.Send(packet)
-	if err != nil {
-		return
-	}
-	p.Servee.SetCompressionThreshold(packet.Threshold)
-	p.Client.SetCompressionThreshold(packet.Threshold)
-	return event.DontForwardErr
-}
-
-func (p *Proxy) OnHandshake(packet *v1_21_11.HandshakingToServerPacketSetProtocol) (err error) {
-	state := proto_base.State(packet.NextState)
-	p.Servee.SetState(state)
-	return event.DontForwardErr
-}
-
-func (p *Proxy) OnLoginAcknowledged(packet *v1_21_11.LoginToServerPacketLoginAcknowledged) (err error) {
-	err = p.serverboundWriter.WritePacket(packet, p.timestamp())
-	if err != nil {
-		return
-	}
-	err = p.Client.Send(packet)
-	if err != nil {
-		return
-	}
-	p.Servee.SetState(proto_base.Configuration)
-	p.Client.SetState(proto_base.Configuration)
-	return event.DontForwardErr
-}
-
-func (p *Proxy) OnFinishConfiguration(packet *v1_21_11.ConfigurationToServerPacketFinishConfiguration) (err error) {
-	err = p.serverboundWriter.WritePacket(packet, p.timestamp())
-	if err != nil {
-		return
-	}
-	err = p.Client.Send(packet)
-	if err != nil {
-		return
-	}
-	p.Servee.SetState(proto_base.Play)
-	p.Client.SetState(proto_base.Play)
-	return event.DontForwardErr
-}
-
-func Run(args []string) (err error) {
-	err = Cmd.Parse(args)
-	if err != nil {
-		return
-	}
-
-	clientboundFile, err := os.Create(*ClientboundFile)
-	if err != nil {
-		return fmt.Errorf("create clientbound file: %w", err)
-	}
-	defer clientboundFile.Close()
-
-	serverboundFile, err := os.Create(*ServerboundFile)
-	if err != nil {
-		return fmt.Errorf("create serverbound file: %w", err)
-	}
-	defer serverboundFile.Close()
-
-	resolvedAddr, _, _, err := client.DoDNSChecked(nil, *TargetAddr, nil)
-	if err != nil {
-		return
-	}
-
-	var targetVersion string
-	var targetProtocol int32
-	if *Version == "" {
-		status, err := client.Status(nil, resolvedAddr)
-		if err != nil {
-			return fmt.Errorf("failed to detect server version: %w", err)
-		}
-		targetProtocol = status.Version.Protocol
-		versionInfo, err := data.LookUpVersionByProtocolVersion(targetProtocol)
-		if err != nil {
-			return fmt.Errorf("unknown protocol version %d: %w", targetProtocol, err)
-		}
-		targetVersion = versionInfo.MinecraftVersion
-	} else {
-		versionInfo, err := data.LookUpVersionByName(*Version)
-		if err != nil {
-			return fmt.Errorf("unknown version %s: %w", *Version, err)
-		}
-		targetVersion = versionInfo.MinecraftVersion
-		targetProtocol = versionInfo.Version
-	}
-
-	StatusResponse.Version.Name = text.Pretty("STROM raw-capture " + targetVersion)
-	StatusResponse.Version.Protocol = targetProtocol
-	StatusResponse.Description = text.Pretty(fmt.Sprintf("Raw capture proxy forwards to %s (%s)", resolvedAddr, targetVersion))
-
-	slog.Info("Starting raw capture", "listen", *ListenAddr, "target", resolvedAddr, "version", targetVersion, "protocol", targetProtocol, "clientbound", *ClientboundFile, "serverbound", *ServerboundFile)
-
-	err = server.StartServerWithOnConn(*ListenAddr, func(serveeConn *proto.Conn) (err error) {
-		proxy := &Proxy{
-			Servee:            serveeConn,
-			clientboundFile:   clientboundFile,
-			serverboundFile:   serverboundFile,
-			clientboundWriter: replay.NewWriter(clientboundFile),
-			serverboundWriter: replay.NewWriter(serverboundFile),
-		}
-
-		acc := api.NewOfflineAccount(*OfflineNameFlag)
-		if *Token != "" {
-			acc, err = api.NewAccountFromYGG(*Token)
-			if err != nil {
-				return
-			}
-		}
-
-		_, err = server.ServeLogin(serveeConn, server.WithOtherAccount(acc), server.WithStatus(StatusResponse), server.WithoutOnlineMode(), server.WithoutEncryption())
-		if err != nil {
-			return
-		}
-
-		c, err := client.Connect(nil, resolvedAddr, targetVersion)
-		if err != nil {
-			return
-		}
-		defer c.Close()
-
-		err = client.LoginRaw(c, acc)
-		if err != nil {
-			return
-		}
-
-		proxy.Client = c
-		proxy.Client.AlwaysDecode = true
-		proxy.Servee.AlwaysDecode = true
-
-		return proxy.Start()
-	})
-	return
-}

cmd/strom/raw_to_tmcpr/main.go

@@ -0,0 +1,243 @@
+package raw_to_tmcpr
+
+import (
+	"bytes"
+	"compress/zlib"
+	"errors"
+	"flag"
+	"fmt"
+	"io"
+	"os"
+	"time"
+
+	"github.com/admin-else/strom/mc/proto/replay"
+	"github.com/admin-else/strom/mc/proto_base"
+)
+
+var Cmd = flag.NewFlagSet("raw-to-tmcpr", flag.ContinueOnError)
+
+var ClientboundIn = Cmd.String("clientbound", "", "raw tcpflow file for clientbound (server->client) direction")
+var ServerboundIn = Cmd.String("serverbound", "", "raw tcpflow file for serverbound (client->server) direction")
+var ClientboundOut = Cmd.String("clientbound-out", "clientbound.tmcpr", "output TMCPR file for clientbound")
+var ServerboundOut = Cmd.String("serverbound-out", "serverbound.tmcpr", "output TMCPR file for serverbound")
+var ClientboundState = Cmd.String("clientbound-state", "login", "initial state for clientbound: handshake, login, status, play")
+var ServerboundState = Cmd.String("serverbound-state", "handshake", "initial state for serverbound: handshake, login, status, play")
+
+type captureReader struct {
+	r              io.Reader
+	out            *replay.Writer
+	state          proto_base.State
+	threshold      int32
+	startTime      time.Time
+	haveStartTime  bool
+	direction      proto_base.Direction
+	pendingThreshold int32
+}
+
+func (cr *captureReader) setStartTime() {
+	if !cr.haveStartTime {
+		cr.startTime = time.Now()
+		cr.haveStartTime = true
+	}
+}
+
+func (cr *captureReader) timestamp() uint32 {
+	return uint32(time.Since(cr.startTime).Milliseconds())
+}
+
+func readPacketBytes(r io.Reader, threshold int32) ([]byte, error) {
+	packetLen, err := proto_base.DecodeVarInt(r)
+	if err != nil {
+		return nil, fmt.Errorf("read packet length: %w", err)
+	}
+
+	rawBytes := make([]byte, packetLen)
+	_, err = io.ReadFull(r, rawBytes)
+	if err != nil {
+		return nil, fmt.Errorf("read packet data: %w", err)
+	}
+
+	if threshold >= 0 {
+		buf := bytes.NewReader(rawBytes)
+		uncompressedLen, err := proto_base.DecodeVarInt(buf)
+		if err != nil {
+			return nil, fmt.Errorf("read uncompressed length: %w", err)
+		}
+		if uncompressedLen == 0 {
+			return io.ReadAll(buf)
+		} else {
+			zReader, err := zlib.NewReader(buf)
+			if err != nil {
+				return nil, fmt.Errorf("zlib reader: %w", err)
+			}
+			defer zReader.Close()
+			decompressed, err := io.ReadAll(zReader)
+			if err != nil {
+				return nil, fmt.Errorf("decompress: %w", err)
+			}
+			return decompressed, nil
+		}
+	}
+
+	return rawBytes, nil
+}
+
+func (cr *captureReader) trackState(packetBytes []byte) {
+	buf := bytes.NewReader(packetBytes)
+	packetId, err := proto_base.DecodeVarInt(buf)
+	if err != nil {
+		return
+	}
+
+	switch cr.state {
+	case proto_base.Handshaking:
+		if cr.direction == proto_base.ToServer && packetId == 0 {
+			_, err = proto_base.DecodeVarInt(buf) // protocol version
+			if err != nil {
+				return
+			}
+			_, err = proto_base.DecodeString(buf) // server address
+			if err != nil {
+				return
+			}
+			portBytes := make([]byte, 2)
+			_, err = io.ReadFull(buf, portBytes)
+			if err != nil {
+				return
+			}
+			nextState, err := proto_base.DecodeVarInt(buf)
+			if err != nil {
+				return
+			}
+			if nextState == 2 {
+				cr.state = proto_base.Login
+			} else if nextState == 1 {
+				cr.state = proto_base.Status
+			}
+		}
+	case proto_base.Login:
+		if cr.direction == proto_base.ToClient {
+			if packetId == 0x03 {
+				threshold, err := proto_base.DecodeVarInt(buf)
+				if err == nil {
+					cr.threshold = threshold
+				}
+			} else if packetId == 0x02 {
+				cr.state = proto_base.Play
+			}
+		} else if cr.direction == proto_base.ToServer && packetId == 0 {
+			if cr.pendingThreshold >= 0 {
+				cr.threshold = cr.pendingThreshold
+			}
+		}
+	case proto_base.Status:
+	case proto_base.Play:
+	}
+}
+
+func (cr *captureReader) process() (count int, err error) {
+	for {
+		packetBytes, err := readPacketBytes(cr.r, cr.threshold)
+		if err != nil {
+			if errors.Is(err, io.EOF) || errors.Is(err, io.ErrUnexpectedEOF) {
+				return count, nil
+			}
+			return count, err
+		}
+
+		cr.setStartTime()
+		cr.trackState(packetBytes)
+
+		err = cr.out.WriteRaw(packetBytes, cr.timestamp())
+		if err != nil {
+			return count, fmt.Errorf("write TMCPR: %w", err)
+		}
+		count++
+	}
+}
+
+func Run(args []string) (err error) {
+	err = Cmd.Parse(args)
+	if err != nil {
+		return
+	}
+
+	if *ClientboundIn == "" && *ServerboundIn == "" {
+		return fmt.Errorf("at least one of -clientbound or -serverbound must be specified")
+	}
+
+	parseState := func(name string) (proto_base.State, error) {
+		switch name {
+		case "handshake":
+			return proto_base.Handshaking, nil
+		case "login":
+			return proto_base.Login, nil
+		case "play":
+			return proto_base.Play, nil
+		case "status":
+			return proto_base.Status, nil
+		default:
+			return 0, fmt.Errorf("unknown state: %s (valid: handshake, login, status, play)", name)
+		}
+	}
+
+	var compressionThreshold int32 = -1
+
+	if *ClientboundIn != "" {
+		state, err := parseState(*ClientboundState)
+		if err != nil {
+			return err
+		}
+		compressionThreshold, err = processFile(*ClientboundIn, *ClientboundOut, state, proto_base.ToClient, -1)
+		if err != nil {
+			return fmt.Errorf("clientbound: %w", err)
+		}
+	}
+
+	if *ServerboundIn != "" {
+		state, err := parseState(*ServerboundState)
+		if err != nil {
+			return err
+		}
+		_, err = processFile(*ServerboundIn, *ServerboundOut, state, proto_base.ToServer, compressionThreshold)
+		if err != nil {
+			return fmt.Errorf("serverbound: %w", err)
+		}
+	}
+
+	return
+}
+
+func processFile(inPath, outPath string, initial proto_base.State, dir proto_base.Direction, initialThreshold int32) (finalThreshold int32, err error) {
+	in, err := os.Open(inPath)
+	if err != nil {
+		return initialThreshold, fmt.Errorf("open input: %w", err)
+	}
+	defer in.Close()
+
+	out, err := os.Create(outPath)
+	if err != nil {
+		return initialThreshold, fmt.Errorf("create output: %w", err)
+	}
+	defer out.Close()
+
+	cr := &captureReader{
+		r:         in,
+		out:       replay.NewWriter(out),
+		state:     initial,
+		threshold: -1,
+		direction: dir,
+		pendingThreshold: initialThreshold,
+	}
+	if dir == proto_base.ToClient {
+		cr.threshold = initialThreshold
+	}
+
+	count, err := cr.process()
+	if err != nil {
+		return cr.threshold, err
+	}
+
+	fmt.Printf("%s: %d packets written to %s (threshold=%d)\n", inPath, count, outPath, cr.threshold)
+	return cr.threshold, nil
+}

mc/client/client.go

@@ -2,6 +2,7 @@ package client
 
 import (
 	"context"
+	"errors"
 	"net"
 
 	"github.com/admin-else/strom/mc/data"
@@ -21,6 +22,10 @@ func Connect(ctx context.Context, addr string, version string) (ret *proto.Conn,
 		if err != nil {
 			return
 		}
+		if s.Version.Protocol == 0 {
+			err = errors.New("server didnt return protocol version")
+			return
+		}
 		protocolVersion = s.Version.Protocol
 	} else {
 		var v data.VersionInfo
@@ -55,3 +60,23 @@ func ConnectVersionLess(ctx context.Context, addr string) (ret *proto.Conn, err
 	ret.W = ret.Conn
 	return
 }
+
+// ConnectWithConn wraps an existing net.Conn into a proto.Conn with the given
+// Minecraft version. The version must be non-empty.
+func ConnectWithConn(ctx context.Context, conn net.Conn, version string) (ret *proto.Conn, err error) {
+	if ctx == nil {
+		ctx = context.Background()
+	}
+	ret = proto.NewConnCtx(ctx)
+	ret.Actor = proto_base.Client
+	ret.Conn = conn
+	ret.R = conn
+	ret.W = conn
+	v, err := data.LookUpVersionByName(version)
+	if err != nil {
+		return
+	}
+	ret.ProtocolVersion = v.Version
+	ret.Version = version
+	return
+}

mc/client/login.go

@@ -7,6 +7,7 @@ import (
 	"crypto/x509"
 	"encoding/json"
 	"errors"
+	"net"
 
 	"github.com/admin-else/strom/mc/api"
 	"github.com/admin-else/strom/mc/crypto"
@@ -14,8 +15,10 @@ import (
 	"github.com/admin-else/strom/mc/proto"
 	"github.com/admin-else/strom/mc/proto_base"
 	"github.com/admin-else/strom/mc/proto_generated/v1_21_8"
+	"github.com/admin-else/strom/mc/proto_generated/v1_8"
 	"github.com/admin-else/strom/mc/proto_generated/v26_2"
 	"github.com/admin-else/strom/mc/text"
+	"github.com/google/uuid"
 )
 
 type LoginClient struct {
@@ -111,13 +114,42 @@ func (s *LoginClient) OnDisconnect(packet *v1_21_8.LoginToClientPacketDisconnect
 	return
 }
 
-func (s *LoginClient) OnSuccess(success *v1_21_8.LoginToClientPacketSuccess) (err error) {
+func (s *LoginClient) OnDisconnectV1_8(packet *v1_8.LoginToClientPacketDisconnect) (err error) {
-	s.GivenAccount = success
+	var reason text.Component
-	err = s.Send(&v1_21_8.LoginToServerPacketLoginAcknowledged{})
+	err = json.Unmarshal([]byte(packet.Reason), &reason)
 	if err != nil {
 		return
 	}
-	s.SetState(proto_base.Configuration)
+	err = KickedDuringLoginErr{reason}
+	return
+}
+
+func (s *LoginClient) OnCompressV1_8(packet *v1_8.LoginToClientPacketCompress) (err error) {
+	s.SetCompressionThreshold(packet.Threshold)
+	return
+}
+
+func (s *LoginClient) OnSuccessV1_8(success *v1_8.LoginToClientPacketSuccess) (err error) {
+	s.GivenAccount = &v1_21_8.LoginToClientPacketSuccess{
+		Uuid:     uuid.MustParse(success.Uuid),
+		Username: success.Username,
+	}
+	s.SetState(proto_base.Play)
+	err = event.HandlerDoneErr{}
+	return
+}
+
+func (s *LoginClient) OnSuccess(success *v1_21_8.LoginToClientPacketSuccess) (err error) {
+	s.GivenAccount = success
+	if s.ProtocolVersion >= 764 {
+		err = s.Send(&v1_21_8.LoginToServerPacketLoginAcknowledged{})
+		if err != nil {
+			return
+		}
+		s.SetState(proto_base.Configuration)
+	} else {
+		s.SetState(proto_base.Play)
+	}
 	err = event.HandlerDoneErr{}
 	return
 }
@@ -135,7 +167,14 @@ func (s *LoginClient) OnStart() (err error) {
 }
 
 // LoginRaw performs the login handshake on an already-established connection without DNS resolution or configuration handling.
+// The handshake address is derived from the connection's RemoteAddr.
 func LoginRaw(c *proto.Conn, account *api.Account) (err error) {
+	return LoginRawAddr(c, account, "")
+}
+
+// LoginRawAddr performs the login handshake on an already-established connection using the given address for the handshake packet.
+// If hostAddr is empty, the handshake address is derived from the connection's RemoteAddr.
+func LoginRawAddr(c *proto.Conn, account *api.Account, hostAddr string) (err error) {
 	lc := &LoginClient{
 		Conn:    c,
 		Account: account,
@@ -147,8 +186,16 @@ func LoginRaw(c *proto.Conn, account *api.Account) (err error) {
 	lc.RegisterCriticalUntilLatest(lc.OnDisconnect)
 	lc.RegisterCriticalUntil("26.1", lc.OnSuccess)
 	lc.RegisterCriticalUntilLatest(lc.OnSuccess26_2)
+	lc.RegisterCritical(lc.OnCompressV1_8)
+	lc.RegisterCritical(lc.OnDisconnectV1_8)
+	lc.RegisterCritical(lc.OnSuccessV1_8)
 
-	p, err := MakeHandshakePacket(lc.Conn, proto_base.Login)
+	var p proto_base.EncodeDecodeAble
+	if hostAddr != "" {
+		p, err = MakeHandshakePacketAddr(lc.Conn, proto_base.Login, hostAddr)
+	} else {
+		p, err = MakeHandshakePacket(lc.Conn, proto_base.Login)
+	}
 	if err != nil {
 		return
 	}
@@ -158,7 +205,11 @@ func LoginRaw(c *proto.Conn, account *api.Account) (err error) {
 		return
 	}
 	lc.SetState(proto_base.Login)
-	err = lc.Send(&v1_21_8.LoginToServerPacketLoginStart{Username: lc.Account.Name, PlayerUUID: lc.Account.Uuid})
+	if lc.Conn.ProtocolVersion < 759 {
+		err = lc.Send(&v1_8.LoginToServerPacketLoginStart{Username: lc.Account.Name})
+	} else {
+		err = lc.Send(&v1_21_8.LoginToServerPacketLoginStart{Username: lc.Account.Name, PlayerUUID: lc.Account.Uuid})
+	}
 
 	err = lc.StartConn()
 	if err != nil {
@@ -188,11 +239,43 @@ func WithVersion(version string) func(ls *loginSettings) {
 	}
 }
 
+func WithIgnoreConfig() func(ls *loginSettings) {
+	return func(ls *loginSettings) {
+		ls.IgnoreConfig = true
+	}
+}
+
+// DialFunc is a context-aware dial function used by Login to establish a TCP connection.
+type DialFunc func(ctx context.Context, network, addr string) (net.Conn, error)
+
+// WithConn returns a login setting that uses an already-established net.Conn instead of dialling.
+// WithVersion must also be set; auto-detection is not possible with a pre-established connection.
+func WithConn(conn net.Conn) func(ls *loginSettings) {
+	return func(ls *loginSettings) {
+		ls.Conn = conn
+	}
+}
+
+// WithDialer returns a login setting that uses the given dial function instead of net.Dialer.
+// Auto version detection via status ping is still supported when no explicit version is set.
+func WithDialer(d DialFunc) func(ls *loginSettings) {
+	return func(ls *loginSettings) {
+		ls.Dialer = d
+	}
+}
+
+var (
+	ErrWithConnRequiresVersion = errors.New("WithVersion is required when using WithConn")
+	ErrWithConnNoStatus        = errors.New("auto version detection is not supported with WithConn")
+)
+
 type loginSettings struct {
 	NoDns        bool
 	Ctx          context.Context
 	Version      string
 	IgnoreConfig bool
+	Conn         net.Conn
+	Dialer       DialFunc
 }
 
 // Login resolves the address with SRV DNS, connects, performs the login handshake, and handles the configuration phase, returning an authenticated connection ready for play.
@@ -203,22 +286,52 @@ func Login(connectTo string, account *api.Account, settings ...func(ls *loginSet
 		setting(ls)
 	}
 
-	if !ls.NoDns {
+	if ls.Conn != nil {
-		connectTo, _, _, err = DoDNSChecked(ls.Ctx, connectTo, nil)
+		if ls.Version == "" {
+			return nil, ErrWithConnRequiresVersion
+		}
+		c, err = ConnectWithConn(ls.Ctx, ls.Conn, ls.Version)
+		if err != nil {
+			return
+		}
+	} else if ls.Dialer != nil {
+		if ls.Version == "" {
+			return nil, ErrWithConnRequiresVersion
+		}
+		if !ls.NoDns {
+			connectTo, _, _, err = DoDNSChecked(ls.Ctx, connectTo, nil)
+			if err != nil {
+				return
+			}
+		}
+		var conn net.Conn
+		conn, err = ls.Dialer(ls.Ctx, "tcp", connectTo)
+		if err != nil {
+			return
+		}
+		c, err = ConnectWithConn(ls.Ctx, conn, ls.Version)
+		if err != nil {
+			conn.Close()
+			return
+		}
+	} else {
+		if !ls.NoDns {
+			connectTo, _, _, err = DoDNSChecked(ls.Ctx, connectTo, nil)
+			if err != nil {
+				return
+			}
+		}
+		c, err = Connect(ls.Ctx, connectTo, ls.Version)
 		if err != nil {
 			return
 		}
 	}
 
-	c, err = Connect(ls.Ctx, connectTo, ls.Version)
+	err = LoginRawAddr(c, account, connectTo)
 	if err != nil {
 		return
 	}
-	err = LoginRaw(c, account)
+	if !ls.IgnoreConfig && c.ProtocolVersion >= 764 {
-	if err != nil {
-		return
-	}
-	if !ls.IgnoreConfig {
 		err = IgnoreConfig(c)
 	}
 	return

mc/client/status.go

@@ -9,6 +9,7 @@ import (
 	"github.com/admin-else/strom/mc/proto"
 	"github.com/admin-else/strom/mc/proto_base"
 	"github.com/admin-else/strom/mc/proto_generated/v1_21_8"
+	"github.com/admin-else/strom/mc/proto_generated/v1_8"
 	"github.com/admin-else/strom/mc/server"
 )
 
@@ -36,16 +37,38 @@ func (s *StatusClient) OnPong(p *v1_21_8.StatusToClientPacketPing) (err error) {
 	return
 }
 
+func (s *StatusClient) OnStatusV1_8(p *v1_8.StatusToClientPacketServerInfo) (err error) {
+	s.Status = p.Response
+	s.PingSendTime = time.Now()
+	if s.DoPingRoundTripTime {
+		err = s.Send(&v1_21_8.StatusToServerPacketPing{Time: s.PingSendTime.UnixMilli()})
+	} else {
+		err = event.HandlerDoneErr{}
+	}
+	return
+}
+
+func (s *StatusClient) OnPongV1_8(p *v1_8.StatusToClientPacketPing) (err error) {
+	s.PingReceiveTime = time.Now()
+	err = event.HandlerDoneErr{}
+	return
+}
+
 // StatusRaw returns a StatusClient that is not connected to a server.
 // So ignore the resource leak warning. And maybe attach a warn ignore comment.
 // It does not resolve SRV records.
 func StatusRaw(ctx context.Context, addr string) (s *StatusClient, err error) {
+	return StatusRawWithVersion(ctx, addr, "1.21.8")
+}
+
+// StatusRawWithVersion is like StatusRaw but uses the given Minecraft version for the handshake.
+func StatusRawWithVersion(ctx context.Context, addr, version string) (s *StatusClient, err error) {
 	c, err := ConnectVersionLess(ctx, addr)
 	if err != nil {
 		return
 	}
 	defer c.Close()
-	err = c.SetVersion("1.21.8")
+	err = c.SetVersion(version)
 	if err != nil {
 		return
 	}
@@ -54,6 +77,8 @@ func StatusRaw(ctx context.Context, addr string) (s *StatusClient, err error) {
 	}
 	s.RegisterCriticalUntilLatest(s.OnStatus)
 	s.RegisterCriticalUntilLatest(s.OnPong)
+	s.RegisterCritical(s.OnStatusV1_8)
+	s.RegisterCritical(s.OnPongV1_8)
 
 	p, err := MakeHandshakePacketAddr(s.Conn, proto_base.Status, addr)
 	if err != nil {
@@ -71,11 +96,12 @@ func StatusRaw(ctx context.Context, addr string) (s *StatusClient, err error) {
 }
 
 // StatusNoDns is like Status but does not resolve SRV records.
-func StatusNoDns(addr string) (status server.StatusResponse, err error) {
+func StatusNoDns(ctx context.Context, addr string) (status server.StatusResponse, err error) {
-	s, err := StatusRaw(context.Background(), addr)
+	s, err := StatusRaw(ctx, addr)
 	if err != nil {
 		return
 	}
+	defer s.Close()
 	err = json.Unmarshal([]byte(s.Status), &status)
 	return
 }
@@ -86,5 +112,5 @@ func Status(ctx context.Context, addr string) (status server.StatusResponse, err
 	if err != nil {
 		return
 	}
-	return StatusNoDns(addr)
+	return StatusNoDns(ctx, addr)
 }

mc/data/minecraft-data/pc/1.8/attributes.json

@@ -0,0 +1,86 @@
+[
+  {
+    "name": "maxHealth",
+    "resource": "generic.maxHealth",
+    "default": 20,
+    "min": 1,
+    "max": 1024
+  },
+  {
+    "name": "followRange",
+    "resource": "generic.followRange",
+    "default": 32,
+    "min": 0,
+    "max": 2048
+  },
+  {
+    "name": "knockbackResistance",
+    "resource": "generic.knockbackResistance",
+    "default": 0,
+    "min": 0,
+    "max": 1
+  },
+  {
+    "name": "movementSpeed",
+    "resource": "generic.movementSpeed",
+    "default": 0.7,
+    "min": 0,
+    "max": 1024
+  },
+  {
+    "name": "attackDamage",
+    "resource": "generic.attackDamage",
+    "default": 2,
+    "min": 0,
+    "max": 2048
+  },
+  {
+    "name": "horseJumpStrength",
+    "resource": "horse.jumpStrength",
+    "default": 0.7,
+    "min": 0,
+    "max": 2
+  },
+  {
+    "name": "zombieSpawnReinforcements",
+    "resource": "zombie.spawnReinforcements",
+    "default": 0,
+    "min": 0,
+    "max": 1
+  },
+  {
+    "name": "attackSpeed",
+    "resource": "generic.attackSpeed",
+    "default": 4,
+    "min": 0,
+    "max": 1024
+  },
+  {
+    "name": "flyingSpeed",
+    "resource": "generic.flyingSpeed",
+    "default": 0.4,
+    "min": 0,
+    "max": 1024
+  },
+  {
+    "name": "attackKnockback",
+    "resource": "generic.attackKnockback",
+    "default": 0,
+    "min": 0,
+    "max": 5
+  },
+  {
+    "name": "armorHealth",
+    "resource": "generic.armor",
+    "default": 0,
+    "min": 0,
+    "max": 30
+  },
+  {
+    "name": "armorToughness",
+    "resource": "generic.armorToughness",
+    "default": 0,
+    "min": 0,
+    "max": 20
+  }
+]

mc/data/minecraft-data/pc/1.8/biomes.json

@@ -0,0 +1,817 @@
+[
+  {
+    "id": 0,
+    "name": "ocean",
+    "name_legacy": "ocean",
+    "category": "ocean",
+    "temperature": 0.5,
+    "precipitation": "rain",
+    "depth": -1,
+    "dimension": "overworld",
+    "displayName": "Ocean",
+    "color": 112,
+    "rainfall": 0.5
+  },
+  {
+    "id": 1,
+    "name": "plains",
+    "name_legacy": "plains",
+    "category": "plains",
+    "temperature": 0.8,
+    "precipitation": "rain",
+    "depth": 0.125,
+    "dimension": "overworld",
+    "displayName": "Plains",
+    "color": 9286496,
+    "rainfall": 0.4
+  },
+  {
+    "id": 2,
+    "name": "desert",
+    "name_legacy": "desert",
+    "category": "desert",
+    "temperature": 2,
+    "precipitation": "none",
+    "depth": 0.125,
+    "dimension": "overworld",
+    "displayName": "Desert",
+    "color": 16421912,
+    "rainfall": 0
+  },
+  {
+    "id": 3,
+    "name": "mountains",
+    "name_legacy": "mountains",
+    "category": "extreme_hills",
+    "temperature": 0.2,
+    "precipitation": "rain",
+    "depth": 1,
+    "dimension": "overworld",
+    "displayName": "Extreme Hills",
+    "color": 6316128,
+    "rainfall": 0.3
+  },
+  {
+    "id": 4,
+    "name": "forest",
+    "name_legacy": "forest",
+    "category": "forest",
+    "temperature": 0.7,
+    "precipitation": "rain",
+    "depth": 0.1,
+    "dimension": "overworld",
+    "displayName": "Forest",
+    "color": 353825,
+    "rainfall": 0.8
+  },
+  {
+    "id": 5,
+    "name": "taiga",
+    "name_legacy": "taiga",
+    "category": "taiga",
+    "temperature": 0.25,
+    "precipitation": "rain",
+    "depth": 0.2,
+    "dimension": "overworld",
+    "displayName": "Taiga",
+    "color": 747097,
+    "rainfall": 0.8
+  },
+  {
+    "id": 6,
+    "name": "swamp",
+    "name_legacy": "swamp",
+    "category": "swamp",
+    "temperature": 0.8,
+    "precipitation": "rain",
+    "depth": -0.2,
+    "dimension": "overworld",
+    "displayName": "Swampland",
+    "color": 522674,
+    "rainfall": 0.9
+  },
+  {
+    "id": 7,
+    "name": "river",
+    "name_legacy": "river",
+    "category": "river",
+    "temperature": 0.5,
+    "precipitation": "rain",
+    "depth": -0.5,
+    "dimension": "overworld",
+    "displayName": "River",
+    "color": 255,
+    "rainfall": 0.5
+  },
+  {
+    "id": 8,
+    "name": "nether_wastes",
+    "name_legacy": "nether_wastes",
+    "category": "nether",
+    "temperature": 2,
+    "precipitation": "none",
+    "depth": 0.1,
+    "dimension": "nether",
+    "displayName": "Hell",
+    "color": 12532539,
+    "rainfall": 0,
+    "climates": [
+      {
+        "temperature": 0,
+        "humidity": 0,
+        "altitude": 0,
+        "weirdness": 0,
+        "offset": 0
+      }
+    ]
+  },
+  {
+    "id": 9,
+    "name": "the_end",
+    "name_legacy": "the_end",
+    "category": "the_end",
+    "temperature": 0.5,
+    "precipitation": "none",
+    "depth": 0.1,
+    "dimension": "end",
+    "displayName": "The End",
+    "color": 8421631,
+    "rainfall": 0.5
+  },
+  {
+    "id": 10,
+    "name": "frozen_ocean",
+    "name_legacy": "frozen_ocean",
+    "category": "ocean",
+    "temperature": 0,
+    "precipitation": "snow",
+    "depth": -1,
+    "dimension": "overworld",
+    "displayName": "Frozen Ocean",
+    "color": 7368918,
+    "rainfall": 0.5
+  },
+  {
+    "id": 11,
+    "name": "frozen_river",
+    "name_legacy": "frozen_river",
+    "category": "river",
+    "temperature": 0,
+    "precipitation": "snow",
+    "depth": -0.5,
+    "dimension": "overworld",
+    "displayName": "Frozen River",
+    "color": 10526975,
+    "rainfall": 0.5
+  },
+  {
+    "id": 12,
+    "name": "snowy_tundra",
+    "name_legacy": "snowy_tundra",
+    "category": "icy",
+    "temperature": 0,
+    "precipitation": "snow",
+    "depth": 0.125,
+    "dimension": "overworld",
+    "displayName": "Ice Plains",
+    "color": 16777215,
+    "rainfall": 0.5
+  },
+  {
+    "id": 13,
+    "name": "snowy_mountains",
+    "name_legacy": "snowy_mountains",
+    "category": "icy",
+    "temperature": 0,
+    "precipitation": "snow",
+    "depth": 0.45,
+    "dimension": "overworld",
+    "displayName": "Ice Mountains",
+    "color": 10526880,
+    "rainfall": 0.5
+  },
+  {
+    "id": 14,
+    "name": "mushroom_fields",
+    "name_legacy": "mushroom_fields",
+    "category": "mushroom",
+    "temperature": 0.9,
+    "precipitation": "rain",
+    "depth": 0.2,
+    "dimension": "overworld",
+    "displayName": "Mushroom Island",
+    "color": 16711935,
+    "rainfall": 1
+  },
+  {
+    "id": 15,
+    "name": "mushroom_field_shore",
+    "name_legacy": "mushroom_field_shore",
+    "category": "mushroom",
+    "temperature": 0.9,
+    "precipitation": "rain",
+    "depth": 0,
+    "dimension": "overworld",
+    "displayName": "Mushroom Island Shore",
+    "color": 10486015,
+    "rainfall": 1
+  },
+  {
+    "id": 16,
+    "name": "beach",
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+  {
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+    "displayName": "Ice Plains M",
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+  }
+]

mc/data/minecraft-data/pc/1.8/blockCollisionShapes.json

@@ -0,0 +1,274 @@
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mc/data/minecraft-data/pc/1.8/effects.json

@@ -0,0 +1,140 @@
+[
+  {
+    "id": 1,
+    "name": "Speed",
+    "displayName": "Speed",
+    "type": "good"
+  },
+  {
+    "id": 2,
+    "name": "Slowness",
+    "displayName": "Slowness",
+    "type": "bad"
+  },
+  {
+    "id": 3,
+    "name": "Haste",
+    "displayName": "Haste",
+    "type": "good"
+  },
+  {
+    "id": 4,
+    "name": "MiningFatigue",
+    "displayName": "Mining Fatigue",
+    "type": "bad"
+  },
+  {
+    "id": 5,
+    "name": "Strength",
+    "displayName": "Strength",
+    "type": "good"
+  },
+  {
+    "id": 6,
+    "name": "InstantHealth",
+    "displayName": "Instant Health",
+    "type": "good"
+  },
+  {
+    "id": 7,
+    "name": "InstantDamage",
+    "displayName": "Instant Damage",
+    "type": "bad"
+  },
+  {
+    "id": 8,
+    "name": "JumpBoost",
+    "displayName": "Jump Boost",
+    "type": "good"
+  },
+  {
+    "id": 9,
+    "name": "Nausea",
+    "displayName": "Nausea",
+    "type": "bad"
+  },
+  {
+    "id": 10,
+    "name": "Regeneration",
+    "displayName": "Regeneration",
+    "type": "good"
+  },
+  {
+    "id": 11,
+    "name": "Resistance",
+    "displayName": "Resistance",
+    "type": "good"
+  },
+  {
+    "id": 12,
+    "name": "FireResistance",
+    "displayName": "Fire Resistance",
+    "type": "good"
+  },
+  {
+    "id": 13,
+    "name": "WaterBreathing",
+    "displayName": "Water Breathing",
+    "type": "good"
+  },
+  {
+    "id": 14,
+    "name": "Invisibility",
+    "displayName": "Invisibility",
+    "type": "good"
+  },
+  {
+    "id": 15,
+    "name": "Blindness",
+    "displayName": "Blindness",
+    "type": "bad"
+  },
+  {
+    "id": 16,
+    "name": "NightVision",
+    "displayName": "Night Vision",
+    "type": "good"
+  },
+  {
+    "id": 17,
+    "name": "Hunger",
+    "displayName": "Hunger",
+    "type": "bad"
+  },
+  {
+    "id": 18,
+    "name": "Weakness",
+    "displayName": "Weakness",
+    "type": "bad"
+  },
+  {
+    "id": 19,
+    "name": "Poison",
+    "displayName": "Poison",
+    "type": "bad"
+  },
+  {
+    "id": 20,
+    "name": "Wither",
+    "displayName": "Wither",
+    "type": "bad"
+  },
+  {
+    "id": 21,
+    "name": "HealthBoost",
+    "displayName": "Health Boost",
+    "type": "good"
+  },
+  {
+    "id": 22,
+    "name": "Absorption",
+    "displayName": "Absorption",
+    "type": "good"
+  },
+  {
+    "id": 23,
+    "name": "Saturation",
+    "displayName": "Saturation",
+    "type": "good"
+  }
+]

mc/data/minecraft-data/pc/1.8/enchantments.json

@@ -0,0 +1,560 @@
+[
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+    "name": "protection",
+    "displayName": "Protection",
+    "maxLevel": 4,
+    "minCost": {
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+      "b": -10
+    },
+    "maxCost": {
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+      "b": 1
+    },
+    "exclude": [
+      "blast_protection",
+      "fire_protection",
+      "projectile_protection"
+    ],
+    "category": "armor",
+    "weight": 10,
+    "treasureOnly": false,
+    "curse": false,
+    "tradeable": true,
+    "discoverable": true
+  },
+  {
+    "id": 1,
+    "name": "fire_protection",
+    "displayName": "Fire Protection",
+    "maxLevel": 4,
+    "minCost": {
+      "a": 8,
+      "b": 2
+    },
+    "maxCost": {
+      "a": 8,
+      "b": 10
+    },
+    "exclude": [
+      "blast_protection",
+      "protection",
+      "projectile_protection"
+    ],
+    "category": "armor",
+    "weight": 5,
+    "treasureOnly": false,
+    "curse": false,
+    "tradeable": true,
+    "discoverable": true
+  },
+  {
+    "id": 2,
+    "name": "feather_falling",
+    "displayName": "Feather Falling",
+    "maxLevel": 4,
+    "minCost": {
+      "a": 6,
+      "b": -1
+    },
+    "maxCost": {
+      "a": 6,
+      "b": 5
+    },
+    "exclude": [],
+    "category": "armor_feet",
+    "weight": 5,
+    "treasureOnly": false,
+    "curse": false,
+    "tradeable": true,
+    "discoverable": true
+  },
+  {
+    "id": 3,
+    "name": "blast_protection",
+    "displayName": "Blast Protection",
+    "maxLevel": 4,
+    "minCost": {
+      "a": 8,
+      "b": -3
+    },
+    "maxCost": {
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+      "b": 5
+    },
+    "exclude": [
+      "fire_protection",
+      "protection",
+      "projectile_protection"
+    ],
+    "category": "armor",
+    "weight": 2,
+    "treasureOnly": false,
+    "curse": false,
+    "tradeable": true,
+    "discoverable": true
+  },
+  {
+    "id": 4,
+    "name": "projectile_protection",
+    "displayName": "Projectile Protection",
+    "maxLevel": 4,
+    "minCost": {
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+      "b": -3
+    },
+    "maxCost": {
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+      "b": 3
+    },
+    "exclude": [
+      "protection",
+      "blast_protection",
+      "fire_protection"
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+    "treasureOnly": false,
+    "curse": false,
+    "tradeable": true,
+    "discoverable": true
+  },
+  {
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+    "name": "respiration",
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+      "b": 0
+    },
+    "maxCost": {
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+    },
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+    "category": "armor_head",
+    "weight": 2,
+    "treasureOnly": false,
+    "curse": false,
+    "tradeable": true,
+    "discoverable": true
+  },
+  {
+    "id": 6,
+    "name": "aqua_affinity",
+    "displayName": "Aqua Affinity",
+    "maxLevel": 1,
+    "minCost": {
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+      "b": 1
+    },
+    "maxCost": {
+      "a": 0,
+      "b": 41
+    },
+    "exclude": [],
+    "category": "armor_head",
+    "weight": 2,
+    "treasureOnly": false,
+    "curse": false,
+    "tradeable": true,
+    "discoverable": true
+  },
+  {
+    "id": 7,
+    "name": "thorns",
+    "displayName": "Thorns",
+    "maxLevel": 3,
+    "minCost": {
+      "a": 20,
+      "b": -10
+    },
+    "maxCost": {
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+      "b": 51
+    },
+    "exclude": [],
+    "category": "armor_chest",
+    "weight": 1,
+    "treasureOnly": false,
+    "curse": false,
+    "tradeable": true,
+    "discoverable": true
+  },
+  {
+    "id": 8,
+    "name": "depth_strider",
+    "displayName": "Depth Strider",
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+    "minCost": {
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+      "b": 0
+    },
+    "maxCost": {
+      "a": 10,
+      "b": 15
+    },
+    "exclude": [
+      "frost_walker"
+    ],
+    "category": "armor_feet",
+    "weight": 2,
+    "treasureOnly": false,
+    "curse": false,
+    "tradeable": true,
+    "discoverable": true
+  },
+  {
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+    "name": "sharpness",
+    "displayName": "Sharpness",
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+    },
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+      "bane_of_arthropods"
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+    "category": "weapon",
+    "weight": 10,
+    "treasureOnly": false,
+    "curse": false,
+    "tradeable": true,
+    "discoverable": true
+  },
+  {
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+    "name": "smite",
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+    "minCost": {
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+    "curse": false,
+    "tradeable": true,
+    "discoverable": true
+  },
+  {
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+    "name": "bane_of_arthropods",
+    "displayName": "Bane of Arthropods",
+    "maxLevel": 5,
+    "minCost": {
+      "a": 8,
+      "b": -3
+    },
+    "maxCost": {
+      "a": 8,
+      "b": 17
+    },
+    "exclude": [
+      "smite",
+      "sharpness"
+    ],
+    "category": "weapon",
+    "weight": 5,
+    "treasureOnly": false,
+    "curse": false,
+    "tradeable": true,
+    "discoverable": true
+  },
+  {
+    "id": 19,
+    "name": "knockback",
+    "displayName": "Knockback",
+    "maxLevel": 2,
+    "minCost": {
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+      "b": -15
+    },
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+    },
+    "exclude": [],
+    "category": "weapon",
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+    "treasureOnly": false,
+    "curse": false,
+    "tradeable": true,
+    "discoverable": true
+  },
+  {
+    "id": 20,
+    "name": "fire_aspect",
+    "displayName": "Fire Aspect",
+    "maxLevel": 2,
+    "minCost": {
+      "a": 20,
+      "b": -10
+    },
+    "maxCost": {
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+      "b": 51
+    },
+    "exclude": [],
+    "category": "weapon",
+    "weight": 2,
+    "treasureOnly": false,
+    "curse": false,
+    "tradeable": true,
+    "discoverable": true
+  },
+  {
+    "id": 21,
+    "name": "looting",
+    "displayName": "Looting",
+    "maxLevel": 3,
+    "minCost": {
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+      "b": 6
+    },
+    "maxCost": {
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+      "b": 51
+    },
+    "exclude": [],
+    "category": "weapon",
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+    "treasureOnly": false,
+    "curse": false,
+    "tradeable": true,
+    "discoverable": true
+  },
+  {
+    "id": 32,
+    "name": "efficiency",
+    "displayName": "Efficiency",
+    "maxLevel": 5,
+    "minCost": {
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+      "b": -9
+    },
+    "maxCost": {
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+      "b": 51
+    },
+    "exclude": [],
+    "category": "digger",
+    "weight": 10,
+    "treasureOnly": false,
+    "curse": false,
+    "tradeable": true,
+    "discoverable": true
+  },
+  {
+    "id": 33,
+    "name": "silk_touch",
+    "displayName": "Silk Touch",
+    "maxLevel": 1,
+    "minCost": {
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+      "b": 15
+    },
+    "maxCost": {
+      "a": 10,
+      "b": 51
+    },
+    "exclude": [
+      "fortune"
+    ],
+    "category": "digger",
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+    "treasureOnly": false,
+    "curse": false,
+    "tradeable": true,
+    "discoverable": true
+  },
+  {
+    "id": 34,
+    "name": "unbreaking",
+    "displayName": "Unbreaking",
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+    "minCost": {
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+      "b": -3
+    },
+    "maxCost": {
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+    },
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+    "category": "breakable",
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+    "treasureOnly": false,
+    "curse": false,
+    "tradeable": true,
+    "discoverable": true
+  },
+  {
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+    "name": "fortune",
+    "displayName": "Fortune",
+    "maxLevel": 3,
+    "minCost": {
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+      "b": 6
+    },
+    "maxCost": {
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+      "b": 51
+    },
+    "exclude": [
+      "silk_touch"
+    ],
+    "category": "digger",
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+    "treasureOnly": false,
+    "curse": false,
+    "tradeable": true,
+    "discoverable": true
+  },
+  {
+    "id": 48,
+    "name": "power",
+    "displayName": "Power",
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+    "minCost": {
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+      "b": -9
+    },
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+    },
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+    "category": "bow",
+    "weight": 10,
+    "treasureOnly": false,
+    "curse": false,
+    "tradeable": true,
+    "discoverable": true
+  },
+  {
+    "id": 49,
+    "name": "punch",
+    "displayName": "Punch",
+    "maxLevel": 2,
+    "minCost": {
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+      "b": -8
+    },
+    "maxCost": {
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+      "b": 17
+    },
+    "exclude": [],
+    "category": "bow",
+    "weight": 2,
+    "treasureOnly": false,
+    "curse": false,
+    "tradeable": true,
+    "discoverable": true
+  },
+  {
+    "id": 50,
+    "name": "flame",
+    "displayName": "Flame",
+    "maxLevel": 1,
+    "minCost": {
+      "a": 0,
+      "b": 20
+    },
+    "maxCost": {
+      "a": 0,
+      "b": 50
+    },
+    "exclude": [],
+    "category": "bow",
+    "weight": 2,
+    "treasureOnly": false,
+    "curse": false,
+    "tradeable": true,
+    "discoverable": true
+  },
+  {
+    "id": 51,
+    "name": "infinity",
+    "displayName": "Infinity",
+    "maxLevel": 1,
+    "minCost": {
+      "a": 0,
+      "b": 20
+    },
+    "maxCost": {
+      "a": 0,
+      "b": 50
+    },
+    "exclude": [
+      "mending"
+    ],
+    "category": "bow",
+    "weight": 1,
+    "treasureOnly": false,
+    "curse": false,
+    "tradeable": true,
+    "discoverable": true
+  },
+  {
+    "id": 61,
+    "name": "luck_of_the_sea",
+    "displayName": "Luck of the Sea",
+    "maxLevel": 3,
+    "minCost": {
+      "a": 9,
+      "b": 6
+    },
+    "maxCost": {
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+      "b": 51
+    },
+    "exclude": [],
+    "category": "fishing_rod",
+    "weight": 2,
+    "treasureOnly": false,
+    "curse": false,
+    "tradeable": true,
+    "discoverable": true
+  },
+  {
+    "id": 62,
+    "name": "lure",
+    "displayName": "Lure",
+    "maxLevel": 3,
+    "minCost": {
+      "a": 9,
+      "b": 6
+    },
+    "maxCost": {
+      "a": 10,
+      "b": 51
+    },
+    "exclude": [],
+    "category": "fishing_rod",
+    "weight": 2,
+    "treasureOnly": false,
+    "curse": false,
+    "tradeable": true,
+    "discoverable": true
+  }
+]

mc/data/minecraft-data/pc/1.8/entities.json

@@ -0,0 +1,580 @@
+[
+  {
+    "id": 48,
+    "internalId": 48,
+    "name": "Mob",
+    "displayName": "Mob",
+    "type": "mob",
+    "width": null,
+    "height": null,
+    "category": "Generic"
+  },
+  {
+    "id": 49,
+    "internalId": 49,
+    "name": "Monster",
+    "displayName": "Monster",
+    "type": "mob",
+    "width": null,
+    "height": null,
+    "category": "Generic"
+  },
+  {
+    "id": 50,
+    "internalId": 50,
+    "name": "Creeper",
+    "displayName": "Creeper",
+    "type": "mob",
+    "width": 0.6,
+    "height": 1.8,
+    "category": "Hostile mobs"
+  },
+  {
+    "id": 51,
+    "internalId": 51,
+    "name": "Skeleton",
+    "displayName": "Skeleton",
+    "type": "mob",
+    "width": 0.6,
+    "height": 1.95,
+    "category": "Hostile mobs"
+  },
+  {
+    "id": 52,
+    "internalId": 52,
+    "name": "Spider",
+    "displayName": "Spider",
+    "type": "mob",
+    "width": 1.4,
+    "height": 0.9,
+    "category": "Hostile mobs"
+  },
+  {
+    "id": 53,
+    "internalId": 53,
+    "name": "Giant",
+    "displayName": "Giant",
+    "type": "mob",
+    "width": 3.5999999999999996,
+    "height": 10.8,
+    "category": "Hostile mobs"
+  },
+  {
+    "id": 54,
+    "internalId": 54,
+    "name": "Zombie",
+    "displayName": "Zombie",
+    "type": "mob",
+    "width": 0.6,
+    "height": 1.8,
+    "category": "Hostile mobs"
+  },
+  {
+    "id": 55,
+    "internalId": 55,
+    "name": "Slime",
+    "displayName": "Slime",
+    "type": "mob",
+    "width": 0.51000005,
+    "height": 0.51000005,
+    "category": "Hostile mobs"
+  },
+  {
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+    "internalId": 56,
+    "name": "Ghast",
+    "displayName": "Ghast",
+    "type": "mob",
+    "width": 4,
+    "height": 4,
+    "category": "Hostile mobs"
+  },
+  {
+    "id": 57,
+    "internalId": 57,
+    "name": "PigZombie",
+    "displayName": "Zombie Pigman",
+    "type": "mob",
+    "width": 0.6,
+    "height": 1.8,
+    "category": "Hostile mobs"
+  },
+  {
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+    "internalId": 58,
+    "name": "Enderman",
+    "displayName": "Enderman",
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+    "category": "Hostile mobs"
+  },
+  {
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+    "internalId": 59,
+    "name": "CaveSpider",
+    "displayName": "Cave Spider",
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+    "height": 0.5,
+    "category": "Hostile mobs"
+  },
+  {
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+    "internalId": 60,
+    "name": "Silverfish",
+    "displayName": "Silverfish",
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+    "height": 0.3,
+    "category": "Hostile mobs"
+  },
+  {
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+    "internalId": 61,
+    "name": "Blaze",
+    "displayName": "Blaze",
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+    "height": 1.8,
+    "category": "Hostile mobs"
+  },
+  {
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+    "internalId": 62,
+    "name": "LavaSlime",
+    "displayName": "Magma Cube",
+    "type": "mob",
+    "width": 0.51000005,
+    "height": 0.51000005,
+    "category": "Hostile mobs"
+  },
+  {
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+    "internalId": 63,
+    "name": "EnderDragon",
+    "displayName": "Ender Dragon",
+    "type": "mob",
+    "width": 16,
+    "height": 8,
+    "category": "Hostile mobs"
+  },
+  {
+    "id": 64,
+    "internalId": 64,
+    "name": "WitherBoss",
+    "displayName": "Wither",
+    "type": "mob",
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+    "height": 3.5,
+    "category": "Hostile mobs"
+  },
+  {
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+    "internalId": 65,
+    "name": "Bat",
+    "displayName": "Bat",
+    "type": "mob",
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+    "height": 0.9,
+    "category": "Passive mobs"
+  },
+  {
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+    "internalId": 66,
+    "name": "Witch",
+    "displayName": "Witch",
+    "type": "mob",
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+    "height": 1.8,
+    "category": "Hostile mobs"
+  },
+  {
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+    "internalId": 67,
+    "name": "Endermite",
+    "displayName": "Endermite",
+    "type": "mob",
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+    "height": 0.3,
+    "category": "Hostile mobs"
+  },
+  {
+    "id": 68,
+    "internalId": 68,
+    "name": "Guardian",
+    "displayName": "Guardian",
+    "type": "mob",
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+    "height": 0.85,
+    "category": "Hostile mobs"
+  },
+  {
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+    "internalId": 90,
+    "name": "Pig",
+    "displayName": "Pig",
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+    "height": 0.9,
+    "category": "Passive mobs"
+  },
+  {
+    "id": 91,
+    "internalId": 91,
+    "name": "Sheep",
+    "displayName": "Sheep",
+    "type": "mob",
+    "width": 0.9,
+    "height": 1.3,
+    "category": "Passive mobs"
+  },
+  {
+    "id": 92,
+    "internalId": 92,
+    "name": "Cow",
+    "displayName": "Cow",
+    "type": "mob",
+    "width": 0.9,
+    "height": 1.3,
+    "category": "Passive mobs"
+  },
+  {
+    "id": 93,
+    "internalId": 93,
+    "name": "Chicken",
+    "displayName": "Chicken",
+    "type": "mob",
+    "width": 0.4,
+    "height": 0.7,
+    "category": "Passive mobs"
+  },
+  {
+    "id": 94,
+    "internalId": 94,
+    "name": "Squid",
+    "displayName": "Squid",
+    "type": "mob",
+    "width": 0.95,
+    "height": 0.95,
+    "category": "Passive mobs"
+  },
+  {
+    "id": 95,
+    "internalId": 95,
+    "name": "Wolf",
+    "displayName": "Wolf",
+    "type": "mob",
+    "width": 0.6,
+    "height": 0.8,
+    "category": "Passive mobs"
+  },
+  {
+    "id": 96,
+    "internalId": 96,
+    "name": "MushroomCow",
+    "displayName": "Mooshroom",
+    "type": "mob",
+    "width": 0.9,
+    "height": 1.3,
+    "category": "Passive mobs"
+  },
+  {
+    "id": 97,
+    "internalId": 97,
+    "name": "SnowMan",
+    "displayName": "Snow Golem",
+    "type": "mob",
+    "width": 0.7,
+    "height": 1.9,
+    "category": "Passive mobs"
+  },
+  {
+    "id": 98,
+    "internalId": 98,
+    "name": "Ozelot",
+    "displayName": "Ocelot",
+    "type": "mob",
+    "width": 0.6,
+    "height": 0.8,
+    "category": "Passive mobs"
+  },
+  {
+    "id": 99,
+    "internalId": 99,
+    "name": "VillagerGolem",
+    "displayName": "Iron Golem",
+    "type": "mob",
+    "width": 1.4,
+    "height": 2.9,
+    "category": "Passive mobs"
+  },
+  {
+    "id": 100,
+    "internalId": 100,
+    "name": "EntityHorse",
+    "displayName": "Horse",
+    "type": "mob",
+    "width": 1.4,
+    "height": 1.6,
+    "category": "Passive mobs"
+  },
+  {
+    "id": 101,
+    "internalId": 101,
+    "name": "Rabbit",
+    "displayName": "Rabbit",
+    "type": "mob",
+    "width": 0.6,
+    "height": 0.7,
+    "category": "Passive mobs"
+  },
+  {
+    "id": 120,
+    "internalId": 120,
+    "name": "Villager",
+    "displayName": "Villager",
+    "type": "mob",
+    "width": 0.6,
+    "height": 1.8,
+    "category": "NPCs"
+  },
+  {
+    "id": 1,
+    "internalId": 41,
+    "name": "Boat",
+    "displayName": "Boat",
+    "type": "object",
+    "width": 1.5,
+    "height": 0.6,
+    "category": "Vehicles"
+  },
+  {
+    "id": 2,
+    "internalId": 1,
+    "name": "Item",
+    "displayName": "Dropped item",
+    "type": "object",
+    "width": 0.25,
+    "height": 0.25,
+    "category": "Drops"
+  },
+  {
+    "id": 10,
+    "internalId": 42,
+    "name": "MinecartRideable",
+    "displayName": "Minecart",
+    "type": "object",
+    "width": 0.98,
+    "height": 0.7,
+    "category": "Vehicles"
+  },
+  {
+    "id": 11,
+    "internalId": 42,
+    "name": "MinecartRideable",
+    "displayName": "Minecart",
+    "type": "object",
+    "width": 0.98,
+    "height": 0.7,
+    "category": "Vehicles"
+  },
+  {
+    "id": 12,
+    "internalId": 42,
+    "name": "MinecartRideable",
+    "displayName": "Minecart",
+    "type": "object",
+    "width": 0.98,
+    "height": 0.7,
+    "category": "Vehicles"
+  },
+  {
+    "id": 50,
+    "internalId": 20,
+    "name": "PrimedTnt",
+    "displayName": "Primed TNT",
+    "type": "object",
+    "width": 0.98,
+    "height": 0.98,
+    "category": "Blocks"
+  },
+  {
+    "id": 51,
+    "internalId": 200,
+    "name": "EnderCrystal",
+    "displayName": "Ender Crystal",
+    "type": "object",
+    "width": 2,
+    "height": 2,
+    "category": "Immobile"
+  },
+  {
+    "id": 60,
+    "internalId": 10,
+    "name": "Arrow",
+    "displayName": "Shot arrow",
+    "type": "object",
+    "width": 0.5,
+    "height": 0.5,
+    "category": "Projectiles"
+  },
+  {
+    "id": 61,
+    "internalId": 11,
+    "name": "Snowball",
+    "displayName": "Thrown snowball",
+    "type": "object",
+    "width": 0.25,
+    "height": 0.25,
+    "category": "Projectiles"
+  },
+  {
+    "id": 62,
+    "internalId": 7,
+    "name": "ThrownEgg",
+    "displayName": "Thrown egg",
+    "type": "object",
+    "width": 0.25,
+    "height": 0.25,
+    "category": "Projectiles"
+  },
+  {
+    "id": 63,
+    "internalId": 12,
+    "name": "Fireball",
+    "displayName": "Ghast fireball",
+    "type": "object",
+    "width": 1,
+    "height": 1,
+    "category": "Projectiles"
+  },
+  {
+    "id": 64,
+    "internalId": 13,
+    "name": "SmallFireball",
+    "displayName": "Blaze fireball",
+    "type": "object",
+    "width": 0.3125,
+    "height": 0.3125,
+    "category": "Projectiles"
+  },
+  {
+    "id": 65,
+    "internalId": 14,
+    "name": "ThrownEnderpearl",
+    "displayName": "Thrown Ender Pearl",
+    "type": "object",
+    "width": 0.25,
+    "height": 0.25,
+    "category": "Projectiles"
+  },
+  {
+    "id": 66,
+    "internalId": 19,
+    "name": "WitherSkull",
+    "displayName": "Wither Skull",
+    "type": "object",
+    "width": 0.3125,
+    "height": 0.3125,
+    "category": "Projectiles"
+  },
+  {
+    "id": 70,
+    "internalId": 21,
+    "name": "FallingSand",
+    "displayName": "Falling block",
+    "type": "object",
+    "width": 0.98,
+    "height": 0.98,
+    "category": "Blocks"
+  },
+  {
+    "id": 71,
+    "internalId": 18,
+    "name": "ItemFrame",
+    "displayName": "Item Frame",
+    "type": "object",
+    "width": null,
+    "height": null,
+    "category": "Immobile"
+  },
+  {
+    "id": 72,
+    "internalId": 15,
+    "name": "EyeOfEnderSignal",
+    "displayName": "Thrown Eye of Ender",
+    "type": "object",
+    "width": 0.25,
+    "height": 0.25,
+    "category": "Projectiles"
+  },
+  {
+    "id": 73,
+    "internalId": 16,
+    "name": "ThrownPotion",
+    "displayName": "Thrown splash potion",
+    "type": "object",
+    "width": 0.25,
+    "height": 0.25,
+    "category": "Projectiles"
+  },
+  {
+    "id": 74,
+    "internalId": 21,
+    "name": "FallingSand",
+    "displayName": "Falling block",
+    "type": "object",
+    "width": 0.98,
+    "height": 0.98,
+    "category": "Blocks"
+  },
+  {
+    "id": 75,
+    "internalId": 17,
+    "name": "ThrownExpBottle",
+    "displayName": "Thrown Bottle o' Enchanting",
+    "type": "object",
+    "width": 0.25,
+    "height": 0.25,
+    "category": "Projectiles"
+  },
+  {
+    "id": 76,
+    "internalId": 22,
+    "name": "FireworksRocketEntity",
+    "displayName": "Firework Rocket",
+    "type": "object",
+    "width": 0.25,
+    "height": 0.25,
+    "category": "Projectiles"
+  },
+  {
+    "id": 77,
+    "internalId": 8,
+    "name": "LeashKnot",
+    "displayName": "Lead knot",
+    "type": "object",
+    "width": 0.5,
+    "height": 0.5,
+    "category": "Immobile"
+  },
+  {
+    "id": 78,
+    "internalId": 30,
+    "name": "ArmorStand",
+    "displayName": "Armor Stand",
+    "type": "object",
+    "width": 0.5,
+    "height": 2,
+    "category": "Immobile"
+  },
+  {
+    "id": 90,
+    "name": "Fishing Float",
+    "displayName": "Fishing Float",
+    "type": "object",
+    "width": 0.25,
+    "height": 0.25
+  }
+]

mc/data/minecraft-data/pc/1.8/foods.json

@@ -0,0 +1,310 @@
+[
+  {
+    "id": 103,
+    "displayName": "Melon",
+    "name": "melon_block",
+    "stackSize": 64,
+    "foodPoints": 2,
+    "saturation": 1.2,
+    "effectiveQuality": 3.2,
+    "saturationRatio": 0.6
+  },
+  {
+    "id": 141,
+    "displayName": "Carrot",
+    "name": "carrots",
+    "stackSize": 64,
+    "foodPoints": 3,
+    "saturation": 4.8,
+    "effectiveQuality": 7.8,
+    "saturationRatio": 1.5999999999999999
+  },
+  {
+    "id": 142,
+    "displayName": "Potato",
+    "name": "potatoes",
+    "stackSize": 64,
+    "foodPoints": 1,
+    "saturation": 0.6,
+    "effectiveQuality": 1.6,
+    "saturationRatio": 0.6
+  },
+  {
+    "id": 260,
+    "displayName": "Apple",
+    "stackSize": 64,
+    "name": "apple",
+    "foodPoints": 4,
+    "saturation": 2.4,
+    "effectiveQuality": 6.4,
+    "saturationRatio": 0.6
+  },
+  {
+    "id": 282,
+    "displayName": "Mushroom Stew",
+    "stackSize": 1,
+    "name": "mushroom_stew",
+    "foodPoints": 6,
+    "saturation": 7.2,
+    "effectiveQuality": 13.2,
+    "saturationRatio": 1.2
+  },
+  {
+    "id": 297,
+    "displayName": "Bread",
+    "stackSize": 64,
+    "name": "bread",
+    "foodPoints": 5,
+    "saturation": 6,
+    "effectiveQuality": 11,
+    "saturationRatio": 1.2
+  },
+  {
+    "id": 319,
+    "displayName": "Raw Porkchop",
+    "stackSize": 64,
+    "name": "porkchop",
+    "foodPoints": 3,
+    "saturation": 1.8,
+    "effectiveQuality": 4.8,
+    "saturationRatio": 0.6
+  },
+  {
+    "id": 320,
+    "displayName": "Cooked Porkchop",
+    "stackSize": 64,
+    "name": "cooked_porkchop",
+    "foodPoints": 8,
+    "saturation": 12.8,
+    "effectiveQuality": 20.8,
+    "saturationRatio": 1.6
+  },
+  {
+    "id": 322,
+    "displayName": "Golden Apple",
+    "stackSize": 64,
+    "name": "golden_apple",
+    "variations": [
+      {
+        "metadata": 0,
+        "displayName": "Golden Apple"
+      },
+      {
+        "metadata": 1,
+        "displayName": "Enchanted Golden Apple"
+      }
+    ],
+    "foodPoints": 4,
+    "saturation": 9.6,
+    "effectiveQuality": 13.6,
+    "saturationRatio": 2.4
+  },
+  {
+    "id": 349,
+    "displayName": "Raw Fish",
+    "stackSize": 64,
+    "name": "fish",
+    "variations": [
+      {
+        "metadata": 0,
+        "displayName": "Raw Fish"
+      },
+      {
+        "metadata": 1,
+        "displayName": "Raw Salmon"
+      },
+      {
+        "metadata": 2,
+        "displayName": "Clownfish"
+      },
+      {
+        "metadata": 3,
+        "displayName": "Pufferfish"
+      }
+    ],
+    "foodPoints": 2,
+    "saturation": 0.4,
+    "effectiveQuality": 2.4,
+    "saturationRatio": 0.2
+  },
+  {
+    "id": 350,
+    "displayName": "Cooked Fish",
+    "stackSize": 64,
+    "name": "cooked_fish",
+    "foodPoints": 5,
+    "saturation": 6,
+    "effectiveQuality": 11,
+    "saturationRatio": 1.2
+  },
+  {
+    "id": 354,
+    "displayName": "Cake",
+    "stackSize": 1,
+    "name": "cake",
+    "foodPoints": 2,
+    "saturation": 0.4,
+    "effectiveQuality": 2.4,
+    "saturationRatio": 0.2
+  },
+  {
+    "id": 357,
+    "displayName": "Cookie",
+    "stackSize": 64,
+    "name": "cookie",
+    "foodPoints": 2,
+    "saturation": 0.4,
+    "effectiveQuality": 2.4,
+    "saturationRatio": 0.2
+  },
+  {
+    "id": 363,
+    "displayName": "Raw Beef",
+    "stackSize": 64,
+    "name": "beef",
+    "foodPoints": 3,
+    "saturation": 1.8,
+    "effectiveQuality": 4.8,
+    "saturationRatio": 0.6
+  },
+  {
+    "id": 364,
+    "displayName": "Steak",
+    "stackSize": 64,
+    "name": "cooked_beef",
+    "foodPoints": 8,
+    "saturation": 12.8,
+    "effectiveQuality": 20.8,
+    "saturationRatio": 1.6
+  },
+  {
+    "id": 365,
+    "displayName": "Raw Chicken",
+    "stackSize": 64,
+    "name": "chicken",
+    "foodPoints": 2,
+    "saturation": 1.2,
+    "effectiveQuality": 3.2,
+    "saturationRatio": 0.6
+  },
+  {
+    "id": 366,
+    "displayName": "Cooked Chicken",
+    "stackSize": 64,
+    "name": "cooked_chicken",
+    "foodPoints": 6,
+    "saturation": 7.2,
+    "effectiveQuality": 13.2,
+    "saturationRatio": 1.2
+  },
+  {
+    "id": 367,
+    "displayName": "Rotten Flesh",
+    "stackSize": 64,
+    "name": "rotten_flesh",
+    "foodPoints": 4,
+    "saturation": 0.8,
+    "effectiveQuality": 4.8,
+    "saturationRatio": 0.2
+  },
+  {
+    "id": 375,
+    "displayName": "Spider Eye",
+    "stackSize": 64,
+    "name": "spider_eye",
+    "foodPoints": 2,
+    "saturation": 3.2,
+    "effectiveQuality": 5.2,
+    "saturationRatio": 1.6
+  },
+  {
+    "id": 393,
+    "displayName": "Baked Potato",
+    "stackSize": 64,
+    "name": "baked_potato",
+    "foodPoints": 5,
+    "saturation": 7.2,
+    "effectiveQuality": 12.2,
+    "saturationRatio": 1.44
+  },
+  {
+    "id": 394,
+    "displayName": "Poisonous Potato",
+    "stackSize": 64,
+    "name": "poisonous_potato",
+    "foodPoints": 2,
+    "saturation": 1.2,
+    "effectiveQuality": 3.2,
+    "saturationRatio": 0.6
+  },
+  {
+    "id": 396,
+    "displayName": "Golden Carrot",
+    "stackSize": 64,
+    "name": "golden_carrot",
+    "foodPoints": 6,
+    "saturation": 14.4,
+    "effectiveQuality": 20.4,
+    "saturationRatio": 2.4
+  },
+  {
+    "id": 400,
+    "displayName": "Pumpkin Pie",
+    "stackSize": 64,
+    "name": "pumpkin_pie",
+    "foodPoints": 8,
+    "saturation": 4.8,
+    "effectiveQuality": 12.8,
+    "saturationRatio": 0.6
+  },
+  {
+    "id": 411,
+    "displayName": "Raw Rabbit",
+    "stackSize": 64,
+    "name": "rabbit",
+    "foodPoints": 3,
+    "saturation": 1.8,
+    "effectiveQuality": 4.8,
+    "saturationRatio": 0.6
+  },
+  {
+    "id": 412,
+    "displayName": "Cooked Rabbit",
+    "stackSize": 64,
+    "name": "cooked_rabbit",
+    "foodPoints": 5,
+    "saturation": 6,
+    "effectiveQuality": 11,
+    "saturationRatio": 1.2
+  },
+  {
+    "id": 413,
+    "displayName": "Rabbit Stew",
+    "stackSize": 1,
+    "name": "rabbit_stew",
+    "foodPoints": 10,
+    "saturation": 12,
+    "effectiveQuality": 22,
+    "saturationRatio": 1.2
+  },
+  {
+    "id": 423,
+    "displayName": "Raw Mutton",
+    "stackSize": 64,
+    "name": "mutton",
+    "foodPoints": 2,
+    "saturation": 1.2,
+    "effectiveQuality": 3.2,
+    "saturationRatio": 0.6
+  },
+  {
+    "id": 424,
+    "displayName": "Cooked Mutton",
+    "stackSize": 64,
+    "name": "cooked_mutton",
+    "foodPoints": 6,
+    "saturation": 9.6,
+    "effectiveQuality": 15.6,
+    "saturationRatio": 1.5999999999999999
+  }
+]

mc/data/minecraft-data/pc/1.8/instruments.json

@@ -0,0 +1,22 @@
+[
+  {
+    "id": 0,
+    "name": "harp"
+  },
+  {
+    "id": 1,
+    "name": "doubleBass"
+  },
+  {
+    "id": 2,
+    "name": "snareDrum"
+  },
+  {
+    "id": 3,
+    "name": "sticks"
+  },
+  {
+    "id": 4,
+    "name": "bassDrum"
+  }
+]

mc/data/minecraft-data/pc/1.8/materials.json

@@ -0,0 +1,61 @@
+{
+  "rock": {
+    "257": 6,
+    "270": 2,
+    "274": 4,
+    "278": 8,
+    "285": 12
+  },
+  "wood": {
+    "258": 6,
+    "271": 2,
+    "275": 4,
+    "279": 8,
+    "286": 12
+  },
+  "plant": {
+    "258": 6,
+    "267": 1.5,
+    "268": 1.5,
+    "271": 2,
+    "272": 1.5,
+    "275": 4,
+    "276": 1.5,
+    "279": 8,
+    "283": 1.5,
+    "286": 12
+  },
+  "melon": {
+    "267": 1.5,
+    "268": 1.5,
+    "272": 1.5,
+    "276": 1.5,
+    "283": 1.5
+  },
+  "leaves": {
+    "267": 1.5,
+    "268": 1.5,
+    "272": 1.5,
+    "276": 1.5,
+    "283": 1.5,
+    "359": 6
+  },
+  "dirt": {
+    "256": 6,
+    "269": 2,
+    "273": 4,
+    "277": 8,
+    "284": 12
+  },
+  "web": {
+    "267": 15,
+    "268": 15,
+    "272": 15,
+    "276": 15,
+    "283": 15,
+    "359": 15
+  },
+  "wool": {
+    "359": 4.8
+  }
+}

mc/data/minecraft-data/pc/1.8/particles.json

@@ -0,0 +1,170 @@
+[
+  {
+    "id": 0,
+    "name": "explode"
+  },
+  {
+    "id": 1,
+    "name": "largeexplode"
+  },
+  {
+    "id": 2,
+    "name": "hugeexplosion"
+  },
+  {
+    "id": 3,
+    "name": "fireworksSpark"
+  },
+  {
+    "id": 4,
+    "name": "bubble"
+  },
+  {
+    "id": 5,
+    "name": "splash"
+  },
+  {
+    "id": 6,
+    "name": "wake"
+  },
+  {
+    "id": 7,
+    "name": "suspended"
+  },
+  {
+    "id": 8,
+    "name": "depthsuspend"
+  },
+  {
+    "id": 9,
+    "name": "crit"
+  },
+  {
+    "id": 10,
+    "name": "magicCrit"
+  },
+  {
+    "id": 11,
+    "name": "smoke"
+  },
+  {
+    "id": 12,
+    "name": "largesmoke"
+  },
+  {
+    "id": 13,
+    "name": "spell"
+  },
+  {
+    "id": 14,
+    "name": "instantSpell"
+  },
+  {
+    "id": 15,
+    "name": "mobSpell"
+  },
+  {
+    "id": 16,
+    "name": "mobSpellAmbient"
+  },
+  {
+    "id": 17,
+    "name": "witchMagic"
+  },
+  {
+    "id": 18,
+    "name": "dripWater"
+  },
+  {
+    "id": 19,
+    "name": "dripLava"
+  },
+  {
+    "id": 20,
+    "name": "angryVillager"
+  },
+  {
+    "id": 21,
+    "name": "happyVillager"
+  },
+  {
+    "id": 22,
+    "name": "townaura"
+  },
+  {
+    "id": 23,
+    "name": "note"
+  },
+  {
+    "id": 24,
+    "name": "portal"
+  },
+  {
+    "id": 25,
+    "name": "enchantmenttable"
+  },
+  {
+    "id": 26,
+    "name": "flame"
+  },
+  {
+    "id": 27,
+    "name": "lava"
+  },
+  {
+    "id": 28,
+    "name": "footstep"
+  },
+  {
+    "id": 29,
+    "name": "cloud"
+  },
+  {
+    "id": 30,
+    "name": "reddust"
+  },
+  {
+    "id": 31,
+    "name": "snowballpoof"
+  },
+  {
+    "id": 32,
+    "name": "snowshovel"
+  },
+  {
+    "id": 33,
+    "name": "slime"
+  },
+  {
+    "id": 34,
+    "name": "heart"
+  },
+  {
+    "id": 35,
+    "name": "barrier"
+  },
+  {
+    "id": 36,
+    "name": "iconcrack_"
+  },
+  {
+    "id": 37,
+    "name": "blockcrack_"
+  },
+  {
+    "id": 38,
+    "name": "blockdust_"
+  },
+  {
+    "id": 39,
+    "name": "droplet"
+  },
+  {
+    "id": 40,
+    "name": "take"
+  },
+  {
+    "id": 41,
+    "name": "mobappearance"
+  }
+]

mc/data/minecraft-data/pc/1.8/version.json

@@ -0,0 +1,5 @@
+{
+  "version":47,
+  "minecraftVersion":"1.8.8",
+  "majorVersion":"1.8"
+}

mc/data/minecraft-data/pc/1.8/windows.json

@@ -0,0 +1,229 @@
+[
+  {
+    "id": "",
+    "name": "Player",
+    "slots": [
+      {
+        "name": "craft result",
+        "index": 0
+      },
+      {
+        "name": "craft grid",
+        "index": 1,
+        "size": 4
+      },
+      {
+        "name": "armor",
+        "index": 5,
+        "size": 4
+      },
+      {
+        "name": "helmet",
+        "index": 5
+      },
+      {
+        "name": "chestplate",
+        "index": 6
+      },
+      {
+        "name": "leggings",
+        "index": 7
+      },
+      {
+        "name": "boots",
+        "index": 8
+      }
+    ]
+  },
+  {
+    "id": "EntityHorse",
+    "name": "Horse",
+    "slots": [
+      {
+        "name": "saddle",
+        "index": 0
+      },
+      {
+        "name": "armor",
+        "index": 1
+      },
+      {
+        "name": "storage",
+        "index": 2,
+        "size": 15
+      }
+    ],
+    "openedWith": [
+      {
+        "type": "entity",
+        "id": 100
+      }
+    ]
+  },
+  {
+    "id": "minecraft:anvil",
+    "name": "Anvil",
+    "slots": [
+      {
+        "name": "tool",
+        "index": 0
+      },
+      {
+        "name": "combined",
+        "index": 1
+      },
+      {
+        "name": "result",
+        "index": 2
+      }
+    ],
+    "properties": [
+      "repair cost"
+    ]
+  },
+  {
+    "id": "minecraft:beacon",
+    "name": "Beacon",
+    "slots": [
+      {
+        "name": "input",
+        "index": 0
+      }
+    ],
+    "properties": [
+      "level",
+      "effect 1",
+      "effect 2"
+    ],
+    "openedWith": [
+      {
+        "type": "block",
+        "id": 138
+      }
+    ]
+  },
+  {
+    "id": "minecraft:brewing_stand",
+    "name": "Brewing Stand",
+    "slots": [
+      {
+        "name": "ingredient",
+        "index": 3
+      },
+      {
+        "name": "result",
+        "index": 0,
+        "size": 3
+      }
+    ],
+    "properties": [
+      "brew time"
+    ],
+    "openedWith": [
+      {
+        "type": "block",
+        "id": 117
+      }
+    ]
+  },
+  {
+    "id": "minecraft:chest",
+    "name": "Chest"
+  },
+  {
+    "id": "minecraft:container",
+    "name": "Container"
+  },
+  {
+    "id": "minecraft:crafting_table",
+    "name": "Workbench",
+    "slots": [
+      {
+        "name": "craft result",
+        "index": 0
+      },
+      {
+        "name": "craft grid",
+        "index": 1,
+        "size": 9
+      }
+    ]
+  },
+  {
+    "id": "minecraft:dispenser",
+    "name": "Dispenser"
+  },
+  {
+    "id": "minecraft:dropper",
+    "name": "Dropper"
+  },
+  {
+    "id": "minecraft:enchanting_table",
+    "name": "Enchantment Table",
+    "slots": [
+      {
+        "name": "enchanted",
+        "index": 0
+      },
+      {
+        "name": "lapis",
+        "index": 1
+      }
+    ],
+    "properties": [
+      "xp 1",
+      "xp 2",
+      "xp 3",
+      "seed",
+      "tooltip 1",
+      "tooltip 2",
+      "tooltip 3"
+    ]
+  },
+  {
+    "id": "minecraft:furnace",
+    "name": "Furnace",
+    "slots": [
+      {
+        "name": "smelted",
+        "index": 0
+      },
+      {
+        "name": "fuel",
+        "index": 1
+      },
+      {
+        "name": "result",
+        "index": 2
+      }
+    ],
+    "properties": [
+      "fuel",
+      "fuel max",
+      "progress",
+      "progress max"
+    ]
+  },
+  {
+    "id": "minecraft:hopper",
+    "name": "Hopper"
+  },
+  {
+    "id": "minecraft:villager",
+    "name": "NPC Trade",
+    "slots": [
+      {
+        "name": "give 1",
+        "index": 0
+      },
+      {
+        "name": "give 2",
+        "index": 1
+      },
+      {
+        "name": "take",
+        "index": 2
+      }
+    ]
+  }
+]

mc/proto/connection.go

@@ -346,6 +346,7 @@ func (c *Conn) Receive() (packet proto_base.EncodeDecodeAble, err error) {
 	}
 	return
 }
+
 // NewConn creates a new Conn with default settings and a background context.
 func NewConn() (ret *Conn) {
 	return NewConnCtx(context.Background())

mc/proto_base/base_types.go

@@ -113,7 +113,7 @@ func (a Actor) ReceiveDirection() Direction {
 
 type (
 	// ToDo is a placeholder type for unimplemented packet fields.
-	ToDo       struct{}
+	ToDo struct{}
 	// RestBuffer represents the remaining unread bytes in a packet buffer.
 	RestBuffer []byte
 )

mc/proto_generator/main.go

@@ -429,7 +429,7 @@ func GenerateVersions(versions []string) (err error) {
 }
 
 func main() {
-	err := GenerateVersions([]string{"1.21.8", "1.21.9", "1.21.11", "26.1", "26.2"})
+	err := GenerateVersions([]string{"1.8", "1.21.8", "1.21.9", "1.21.11", "26.1", "26.2"})
 	if err != nil {
 		panic(err)
 	}

mc/proto_generator/native_compare_to.go

@@ -12,6 +12,10 @@ import (
 )
 
 func (g *Generator) ParseCompareTo(compareTo string) (e ast.Expr, cet CaseExprType, err error) {
+	if strings.HasPrefix(compareTo, "$") {
+		err = fmt.Errorf("parameterized type placeholder: %s", compareTo)
+		return
+	}
 	parts := strings.Split(compareTo, "/")
 	downPrefixCount := 0
 	for _, part := range parts {
@@ -124,6 +128,12 @@ func (g *Generator) RegisterCompareToNatives() {
 		"bitfield":  BitfieldCompareTo,
 		"u8":        ReturnInputCompareTo,
 		"i8":        ReturnInputCompareTo,
+		"i16":       ReturnInputCompareTo,
+		"i32":       ReturnInputCompareTo,
+		"i64":       ReturnInputCompareTo,
+		"u16":       ReturnInputCompareTo,
+		"u32":       ReturnInputCompareTo,
+		"string":    ReturnInputCompareTo,
 		"bitflags":  BitflagsCompareTo,
 		"switch":    ReturnInputCompareTo,
 		"varlong":   ReturnInputCompareTo,

mc/proto_generator/native_decoder.go

@@ -634,6 +634,8 @@ func (g *Generator) RegisterDecoderNatives() {
 		"varlong":         VarLongDecoder,
 		"anonymousNbt":    DefaultDecoder,
 		"anonOptionalNbt": DefaultDecoder, // I have no idea what the difference is between these two
+		"optionalNbt":     DefaultDecoder,
+		"nbt":             DefaultDecoder,
 		"lpVec3":          DefaultDecoder,
 		"UUID":            UUIDDecoder,
 		"restBuffer":      DefaultDecoder,

mc/proto_generator/native_encoder.go

@@ -11,15 +11,16 @@ import (
 	"github.com/go-viper/mapstructure/v2"
 )
 
-func DefaultEncoder(_ *Generator, varToSet ast.Expr, _ any, _ string) (s []ast.Stmt, err error) {
+func DefaultEncoder(_ *Generator, varToSet ast.Expr, _ any, name string) (s []ast.Stmt, err error) {
+	tmpName := name + "EncTmp"
 	s = Stmts(
+		Define121(Ident(tmpName), varToSet),
 		Assign121(
 			Ident("err"),
-			Call(SelectorExprAndStr(varToSet, "Encode"), Ident("w")),
+			Call(SelectorExprAndStr(Ident(tmpName), "Encode"), Ident("w")),
 		),
 		IfErrNil(),
 	)
-
 	return
 }
 
@@ -402,6 +403,8 @@ func (g *Generator) RegisterEncoderNatives() {
 		"varlong":         VarLongEncoder,
 		"anonymousNbt":    DefaultEncoder,
 		"anonOptionalNbt": DefaultEncoder, // I have no idea what the difference is between these two
+		"optionalNbt":     DefaultEncoder,
+		"nbt":             DefaultEncoder,
 		"UUID":            UUIDEncoder,
 		"restBuffer":      DefaultEncoder,
 		"lpVec3":          DefaultEncoder,

mc/proto_generator/native_type.go

@@ -200,6 +200,8 @@ func (g *Generator) RegisterNatives() {
 		"native":                   VisitDontGenerateType,
 		"anonymousNbt":             MakeSelectorVisitor("nbt", "Anon"),
 		"anonOptionalNbt":          MakeSelectorVisitor("nbt", "Anon"), // I have no idea what the difference is between these two
+		"optionalNbt":              MakeSelectorVisitor("nbt", "Tag"),
+		"nbt":                      MakeSelectorVisitor("nbt", "Tag"),
 		"void":                     VoidType,
 		"bool":                     MakeIdentVisitor("bool"),
 		"u8":                       MakeIdentVisitor("uint8"),

mc/server/config_server.go

@@ -27,13 +27,15 @@ func ServeConfig(c *proto.Conn) (err error) {
 	}
 	cs.registryData = n.Value.(map[string]any)
 	packet := &v1_21_8.ConfigurationToClientPacketCommonSelectKnownPacks{}
-	for _, pAny := range cs.registryData["KnownPacks"].([]any) {
+	if knownPacks, ok := cs.registryData["KnownPacks"]; ok {
-		p := pAny.(map[string]any)
+		for _, pAny := range knownPacks.([]any) {
-		packet.Packs = append(packet.Packs, struct {
+			p := pAny.(map[string]any)
-			Namespace string
+			packet.Packs = append(packet.Packs, struct {
-			Id        string
+				Namespace string
-			Version   string
+				Id        string
-		}{p["Namespace"].(string), p["Id"].(string), p["Version"].(string)})
+				Version   string
+			}{p["Namespace"].(string), p["Id"].(string), p["Version"].(string)})
+		}
 	}
 	err = c.Send(packet)
 	if err != nil {