fix: implement IDSet (registryEntryHolderSet) decoder/encoder

- Replace old broken RegistryEntryHolderSetDecoder with correct varint
  discriminator: id != 0 returns raw ID, id == 0 decodes string base
- Add RegistryEntryHolderSetEncoder using type switch (string/int32)
- Add NonErroringIndex to proto_base (zero-fallback index lookup)
- DeclareRecipes now fails with index not found (mapper) instead of to do

mc/proto_generated/v1_12_2/proto.go

@@ -1,6 +1,6 @@
 // Code generated by strom. DO NOT EDIT.
 // source: minecraft-data/pc/1.12.2/protocol.json (sha256:21c57208db654a5e14a34cb696570080df179c5c642e53b16120399eee9232be)
-// version: v0.6.6-0.20260805170503-1d8f70c7fdae+dirty (go1.26.2)
+// version: v0.6.6-0.20260805173638-56ac8e154ea1+dirty (go1.26.2)
 package v1_12_2
 
 import (

mc/proto_generated/v1_14_4/proto.go

@@ -1,6 +1,6 @@
 // Code generated by strom. DO NOT EDIT.
 // source: minecraft-data/pc/1.14.4/protocol.json (sha256:b6edff5abaaf234037b5019024d749e27e746250a23253bb4ad77d8f76e93167)
-// version: v0.6.6-0.20260805170503-1d8f70c7fdae+dirty (go1.26.2)
+// version: v0.6.6-0.20260805173638-56ac8e154ea1+dirty (go1.26.2)
 package v1_14_4
 
 import (

mc/proto_generated/v1_16_5/proto.go

@@ -1,6 +1,6 @@
 // Code generated by strom. DO NOT EDIT.
 // source: minecraft-data/pc/1.16.2/protocol.json (sha256:d96a3c5a7a7ddf2105e23990c2471b3aeafe4a6975e0c9d7d7943b599af9dfb3)
-// version: v0.6.6-0.20260805170503-1d8f70c7fdae+dirty (go1.26.2)
+// version: v0.6.6-0.20260805173638-56ac8e154ea1+dirty (go1.26.2)
 package v1_16_5
 
 import (

mc/proto_generated/v1_21_11/proto.go

@@ -1,6 +1,6 @@
 // Code generated by strom. DO NOT EDIT.
 // source: minecraft-data/pc/1.21.11/protocol.json (sha256:97d2726cce3a39cc967a954f27f4ebf029ec3f0f655bb21942aab8745d13cdab)
-// version: v0.6.6-0.20260805170503-1d8f70c7fdae+dirty (go1.26.2)
+// version: v0.6.6-0.20260805173638-56ac8e154ea1+dirty (go1.26.2)
 package v1_21_11
 
 import (
@@ -901,11 +901,42 @@ type IDSet struct {
 }
 
 func (ret *IDSet) Decode(r io.ReadSeeker) (err error) {
-	err = proto_base.ToDoError
+	var IDSetId int32
+	IDSetId, err = proto_base.DecodeVarInt(r)
+	if err != nil {
+		return
+	}
+	if IDSetId != 0 {
+		ret.Val = IDSetId
+	} else {
+		var IDSetResult string
+		IDSetResult, err = proto_base.DecodeString(r)
+		if err != nil {
+			return
+		}
+		ret.Val = IDSetResult
+	}
 	return
 }
 func (ret *IDSet) Encode(w io.Writer) (err error) {
-	err = proto_base.ToDoError
+	switch IDSetKnownType := ret.Val.(type) {
+	case string:
+		err = proto_base.EncodeVarInt(w, 0)
+		if err != nil {
+			return
+		}
+		err = proto_base.EncodeString(w, IDSetKnownType)
+		if err != nil {
+			return
+		}
+	case int32:
+		err = proto_base.EncodeVarInt(w, IDSetKnownType)
+		if err != nil {
+			return
+		}
+	default:
+		err = proto_base.BadTypeError
+	}
 	return
 }
 
@@ -965,11 +996,115 @@ type ItemBlockPredicate struct {
 }
 
 func (ret *ItemBlockPredicate) Decode(r io.ReadSeeker) (err error) {
-	err = proto_base.ToDoError
+	var ItemBlockPredicateBlockSetPresent bool
+	err = binary.Read(r, binary.BigEndian, &ItemBlockPredicateBlockSetPresent)
+	if err != nil {
+		return
+	}
+	if ItemBlockPredicateBlockSetPresent {
+		var ItemBlockPredicateBlockSetPresentValue any
+		var ItemBlockPredicateBlockSetId int32
+		ItemBlockPredicateBlockSetId, err = proto_base.DecodeVarInt(r)
+		if err != nil {
+			return
+		}
+		if ItemBlockPredicateBlockSetId != 0 {
+			ItemBlockPredicateBlockSetPresentValue = ItemBlockPredicateBlockSetId
+		} else {
+			var ItemBlockPredicateBlockSetResult string
+			ItemBlockPredicateBlockSetResult, err = proto_base.DecodeString(r)
+			if err != nil {
+				return
+			}
+			ItemBlockPredicateBlockSetPresentValue = ItemBlockPredicateBlockSetResult
+		}
+		ret.BlockSet = &ItemBlockPredicateBlockSetPresentValue
+	}
+	var ItemBlockPredicatePropertiesPresent bool
+	err = binary.Read(r, binary.BigEndian, &ItemBlockPredicatePropertiesPresent)
+	if err != nil {
+		return
+	}
+	if ItemBlockPredicatePropertiesPresent {
+		var ItemBlockPredicatePropertiesPresentValue []ItemBlockProperty
+		var lItemBlockPredicateProperties int32
+		lItemBlockPredicateProperties, err = proto_base.DecodeVarInt(r)
+		if err != nil {
+			return
+		}
+		ItemBlockPredicatePropertiesPresentValue = []ItemBlockProperty{}
+		for range lItemBlockPredicateProperties {
+			var ItemBlockPredicatePropertiesElement ItemBlockProperty
+			err = ItemBlockPredicatePropertiesElement.Decode(r)
+			if err != nil {
+				return
+			}
+			ItemBlockPredicatePropertiesPresentValue = append(ItemBlockPredicatePropertiesPresentValue, ItemBlockPredicatePropertiesElement)
+		}
+		ret.Properties = &ItemBlockPredicatePropertiesPresentValue
+	}
+	err = ret.Nbt.Decode(r)
+	if err != nil {
+		return
+	}
+	err = ret.Components.Decode(r)
+	if err != nil {
+		return
+	}
 	return
 }
 func (ret *ItemBlockPredicate) Encode(w io.Writer) (err error) {
-	err = proto_base.ToDoError
+	err = binary.Write(w, binary.BigEndian, ret.BlockSet != nil)
+	if err != nil {
+		return
+	}
+	if ret.BlockSet != nil {
+		switch ItemBlockPredicateBlockSetKnownType := (*ret.BlockSet).(type) {
+		case string:
+			err = proto_base.EncodeVarInt(w, 0)
+			if err != nil {
+				return
+			}
+			err = proto_base.EncodeString(w, ItemBlockPredicateBlockSetKnownType)
+			if err != nil {
+				return
+			}
+		case int32:
+			err = proto_base.EncodeVarInt(w, ItemBlockPredicateBlockSetKnownType)
+			if err != nil {
+				return
+			}
+		default:
+			err = proto_base.BadTypeError
+		}
+	}
+	err = binary.Write(w, binary.BigEndian, ret.Properties != nil)
+	if err != nil {
+		return
+	}
+	if ret.Properties != nil {
+		err = proto_base.EncodeVarInt(w, int32(len(*ret.Properties)))
+		if err != nil {
+			return
+		}
+		for iItemBlockPredicateProperties := range len(*ret.Properties) {
+			ItemBlockPredicatePropertiesInnerEncTmp := (*ret.Properties)[iItemBlockPredicateProperties]
+			err = ItemBlockPredicatePropertiesInnerEncTmp.Encode(w)
+			if err != nil {
+				return
+			}
+		}
+	}
+	ItemBlockPredicateNbtEncTmp := ret.Nbt
+	err = ItemBlockPredicateNbtEncTmp.Encode(w)
+	if err != nil {
+		return
+	}
+	ItemBlockPredicateComponentsEncTmp := ret.Components
+	err = ItemBlockPredicateComponentsEncTmp.Encode(w)
+	if err != nil {
+		return
+	}
 	return
 }
 

mc/proto_generated/v1_21_8/proto.go

@@ -1,6 +1,6 @@
 // Code generated by strom. DO NOT EDIT.
 // source: minecraft-data/pc/1.21.8/protocol.json (sha256:930fbb4c69fd2ecadddcee3c38d3f02908adc23b54b707cb21112e7ab1e9dba1)
-// version: v0.6.6-0.20260805170503-1d8f70c7fdae+dirty (go1.26.2)
+// version: v0.6.6-0.20260805173638-56ac8e154ea1+dirty (go1.26.2)
 package v1_21_8
 
 import (
@@ -525,11 +525,42 @@ type IDSet struct {
 }
 
 func (ret *IDSet) Decode(r io.ReadSeeker) (err error) {
-	err = proto_base.ToDoError
+	var IDSetId int32
+	IDSetId, err = proto_base.DecodeVarInt(r)
+	if err != nil {
+		return
+	}
+	if IDSetId != 0 {
+		ret.Val = IDSetId
+	} else {
+		var IDSetResult string
+		IDSetResult, err = proto_base.DecodeString(r)
+		if err != nil {
+			return
+		}
+		ret.Val = IDSetResult
+	}
 	return
 }
 func (ret *IDSet) Encode(w io.Writer) (err error) {
-	err = proto_base.ToDoError
+	switch IDSetKnownType := ret.Val.(type) {
+	case string:
+		err = proto_base.EncodeVarInt(w, 0)
+		if err != nil {
+			return
+		}
+		err = proto_base.EncodeString(w, IDSetKnownType)
+		if err != nil {
+			return
+		}
+	case int32:
+		err = proto_base.EncodeVarInt(w, IDSetKnownType)
+		if err != nil {
+			return
+		}
+	default:
+		err = proto_base.BadTypeError
+	}
 	return
 }
 
@@ -589,11 +620,115 @@ type ItemBlockPredicate struct {
 }
 
 func (ret *ItemBlockPredicate) Decode(r io.ReadSeeker) (err error) {
-	err = proto_base.ToDoError
+	var ItemBlockPredicateBlockSetPresent bool
+	err = binary.Read(r, binary.BigEndian, &ItemBlockPredicateBlockSetPresent)
+	if err != nil {
+		return
+	}
+	if ItemBlockPredicateBlockSetPresent {
+		var ItemBlockPredicateBlockSetPresentValue any
+		var ItemBlockPredicateBlockSetId int32
+		ItemBlockPredicateBlockSetId, err = proto_base.DecodeVarInt(r)
+		if err != nil {
+			return
+		}
+		if ItemBlockPredicateBlockSetId != 0 {
+			ItemBlockPredicateBlockSetPresentValue = ItemBlockPredicateBlockSetId
+		} else {
+			var ItemBlockPredicateBlockSetResult string
+			ItemBlockPredicateBlockSetResult, err = proto_base.DecodeString(r)
+			if err != nil {
+				return
+			}
+			ItemBlockPredicateBlockSetPresentValue = ItemBlockPredicateBlockSetResult
+		}
+		ret.BlockSet = &ItemBlockPredicateBlockSetPresentValue
+	}
+	var ItemBlockPredicatePropertiesPresent bool
+	err = binary.Read(r, binary.BigEndian, &ItemBlockPredicatePropertiesPresent)
+	if err != nil {
+		return
+	}
+	if ItemBlockPredicatePropertiesPresent {
+		var ItemBlockPredicatePropertiesPresentValue []ItemBlockProperty
+		var lItemBlockPredicateProperties int32
+		lItemBlockPredicateProperties, err = proto_base.DecodeVarInt(r)
+		if err != nil {
+			return
+		}
+		ItemBlockPredicatePropertiesPresentValue = []ItemBlockProperty{}
+		for range lItemBlockPredicateProperties {
+			var ItemBlockPredicatePropertiesElement ItemBlockProperty
+			err = ItemBlockPredicatePropertiesElement.Decode(r)
+			if err != nil {
+				return
+			}
+			ItemBlockPredicatePropertiesPresentValue = append(ItemBlockPredicatePropertiesPresentValue, ItemBlockPredicatePropertiesElement)
+		}
+		ret.Properties = &ItemBlockPredicatePropertiesPresentValue
+	}
+	err = ret.Nbt.Decode(r)
+	if err != nil {
+		return
+	}
+	err = ret.Components.Decode(r)
+	if err != nil {
+		return
+	}
 	return
 }
 func (ret *ItemBlockPredicate) Encode(w io.Writer) (err error) {
-	err = proto_base.ToDoError
+	err = binary.Write(w, binary.BigEndian, ret.BlockSet != nil)
+	if err != nil {
+		return
+	}
+	if ret.BlockSet != nil {
+		switch ItemBlockPredicateBlockSetKnownType := (*ret.BlockSet).(type) {
+		case string:
+			err = proto_base.EncodeVarInt(w, 0)
+			if err != nil {
+				return
+			}
+			err = proto_base.EncodeString(w, ItemBlockPredicateBlockSetKnownType)
+			if err != nil {
+				return
+			}
+		case int32:
+			err = proto_base.EncodeVarInt(w, ItemBlockPredicateBlockSetKnownType)
+			if err != nil {
+				return
+			}
+		default:
+			err = proto_base.BadTypeError
+		}
+	}
+	err = binary.Write(w, binary.BigEndian, ret.Properties != nil)
+	if err != nil {
+		return
+	}
+	if ret.Properties != nil {
+		err = proto_base.EncodeVarInt(w, int32(len(*ret.Properties)))
+		if err != nil {
+			return
+		}
+		for iItemBlockPredicateProperties := range len(*ret.Properties) {
+			ItemBlockPredicatePropertiesInnerEncTmp := (*ret.Properties)[iItemBlockPredicateProperties]
+			err = ItemBlockPredicatePropertiesInnerEncTmp.Encode(w)
+			if err != nil {
+				return
+			}
+		}
+	}
+	ItemBlockPredicateNbtEncTmp := ret.Nbt
+	err = ItemBlockPredicateNbtEncTmp.Encode(w)
+	if err != nil {
+		return
+	}
+	ItemBlockPredicateComponentsEncTmp := ret.Components
+	err = ItemBlockPredicateComponentsEncTmp.Encode(w)
+	if err != nil {
+		return
+	}
 	return
 }
 

mc/proto_generated/v1_21_9/proto.go

@@ -1,6 +1,6 @@
 // Code generated by strom. DO NOT EDIT.
 // source: minecraft-data/pc/1.21.9/protocol.json (sha256:9861cee397931c678c3b1837dcdf82e3fc885442c6bd0e4a60522fbf26653e59)
-// version: v0.6.6-0.20260805170503-1d8f70c7fdae+dirty (go1.26.2)
+// version: v0.6.6-0.20260805173638-56ac8e154ea1+dirty (go1.26.2)
 package v1_21_9
 
 import (
@@ -807,11 +807,42 @@ type IDSet struct {
 }
 
 func (ret *IDSet) Decode(r io.ReadSeeker) (err error) {
-	err = proto_base.ToDoError
+	var IDSetId int32
+	IDSetId, err = proto_base.DecodeVarInt(r)
+	if err != nil {
+		return
+	}
+	if IDSetId != 0 {
+		ret.Val = IDSetId
+	} else {
+		var IDSetResult string
+		IDSetResult, err = proto_base.DecodeString(r)
+		if err != nil {
+			return
+		}
+		ret.Val = IDSetResult
+	}
 	return
 }
 func (ret *IDSet) Encode(w io.Writer) (err error) {
-	err = proto_base.ToDoError
+	switch IDSetKnownType := ret.Val.(type) {
+	case string:
+		err = proto_base.EncodeVarInt(w, 0)
+		if err != nil {
+			return
+		}
+		err = proto_base.EncodeString(w, IDSetKnownType)
+		if err != nil {
+			return
+		}
+	case int32:
+		err = proto_base.EncodeVarInt(w, IDSetKnownType)
+		if err != nil {
+			return
+		}
+	default:
+		err = proto_base.BadTypeError
+	}
 	return
 }
 
@@ -871,11 +902,115 @@ type ItemBlockPredicate struct {
 }
 
 func (ret *ItemBlockPredicate) Decode(r io.ReadSeeker) (err error) {
-	err = proto_base.ToDoError
+	var ItemBlockPredicateBlockSetPresent bool
+	err = binary.Read(r, binary.BigEndian, &ItemBlockPredicateBlockSetPresent)
+	if err != nil {
+		return
+	}
+	if ItemBlockPredicateBlockSetPresent {
+		var ItemBlockPredicateBlockSetPresentValue any
+		var ItemBlockPredicateBlockSetId int32
+		ItemBlockPredicateBlockSetId, err = proto_base.DecodeVarInt(r)
+		if err != nil {
+			return
+		}
+		if ItemBlockPredicateBlockSetId != 0 {
+			ItemBlockPredicateBlockSetPresentValue = ItemBlockPredicateBlockSetId
+		} else {
+			var ItemBlockPredicateBlockSetResult string
+			ItemBlockPredicateBlockSetResult, err = proto_base.DecodeString(r)
+			if err != nil {
+				return
+			}
+			ItemBlockPredicateBlockSetPresentValue = ItemBlockPredicateBlockSetResult
+		}
+		ret.BlockSet = &ItemBlockPredicateBlockSetPresentValue
+	}
+	var ItemBlockPredicatePropertiesPresent bool
+	err = binary.Read(r, binary.BigEndian, &ItemBlockPredicatePropertiesPresent)
+	if err != nil {
+		return
+	}
+	if ItemBlockPredicatePropertiesPresent {
+		var ItemBlockPredicatePropertiesPresentValue []ItemBlockProperty
+		var lItemBlockPredicateProperties int32
+		lItemBlockPredicateProperties, err = proto_base.DecodeVarInt(r)
+		if err != nil {
+			return
+		}
+		ItemBlockPredicatePropertiesPresentValue = []ItemBlockProperty{}
+		for range lItemBlockPredicateProperties {
+			var ItemBlockPredicatePropertiesElement ItemBlockProperty
+			err = ItemBlockPredicatePropertiesElement.Decode(r)
+			if err != nil {
+				return
+			}
+			ItemBlockPredicatePropertiesPresentValue = append(ItemBlockPredicatePropertiesPresentValue, ItemBlockPredicatePropertiesElement)
+		}
+		ret.Properties = &ItemBlockPredicatePropertiesPresentValue
+	}
+	err = ret.Nbt.Decode(r)
+	if err != nil {
+		return
+	}
+	err = ret.Components.Decode(r)
+	if err != nil {
+		return
+	}
 	return
 }
 func (ret *ItemBlockPredicate) Encode(w io.Writer) (err error) {
-	err = proto_base.ToDoError
+	err = binary.Write(w, binary.BigEndian, ret.BlockSet != nil)
+	if err != nil {
+		return
+	}
+	if ret.BlockSet != nil {
+		switch ItemBlockPredicateBlockSetKnownType := (*ret.BlockSet).(type) {
+		case string:
+			err = proto_base.EncodeVarInt(w, 0)
+			if err != nil {
+				return
+			}
+			err = proto_base.EncodeString(w, ItemBlockPredicateBlockSetKnownType)
+			if err != nil {
+				return
+			}
+		case int32:
+			err = proto_base.EncodeVarInt(w, ItemBlockPredicateBlockSetKnownType)
+			if err != nil {
+				return
+			}
+		default:
+			err = proto_base.BadTypeError
+		}
+	}
+	err = binary.Write(w, binary.BigEndian, ret.Properties != nil)
+	if err != nil {
+		return
+	}
+	if ret.Properties != nil {
+		err = proto_base.EncodeVarInt(w, int32(len(*ret.Properties)))
+		if err != nil {
+			return
+		}
+		for iItemBlockPredicateProperties := range len(*ret.Properties) {
+			ItemBlockPredicatePropertiesInnerEncTmp := (*ret.Properties)[iItemBlockPredicateProperties]
+			err = ItemBlockPredicatePropertiesInnerEncTmp.Encode(w)
+			if err != nil {
+				return
+			}
+		}
+	}
+	ItemBlockPredicateNbtEncTmp := ret.Nbt
+	err = ItemBlockPredicateNbtEncTmp.Encode(w)
+	if err != nil {
+		return
+	}
+	ItemBlockPredicateComponentsEncTmp := ret.Components
+	err = ItemBlockPredicateComponentsEncTmp.Encode(w)
+	if err != nil {
+		return
+	}
 	return
 }
 

mc/proto_generated/v1_8/proto.go

@@ -1,6 +1,6 @@
 // Code generated by strom. DO NOT EDIT.
 // source: minecraft-data/pc/1.8/protocol.json (sha256:79fe774bfc255dd281899c004fbb9c7adc40fb107de9353da1dd0371ea4b53af)
-// version: v0.6.6-0.20260805170503-1d8f70c7fdae+dirty (go1.26.2)
+// version: v0.6.6-0.20260805173638-56ac8e154ea1+dirty (go1.26.2)
 package v1_8
 
 import (

mc/proto_generated/v26_1/proto.go

@@ -1,6 +1,6 @@
 // Code generated by strom. DO NOT EDIT.
 // source: minecraft-data/pc/26.1/protocol.json (sha256:dfb6318886cd3ceab617f75ac05e24f9836a64501d60551071289b904ebfc389)
-// version: v0.6.6-0.20260805170503-1d8f70c7fdae+dirty (go1.26.2)
+// version: v0.6.6-0.20260805173638-56ac8e154ea1+dirty (go1.26.2)
 package v26_1
 
 import (
@@ -901,11 +901,42 @@ type IDSet struct {
 }
 
 func (ret *IDSet) Decode(r io.ReadSeeker) (err error) {
-	err = proto_base.ToDoError
+	var IDSetId int32
+	IDSetId, err = proto_base.DecodeVarInt(r)
+	if err != nil {
+		return
+	}
+	if IDSetId != 0 {
+		ret.Val = IDSetId
+	} else {
+		var IDSetResult string
+		IDSetResult, err = proto_base.DecodeString(r)
+		if err != nil {
+			return
+		}
+		ret.Val = IDSetResult
+	}
 	return
 }
 func (ret *IDSet) Encode(w io.Writer) (err error) {
-	err = proto_base.ToDoError
+	switch IDSetKnownType := ret.Val.(type) {
+	case string:
+		err = proto_base.EncodeVarInt(w, 0)
+		if err != nil {
+			return
+		}
+		err = proto_base.EncodeString(w, IDSetKnownType)
+		if err != nil {
+			return
+		}
+	case int32:
+		err = proto_base.EncodeVarInt(w, IDSetKnownType)
+		if err != nil {
+			return
+		}
+	default:
+		err = proto_base.BadTypeError
+	}
 	return
 }
 
@@ -965,11 +996,115 @@ type ItemBlockPredicate struct {
 }
 
 func (ret *ItemBlockPredicate) Decode(r io.ReadSeeker) (err error) {
-	err = proto_base.ToDoError
+	var ItemBlockPredicateBlockSetPresent bool
+	err = binary.Read(r, binary.BigEndian, &ItemBlockPredicateBlockSetPresent)
+	if err != nil {
+		return
+	}
+	if ItemBlockPredicateBlockSetPresent {
+		var ItemBlockPredicateBlockSetPresentValue any
+		var ItemBlockPredicateBlockSetId int32
+		ItemBlockPredicateBlockSetId, err = proto_base.DecodeVarInt(r)
+		if err != nil {
+			return
+		}
+		if ItemBlockPredicateBlockSetId != 0 {
+			ItemBlockPredicateBlockSetPresentValue = ItemBlockPredicateBlockSetId
+		} else {
+			var ItemBlockPredicateBlockSetResult string
+			ItemBlockPredicateBlockSetResult, err = proto_base.DecodeString(r)
+			if err != nil {
+				return
+			}
+			ItemBlockPredicateBlockSetPresentValue = ItemBlockPredicateBlockSetResult
+		}
+		ret.BlockSet = &ItemBlockPredicateBlockSetPresentValue
+	}
+	var ItemBlockPredicatePropertiesPresent bool
+	err = binary.Read(r, binary.BigEndian, &ItemBlockPredicatePropertiesPresent)
+	if err != nil {
+		return
+	}
+	if ItemBlockPredicatePropertiesPresent {
+		var ItemBlockPredicatePropertiesPresentValue []ItemBlockProperty
+		var lItemBlockPredicateProperties int32
+		lItemBlockPredicateProperties, err = proto_base.DecodeVarInt(r)
+		if err != nil {
+			return
+		}
+		ItemBlockPredicatePropertiesPresentValue = []ItemBlockProperty{}
+		for range lItemBlockPredicateProperties {
+			var ItemBlockPredicatePropertiesElement ItemBlockProperty
+			err = ItemBlockPredicatePropertiesElement.Decode(r)
+			if err != nil {
+				return
+			}
+			ItemBlockPredicatePropertiesPresentValue = append(ItemBlockPredicatePropertiesPresentValue, ItemBlockPredicatePropertiesElement)
+		}
+		ret.Properties = &ItemBlockPredicatePropertiesPresentValue
+	}
+	err = ret.Nbt.Decode(r)
+	if err != nil {
+		return
+	}
+	err = ret.Components.Decode(r)
+	if err != nil {
+		return
+	}
 	return
 }
 func (ret *ItemBlockPredicate) Encode(w io.Writer) (err error) {
-	err = proto_base.ToDoError
+	err = binary.Write(w, binary.BigEndian, ret.BlockSet != nil)
+	if err != nil {
+		return
+	}
+	if ret.BlockSet != nil {
+		switch ItemBlockPredicateBlockSetKnownType := (*ret.BlockSet).(type) {
+		case string:
+			err = proto_base.EncodeVarInt(w, 0)
+			if err != nil {
+				return
+			}
+			err = proto_base.EncodeString(w, ItemBlockPredicateBlockSetKnownType)
+			if err != nil {
+				return
+			}
+		case int32:
+			err = proto_base.EncodeVarInt(w, ItemBlockPredicateBlockSetKnownType)
+			if err != nil {
+				return
+			}
+		default:
+			err = proto_base.BadTypeError
+		}
+	}
+	err = binary.Write(w, binary.BigEndian, ret.Properties != nil)
+	if err != nil {
+		return
+	}
+	if ret.Properties != nil {
+		err = proto_base.EncodeVarInt(w, int32(len(*ret.Properties)))
+		if err != nil {
+			return
+		}
+		for iItemBlockPredicateProperties := range len(*ret.Properties) {
+			ItemBlockPredicatePropertiesInnerEncTmp := (*ret.Properties)[iItemBlockPredicateProperties]
+			err = ItemBlockPredicatePropertiesInnerEncTmp.Encode(w)
+			if err != nil {
+				return
+			}
+		}
+	}
+	ItemBlockPredicateNbtEncTmp := ret.Nbt
+	err = ItemBlockPredicateNbtEncTmp.Encode(w)
+	if err != nil {
+		return
+	}
+	ItemBlockPredicateComponentsEncTmp := ret.Components
+	err = ItemBlockPredicateComponentsEncTmp.Encode(w)
+	if err != nil {
+		return
+	}
 	return
 }
 

mc/proto_generated/v26_2/proto.go

@@ -1,6 +1,6 @@
 // Code generated by strom. DO NOT EDIT.
 // source: minecraft-data/pc/26.2/protocol.json (sha256:7ba66411adcc68a668f38211e1b00eeb386a345d5eb16fadd6dc1c7f94bb175f)
-// version: v0.6.6-0.20260805170503-1d8f70c7fdae+dirty (go1.26.2)
+// version: v0.6.6-0.20260805173638-56ac8e154ea1+dirty (go1.26.2)
 package v26_2
 
 import (
@@ -901,11 +901,42 @@ type IDSet struct {
 }
 
 func (ret *IDSet) Decode(r io.ReadSeeker) (err error) {
-	err = proto_base.ToDoError
+	var IDSetId int32
+	IDSetId, err = proto_base.DecodeVarInt(r)
+	if err != nil {
+		return
+	}
+	if IDSetId != 0 {
+		ret.Val = IDSetId
+	} else {
+		var IDSetResult string
+		IDSetResult, err = proto_base.DecodeString(r)
+		if err != nil {
+			return
+		}
+		ret.Val = IDSetResult
+	}
 	return
 }
 func (ret *IDSet) Encode(w io.Writer) (err error) {
-	err = proto_base.ToDoError
+	switch IDSetKnownType := ret.Val.(type) {
+	case string:
+		err = proto_base.EncodeVarInt(w, 0)
+		if err != nil {
+			return
+		}
+		err = proto_base.EncodeString(w, IDSetKnownType)
+		if err != nil {
+			return
+		}
+	case int32:
+		err = proto_base.EncodeVarInt(w, IDSetKnownType)
+		if err != nil {
+			return
+		}
+	default:
+		err = proto_base.BadTypeError
+	}
 	return
 }
 
@@ -965,11 +996,115 @@ type ItemBlockPredicate struct {
 }
 
 func (ret *ItemBlockPredicate) Decode(r io.ReadSeeker) (err error) {
-	err = proto_base.ToDoError
+	var ItemBlockPredicateBlockSetPresent bool
+	err = binary.Read(r, binary.BigEndian, &ItemBlockPredicateBlockSetPresent)
+	if err != nil {
+		return
+	}
+	if ItemBlockPredicateBlockSetPresent {
+		var ItemBlockPredicateBlockSetPresentValue any
+		var ItemBlockPredicateBlockSetId int32
+		ItemBlockPredicateBlockSetId, err = proto_base.DecodeVarInt(r)
+		if err != nil {
+			return
+		}
+		if ItemBlockPredicateBlockSetId != 0 {
+			ItemBlockPredicateBlockSetPresentValue = ItemBlockPredicateBlockSetId
+		} else {
+			var ItemBlockPredicateBlockSetResult string
+			ItemBlockPredicateBlockSetResult, err = proto_base.DecodeString(r)
+			if err != nil {
+				return
+			}
+			ItemBlockPredicateBlockSetPresentValue = ItemBlockPredicateBlockSetResult
+		}
+		ret.BlockSet = &ItemBlockPredicateBlockSetPresentValue
+	}
+	var ItemBlockPredicatePropertiesPresent bool
+	err = binary.Read(r, binary.BigEndian, &ItemBlockPredicatePropertiesPresent)
+	if err != nil {
+		return
+	}
+	if ItemBlockPredicatePropertiesPresent {
+		var ItemBlockPredicatePropertiesPresentValue []ItemBlockProperty
+		var lItemBlockPredicateProperties int32
+		lItemBlockPredicateProperties, err = proto_base.DecodeVarInt(r)
+		if err != nil {
+			return
+		}
+		ItemBlockPredicatePropertiesPresentValue = []ItemBlockProperty{}
+		for range lItemBlockPredicateProperties {
+			var ItemBlockPredicatePropertiesElement ItemBlockProperty
+			err = ItemBlockPredicatePropertiesElement.Decode(r)
+			if err != nil {
+				return
+			}
+			ItemBlockPredicatePropertiesPresentValue = append(ItemBlockPredicatePropertiesPresentValue, ItemBlockPredicatePropertiesElement)
+		}
+		ret.Properties = &ItemBlockPredicatePropertiesPresentValue
+	}
+	err = ret.Nbt.Decode(r)
+	if err != nil {
+		return
+	}
+	err = ret.Components.Decode(r)
+	if err != nil {
+		return
+	}
 	return
 }
 func (ret *ItemBlockPredicate) Encode(w io.Writer) (err error) {
-	err = proto_base.ToDoError
+	err = binary.Write(w, binary.BigEndian, ret.BlockSet != nil)
+	if err != nil {
+		return
+	}
+	if ret.BlockSet != nil {
+		switch ItemBlockPredicateBlockSetKnownType := (*ret.BlockSet).(type) {
+		case string:
+			err = proto_base.EncodeVarInt(w, 0)
+			if err != nil {
+				return
+			}
+			err = proto_base.EncodeString(w, ItemBlockPredicateBlockSetKnownType)
+			if err != nil {
+				return
+			}
+		case int32:
+			err = proto_base.EncodeVarInt(w, ItemBlockPredicateBlockSetKnownType)
+			if err != nil {
+				return
+			}
+		default:
+			err = proto_base.BadTypeError
+		}
+	}
+	err = binary.Write(w, binary.BigEndian, ret.Properties != nil)
+	if err != nil {
+		return
+	}
+	if ret.Properties != nil {
+		err = proto_base.EncodeVarInt(w, int32(len(*ret.Properties)))
+		if err != nil {
+			return
+		}
+		for iItemBlockPredicateProperties := range len(*ret.Properties) {
+			ItemBlockPredicatePropertiesInnerEncTmp := (*ret.Properties)[iItemBlockPredicateProperties]
+			err = ItemBlockPredicatePropertiesInnerEncTmp.Encode(w)
+			if err != nil {
+				return
+			}
+		}
+	}
+	ItemBlockPredicateNbtEncTmp := ret.Nbt
+	err = ItemBlockPredicateNbtEncTmp.Encode(w)
+	if err != nil {
+		return
+	}
+	ItemBlockPredicateComponentsEncTmp := ret.Components
+	err = ItemBlockPredicateComponentsEncTmp.Encode(w)
+	if err != nil {
+		return
+	}
 	return
 }