remove outdated SDKs

9 files changed, 0 insertions, 2257 deletions

diff --git a/packages/sdk/go/internal/apijson/decoder.go b/packages/sdk/go/internal/apijson/decoder.go
deleted file mode 100644
index bf01bf6b4..000000000
--- a/packages/sdk/go/internal/apijson/decoder.go
+++ /dev/null
@@ -1,670 +0,0 @@
-package apijson
-
-import (
-	"encoding/json"
-	"errors"
-	"fmt"
-	"reflect"
-	"strconv"
-	"sync"
-	"time"
-	"unsafe"
-
-	"github.com/tidwall/gjson"
-)
-
-// decoders is a synchronized map with roughly the following type:
-// map[reflect.Type]decoderFunc
-var decoders sync.Map
-
-// Unmarshal is similar to [encoding/json.Unmarshal] and parses the JSON-encoded
-// data and stores it in the given pointer.
-func Unmarshal(raw []byte, to any) error {
-	d := &decoderBuilder{dateFormat: time.RFC3339}
-	return d.unmarshal(raw, to)
-}
-
-// UnmarshalRoot is like Unmarshal, but doesn't try to call MarshalJSON on the
-// root element. Useful if a struct's UnmarshalJSON is overrode to use the
-// behavior of this encoder versus the standard library.
-func UnmarshalRoot(raw []byte, to any) error {
-	d := &decoderBuilder{dateFormat: time.RFC3339, root: true}
-	return d.unmarshal(raw, to)
-}
-
-// decoderBuilder contains the 'compile-time' state of the decoder.
-type decoderBuilder struct {
-	// Whether or not this is the first element and called by [UnmarshalRoot], see
-	// the documentation there to see why this is necessary.
-	root bool
-	// The dateFormat (a format string for [time.Format]) which is chosen by the
-	// last struct tag that was seen.
-	dateFormat string
-}
-
-// decoderState contains the 'run-time' state of the decoder.
-type decoderState struct {
-	strict    bool
-	exactness exactness
-}
-
-// Exactness refers to how close to the type the result was if deserialization
-// was successful. This is useful in deserializing unions, where you want to try
-// each entry, first with strict, then with looser validation, without actually
-// having to do a lot of redundant work by marshalling twice (or maybe even more
-// times).
-type exactness int8
-
-const (
-	// Some values had to fudged a bit, for example by converting a string to an
-	// int, or an enum with extra values.
-	loose exactness = iota
-	// There are some extra arguments, but other wise it matches the union.
-	extras
-	// Exactly right.
-	exact
-)
-
-type decoderFunc func(node gjson.Result, value reflect.Value, state *decoderState) error
-
-type decoderField struct {
-	tag    parsedStructTag
-	fn     decoderFunc
-	idx    []int
-	goname string
-}
-
-type decoderEntry struct {
-	reflect.Type
-	dateFormat string
-	root       bool
-}
-
-func (d *decoderBuilder) unmarshal(raw []byte, to any) error {
-	value := reflect.ValueOf(to).Elem()
-	result := gjson.ParseBytes(raw)
-	if !value.IsValid() {
-		return fmt.Errorf("apijson: cannot marshal into invalid value")
-	}
-	return d.typeDecoder(value.Type())(result, value, &decoderState{strict: false, exactness: exact})
-}
-
-func (d *decoderBuilder) typeDecoder(t reflect.Type) decoderFunc {
-	entry := decoderEntry{
-		Type:       t,
-		dateFormat: d.dateFormat,
-		root:       d.root,
-	}
-
-	if fi, ok := decoders.Load(entry); ok {
-		return fi.(decoderFunc)
-	}
-
-	// To deal with recursive types, populate the map with an
-	// indirect func before we build it. This type waits on the
-	// real func (f) to be ready and then calls it. This indirect
-	// func is only used for recursive types.
-	var (
-		wg sync.WaitGroup
-		f  decoderFunc
-	)
-	wg.Add(1)
-	fi, loaded := decoders.LoadOrStore(entry, decoderFunc(func(node gjson.Result, v reflect.Value, state *decoderState) error {
-		wg.Wait()
-		return f(node, v, state)
-	}))
-	if loaded {
-		return fi.(decoderFunc)
-	}
-
-	// Compute the real decoder and replace the indirect func with it.
-	f = d.newTypeDecoder(t)
-	wg.Done()
-	decoders.Store(entry, f)
-	return f
-}
-
-func indirectUnmarshalerDecoder(n gjson.Result, v reflect.Value, state *decoderState) error {
-	return v.Addr().Interface().(json.Unmarshaler).UnmarshalJSON([]byte(n.Raw))
-}
-
-func unmarshalerDecoder(n gjson.Result, v reflect.Value, state *decoderState) error {
-	if v.Kind() == reflect.Pointer && v.CanSet() {
-		v.Set(reflect.New(v.Type().Elem()))
-	}
-	return v.Interface().(json.Unmarshaler).UnmarshalJSON([]byte(n.Raw))
-}
-
-func (d *decoderBuilder) newTypeDecoder(t reflect.Type) decoderFunc {
-	if t.ConvertibleTo(reflect.TypeOf(time.Time{})) {
-		return d.newTimeTypeDecoder(t)
-	}
-	if !d.root && t.Implements(reflect.TypeOf((*json.Unmarshaler)(nil)).Elem()) {
-		return unmarshalerDecoder
-	}
-	if !d.root && reflect.PointerTo(t).Implements(reflect.TypeOf((*json.Unmarshaler)(nil)).Elem()) {
-		if _, ok := unionVariants[t]; !ok {
-			return indirectUnmarshalerDecoder
-		}
-	}
-	d.root = false
-
-	if _, ok := unionRegistry[t]; ok {
-		return d.newUnionDecoder(t)
-	}
-
-	switch t.Kind() {
-	case reflect.Pointer:
-		inner := t.Elem()
-		innerDecoder := d.typeDecoder(inner)
-
-		return func(n gjson.Result, v reflect.Value, state *decoderState) error {
-			if !v.IsValid() {
-				return fmt.Errorf("apijson: unexpected invalid reflection value %+#v", v)
-			}
-
-			newValue := reflect.New(inner).Elem()
-			err := innerDecoder(n, newValue, state)
-			if err != nil {
-				return err
-			}
-
-			v.Set(newValue.Addr())
-			return nil
-		}
-	case reflect.Struct:
-		return d.newStructTypeDecoder(t)
-	case reflect.Array:
-		fallthrough
-	case reflect.Slice:
-		return d.newArrayTypeDecoder(t)
-	case reflect.Map:
-		return d.newMapDecoder(t)
-	case reflect.Interface:
-		return func(node gjson.Result, value reflect.Value, state *decoderState) error {
-			if !value.IsValid() {
-				return fmt.Errorf("apijson: unexpected invalid value %+#v", value)
-			}
-			if node.Value() != nil && value.CanSet() {
-				value.Set(reflect.ValueOf(node.Value()))
-			}
-			return nil
-		}
-	default:
-		return d.newPrimitiveTypeDecoder(t)
-	}
-}
-
-// newUnionDecoder returns a decoderFunc that deserializes into a union using an
-// algorithm roughly similar to Pydantic's [smart algorithm].
-//
-// Conceptually this is equivalent to choosing the best schema based on how 'exact'
-// the deserialization is for each of the schemas.
-//
-// If there is a tie in the level of exactness, then the tie is broken
-// left-to-right.
-//
-// [smart algorithm]: https://docs.pydantic.dev/latest/concepts/unions/#smart-mode
-func (d *decoderBuilder) newUnionDecoder(t reflect.Type) decoderFunc {
-	unionEntry, ok := unionRegistry[t]
-	if !ok {
-		panic("apijson: couldn't find union of type " + t.String() + " in union registry")
-	}
-	decoders := []decoderFunc{}
-	for _, variant := range unionEntry.variants {
-		decoder := d.typeDecoder(variant.Type)
-		decoders = append(decoders, decoder)
-	}
-	return func(n gjson.Result, v reflect.Value, state *decoderState) error {
-		// If there is a discriminator match, circumvent the exactness logic entirely
-		for idx, variant := range unionEntry.variants {
-			decoder := decoders[idx]
-			if variant.TypeFilter != n.Type {
-				continue
-			}
-
-			if len(unionEntry.discriminatorKey) != 0 {
-				discriminatorValue := n.Get(EscapeSJSONKey(unionEntry.discriminatorKey)).Value()
-				if discriminatorValue == variant.DiscriminatorValue {
-					inner := reflect.New(variant.Type).Elem()
-					err := decoder(n, inner, state)
-					v.Set(inner)
-					return err
-				}
-			}
-		}
-
-		// Set bestExactness to worse than loose
-		bestExactness := loose - 1
-		for idx, variant := range unionEntry.variants {
-			decoder := decoders[idx]
-			if variant.TypeFilter != n.Type {
-				continue
-			}
-			sub := decoderState{strict: state.strict, exactness: exact}
-			inner := reflect.New(variant.Type).Elem()
-			err := decoder(n, inner, &sub)
-			if err != nil {
-				continue
-			}
-			if sub.exactness == exact {
-				v.Set(inner)
-				return nil
-			}
-			if sub.exactness > bestExactness {
-				v.Set(inner)
-				bestExactness = sub.exactness
-			}
-		}
-
-		if bestExactness < loose {
-			return errors.New("apijson: was not able to coerce type as union")
-		}
-
-		if guardStrict(state, bestExactness != exact) {
-			return errors.New("apijson: was not able to coerce type as union strictly")
-		}
-
-		return nil
-	}
-}
-
-func (d *decoderBuilder) newMapDecoder(t reflect.Type) decoderFunc {
-	keyType := t.Key()
-	itemType := t.Elem()
-	itemDecoder := d.typeDecoder(itemType)
-
-	return func(node gjson.Result, value reflect.Value, state *decoderState) (err error) {
-		mapValue := reflect.MakeMapWithSize(t, len(node.Map()))
-
-		node.ForEach(func(key, value gjson.Result) bool {
-			// It's fine for us to just use `ValueOf` here because the key types will
-			// always be primitive types so we don't need to decode it using the standard pattern
-			keyValue := reflect.ValueOf(key.Value())
-			if !keyValue.IsValid() {
-				if err == nil {
-					err = fmt.Errorf("apijson: received invalid key type %v", keyValue.String())
-				}
-				return false
-			}
-			if keyValue.Type() != keyType {
-				if err == nil {
-					err = fmt.Errorf("apijson: expected key type %v but got %v", keyType, keyValue.Type())
-				}
-				return false
-			}
-
-			itemValue := reflect.New(itemType).Elem()
-			itemerr := itemDecoder(value, itemValue, state)
-			if itemerr != nil {
-				if err == nil {
-					err = itemerr
-				}
-				return false
-			}
-
-			mapValue.SetMapIndex(keyValue, itemValue)
-			return true
-		})
-
-		if err != nil {
-			return err
-		}
-		value.Set(mapValue)
-		return nil
-	}
-}
-
-func (d *decoderBuilder) newArrayTypeDecoder(t reflect.Type) decoderFunc {
-	itemDecoder := d.typeDecoder(t.Elem())
-
-	return func(node gjson.Result, value reflect.Value, state *decoderState) (err error) {
-		if !node.IsArray() {
-			return fmt.Errorf("apijson: could not deserialize to an array")
-		}
-
-		arrayNode := node.Array()
-
-		arrayValue := reflect.MakeSlice(reflect.SliceOf(t.Elem()), len(arrayNode), len(arrayNode))
-		for i, itemNode := range arrayNode {
-			err = itemDecoder(itemNode, arrayValue.Index(i), state)
-			if err != nil {
-				return err
-			}
-		}
-
-		value.Set(arrayValue)
-		return nil
-	}
-}
-
-func (d *decoderBuilder) newStructTypeDecoder(t reflect.Type) decoderFunc {
-	// map of json field name to struct field decoders
-	decoderFields := map[string]decoderField{}
-	anonymousDecoders := []decoderField{}
-	extraDecoder := (*decoderField)(nil)
-	inlineDecoder := (*decoderField)(nil)
-
-	for i := 0; i < t.NumField(); i++ {
-		idx := []int{i}
-		field := t.FieldByIndex(idx)
-		if !field.IsExported() {
-			continue
-		}
-		// If this is an embedded struct, traverse one level deeper to extract
-		// the fields and get their encoders as well.
-		if field.Anonymous {
-			anonymousDecoders = append(anonymousDecoders, decoderField{
-				fn:  d.typeDecoder(field.Type),
-				idx: idx[:],
-			})
-			continue
-		}
-		// If json tag is not present, then we skip, which is intentionally
-		// different behavior from the stdlib.
-		ptag, ok := parseJSONStructTag(field)
-		if !ok {
-			continue
-		}
-		// We only want to support unexported fields if they're tagged with
-		// `extras` because that field shouldn't be part of the public API.
-		if ptag.extras {
-			extraDecoder = &decoderField{ptag, d.typeDecoder(field.Type.Elem()), idx, field.Name}
-			continue
-		}
-		if ptag.inline {
-			inlineDecoder = &decoderField{ptag, d.typeDecoder(field.Type), idx, field.Name}
-			continue
-		}
-		if ptag.metadata {
-			continue
-		}
-
-		oldFormat := d.dateFormat
-		dateFormat, ok := parseFormatStructTag(field)
-		if ok {
-			switch dateFormat {
-			case "date-time":
-				d.dateFormat = time.RFC3339
-			case "date":
-				d.dateFormat = "2006-01-02"
-			}
-		}
-		decoderFields[ptag.name] = decoderField{ptag, d.typeDecoder(field.Type), idx, field.Name}
-		d.dateFormat = oldFormat
-	}
-
-	return func(node gjson.Result, value reflect.Value, state *decoderState) (err error) {
-		if field := value.FieldByName("JSON"); field.IsValid() {
-			if raw := field.FieldByName("raw"); raw.IsValid() {
-				setUnexportedField(raw, node.Raw)
-			}
-		}
-
-		for _, decoder := range anonymousDecoders {
-			// ignore errors
-			decoder.fn(node, value.FieldByIndex(decoder.idx), state)
-		}
-
-		if inlineDecoder != nil {
-			var meta Field
-			dest := value.FieldByIndex(inlineDecoder.idx)
-			isValid := false
-			if dest.IsValid() && node.Type != gjson.Null {
-				err = inlineDecoder.fn(node, dest, state)
-				if err == nil {
-					isValid = true
-				}
-			}
-
-			if node.Type == gjson.Null {
-				meta = Field{
-					raw:    node.Raw,
-					status: null,
-				}
-			} else if !isValid {
-				meta = Field{
-					raw:    node.Raw,
-					status: invalid,
-				}
-			} else if isValid {
-				meta = Field{
-					raw:    node.Raw,
-					status: valid,
-				}
-			}
-			if metadata := getSubField(value, inlineDecoder.idx, inlineDecoder.goname); metadata.IsValid() {
-				metadata.Set(reflect.ValueOf(meta))
-			}
-			return err
-		}
-
-		typedExtraType := reflect.Type(nil)
-		typedExtraFields := reflect.Value{}
-		if extraDecoder != nil {
-			typedExtraType = value.FieldByIndex(extraDecoder.idx).Type()
-			typedExtraFields = reflect.MakeMap(typedExtraType)
-		}
-		untypedExtraFields := map[string]Field{}
-
-		for fieldName, itemNode := range node.Map() {
-			df, explicit := decoderFields[fieldName]
-			var (
-				dest reflect.Value
-				fn   decoderFunc
-				meta Field
-			)
-			if explicit {
-				fn = df.fn
-				dest = value.FieldByIndex(df.idx)
-			}
-			if !explicit && extraDecoder != nil {
-				dest = reflect.New(typedExtraType.Elem()).Elem()
-				fn = extraDecoder.fn
-			}
-
-			isValid := false
-			if dest.IsValid() && itemNode.Type != gjson.Null {
-				err = fn(itemNode, dest, state)
-				if err == nil {
-					isValid = true
-				}
-			}
-
-			if itemNode.Type == gjson.Null {
-				meta = Field{
-					raw:    itemNode.Raw,
-					status: null,
-				}
-			} else if !isValid {
-				meta = Field{
-					raw:    itemNode.Raw,
-					status: invalid,
-				}
-			} else if isValid {
-				meta = Field{
-					raw:    itemNode.Raw,
-					status: valid,
-				}
-			}
-
-			if explicit {
-				if metadata := getSubField(value, df.idx, df.goname); metadata.IsValid() {
-					metadata.Set(reflect.ValueOf(meta))
-				}
-			}
-			if !explicit {
-				untypedExtraFields[fieldName] = meta
-			}
-			if !explicit && extraDecoder != nil {
-				typedExtraFields.SetMapIndex(reflect.ValueOf(fieldName), dest)
-			}
-		}
-
-		if extraDecoder != nil && typedExtraFields.Len() > 0 {
-			value.FieldByIndex(extraDecoder.idx).Set(typedExtraFields)
-		}
-
-		// Set exactness to 'extras' if there are untyped, extra fields.
-		if len(untypedExtraFields) > 0 && state.exactness > extras {
-			state.exactness = extras
-		}
-
-		if metadata := getSubField(value, []int{-1}, "ExtraFields"); metadata.IsValid() && len(untypedExtraFields) > 0 {
-			metadata.Set(reflect.ValueOf(untypedExtraFields))
-		}
-		return nil
-	}
-}
-
-func (d *decoderBuilder) newPrimitiveTypeDecoder(t reflect.Type) decoderFunc {
-	switch t.Kind() {
-	case reflect.String:
-		return func(n gjson.Result, v reflect.Value, state *decoderState) error {
-			v.SetString(n.String())
-			if guardStrict(state, n.Type != gjson.String) {
-				return fmt.Errorf("apijson: failed to parse string strictly")
-			}
-			// Everything that is not an object can be loosely stringified.
-			if n.Type == gjson.JSON {
-				return fmt.Errorf("apijson: failed to parse string")
-			}
-			if guardUnknown(state, v) {
-				return fmt.Errorf("apijson: failed string enum validation")
-			}
-			return nil
-		}
-	case reflect.Bool:
-		return func(n gjson.Result, v reflect.Value, state *decoderState) error {
-			v.SetBool(n.Bool())
-			if guardStrict(state, n.Type != gjson.True && n.Type != gjson.False) {
-				return fmt.Errorf("apijson: failed to parse bool strictly")
-			}
-			// Numbers and strings that are either 'true' or 'false' can be loosely
-			// deserialized as bool.
-			if n.Type == gjson.String && (n.Raw != "true" && n.Raw != "false") || n.Type == gjson.JSON {
-				return fmt.Errorf("apijson: failed to parse bool")
-			}
-			if guardUnknown(state, v) {
-				return fmt.Errorf("apijson: failed bool enum validation")
-			}
-			return nil
-		}
-	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
-		return func(n gjson.Result, v reflect.Value, state *decoderState) error {
-			v.SetInt(n.Int())
-			if guardStrict(state, n.Type != gjson.Number || n.Num != float64(int(n.Num))) {
-				return fmt.Errorf("apijson: failed to parse int strictly")
-			}
-			// Numbers, booleans, and strings that maybe look like numbers can be
-			// loosely deserialized as numbers.
-			if n.Type == gjson.JSON || (n.Type == gjson.String && !canParseAsNumber(n.Str)) {
-				return fmt.Errorf("apijson: failed to parse int")
-			}
-			if guardUnknown(state, v) {
-				return fmt.Errorf("apijson: failed int enum validation")
-			}
-			return nil
-		}
-	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
-		return func(n gjson.Result, v reflect.Value, state *decoderState) error {
-			v.SetUint(n.Uint())
-			if guardStrict(state, n.Type != gjson.Number || n.Num != float64(int(n.Num)) || n.Num < 0) {
-				return fmt.Errorf("apijson: failed to parse uint strictly")
-			}
-			// Numbers, booleans, and strings that maybe look like numbers can be
-			// loosely deserialized as uint.
-			if n.Type == gjson.JSON || (n.Type == gjson.String && !canParseAsNumber(n.Str)) {
-				return fmt.Errorf("apijson: failed to parse uint")
-			}
-			if guardUnknown(state, v) {
-				return fmt.Errorf("apijson: failed uint enum validation")
-			}
-			return nil
-		}
-	case reflect.Float32, reflect.Float64:
-		return func(n gjson.Result, v reflect.Value, state *decoderState) error {
-			v.SetFloat(n.Float())
-			if guardStrict(state, n.Type != gjson.Number) {
-				return fmt.Errorf("apijson: failed to parse float strictly")
-			}
-			// Numbers, booleans, and strings that maybe look like numbers can be
-			// loosely deserialized as floats.
-			if n.Type == gjson.JSON || (n.Type == gjson.String && !canParseAsNumber(n.Str)) {
-				return fmt.Errorf("apijson: failed to parse float")
-			}
-			if guardUnknown(state, v) {
-				return fmt.Errorf("apijson: failed float enum validation")
-			}
-			return nil
-		}
-	default:
-		return func(node gjson.Result, v reflect.Value, state *decoderState) error {
-			return fmt.Errorf("unknown type received at primitive decoder: %s", t.String())
-		}
-	}
-}
-
-func (d *decoderBuilder) newTimeTypeDecoder(t reflect.Type) decoderFunc {
-	format := d.dateFormat
-	return func(n gjson.Result, v reflect.Value, state *decoderState) error {
-		parsed, err := time.Parse(format, n.Str)
-		if err == nil {
-			v.Set(reflect.ValueOf(parsed).Convert(t))
-			return nil
-		}
-
-		if guardStrict(state, true) {
-			return err
-		}
-
-		layouts := []string{
-			"2006-01-02",
-			"2006-01-02T15:04:05Z07:00",
-			"2006-01-02T15:04:05Z0700",
-			"2006-01-02T15:04:05",
-			"2006-01-02 15:04:05Z07:00",
-			"2006-01-02 15:04:05Z0700",
-			"2006-01-02 15:04:05",
-		}
-
-		for _, layout := range layouts {
-			parsed, err := time.Parse(layout, n.Str)
-			if err == nil {
-				v.Set(reflect.ValueOf(parsed).Convert(t))
-				return nil
-			}
-		}
-
-		return fmt.Errorf("unable to leniently parse date-time string: %s", n.Str)
-	}
-}
-
-func setUnexportedField(field reflect.Value, value interface{}) {
-	reflect.NewAt(field.Type(), unsafe.Pointer(field.UnsafeAddr())).Elem().Set(reflect.ValueOf(value))
-}
-
-func guardStrict(state *decoderState, cond bool) bool {
-	if !cond {
-		return false
-	}
-
-	if state.strict {
-		return true
-	}
-
-	state.exactness = loose
-	return false
-}
-
-func canParseAsNumber(str string) bool {
-	_, err := strconv.ParseFloat(str, 64)
-	return err == nil
-}
-
-func guardUnknown(state *decoderState, v reflect.Value) bool {
-	if have, ok := v.Interface().(interface{ IsKnown() bool }); guardStrict(state, ok && !have.IsKnown()) {
-		return true
-	}
-	return false
-}
diff --git a/packages/sdk/go/internal/apijson/encoder.go b/packages/sdk/go/internal/apijson/encoder.go
deleted file mode 100644
index 66b319b66..000000000
--- a/packages/sdk/go/internal/apijson/encoder.go
+++ /dev/null
@@ -1,398 +0,0 @@
-package apijson
-
-import (
-	"bytes"
-	"encoding/json"
-	"fmt"
-	"reflect"
-	"sort"
-	"strconv"
-	"strings"
-	"sync"
-	"time"
-
-	"github.com/tidwall/sjson"
-
-	"github.com/sst/opencode-sdk-go/internal/param"
-)
-
-var encoders sync.Map // map[encoderEntry]encoderFunc
-
-// If we want to set a literal key value into JSON using sjson, we need to make sure it doesn't have
-// special characters that sjson interprets as a path.
-var EscapeSJSONKey = strings.NewReplacer("\\", "\\\\", "|", "\\|", "#", "\\#", "@", "\\@", "*", "\\*", ".", "\\.", ":", "\\:", "?", "\\?").Replace
-
-func Marshal(value interface{}) ([]byte, error) {
-	e := &encoder{dateFormat: time.RFC3339}
-	return e.marshal(value)
-}
-
-func MarshalRoot(value interface{}) ([]byte, error) {
-	e := &encoder{root: true, dateFormat: time.RFC3339}
-	return e.marshal(value)
-}
-
-type encoder struct {
-	dateFormat string
-	root       bool
-}
-
-type encoderFunc func(value reflect.Value) ([]byte, error)
-
-type encoderField struct {
-	tag parsedStructTag
-	fn  encoderFunc
-	idx []int
-}
-
-type encoderEntry struct {
-	reflect.Type
-	dateFormat string
-	root       bool
-}
-
-func (e *encoder) marshal(value interface{}) ([]byte, error) {
-	val := reflect.ValueOf(value)
-	if !val.IsValid() {
-		return nil, nil
-	}
-	typ := val.Type()
-	enc := e.typeEncoder(typ)
-	return enc(val)
-}
-
-func (e *encoder) typeEncoder(t reflect.Type) encoderFunc {
-	entry := encoderEntry{
-		Type:       t,
-		dateFormat: e.dateFormat,
-		root:       e.root,
-	}
-
-	if fi, ok := encoders.Load(entry); ok {
-		return fi.(encoderFunc)
-	}
-
-	// To deal with recursive types, populate the map with an
-	// indirect func before we build it. This type waits on the
-	// real func (f) to be ready and then calls it. This indirect
-	// func is only used for recursive types.
-	var (
-		wg sync.WaitGroup
-		f  encoderFunc
-	)
-	wg.Add(1)
-	fi, loaded := encoders.LoadOrStore(entry, encoderFunc(func(v reflect.Value) ([]byte, error) {
-		wg.Wait()
-		return f(v)
-	}))
-	if loaded {
-		return fi.(encoderFunc)
-	}
-
-	// Compute the real encoder and replace the indirect func with it.
-	f = e.newTypeEncoder(t)
-	wg.Done()
-	encoders.Store(entry, f)
-	return f
-}
-
-func marshalerEncoder(v reflect.Value) ([]byte, error) {
-	return v.Interface().(json.Marshaler).MarshalJSON()
-}
-
-func indirectMarshalerEncoder(v reflect.Value) ([]byte, error) {
-	return v.Addr().Interface().(json.Marshaler).MarshalJSON()
-}
-
-func (e *encoder) newTypeEncoder(t reflect.Type) encoderFunc {
-	if t.ConvertibleTo(reflect.TypeOf(time.Time{})) {
-		return e.newTimeTypeEncoder()
-	}
-	if !e.root && t.Implements(reflect.TypeOf((*json.Marshaler)(nil)).Elem()) {
-		return marshalerEncoder
-	}
-	if !e.root && reflect.PointerTo(t).Implements(reflect.TypeOf((*json.Marshaler)(nil)).Elem()) {
-		return indirectMarshalerEncoder
-	}
-	e.root = false
-	switch t.Kind() {
-	case reflect.Pointer:
-		inner := t.Elem()
-
-		innerEncoder := e.typeEncoder(inner)
-		return func(v reflect.Value) ([]byte, error) {
-			if !v.IsValid() || v.IsNil() {
-				return nil, nil
-			}
-			return innerEncoder(v.Elem())
-		}
-	case reflect.Struct:
-		return e.newStructTypeEncoder(t)
-	case reflect.Array:
-		fallthrough
-	case reflect.Slice:
-		return e.newArrayTypeEncoder(t)
-	case reflect.Map:
-		return e.newMapEncoder(t)
-	case reflect.Interface:
-		return e.newInterfaceEncoder()
-	default:
-		return e.newPrimitiveTypeEncoder(t)
-	}
-}
-
-func (e *encoder) newPrimitiveTypeEncoder(t reflect.Type) encoderFunc {
-	switch t.Kind() {
-	// Note that we could use `gjson` to encode these types but it would complicate our
-	// code more and this current code shouldn't cause any issues
-	case reflect.String:
-		return func(v reflect.Value) ([]byte, error) {
-			return json.Marshal(v.Interface())
-		}
-	case reflect.Bool:
-		return func(v reflect.Value) ([]byte, error) {
-			if v.Bool() {
-				return []byte("true"), nil
-			}
-			return []byte("false"), nil
-		}
-	case reflect.Int, reflect.Int16, reflect.Int32, reflect.Int64:
-		return func(v reflect.Value) ([]byte, error) {
-			return []byte(strconv.FormatInt(v.Int(), 10)), nil
-		}
-	case reflect.Uint, reflect.Uint16, reflect.Uint32, reflect.Uint64:
-		return func(v reflect.Value) ([]byte, error) {
-			return []byte(strconv.FormatUint(v.Uint(), 10)), nil
-		}
-	case reflect.Float32:
-		return func(v reflect.Value) ([]byte, error) {
-			return []byte(strconv.FormatFloat(v.Float(), 'f', -1, 32)), nil
-		}
-	case reflect.Float64:
-		return func(v reflect.Value) ([]byte, error) {
-			return []byte(strconv.FormatFloat(v.Float(), 'f', -1, 64)), nil
-		}
-	default:
-		return func(v reflect.Value) ([]byte, error) {
-			return nil, fmt.Errorf("unknown type received at primitive encoder: %s", t.String())
-		}
-	}
-}
-
-func (e *encoder) newArrayTypeEncoder(t reflect.Type) encoderFunc {
-	itemEncoder := e.typeEncoder(t.Elem())
-
-	return func(value reflect.Value) ([]byte, error) {
-		json := []byte("[]")
-		for i := 0; i < value.Len(); i++ {
-			var value, err = itemEncoder(value.Index(i))
-			if err != nil {
-				return nil, err
-			}
-			if value == nil {
-				// Assume that empty items should be inserted as `null` so that the output array
-				// will be the same length as the input array
-				value = []byte("null")
-			}
-
-			json, err = sjson.SetRawBytes(json, "-1", value)
-			if err != nil {
-				return nil, err
-			}
-		}
-
-		return json, nil
-	}
-}
-
-func (e *encoder) newStructTypeEncoder(t reflect.Type) encoderFunc {
-	if t.Implements(reflect.TypeOf((*param.FieldLike)(nil)).Elem()) {
-		return e.newFieldTypeEncoder(t)
-	}
-
-	encoderFields := []encoderField{}
-	extraEncoder := (*encoderField)(nil)
-
-	// This helper allows us to recursively collect field encoders into a flat
-	// array. The parameter `index` keeps track of the access patterns necessary
-	// to get to some field.
-	var collectEncoderFields func(r reflect.Type, index []int)
-	collectEncoderFields = func(r reflect.Type, index []int) {
-		for i := 0; i < r.NumField(); i++ {
-			idx := append(index, i)
-			field := t.FieldByIndex(idx)
-			if !field.IsExported() {
-				continue
-			}
-			// If this is an embedded struct, traverse one level deeper to extract
-			// the field and get their encoders as well.
-			if field.Anonymous {
-				collectEncoderFields(field.Type, idx)
-				continue
-			}
-			// If json tag is not present, then we skip, which is intentionally
-			// different behavior from the stdlib.
-			ptag, ok := parseJSONStructTag(field)
-			if !ok {
-				continue
-			}
-			// We only want to support unexported field if they're tagged with
-			// `extras` because that field shouldn't be part of the public API. We
-			// also want to only keep the top level extras
-			if ptag.extras && len(index) == 0 {
-				extraEncoder = &encoderField{ptag, e.typeEncoder(field.Type.Elem()), idx}
-				continue
-			}
-			if ptag.name == "-" {
-				continue
-			}
-
-			dateFormat, ok := parseFormatStructTag(field)
-			oldFormat := e.dateFormat
-			if ok {
-				switch dateFormat {
-				case "date-time":
-					e.dateFormat = time.RFC3339
-				case "date":
-					e.dateFormat = "2006-01-02"
-				}
-			}
-			encoderFields = append(encoderFields, encoderField{ptag, e.typeEncoder(field.Type), idx})
-			e.dateFormat = oldFormat
-		}
-	}
-	collectEncoderFields(t, []int{})
-
-	// Ensure deterministic output by sorting by lexicographic order
-	sort.Slice(encoderFields, func(i, j int) bool {
-		return encoderFields[i].tag.name < encoderFields[j].tag.name
-	})
-
-	return func(value reflect.Value) (json []byte, err error) {
-		json = []byte("{}")
-
-		for _, ef := range encoderFields {
-			field := value.FieldByIndex(ef.idx)
-			encoded, err := ef.fn(field)
-			if err != nil {
-				return nil, err
-			}
-			if encoded == nil {
-				continue
-			}
-			json, err = sjson.SetRawBytes(json, EscapeSJSONKey(ef.tag.name), encoded)
-			if err != nil {
-				return nil, err
-			}
-		}
-
-		if extraEncoder != nil {
-			json, err = e.encodeMapEntries(json, value.FieldByIndex(extraEncoder.idx))
-			if err != nil {
-				return nil, err
-			}
-		}
-		return
-	}
-}
-
-func (e *encoder) newFieldTypeEncoder(t reflect.Type) encoderFunc {
-	f, _ := t.FieldByName("Value")
-	enc := e.typeEncoder(f.Type)
-
-	return func(value reflect.Value) (json []byte, err error) {
-		present := value.FieldByName("Present")
-		if !present.Bool() {
-			return nil, nil
-		}
-		null := value.FieldByName("Null")
-		if null.Bool() {
-			return []byte("null"), nil
-		}
-		raw := value.FieldByName("Raw")
-		if !raw.IsNil() {
-			return e.typeEncoder(raw.Type())(raw)
-		}
-		return enc(value.FieldByName("Value"))
-	}
-}
-
-func (e *encoder) newTimeTypeEncoder() encoderFunc {
-	format := e.dateFormat
-	return func(value reflect.Value) (json []byte, err error) {
-		return []byte(`"` + value.Convert(reflect.TypeOf(time.Time{})).Interface().(time.Time).Format(format) + `"`), nil
-	}
-}
-
-func (e encoder) newInterfaceEncoder() encoderFunc {
-	return func(value reflect.Value) ([]byte, error) {
-		value = value.Elem()
-		if !value.IsValid() {
-			return nil, nil
-		}
-		return e.typeEncoder(value.Type())(value)
-	}
-}
-
-// Given a []byte of json (may either be an empty object or an object that already contains entries)
-// encode all of the entries in the map to the json byte array.
-func (e *encoder) encodeMapEntries(json []byte, v reflect.Value) ([]byte, error) {
-	type mapPair struct {
-		key   []byte
-		value reflect.Value
-	}
-
-	pairs := []mapPair{}
-	keyEncoder := e.typeEncoder(v.Type().Key())
-
-	iter := v.MapRange()
-	for iter.Next() {
-		var encodedKeyString string
-		if iter.Key().Type().Kind() == reflect.String {
-			encodedKeyString = iter.Key().String()
-		} else {
-			var err error
-			encodedKeyBytes, err := keyEncoder(iter.Key())
-			if err != nil {
-				return nil, err
-			}
-			encodedKeyString = string(encodedKeyBytes)
-		}
-		encodedKey := []byte(encodedKeyString)
-		pairs = append(pairs, mapPair{key: encodedKey, value: iter.Value()})
-	}
-
-	// Ensure deterministic output
-	sort.Slice(pairs, func(i, j int) bool {
-		return bytes.Compare(pairs[i].key, pairs[j].key) < 0
-	})
-
-	elementEncoder := e.typeEncoder(v.Type().Elem())
-	for _, p := range pairs {
-		encodedValue, err := elementEncoder(p.value)
-		if err != nil {
-			return nil, err
-		}
-		if len(encodedValue) == 0 {
-			continue
-		}
-		json, err = sjson.SetRawBytes(json, EscapeSJSONKey(string(p.key)), encodedValue)
-		if err != nil {
-			return nil, err
-		}
-	}
-
-	return json, nil
-}
-
-func (e *encoder) newMapEncoder(t reflect.Type) encoderFunc {
-	return func(value reflect.Value) ([]byte, error) {
-		json := []byte("{}")
-		var err error
-		json, err = e.encodeMapEntries(json, value)
-		if err != nil {
-			return nil, err
-		}
-		return json, nil
-	}
-}
diff --git a/packages/sdk/go/internal/apijson/field.go b/packages/sdk/go/internal/apijson/field.go
deleted file mode 100644
index 3ef207c58..000000000
--- a/packages/sdk/go/internal/apijson/field.go
+++ /dev/null
@@ -1,41 +0,0 @@
-package apijson
-
-import "reflect"
-
-type status uint8
-
-const (
-	missing status = iota
-	null
-	invalid
-	valid
-)
-
-type Field struct {
-	raw    string
-	status status
-}
-
-// Returns true if the field is explicitly `null` _or_ if it is not present at all (ie, missing).
-// To check if the field's key is present in the JSON with an explicit null value,
-// you must check `f.IsNull() && !f.IsMissing()`.
-func (j Field) IsNull() bool    { return j.status <= null }
-func (j Field) IsMissing() bool { return j.status == missing }
-func (j Field) IsInvalid() bool { return j.status == invalid }
-func (j Field) Raw() string     { return j.raw }
-
-func getSubField(root reflect.Value, index []int, name string) reflect.Value {
-	strct := root.FieldByIndex(index[:len(index)-1])
-	if !strct.IsValid() {
-		panic("couldn't find encapsulating struct for field " + name)
-	}
-	meta := strct.FieldByName("JSON")
-	if !meta.IsValid() {
-		return reflect.Value{}
-	}
-	field := meta.FieldByName(name)
-	if !field.IsValid() {
-		return reflect.Value{}
-	}
-	return field
-}
diff --git a/packages/sdk/go/internal/apijson/field_test.go b/packages/sdk/go/internal/apijson/field_test.go
deleted file mode 100644
index 2e170c76f..000000000
--- a/packages/sdk/go/internal/apijson/field_test.go
+++ /dev/null
@@ -1,66 +0,0 @@
-package apijson
-
-import (
-	"testing"
-	"time"
-
-	"github.com/sst/opencode-sdk-go/internal/param"
-)
-
-type Struct struct {
-	A string `json:"a"`
-	B int64  `json:"b"`
-}
-
-type FieldStruct struct {
-	A param.Field[string]    `json:"a"`
-	B param.Field[int64]     `json:"b"`
-	C param.Field[Struct]    `json:"c"`
-	D param.Field[time.Time] `json:"d" format:"date"`
-	E param.Field[time.Time] `json:"e" format:"date-time"`
-	F param.Field[int64]     `json:"f"`
-}
-
-func TestFieldMarshal(t *testing.T) {
-	tests := map[string]struct {
-		value    interface{}
-		expected string
-	}{
-		"null_string": {param.Field[string]{Present: true, Null: true}, "null"},
-		"null_int":    {param.Field[int]{Present: true, Null: true}, "null"},
-		"null_int64":  {param.Field[int64]{Present: true, Null: true}, "null"},
-		"null_struct": {param.Field[Struct]{Present: true, Null: true}, "null"},
-
-		"string": {param.Field[string]{Present: true, Value: "string"}, `"string"`},
-		"int":    {param.Field[int]{Present: true, Value: 123}, "123"},
-		"int64":  {param.Field[int64]{Present: true, Value: int64(123456789123456789)}, "123456789123456789"},
-		"struct": {param.Field[Struct]{Present: true, Value: Struct{A: "yo", B: 123}}, `{"a":"yo","b":123}`},
-
-		"string_raw": {param.Field[int]{Present: true, Raw: "string"}, `"string"`},
-		"int_raw":    {param.Field[int]{Present: true, Raw: 123}, "123"},
-		"int64_raw":  {param.Field[int]{Present: true, Raw: int64(123456789123456789)}, "123456789123456789"},
-		"struct_raw": {param.Field[int]{Present: true, Raw: Struct{A: "yo", B: 123}}, `{"a":"yo","b":123}`},
-
-		"param_struct": {
-			FieldStruct{
-				A: param.Field[string]{Present: true, Value: "hello"},
-				B: param.Field[int64]{Present: true, Value: int64(12)},
-				D: param.Field[time.Time]{Present: true, Value: time.Date(2023, time.March, 18, 14, 47, 38, 0, time.UTC)},
-				E: param.Field[time.Time]{Present: true, Value: time.Date(2023, time.March, 18, 14, 47, 38, 0, time.UTC)},
-			},
-			`{"a":"hello","b":12,"d":"2023-03-18","e":"2023-03-18T14:47:38Z"}`,
-		},
-	}
-
-	for name, test := range tests {
-		t.Run(name, func(t *testing.T) {
-			b, err := Marshal(test.value)
-			if err != nil {
-				t.Fatalf("didn't expect error %v", err)
-			}
-			if string(b) != test.expected {
-				t.Fatalf("expected %s, received %s", test.expected, string(b))
-			}
-		})
-	}
-}
diff --git a/packages/sdk/go/internal/apijson/json_test.go b/packages/sdk/go/internal/apijson/json_test.go
deleted file mode 100644
index d4c628359..000000000
--- a/packages/sdk/go/internal/apijson/json_test.go
+++ /dev/null
@@ -1,617 +0,0 @@
-package apijson
-
-import (
-	"reflect"
-	"strings"
-	"testing"
-	"time"
-
-	"github.com/tidwall/gjson"
-)
-
-func P[T any](v T) *T { return &v }
-
-type Primitives struct {
-	A bool    `json:"a"`
-	B int     `json:"b"`
-	C uint    `json:"c"`
-	D float64 `json:"d"`
-	E float32 `json:"e"`
-	F []int   `json:"f"`
-}
-
-type PrimitivePointers struct {
-	A *bool    `json:"a"`
-	B *int     `json:"b"`
-	C *uint    `json:"c"`
-	D *float64 `json:"d"`
-	E *float32 `json:"e"`
-	F *[]int   `json:"f"`
-}
-
-type Slices struct {
-	Slice []Primitives `json:"slices"`
-}
-
-type DateTime struct {
-	Date     time.Time `json:"date" format:"date"`
-	DateTime time.Time `json:"date-time" format:"date-time"`
-}
-
-type AdditionalProperties struct {
-	A           bool                   `json:"a"`
-	ExtraFields map[string]interface{} `json:"-,extras"`
-}
-
-type TypedAdditionalProperties struct {
-	A           bool           `json:"a"`
-	ExtraFields map[string]int `json:"-,extras"`
-}
-
-type EmbeddedStruct struct {
-	A bool   `json:"a"`
-	B string `json:"b"`
-
-	JSON EmbeddedStructJSON
-}
-
-type EmbeddedStructJSON struct {
-	A           Field
-	B           Field
-	ExtraFields map[string]Field
-	raw         string
-}
-
-type EmbeddedStructs struct {
-	EmbeddedStruct
-	A           *int                   `json:"a"`
-	ExtraFields map[string]interface{} `json:"-,extras"`
-
-	JSON EmbeddedStructsJSON
-}
-
-type EmbeddedStructsJSON struct {
-	A           Field
-	ExtraFields map[string]Field
-	raw         string
-}
-
-type Recursive struct {
-	Name  string     `json:"name"`
-	Child *Recursive `json:"child"`
-}
-
-type JSONFieldStruct struct {
-	A           bool                `json:"a"`
-	B           int64               `json:"b"`
-	C           string              `json:"c"`
-	D           string              `json:"d"`
-	ExtraFields map[string]int64    `json:"-,extras"`
-	JSON        JSONFieldStructJSON `json:"-,metadata"`
-}
-
-type JSONFieldStructJSON struct {
-	A           Field
-	B           Field
-	C           Field
-	D           Field
-	ExtraFields map[string]Field
-	raw         string
-}
-
-type UnknownStruct struct {
-	Unknown interface{} `json:"unknown"`
-}
-
-type UnionStruct struct {
-	Union Union `json:"union" format:"date"`
-}
-
-type Union interface {
-	union()
-}
-
-type Inline struct {
-	InlineField Primitives `json:"-,inline"`
-	JSON        InlineJSON `json:"-,metadata"`
-}
-
-type InlineArray struct {
-	InlineField []string   `json:"-,inline"`
-	JSON        InlineJSON `json:"-,metadata"`
-}
-
-type InlineJSON struct {
-	InlineField Field
-	raw         string
-}
-
-type UnionInteger int64
-
-func (UnionInteger) union() {}
-
-type UnionStructA struct {
-	Type string `json:"type"`
-	A    string `json:"a"`
-	B    string `json:"b"`
-}
-
-func (UnionStructA) union() {}
-
-type UnionStructB struct {
-	Type string `json:"type"`
-	A    string `json:"a"`
-}
-
-func (UnionStructB) union() {}
-
-type UnionTime time.Time
-
-func (UnionTime) union() {}
-
-func init() {
-	RegisterUnion(reflect.TypeOf((*Union)(nil)).Elem(), "type",
-		UnionVariant{
-			TypeFilter: gjson.String,
-			Type:       reflect.TypeOf(UnionTime{}),
-		},
-		UnionVariant{
-			TypeFilter: gjson.Number,
-			Type:       reflect.TypeOf(UnionInteger(0)),
-		},
-		UnionVariant{
-			TypeFilter:         gjson.JSON,
-			DiscriminatorValue: "typeA",
-			Type:               reflect.TypeOf(UnionStructA{}),
-		},
-		UnionVariant{
-			TypeFilter:         gjson.JSON,
-			DiscriminatorValue: "typeB",
-			Type:               reflect.TypeOf(UnionStructB{}),
-		},
-	)
-}
-
-type ComplexUnionStruct struct {
-	Union ComplexUnion `json:"union"`
-}
-
-type ComplexUnion interface {
-	complexUnion()
-}
-
-type ComplexUnionA struct {
-	Boo string `json:"boo"`
-	Foo bool   `json:"foo"`
-}
-
-func (ComplexUnionA) complexUnion() {}
-
-type ComplexUnionB struct {
-	Boo bool   `json:"boo"`
-	Foo string `json:"foo"`
-}
-
-func (ComplexUnionB) complexUnion() {}
-
-type ComplexUnionC struct {
-	Boo int64 `json:"boo"`
-}
-
-func (ComplexUnionC) complexUnion() {}
-
-type ComplexUnionTypeA struct {
-	Baz  int64 `json:"baz"`
-	Type TypeA `json:"type"`
-}
-
-func (ComplexUnionTypeA) complexUnion() {}
-
-type TypeA string
-
-func (t TypeA) IsKnown() bool {
-	return t == "a"
-}
-
-type ComplexUnionTypeB struct {
-	Baz  int64 `json:"baz"`
-	Type TypeB `json:"type"`
-}
-
-type TypeB string
-
-func (t TypeB) IsKnown() bool {
-	return t == "b"
-}
-
-type UnmarshalStruct struct {
-	Foo  string `json:"foo"`
-	prop bool   `json:"-"`
-}
-
-func (r *UnmarshalStruct) UnmarshalJSON(json []byte) error {
-	r.prop = true
-	return UnmarshalRoot(json, r)
-}
-
-func (ComplexUnionTypeB) complexUnion() {}
-
-func init() {
-	RegisterUnion(reflect.TypeOf((*ComplexUnion)(nil)).Elem(), "",
-		UnionVariant{
-			TypeFilter: gjson.JSON,
-			Type:       reflect.TypeOf(ComplexUnionA{}),
-		},
-		UnionVariant{
-			TypeFilter: gjson.JSON,
-			Type:       reflect.TypeOf(ComplexUnionB{}),
-		},
-		UnionVariant{
-			TypeFilter: gjson.JSON,
-			Type:       reflect.TypeOf(ComplexUnionC{}),
-		},
-		UnionVariant{
-			TypeFilter: gjson.JSON,
-			Type:       reflect.TypeOf(ComplexUnionTypeA{}),
-		},
-		UnionVariant{
-			TypeFilter: gjson.JSON,
-			Type:       reflect.TypeOf(ComplexUnionTypeB{}),
-		},
-	)
-}
-
-type MarshallingUnionStruct struct {
-	Union MarshallingUnion
-}
-
-func (r *MarshallingUnionStruct) UnmarshalJSON(data []byte) (err error) {
-	*r = MarshallingUnionStruct{}
-	err = UnmarshalRoot(data, &r.Union)
-	return
-}
-
-func (r MarshallingUnionStruct) MarshalJSON() (data []byte, err error) {
-	return MarshalRoot(r.Union)
-}
-
-type MarshallingUnion interface {
-	marshallingUnion()
-}
-
-type MarshallingUnionA struct {
-	Boo string `json:"boo"`
-}
-
-func (MarshallingUnionA) marshallingUnion() {}
-
-func (r *MarshallingUnionA) UnmarshalJSON(data []byte) (err error) {
-	return UnmarshalRoot(data, r)
-}
-
-type MarshallingUnionB struct {
-	Foo string `json:"foo"`
-}
-
-func (MarshallingUnionB) marshallingUnion() {}
-
-func (r *MarshallingUnionB) UnmarshalJSON(data []byte) (err error) {
-	return UnmarshalRoot(data, r)
-}
-
-func init() {
-	RegisterUnion(
-		reflect.TypeOf((*MarshallingUnion)(nil)).Elem(),
-		"",
-		UnionVariant{
-			TypeFilter: gjson.JSON,
-			Type:       reflect.TypeOf(MarshallingUnionA{}),
-		},
-		UnionVariant{
-			TypeFilter: gjson.JSON,
-			Type:       reflect.TypeOf(MarshallingUnionB{}),
-		},
-	)
-}
-
-var tests = map[string]struct {
-	buf string
-	val interface{}
-}{
-	"true":               {"true", true},
-	"false":              {"false", false},
-	"int":                {"1", 1},
-	"int_bigger":         {"12324", 12324},
-	"int_string_coerce":  {`"65"`, 65},
-	"int_boolean_coerce": {"true", 1},
-	"int64":              {"1", int64(1)},
-	"int64_huge":         {"123456789123456789", int64(123456789123456789)},
-	"uint":               {"1", uint(1)},
-	"uint_bigger":        {"12324", uint(12324)},
-	"uint_coerce":        {`"65"`, uint(65)},
-	"float_1.54":         {"1.54", float32(1.54)},
-	"float_1.89":         {"1.89", float64(1.89)},
-	"string":             {`"str"`, "str"},
-	"string_int_coerce":  {`12`, "12"},
-	"array_string":       {`["foo","bar"]`, []string{"foo", "bar"}},
-	"array_int":          {`[1,2]`, []int{1, 2}},
-	"array_int_coerce":   {`["1",2]`, []int{1, 2}},
-
-	"ptr_true":               {"true", P(true)},
-	"ptr_false":              {"false", P(false)},
-	"ptr_int":                {"1", P(1)},
-	"ptr_int_bigger":         {"12324", P(12324)},
-	"ptr_int_string_coerce":  {`"65"`, P(65)},
-	"ptr_int_boolean_coerce": {"true", P(1)},
-	"ptr_int64":              {"1", P(int64(1))},
-	"ptr_int64_huge":         {"123456789123456789", P(int64(123456789123456789))},
-	"ptr_uint":               {"1", P(uint(1))},
-	"ptr_uint_bigger":        {"12324", P(uint(12324))},
-	"ptr_uint_coerce":        {`"65"`, P(uint(65))},
-	"ptr_float_1.54":         {"1.54", P(float32(1.54))},
-	"ptr_float_1.89":         {"1.89", P(float64(1.89))},
-
-	"date_time":             {`"2007-03-01T13:00:00Z"`, time.Date(2007, time.March, 1, 13, 0, 0, 0, time.UTC)},
-	"date_time_nano_coerce": {`"2007-03-01T13:03:05.123456789Z"`, time.Date(2007, time.March, 1, 13, 3, 5, 123456789, time.UTC)},
-
-	"date_time_missing_t_coerce":        {`"2007-03-01 13:03:05Z"`, time.Date(2007, time.March, 1, 13, 3, 5, 0, time.UTC)},
-	"date_time_missing_timezone_coerce": {`"2007-03-01T13:03:05"`, time.Date(2007, time.March, 1, 13, 3, 5, 0, time.UTC)},
-	// note: using -1200 to minimize probability of conflicting with the local timezone of the test runner
-	// see https://en.wikipedia.org/wiki/UTC%E2%88%9212:00
-	"date_time_missing_timezone_colon_coerce": {`"2007-03-01T13:03:05-1200"`, time.Date(2007, time.March, 1, 13, 3, 5, 0, time.FixedZone("", -12*60*60))},
-	"date_time_nano_missing_t_coerce":         {`"2007-03-01 13:03:05.123456789Z"`, time.Date(2007, time.March, 1, 13, 3, 5, 123456789, time.UTC)},
-
-	"map_string":                       {`{"foo":"bar"}`, map[string]string{"foo": "bar"}},
-	"map_string_with_sjson_path_chars": {`{":a.b.c*:d*-1e.f@g?h":"bar"}`, map[string]string{":a.b.c*:d*-1e.f@g?h": "bar"}},
-	"map_interface":                    {`{"a":1,"b":"str","c":false}`, map[string]interface{}{"a": float64(1), "b": "str", "c": false}},
-
-	"primitive_struct": {
-		`{"a":false,"b":237628372683,"c":654,"d":9999.43,"e":43.76,"f":[1,2,3,4]}`,
-		Primitives{A: false, B: 237628372683, C: uint(654), D: 9999.43, E: 43.76, F: []int{1, 2, 3, 4}},
-	},
-
-	"slices": {
-		`{"slices":[{"a":false,"b":237628372683,"c":654,"d":9999.43,"e":43.76,"f":[1,2,3,4]}]}`,
-		Slices{
-			Slice: []Primitives{{A: false, B: 237628372683, C: uint(654), D: 9999.43, E: 43.76, F: []int{1, 2, 3, 4}}},
-		},
-	},
-
-	"primitive_pointer_struct": {
-		`{"a":false,"b":237628372683,"c":654,"d":9999.43,"e":43.76,"f":[1,2,3,4,5]}`,
-		PrimitivePointers{
-			A: P(false),
-			B: P(237628372683),
-			C: P(uint(654)),
-			D: P(9999.43),
-			E: P(float32(43.76)),
-			F: &[]int{1, 2, 3, 4, 5},
-		},
-	},
-
-	"datetime_struct": {
-		`{"date":"2006-01-02","date-time":"2006-01-02T15:04:05Z"}`,
-		DateTime{
-			Date:     time.Date(2006, time.January, 2, 0, 0, 0, 0, time.UTC),
-			DateTime: time.Date(2006, time.January, 2, 15, 4, 5, 0, time.UTC),
-		},
-	},
-
-	"additional_properties": {
-		`{"a":true,"bar":"value","foo":true}`,
-		AdditionalProperties{
-			A: true,
-			ExtraFields: map[string]interface{}{
-				"bar": "value",
-				"foo": true,
-			},
-		},
-	},
-
-	"embedded_struct": {
-		`{"a":1,"b":"bar"}`,
-		EmbeddedStructs{
-			EmbeddedStruct: EmbeddedStruct{
-				A: true,
-				B: "bar",
-				JSON: EmbeddedStructJSON{
-					A:   Field{raw: `1`, status: valid},
-					B:   Field{raw: `"bar"`, status: valid},
-					raw: `{"a":1,"b":"bar"}`,
-				},
-			},
-			A:           P(1),
-			ExtraFields: map[string]interface{}{"b": "bar"},
-			JSON: EmbeddedStructsJSON{
-				A: Field{raw: `1`, status: valid},
-				ExtraFields: map[string]Field{
-					"b": {raw: `"bar"`, status: valid},
-				},
-				raw: `{"a":1,"b":"bar"}`,
-			},
-		},
-	},
-
-	"recursive_struct": {
-		`{"child":{"name":"Alex"},"name":"Robert"}`,
-		Recursive{Name: "Robert", Child: &Recursive{Name: "Alex"}},
-	},
-
-	"metadata_coerce": {
-		`{"a":"12","b":"12","c":null,"extra_typed":12,"extra_untyped":{"foo":"bar"}}`,
-		JSONFieldStruct{
-			A: false,
-			B: 12,
-			C: "",
-			JSON: JSONFieldStructJSON{
-				raw: `{"a":"12","b":"12","c":null,"extra_typed":12,"extra_untyped":{"foo":"bar"}}`,
-				A:   Field{raw: `"12"`, status: invalid},
-				B:   Field{raw: `"12"`, status: valid},
-				C:   Field{raw: "null", status: null},
-				D:   Field{raw: "", status: missing},
-				ExtraFields: map[string]Field{
-					"extra_typed": {
-						raw:    "12",
-						status: valid,
-					},
-					"extra_untyped": {
-						raw:    `{"foo":"bar"}`,
-						status: invalid,
-					},
-				},
-			},
-			ExtraFields: map[string]int64{
-				"extra_typed":   12,
-				"extra_untyped": 0,
-			},
-		},
-	},
-
-	"unknown_struct_number": {
-		`{"unknown":12}`,
-		UnknownStruct{
-			Unknown: 12.,
-		},
-	},
-
-	"unknown_struct_map": {
-		`{"unknown":{"foo":"bar"}}`,
-		UnknownStruct{
-			Unknown: map[string]interface{}{
-				"foo": "bar",
-			},
-		},
-	},
-
-	"union_integer": {
-		`{"union":12}`,
-		UnionStruct{
-			Union: UnionInteger(12),
-		},
-	},
-
-	"union_struct_discriminated_a": {
-		`{"union":{"a":"foo","b":"bar","type":"typeA"}}`,
-		UnionStruct{
-			Union: UnionStructA{
-				Type: "typeA",
-				A:    "foo",
-				B:    "bar",
-			},
-		},
-	},
-
-	"union_struct_discriminated_b": {
-		`{"union":{"a":"foo","type":"typeB"}}`,
-		UnionStruct{
-			Union: UnionStructB{
-				Type: "typeB",
-				A:    "foo",
-			},
-		},
-	},
-
-	"union_struct_time": {
-		`{"union":"2010-05-23"}`,
-		UnionStruct{
-			Union: UnionTime(time.Date(2010, 05, 23, 0, 0, 0, 0, time.UTC)),
-		},
-	},
-
-	"complex_union_a": {
-		`{"union":{"boo":"12","foo":true}}`,
-		ComplexUnionStruct{Union: ComplexUnionA{Boo: "12", Foo: true}},
-	},
-
-	"complex_union_b": {
-		`{"union":{"boo":true,"foo":"12"}}`,
-		ComplexUnionStruct{Union: ComplexUnionB{Boo: true, Foo: "12"}},
-	},
-
-	"complex_union_c": {
-		`{"union":{"boo":12}}`,
-		ComplexUnionStruct{Union: ComplexUnionC{Boo: 12}},
-	},
-
-	"complex_union_type_a": {
-		`{"union":{"baz":12,"type":"a"}}`,
-		ComplexUnionStruct{Union: ComplexUnionTypeA{Baz: 12, Type: TypeA("a")}},
-	},
-
-	"complex_union_type_b": {
-		`{"union":{"baz":12,"type":"b"}}`,
-		ComplexUnionStruct{Union: ComplexUnionTypeB{Baz: 12, Type: TypeB("b")}},
-	},
-
-	"marshalling_union_a": {
-		`{"boo":"hello"}`,
-		MarshallingUnionStruct{Union: MarshallingUnionA{Boo: "hello"}},
-	},
-	"marshalling_union_b": {
-		`{"foo":"hi"}`,
-		MarshallingUnionStruct{Union: MarshallingUnionB{Foo: "hi"}},
-	},
-
-	"unmarshal": {
-		`{"foo":"hello"}`,
-		&UnmarshalStruct{Foo: "hello", prop: true},
-	},
-
-	"array_of_unmarshal": {
-		`[{"foo":"hello"}]`,
-		[]UnmarshalStruct{{Foo: "hello", prop: true}},
-	},
-
-	"inline_coerce": {
-		`{"a":false,"b":237628372683,"c":654,"d":9999.43,"e":43.76,"f":[1,2,3,4]}`,
-		Inline{
-			InlineField: Primitives{A: false, B: 237628372683, C: 0x28e, D: 9999.43, E: 43.76, F: []int{1, 2, 3, 4}},
-			JSON: InlineJSON{
-				InlineField: Field{raw: "{\"a\":false,\"b\":237628372683,\"c\":654,\"d\":9999.43,\"e\":43.76,\"f\":[1,2,3,4]}", status: 3},
-				raw:         "{\"a\":false,\"b\":237628372683,\"c\":654,\"d\":9999.43,\"e\":43.76,\"f\":[1,2,3,4]}",
-			},
-		},
-	},
-
-	"inline_array_coerce": {
-		`["Hello","foo","bar"]`,
-		InlineArray{
-			InlineField: []string{"Hello", "foo", "bar"},
-			JSON: InlineJSON{
-				InlineField: Field{raw: `["Hello","foo","bar"]`, status: 3},
-				raw:         `["Hello","foo","bar"]`,
-			},
-		},
-	},
-}
-
-func TestDecode(t *testing.T) {
-	for name, test := range tests {
-		t.Run(name, func(t *testing.T) {
-			result := reflect.New(reflect.TypeOf(test.val))
-			if err := Unmarshal([]byte(test.buf), result.Interface()); err != nil {
-				t.Fatalf("deserialization of %v failed with error %v", result, err)
-			}
-			if !reflect.DeepEqual(result.Elem().Interface(), test.val) {
-				t.Fatalf("expected '%s' to deserialize to \n%#v\nbut got\n%#v", test.buf, test.val, result.Elem().Interface())
-			}
-		})
-	}
-}
-
-func TestEncode(t *testing.T) {
-	for name, test := range tests {
-		if strings.HasSuffix(name, "_coerce") {
-			continue
-		}
-		t.Run(name, func(t *testing.T) {
-			raw, err := Marshal(test.val)
-			if err != nil {
-				t.Fatalf("serialization of %v failed with error %v", test.val, err)
-			}
-			if string(raw) != test.buf {
-				t.Fatalf("expected %+#v to serialize to %s but got %s", test.val, test.buf, string(raw))
-			}
-		})
-	}
-}
diff --git a/packages/sdk/go/internal/apijson/port.go b/packages/sdk/go/internal/apijson/port.go
deleted file mode 100644
index 502ab7780..000000000
--- a/packages/sdk/go/internal/apijson/port.go
+++ /dev/null
@@ -1,120 +0,0 @@
-package apijson
-
-import (
-	"fmt"
-	"reflect"
-)
-
-// Port copies over values from one struct to another struct.
-func Port(from any, to any) error {
-	toVal := reflect.ValueOf(to)
-	fromVal := reflect.ValueOf(from)
-
-	if toVal.Kind() != reflect.Ptr || toVal.IsNil() {
-		return fmt.Errorf("destination must be a non-nil pointer")
-	}
-
-	for toVal.Kind() == reflect.Ptr {
-		toVal = toVal.Elem()
-	}
-	toType := toVal.Type()
-
-	for fromVal.Kind() == reflect.Ptr {
-		fromVal = fromVal.Elem()
-	}
-	fromType := fromVal.Type()
-
-	if toType.Kind() != reflect.Struct {
-		return fmt.Errorf("destination must be a non-nil pointer to a struct (%v %v)", toType, toType.Kind())
-	}
-
-	values := map[string]reflect.Value{}
-	fields := map[string]reflect.Value{}
-
-	fromJSON := fromVal.FieldByName("JSON")
-	toJSON := toVal.FieldByName("JSON")
-
-	// Iterate through the fields of v and load all the "normal" fields in the struct to the map of
-	// string to reflect.Value, as well as their raw .JSON.Foo counterpart indicated by j.
-	var getFields func(t reflect.Type, v reflect.Value)
-	getFields = func(t reflect.Type, v reflect.Value) {
-		j := v.FieldByName("JSON")
-
-		// Recurse into anonymous fields first, since the fields on the object should win over the fields in the
-		// embedded object.
-		for i := 0; i < t.NumField(); i++ {
-			field := t.Field(i)
-			if field.Anonymous {
-				getFields(field.Type, v.Field(i))
-				continue
-			}
-		}
-
-		for i := 0; i < t.NumField(); i++ {
-			field := t.Field(i)
-			ptag, ok := parseJSONStructTag(field)
-			if !ok || ptag.name == "-" {
-				continue
-			}
-			values[ptag.name] = v.Field(i)
-			if j.IsValid() {
-				fields[ptag.name] = j.FieldByName(field.Name)
-			}
-		}
-	}
-	getFields(fromType, fromVal)
-
-	// Use the values from the previous step to populate the 'to' struct.
-	for i := 0; i < toType.NumField(); i++ {
-		field := toType.Field(i)
-		ptag, ok := parseJSONStructTag(field)
-		if !ok {
-			continue
-		}
-		if ptag.name == "-" {
-			continue
-		}
-		if value, ok := values[ptag.name]; ok {
-			delete(values, ptag.name)
-			if field.Type.Kind() == reflect.Interface {
-				toVal.Field(i).Set(value)
-			} else {
-				switch value.Kind() {
-				case reflect.String:
-					toVal.Field(i).SetString(value.String())
-				case reflect.Bool:
-					toVal.Field(i).SetBool(value.Bool())
-				case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
-					toVal.Field(i).SetInt(value.Int())
-				case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
-					toVal.Field(i).SetUint(value.Uint())
-				case reflect.Float32, reflect.Float64:
-					toVal.Field(i).SetFloat(value.Float())
-				default:
-					toVal.Field(i).Set(value)
-				}
-			}
-		}
-
-		if fromJSONField, ok := fields[ptag.name]; ok {
-			if toJSONField := toJSON.FieldByName(field.Name); toJSONField.IsValid() {
-				toJSONField.Set(fromJSONField)
-			}
-		}
-	}
-
-	// Finally, copy over the .JSON.raw and .JSON.ExtraFields
-	if toJSON.IsValid() {
-		if raw := toJSON.FieldByName("raw"); raw.IsValid() {
-			setUnexportedField(raw, fromJSON.Interface().(interface{ RawJSON() string }).RawJSON())
-		}
-
-		if toExtraFields := toJSON.FieldByName("ExtraFields"); toExtraFields.IsValid() {
-			if fromExtraFields := fromJSON.FieldByName("ExtraFields"); fromExtraFields.IsValid() {
-				setUnexportedField(toExtraFields, fromExtraFields.Interface())
-			}
-		}
-	}
-
-	return nil
-}
diff --git a/packages/sdk/go/internal/apijson/port_test.go b/packages/sdk/go/internal/apijson/port_test.go
deleted file mode 100644
index 115405335..000000000
--- a/packages/sdk/go/internal/apijson/port_test.go
+++ /dev/null
@@ -1,257 +0,0 @@
-package apijson
-
-import (
-	"reflect"
-	"testing"
-)
-
-type Metadata struct {
-	CreatedAt string `json:"created_at"`
-}
-
-// Card is the "combined" type of CardVisa and CardMastercard
-type Card struct {
-	Processor CardProcessor `json:"processor"`
-	Data      any           `json:"data"`
-	IsFoo     bool          `json:"is_foo"`
-	IsBar     bool          `json:"is_bar"`
-	Metadata  Metadata      `json:"metadata"`
-	Value     interface{}   `json:"value"`
-
-	JSON cardJSON
-}
-
-type cardJSON struct {
-	Processor   Field
-	Data        Field
-	IsFoo       Field
-	IsBar       Field
-	Metadata    Field
-	Value       Field
-	ExtraFields map[string]Field
-	raw         string
-}
-
-func (r cardJSON) RawJSON() string { return r.raw }
-
-type CardProcessor string
-
-// CardVisa
-type CardVisa struct {
-	Processor CardVisaProcessor `json:"processor"`
-	Data      CardVisaData      `json:"data"`
-	IsFoo     bool              `json:"is_foo"`
-	Metadata  Metadata          `json:"metadata"`
-	Value     string            `json:"value"`
-
-	JSON cardVisaJSON
-}
-
-type cardVisaJSON struct {
-	Processor   Field
-	Data        Field
-	IsFoo       Field
-	Metadata    Field
-	Value       Field
-	ExtraFields map[string]Field
-	raw         string
-}
-
-func (r cardVisaJSON) RawJSON() string { return r.raw }
-
-type CardVisaProcessor string
-
-type CardVisaData struct {
-	Foo string `json:"foo"`
-}
-
-// CardMastercard
-type CardMastercard struct {
-	Processor CardMastercardProcessor `json:"processor"`
-	Data      CardMastercardData      `json:"data"`
-	IsBar     bool                    `json:"is_bar"`
-	Metadata  Metadata                `json:"metadata"`
-	Value     bool                    `json:"value"`
-
-	JSON cardMastercardJSON
-}
-
-type cardMastercardJSON struct {
-	Processor   Field
-	Data        Field
-	IsBar       Field
-	Metadata    Field
-	Value       Field
-	ExtraFields map[string]Field
-	raw         string
-}
-
-func (r cardMastercardJSON) RawJSON() string { return r.raw }
-
-type CardMastercardProcessor string
-
-type CardMastercardData struct {
-	Bar int64 `json:"bar"`
-}
-
-type CommonFields struct {
-	Metadata Metadata `json:"metadata"`
-	Value    string   `json:"value"`
-
-	JSON commonFieldsJSON
-}
-
-type commonFieldsJSON struct {
-	Metadata    Field
-	Value       Field
-	ExtraFields map[string]Field
-	raw         string
-}
-
-type CardEmbedded struct {
-	CommonFields
-	Processor CardVisaProcessor `json:"processor"`
-	Data      CardVisaData      `json:"data"`
-	IsFoo     bool              `json:"is_foo"`
-
-	JSON cardEmbeddedJSON
-}
-
-type cardEmbeddedJSON struct {
-	Processor   Field
-	Data        Field
-	IsFoo       Field
-	ExtraFields map[string]Field
-	raw         string
-}
-
-func (r cardEmbeddedJSON) RawJSON() string { return r.raw }
-
-var portTests = map[string]struct {
-	from any
-	to   any
-}{
-	"visa to card": {
-		CardVisa{
-			Processor: "visa",
-			IsFoo:     true,
-			Data: CardVisaData{
-				Foo: "foo",
-			},
-			Metadata: Metadata{
-				CreatedAt: "Mar 29 2024",
-			},
-			Value: "value",
-			JSON: cardVisaJSON{
-				raw:         `{"processor":"visa","is_foo":true,"data":{"foo":"foo"}}`,
-				Processor:   Field{raw: `"visa"`, status: valid},
-				IsFoo:       Field{raw: `true`, status: valid},
-				Data:        Field{raw: `{"foo":"foo"}`, status: valid},
-				Value:       Field{raw: `"value"`, status: valid},
-				ExtraFields: map[string]Field{"extra": {raw: `"yo"`, status: valid}},
-			},
-		},
-		Card{
-			Processor: "visa",
-			IsFoo:     true,
-			IsBar:     false,
-			Data: CardVisaData{
-				Foo: "foo",
-			},
-			Metadata: Metadata{
-				CreatedAt: "Mar 29 2024",
-			},
-			Value: "value",
-			JSON: cardJSON{
-				raw:         `{"processor":"visa","is_foo":true,"data":{"foo":"foo"}}`,
-				Processor:   Field{raw: `"visa"`, status: valid},
-				IsFoo:       Field{raw: `true`, status: valid},
-				Data:        Field{raw: `{"foo":"foo"}`, status: valid},
-				Value:       Field{raw: `"value"`, status: valid},
-				ExtraFields: map[string]Field{"extra": {raw: `"yo"`, status: valid}},
-			},
-		},
-	},
-	"mastercard to card": {
-		CardMastercard{
-			Processor: "mastercard",
-			IsBar:     true,
-			Data: CardMastercardData{
-				Bar: 13,
-			},
-			Value: false,
-		},
-		Card{
-			Processor: "mastercard",
-			IsFoo:     false,
-			IsBar:     true,
-			Data: CardMastercardData{
-				Bar: 13,
-			},
-			Value: false,
-		},
-	},
-	"embedded to card": {
-		CardEmbedded{
-			CommonFields: CommonFields{
-				Metadata: Metadata{
-					CreatedAt: "Mar 29 2024",
-				},
-				Value: "embedded_value",
-				JSON: commonFieldsJSON{
-					Metadata: Field{raw: `{"created_at":"Mar 29 2024"}`, status: valid},
-					Value:    Field{raw: `"embedded_value"`, status: valid},
-					raw:      `should not matter`,
-				},
-			},
-			Processor: "visa",
-			IsFoo:     true,
-			Data: CardVisaData{
-				Foo: "embedded_foo",
-			},
-			JSON: cardEmbeddedJSON{
-				raw:       `{"processor":"visa","is_foo":true,"data":{"foo":"embedded_foo"},"metadata":{"created_at":"Mar 29 2024"},"value":"embedded_value"}`,
-				Processor: Field{raw: `"visa"`, status: valid},
-				IsFoo:     Field{raw: `true`, status: valid},
-				Data:      Field{raw: `{"foo":"embedded_foo"}`, status: valid},
-			},
-		},
-		Card{
-			Processor: "visa",
-			IsFoo:     true,
-			IsBar:     false,
-			Data: CardVisaData{
-				Foo: "embedded_foo",
-			},
-			Metadata: Metadata{
-				CreatedAt: "Mar 29 2024",
-			},
-			Value: "embedded_value",
-			JSON: cardJSON{
-				raw:       `{"processor":"visa","is_foo":true,"data":{"foo":"embedded_foo"},"metadata":{"created_at":"Mar 29 2024"},"value":"embedded_value"}`,
-				Processor: Field{raw: `"visa"`, status: 0x3},
-				IsFoo:     Field{raw: "true", status: 0x3},
-				Data:      Field{raw: `{"foo":"embedded_foo"}`, status: 0x3},
-				Metadata:  Field{raw: `{"created_at":"Mar 29 2024"}`, status: 0x3},
-				Value:     Field{raw: `"embedded_value"`, status: 0x3},
-			},
-		},
-	},
-}
-
-func TestPort(t *testing.T) {
-	for name, test := range portTests {
-		t.Run(name, func(t *testing.T) {
-			toVal := reflect.New(reflect.TypeOf(test.to))
-
-			err := Port(test.from, toVal.Interface())
-			if err != nil {
-				t.Fatalf("port of %v failed with error %v", test.from, err)
-			}
-
-			if !reflect.DeepEqual(toVal.Elem().Interface(), test.to) {
-				t.Fatalf("expected:\n%+#v\n\nto port to:\n%+#v\n\nbut got:\n%+#v", test.from, test.to, toVal.Elem().Interface())
-			}
-		})
-	}
-}
diff --git a/packages/sdk/go/internal/apijson/registry.go b/packages/sdk/go/internal/apijson/registry.go
deleted file mode 100644
index 119cc5ff8..000000000
--- a/packages/sdk/go/internal/apijson/registry.go
+++ /dev/null
@@ -1,41 +0,0 @@
-package apijson
-
-import (
-	"reflect"
-
-	"github.com/tidwall/gjson"
-)
-
-type UnionVariant struct {
-	TypeFilter         gjson.Type
-	DiscriminatorValue interface{}
-	Type               reflect.Type
-}
-
-var unionRegistry = map[reflect.Type]unionEntry{}
-var unionVariants = map[reflect.Type]interface{}{}
-
-type unionEntry struct {
-	discriminatorKey string
-	variants         []UnionVariant
-}
-
-func RegisterUnion(typ reflect.Type, discriminator string, variants ...UnionVariant) {
-	unionRegistry[typ] = unionEntry{
-		discriminatorKey: discriminator,
-		variants:         variants,
-	}
-	for _, variant := range variants {
-		unionVariants[variant.Type] = typ
-	}
-}
-
-// Useful to wrap a union type to force it to use [apijson.UnmarshalJSON] since you cannot define an
-// UnmarshalJSON function on the interface itself.
-type UnionUnmarshaler[T any] struct {
-	Value T
-}
-
-func (c *UnionUnmarshaler[T]) UnmarshalJSON(buf []byte) error {
-	return UnmarshalRoot(buf, &c.Value)
-}
diff --git a/packages/sdk/go/internal/apijson/tag.go b/packages/sdk/go/internal/apijson/tag.go
deleted file mode 100644
index 812fb3caf..000000000
--- a/packages/sdk/go/internal/apijson/tag.go
+++ /dev/null
@@ -1,47 +0,0 @@
-package apijson
-
-import (
-	"reflect"
-	"strings"
-)
-
-const jsonStructTag = "json"
-const formatStructTag = "format"
-
-type parsedStructTag struct {
-	name     string
-	required bool
-	extras   bool
-	metadata bool
-	inline   bool
-}
-
-func parseJSONStructTag(field reflect.StructField) (tag parsedStructTag, ok bool) {
-	raw, ok := field.Tag.Lookup(jsonStructTag)
-	if !ok {
-		return
-	}
-	parts := strings.Split(raw, ",")
-	if len(parts) == 0 {
-		return tag, false
-	}
-	tag.name = parts[0]
-	for _, part := range parts[1:] {
-		switch part {
-		case "required":
-			tag.required = true
-		case "extras":
-			tag.extras = true
-		case "metadata":
-			tag.metadata = true
-		case "inline":
-			tag.inline = true
-		}
-	}
-	return
-}
-
-func parseFormatStructTag(field reflect.StructField) (format string, ok bool) {
-	format, ok = field.Tag.Lookup(formatStructTag)
-	return
-}