chore: update Messages and Responses with internal runtime helpers

arkruntime/internal/ogenjson/time.go

@@ -0,0 +1,29 @@
+// Copyright (c) 2026 ByteDance Ltd. and/or its affiliates.
+// SPDX-License-Identifier: Apache-2.0
+
+// Package json provides the ogen date-time codecs used by generated models
+// without importing the ogen module (whose Go floor exceeds this SDK's).
+package json
+
+import (
+	"time"
+
+	"github.com/go-faster/jx"
+)
+
+// DecodeDateTime decodes an RFC3339 string, preserving fractional seconds and
+// offsets accepted by time.Parse, matching ogen v1.20.3.
+func DecodeDateTime(d *jx.Decoder) (time.Time, error) {
+	s, err := d.Str()
+	if err != nil {
+		return time.Time{}, err
+	}
+	return time.Parse(time.RFC3339, s)
+}
+
+// EncodeDateTime uses RFC3339, intentionally omitting fractional seconds like
+// ogen v1.20.3. Use of RFC3339Nano would change the generated wire format.
+func EncodeDateTime(e *jx.Encoder, v time.Time) {
+	var buf [64]byte
+	e.ByteStr(v.AppendFormat(buf[:0], time.RFC3339))
+}

arkruntime/internal/ogenjson/time_test.go

@@ -0,0 +1,47 @@
+// Copyright (c) 2026 ByteDance Ltd. and/or its affiliates.
+// SPDX-License-Identifier: Apache-2.0
+
+package json
+
+import (
+	"testing"
+	"time"
+
+	"github.com/go-faster/jx"
+)
+
+func TestDateTimeWireFormat(t *testing.T) {
+	for _, tc := range []struct{ input, output string }{
+		{`"2026-09-28T10:20:30Z"`, `"2026-09-28T10:20:30Z"`},
+		{`"2026-09-28T10:20:30.123456789+08:00"`, `"2026-09-28T10:20:30+08:00"`},
+		{`"2026-09-28T10:20:30-05:30"`, `"2026-09-28T10:20:30-05:30"`},
+		{`"0001-01-01T00:00:00Z"`, `"0001-01-01T00:00:00Z"`},
+	} {
+		t.Run(tc.input, func(t *testing.T) {
+			got, err := DecodeDateTime(jx.DecodeStr(tc.input))
+			if err != nil {
+				t.Fatal(err)
+			}
+			want, err := time.Parse(time.RFC3339, tc.input[1:len(tc.input)-1])
+			if err != nil || !got.Equal(want) || got.Nanosecond() != want.Nanosecond() {
+				t.Fatalf("decoded %v, want %v: %v", got, want, err)
+			}
+			e := jx.GetEncoder()
+			defer jx.PutEncoder(e)
+			EncodeDateTime(e, got)
+			if e.String() != tc.output {
+				t.Fatalf("encoded %s, want %s", e.String(), tc.output)
+			}
+		})
+	}
+}
+
+func TestDateTimeRejectsInvalidValues(t *testing.T) {
+	for _, input := range []string{`null`, `123`, `{}`, `[]`, `""`, `"2026-09-28"`, `"2026-02-30T10:20:30Z"`, `"2026-09-28T10:20:30"`, `"unterminated`} {
+		t.Run(input, func(t *testing.T) {
+			if _, err := DecodeDateTime(jx.DecodeStr(input)); err == nil {
+				t.Fatal("expected decode error")
+			}
+		})
+	}
+}

arkruntime/internal/ogenregex/convert.go

@@ -2,7 +2,6 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 // Adapted from github.com/ogen-go/ogen v1.20.3 (Apache-2.0).
-// See ../validate/README.md for provenance.
 
 package ogenregex
 

arkruntime/internal/ogenregex/ogenregex.go

@@ -2,7 +2,6 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 // Adapted from github.com/ogen-go/ogen v1.20.3 (Apache-2.0).
-// See ../validate/README.md for provenance.
 
 // Package ogenregex provides an interface to the regex engine.
 //

arkruntime/internal/validate/array.go

@@ -2,7 +2,6 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 // Adapted from github.com/ogen-go/ogen v1.20.3 (Apache-2.0).
-// See README.md for provenance and compatibility scope.
 
 package validate
 

arkruntime/internal/validate/constraints_errors.go

@@ -2,7 +2,6 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 // Adapted from github.com/ogen-go/ogen v1.20.3 (Apache-2.0).
-// See README.md for provenance and compatibility scope.
 
 package validate
 

arkruntime/internal/validate/float.go

@@ -2,7 +2,6 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 // Adapted from github.com/ogen-go/ogen v1.20.3 (Apache-2.0).
-// See README.md for provenance and compatibility scope.
 
 package validate
 

arkruntime/internal/validate/int.go

@@ -2,7 +2,6 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 // Adapted from github.com/ogen-go/ogen v1.20.3 (Apache-2.0).
-// See README.md for provenance and compatibility scope.
 
 package validate
 

arkruntime/internal/validate/object.go

@@ -0,0 +1,62 @@
+// Copyright (c) 2026 ByteDance Ltd. and/or its affiliates.
+// SPDX-License-Identifier: Apache-2.0
+//
+// Adapted from github.com/ogen-go/ogen v1.20.3 (Apache-2.0).
+
+package validate
+
+import "github.com/go-faster/errors"
+
+// Object validates map length.
+type Object struct {
+	MinProperties    int
+	MinPropertiesSet bool
+	MaxProperties    int
+	MaxPropertiesSet bool
+	// TODO: add validate to gen
+	MinLength    int
+	MinLengthSet bool
+	MaxLength    int
+	MaxLengthSet bool
+}
+
+// SetMinProperties sets MinProperties validation.
+func (o *Object) SetMinProperties(v int) {
+	o.MinPropertiesSet = true
+	o.MinProperties = v
+}
+
+// SetMaxProperties sets MaxProperties validation.
+func (o *Object) SetMaxProperties(v int) {
+	o.MaxPropertiesSet = true
+	o.MaxProperties = v
+}
+
+// SetMinLength sets MinLength validation.
+func (o *Object) SetMinLength(v int) {
+	o.MinLengthSet = true
+	o.MinLength = v
+}
+
+// SetMaxLength sets MaxLength validation.
+func (o *Object) SetMaxLength(v int) {
+	o.MaxLengthSet = true
+	o.MaxLength = v
+}
+
+// Set reports whether any validations are set.
+func (o Object) Set() bool {
+	return o.MaxPropertiesSet || o.MinPropertiesSet
+}
+
+// ValidateProperties returns error if object length (properties number) v is invalid.
+func (o Object) ValidateProperties(v int) error {
+	if o.MaxPropertiesSet && v > o.MaxProperties {
+		return errors.Errorf("object properties number %d greater than maximum %d", v, o.MaxProperties)
+	}
+	if o.MinPropertiesSet && v < o.MinProperties {
+		return errors.Errorf("object properties number %d less than minimum %d", v, o.MinProperties)
+	}
+
+	return nil
+}

arkruntime/internal/validate/object_test.go

@@ -0,0 +1,32 @@
+// Copyright (c) 2026 ByteDance Ltd. and/or its affiliates.
+// SPDX-License-Identifier: Apache-2.0
+package validate
+
+import "testing"
+
+func TestObjectPropertyBounds(t *testing.T) {
+	var v Object
+	if v.Set() || v.ValidateProperties(100) != nil {
+		t.Fatal("unset object should be unconstrained")
+	}
+	v.SetMinProperties(1)
+	v.SetMaxProperties(16)
+	if !v.Set() {
+		t.Fatal("bounds not set")
+	}
+	for _, n := range []int{1, 16} {
+		if err := v.ValidateProperties(n); err != nil {
+			t.Fatal(err)
+		}
+	}
+	for _, n := range []int{0, 17} {
+		if v.ValidateProperties(n) == nil {
+			t.Fatalf("accepted %d properties", n)
+		}
+	}
+	v.SetMaxProperties(0)
+	v.MinPropertiesSet = false
+	if v.ValidateProperties(0) != nil || v.ValidateProperties(1) == nil {
+		t.Fatal("zero maximum must be enforced")
+	}
+}

arkruntime/internal/validate/string.go

@@ -2,7 +2,6 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 // Adapted from github.com/ogen-go/ogen v1.20.3 (Apache-2.0).
-// See README.md for provenance and compatibility scope.
 
 package validate