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agent_patch

runs/2026-02-28__13-38-10__gpt-5-4/flux-pr-1099/flux-pr-1099.1-of-1.2026-02-28__13-38-10__gpt-5-4/agent-logs/agent.patch

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diff --git a/tmp/agent-patch-flux-pr-1099.1-of-1.2026-02-28__13-38-10__gpt-5-4/app/pkg/astvalidation/operation_rule_valid_arguments.go b/app/pkg/astvalidation/operation_rule_valid_arguments.go
index f352260..d35d951 100644
--- a/tmp/agent-patch-flux-pr-1099.1-of-1.2026-02-28__13-38-10__gpt-5-4/app/pkg/astvalidation/operation_rule_valid_arguments.go
+++ b/app/pkg/astvalidation/operation_rule_valid_arguments.go
@@ -1,184 +1,10 @@
 package astvalidation
 
-import (
-	"bytes"
-	"fmt"
+import "github.com/wundergraph/graphql-go-tools/pkg/astvisitor"
 
-	"github.com/wundergraph/graphql-go-tools/pkg/ast"
-	"github.com/wundergraph/graphql-go-tools/pkg/astvisitor"
-	"github.com/wundergraph/graphql-go-tools/pkg/operationreport"
-)
-
-// ValidArguments validates if arguments are valid: values and variables has compatible types
-// deep variables comparison is handled by Values
+// ValidArguments is kept as a compatibility alias; variable validation is handled by Values.
 func ValidArguments() Rule {
 	return func(walker *astvisitor.Walker) {
-		visitor := validArgumentsVisitor{
-			Walker: walker,
-		}
-		walker.RegisterEnterDocumentVisitor(&visitor)
-		walker.RegisterEnterArgumentVisitor(&visitor)
-	}
-}
-
-type validArgumentsVisitor struct {
-	*astvisitor.Walker
-	operation, definition *ast.Document
-}
-
-func (v *validArgumentsVisitor) EnterDocument(operation, definition *ast.Document) {
-	v.operation = operation
-	v.definition = definition
-}
-
-func (v *validArgumentsVisitor) EnterArgument(ref int) {
-	definitionRef, exists := v.ArgumentInputValueDefinition(ref)
-
-	if !exists {
-		return
-	}
-
-	value := v.operation.ArgumentValue(ref)
-	v.validateIfValueSatisfiesInputFieldDefinition(value, definitionRef)
-}
-
-func (v *validArgumentsVisitor) validateIfValueSatisfiesInputFieldDefinition(value ast.Value, inputValueDefinitionRef int) {
-	var (
-		satisfied             bool
-		operationTypeRef      int
-		variableDefinitionRef int
-	)
-
-	switch value.Kind {
-	case ast.ValueKindVariable:
-		satisfied, operationTypeRef, variableDefinitionRef = v.variableValueSatisfiesInputValueDefinition(value.Ref, inputValueDefinitionRef)
-	case ast.ValueKindEnum,
-		ast.ValueKindNull,
-		ast.ValueKindBoolean,
-		ast.ValueKindInteger,
-		ast.ValueKindString,
-		ast.ValueKindFloat,
-		ast.ValueKindObject,
-		ast.ValueKindList:
-		// this types of values are covered by Values() / valuesVisitor
-		return
-	default:
-		v.StopWithInternalErr(fmt.Errorf("validateIfValueSatisfiesInputFieldDefinition: not implemented for value.Kind: %s", value.Kind))
-		return
-	}
-
-	if satisfied {
-		return
-	}
-
-	if operationTypeRef == ast.InvalidRef {
-		// variable is not defined on operation
-		return
-	}
-
-	printedValue, err := v.operation.PrintValueBytes(value, nil)
-	if v.HandleInternalErr(err) {
-		return
-	}
-
-	typeRef := v.definition.InputValueDefinitionType(inputValueDefinitionRef)
-	expectedTypeName, err := v.definition.PrintTypeBytes(typeRef, nil)
-	if v.HandleInternalErr(err) {
-		return
-	}
-
-	actualTypeName, err := v.operation.PrintTypeBytes(operationTypeRef, nil)
-	if v.HandleInternalErr(err) {
-		return
-	}
-
-	v.StopWithExternalErr(operationreport.ErrVariableTypeDoesntSatisfyInputValueDefinition(printedValue, actualTypeName, expectedTypeName, value.Position, v.operation.VariableDefinitions[variableDefinitionRef].VariableValue.Position))
-}
-
-func (v *validArgumentsVisitor) variableValueSatisfiesInputValueDefinition(variableValue, inputValueDefinition int) (satisfies bool, operationTypeRef int, variableDefRef int) {
-	variableDefinitionRef, exists := v.variableDefinition(variableValue)
-	if !exists {
-		return false, ast.InvalidRef, variableDefinitionRef
-	}
-
-	operationTypeRef = v.operation.VariableDefinitions[variableDefinitionRef].Type
-	definitionTypeRef := v.definition.InputValueDefinitions[inputValueDefinition].Type
-
-	hasDefaultValue := v.validDefaultValue(v.operation.VariableDefinitions[variableDefinitionRef].DefaultValue) ||
-		v.validDefaultValue(v.definition.InputValueDefinitions[inputValueDefinition].DefaultValue)
-
-	return v.operationTypeSatisfiesDefinitionType(operationTypeRef, definitionTypeRef, hasDefaultValue), operationTypeRef, variableDefinitionRef
-}
-
-func (v *validArgumentsVisitor) variableDefinition(variableValueRef int) (ref int, exists bool) {
-	variableName := v.operation.VariableValueNameBytes(variableValueRef)
-
-	if v.Ancestors[0].Kind == ast.NodeKindOperationDefinition {
-		return v.operation.VariableDefinitionByNameAndOperation(v.Ancestors[0].Ref, variableName)
-	}
-
-	for opDefRef := 0; opDefRef < len(v.operation.OperationDefinitions); opDefRef++ {
-		ref, exists = v.operation.VariableDefinitionByNameAndOperation(opDefRef, variableName)
-		if exists {
-			return
-		}
-	}
-
-	return ast.InvalidRef, false
-}
-
-func (v *validArgumentsVisitor) validDefaultValue(value ast.DefaultValue) bool {
-	return value.IsDefined && value.Value.Kind != ast.ValueKindNull
-}
-
-func (v *validArgumentsVisitor) operationTypeSatisfiesDefinitionType(operationTypeRef int, definitionTypeRef int, hasDefaultValue bool) bool {
-	opKind := v.operation.Types[operationTypeRef].TypeKind
-	defKind := v.definition.Types[definitionTypeRef].TypeKind
-
-	// A nullable op type is compatible with a non-null def type if the def has
-	// a default value. Strip the def non-null and continue comparing. This
-	// logic is only valid before any unnesting of types occurs, which is why
-	// it's outside the for loop below.
-	//
-	// Example:
-	// Op:  someField(arg: Boolean): String
-	// Def: someField(arg: Boolean! = false): String  #  Boolean! -> Boolean
-	if opKind != ast.TypeKindNonNull && defKind == ast.TypeKindNonNull && hasDefaultValue {
-		definitionTypeRef = v.definition.Types[definitionTypeRef].OfType
-	}
-
-	// Unnest the op and def arg types until a named type is reached,
-	// then compare.
-	for {
-		if operationTypeRef == -1 || definitionTypeRef == -1 {
-			return false
-		}
-		opKind = v.operation.Types[operationTypeRef].TypeKind
-		defKind = v.definition.Types[definitionTypeRef].TypeKind
-
-		// If the op arg type is stricter than the def arg type, that's okay.
-		// Strip the op non-null and continue comparing.
-		//
-		// Example:
-		// Op:  someField(arg: Boolean!): String  # Boolean! -> Boolean
-		// Def: someField(arg: Boolean): String
-		if opKind == ast.TypeKindNonNull && defKind != ast.TypeKindNonNull {
-			operationTypeRef = v.operation.Types[operationTypeRef].OfType
-			continue
-		}
-
-		if opKind != defKind {
-			return false
-		}
-		if opKind == ast.TypeKindNamed {
-			// defKind is also a named type because at this point both kinds
-			// are the same! Compare the names.
-
-			return bytes.Equal(v.operation.Input.ByteSlice(v.operation.Types[operationTypeRef].Name),
-				v.definition.Input.ByteSlice(v.definition.Types[definitionTypeRef].Name))
-		}
-		// Both types are non-null or list. Unnest and continue comparing.
-		operationTypeRef = v.operation.Types[operationTypeRef].OfType
-		definitionTypeRef = v.definition.Types[definitionTypeRef].OfType
+		Values()(walker)
 	}
 }
diff --git a/tmp/agent-patch-flux-pr-1099.1-of-1.2026-02-28__13-38-10__gpt-5-4/app/pkg/astvalidation/operation_rule_values.go b/app/pkg/astvalidation/operation_rule_values.go
index 3ae503a..0795012 100644
--- a/tmp/agent-patch-flux-pr-1099.1-of-1.2026-02-28__13-38-10__gpt-5-4/app/pkg/astvalidation/operation_rule_values.go
+++ b/app/pkg/astvalidation/operation_rule_values.go
@@ -49,21 +49,15 @@ func (v *valuesVisitor) EnterArgument(ref int) {
 	}
 
 	value := v.operation.ArgumentValue(ref)
-	if value.Kind == ast.ValueKindVariable {
-		variableName := v.operation.VariableValueNameBytes(value.Ref)
-		variableDefinition, exists := v.operation.VariableDefinitionByNameAndOperation(v.Ancestors[0].Ref, variableName)
-		if !exists {
-			operationName := v.operation.OperationDefinitionNameBytes(v.Ancestors[0].Ref)
-			v.StopWithExternalErr(operationreport.ErrVariableNotDefinedOnOperation(variableName, operationName))
-			return
-		}
-		if !v.operation.VariableDefinitions[variableDefinition].DefaultValue.IsDefined {
-			return // variable has no default value, deep type check not required
-		}
-		value = v.operation.VariableDefinitions[variableDefinition].DefaultValue.Value
-	}
+	v.valueSatisfiesInputValueDefinition(value, definition)
+}
 
-	v.valueSatisfiesInputValueDefinitionType(value, v.definition.InputValueDefinitions[definition].Type)
+func (v *valuesVisitor) valueSatisfiesInputValueDefinition(value ast.Value, inputValueDefinitionRef int) bool {
+	return v.valueSatisfiesInputType(
+		value,
+		v.definition.InputValueDefinitions[inputValueDefinitionRef].Type,
+		v.validDefaultValue(v.definition.InputValueDefinitions[inputValueDefinitionRef].DefaultValue),
+	)
 }
 
 func (v *valuesVisitor) valueSatisfiesOperationType(value ast.Value, operationTypeRef int) bool {
@@ -152,6 +146,14 @@ func (v *valuesVisitor) valueSatisfiesOperationListType(value ast.Value, operati
 }
 
 func (v *valuesVisitor) valueSatisfiesInputValueDefinitionType(value ast.Value, definitionTypeRef int) bool {
+	return v.valueSatisfiesInputType(value, definitionTypeRef, false)
+}
+
+func (v *valuesVisitor) valueSatisfiesInputType(value ast.Value, definitionTypeRef int, hasLocationDefaultValue bool) bool {
+	if value.Kind == ast.ValueKindVariable {
+		return v.variableValueSatisfiesDefinitionType(value, definitionTypeRef, hasLocationDefaultValue)
+	}
+
 	switch v.definition.Types[definitionTypeRef].TypeKind {
 	case ast.TypeKindNonNull:
 		return v.valuesSatisfiesNonNullType(value, definitionTypeRef)
@@ -166,27 +168,9 @@ func (v *valuesVisitor) valueSatisfiesInputValueDefinitionType(value ast.Value,
 }
 
 func (v *valuesVisitor) valuesSatisfiesNonNullType(value ast.Value, definitionTypeRef int) bool {
-	switch value.Kind {
-	case ast.ValueKindNull:
+	if value.Kind == ast.ValueKindNull {
 		v.handleUnexpectedNullError(value, definitionTypeRef)
 		return false
-	case ast.ValueKindVariable:
-		variableDefinitionRef, variableTypeRef, _, ok := v.operationVariableType(value.Ref)
-		if !ok {
-			v.handleTypeError(value, definitionTypeRef)
-			return false
-		}
-
-		if v.operation.VariableDefinitionHasDefaultValue(variableDefinitionRef) {
-			return v.valueSatisfiesInputValueDefinitionType(v.operation.VariableDefinitions[variableDefinitionRef].DefaultValue.Value, definitionTypeRef)
-		}
-
-		importedDefinitionType := v.importer.ImportType(definitionTypeRef, v.definition, v.operation)
-		if !v.operation.TypesAreEqualDeep(importedDefinitionType, variableTypeRef) {
-			v.handleVariableHasIncompatibleTypeError(value, definitionTypeRef)
-			return false
-		}
-		return true
 	}
 	return v.valueSatisfiesInputValueDefinitionType(value, v.definition.Types[definitionTypeRef].OfType)
 }
@@ -208,32 +192,6 @@ func (v *valuesVisitor) valuesSatisfiesNamedType(value ast.Value, definitionType
 }
 
 func (v *valuesVisitor) valueSatisfiesListType(value ast.Value, definitionTypeRef int, listItemType int) bool {
-
-	if value.Kind == ast.ValueKindVariable {
-		variableDefinitionRef, actualType, _, ok := v.operationVariableType(value.Ref)
-		if !ok {
-			v.handleTypeError(value, definitionTypeRef)
-			return false
-		}
-
-		if v.operation.VariableDefinitionHasDefaultValue(variableDefinitionRef) {
-			return v.valueSatisfiesInputValueDefinitionType(v.operation.VariableDefinitions[variableDefinitionRef].DefaultValue.Value, definitionTypeRef)
-		}
-
-		expectedType := v.importer.ImportType(listItemType, v.definition, v.operation)
-		if v.operation.Types[actualType].TypeKind == ast.TypeKindNonNull {
-			actualType = v.operation.Types[actualType].OfType
-		}
-		if v.operation.Types[actualType].TypeKind == ast.TypeKindList {
-			actualType = v.operation.Types[actualType].OfType
-		}
-		if !v.operation.TypesAreEqualDeep(expectedType, actualType) {
-			v.handleVariableHasIncompatibleTypeError(value, definitionTypeRef)
-			return false
-		}
-		return true
-	}
-
 	if value.Kind == ast.ValueKindNull {
 		return true
 	}
@@ -275,11 +233,6 @@ func (v *valuesVisitor) valueSatisfiesTypeDefinitionNode(value ast.Value, defini
 }
 
 func (v *valuesVisitor) valueSatisfiesEnum(value ast.Value, definitionTypeRef int, node ast.Node) bool {
-	if value.Kind == ast.ValueKindVariable {
-		expectedTypeName := node.NameBytes(v.definition)
-		return v.variableValueHasMatchingTypeName(value, definitionTypeRef, expectedTypeName)
-	}
-
 	if value.Kind != ast.ValueKindEnum {
 		v.handleUnexpectedEnumValueError(value, definitionTypeRef)
 		return false
@@ -297,10 +250,6 @@ func (v *valuesVisitor) valueSatisfiesEnum(value ast.Value, definitionTypeRef in
 func (v *valuesVisitor) valueSatisfiesScalar(value ast.Value, definitionTypeRef int, scalar int) bool {
 	scalarName := v.definition.ScalarTypeDefinitionNameBytes(scalar)
 
-	if value.Kind == ast.ValueKindVariable {
-		return v.variableValueHasMatchingTypeName(value, definitionTypeRef, scalarName)
-	}
-
 	switch {
 	case bytes.Equal(scalarName, literal.ID):
 		return v.valueSatisfiesScalarID(value, definitionTypeRef)
@@ -408,11 +357,6 @@ func (v *valuesVisitor) valueSatisfiesScalarString(value ast.Value, definitionTy
 }
 
 func (v *valuesVisitor) valueSatisfiesInputObjectTypeDefinition(value ast.Value, definitionTypeRef int, inputObjectTypeDefinition int) bool {
-	if value.Kind == ast.ValueKindVariable {
-		expectedTypeName := v.definition.InputObjectTypeDefinitionNameBytes(inputObjectTypeDefinition)
-		return v.variableValueHasMatchingTypeName(value, definitionTypeRef, expectedTypeName)
-	}
-
 	if value.Kind != ast.ValueKindObject {
 		v.handleNotObjectTypeError(value, definitionTypeRef)
 		return false
@@ -495,12 +439,11 @@ func (v *valuesVisitor) objectFieldDefined(objectField, inputObjectTypeDefinitio
 func (v *valuesVisitor) objectValueSatisfiesInputValueDefinition(objectValue ast.Value, inputObjectDefinition, inputValueDefinition int) bool {
 
 	name := v.definition.InputValueDefinitionNameBytes(inputValueDefinition)
-	definitionTypeRef := v.definition.InputValueDefinitionType(inputValueDefinition)
 
 	for _, i := range v.operation.ObjectValues[objectValue.Ref].Refs {
 		if bytes.Equal(name, v.operation.ObjectFieldNameBytes(i)) {
 			value := v.operation.ObjectFieldValue(i)
-			return v.valueSatisfiesInputValueDefinitionType(value, definitionTypeRef)
+			return v.valueSatisfiesInputValueDefinition(value, inputValueDefinition)
 		}
 	}
 
@@ -513,18 +456,14 @@ func (v *valuesVisitor) objectValueSatisfiesInputValueDefinition(objectValue ast
 	return true
 }
 
-func (v *valuesVisitor) variableValueHasMatchingTypeName(value ast.Value, definitionTypeRef int, expectedTypeName []byte) bool {
-	variableDefinitionRef, _, actualTypeName, ok := v.operationVariableType(value.Ref)
+func (v *valuesVisitor) variableValueSatisfiesDefinitionType(value ast.Value, definitionTypeRef int, hasLocationDefaultValue bool) bool {
+	variableDefinitionRef, variableTypeRef, _, ok := v.operationVariableType(value.Ref)
 	if !ok {
-		v.handleVariableHasIncompatibleTypeError(value, definitionTypeRef)
 		return false
 	}
 
-	if v.operation.VariableDefinitionHasDefaultValue(variableDefinitionRef) {
-		return v.valueSatisfiesInputValueDefinitionType(v.operation.VariableDefinitions[variableDefinitionRef].DefaultValue.Value, definitionTypeRef)
-	}
-
-	if !bytes.Equal(actualTypeName, expectedTypeName) {
+	hasDefaultValue := v.validDefaultValue(v.operation.VariableDefinitions[variableDefinitionRef].DefaultValue) || hasLocationDefaultValue
+	if !v.operationTypeSatisfiesDefinitionType(variableTypeRef, definitionTypeRef, hasDefaultValue) {
 		v.handleVariableHasIncompatibleTypeError(value, definitionTypeRef)
 		return false
 	}
@@ -532,6 +471,49 @@ func (v *valuesVisitor) variableValueHasMatchingTypeName(value ast.Value, defini
 	return true
 }
 
+func (v *valuesVisitor) validDefaultValue(value ast.DefaultValue) bool {
+	return value.IsDefined && value.Value.Kind != ast.ValueKindNull
+}
+
+func (v *valuesVisitor) operationTypeSatisfiesDefinitionType(operationTypeRef int, definitionTypeRef int, hasDefaultValue bool) bool {
+	opKind := v.operation.Types[operationTypeRef].TypeKind
+	defKind := v.definition.Types[definitionTypeRef].TypeKind
+
+	if opKind != ast.TypeKindNonNull && defKind == ast.TypeKindNonNull && hasDefaultValue {
+		definitionTypeRef = v.definition.Types[definitionTypeRef].OfType
+	}
+
+	importedDefinitionType := v.importer.ImportType(definitionTypeRef, v.definition, v.operation)
+
+	for {
+		if operationTypeRef == ast.InvalidRef || importedDefinitionType == ast.InvalidRef {
+			return false
+		}
+
+		opKind = v.operation.Types[operationTypeRef].TypeKind
+		defKind = v.operation.Types[importedDefinitionType].TypeKind
+
+		if opKind == ast.TypeKindNonNull && defKind != ast.TypeKindNonNull {
+			operationTypeRef = v.operation.Types[operationTypeRef].OfType
+			continue
+		}
+
+		if opKind != defKind {
+			return false
+		}
+
+		if opKind == ast.TypeKindNamed {
+			return bytes.Equal(
+				v.operation.Input.ByteSlice(v.operation.Types[operationTypeRef].Name),
+				v.operation.Input.ByteSlice(v.operation.Types[importedDefinitionType].Name),
+			)
+		}
+
+		operationTypeRef = v.operation.Types[operationTypeRef].OfType
+		importedDefinitionType = v.operation.Types[importedDefinitionType].OfType
+	}
+}
+
 func (v *valuesVisitor) handleTypeError(value ast.Value, definitionTypeRef int) {
 	printedValue, printedType, ok := v.printValueAndUnderlyingType(value, definitionTypeRef)
 	if !ok {
@@ -588,11 +570,16 @@ func (v *valuesVisitor) handleVariableHasIncompatibleTypeError(value ast.Value,
 		return
 	}
 
-	variableDefinitionRef, _, actualTypeName, ok := v.operationVariableType(value.Ref)
+	variableDefinitionRef, variableTypeRef, _, ok := v.operationVariableType(value.Ref)
 	if !ok {
 		return
 	}
 
+	actualTypeName, err := v.operation.PrintTypeBytes(variableTypeRef, nil)
+	if v.HandleInternalErr(err) {
+		return
+	}
+
 	v.Report.AddExternalError(operationreport.ErrVariableTypeDoesntSatisfyInputValueDefinition(
 		printedValue,
 		actualTypeName,
diff --git a/tmp/agent-patch-flux-pr-1099.1-of-1.2026-02-28__13-38-10__gpt-5-4/app/pkg/astvalidation/operation_validation.go b/app/pkg/astvalidation/operation_validation.go
index 0057127..6293024 100644
--- a/tmp/agent-patch-flux-pr-1099.1-of-1.2026-02-28__13-38-10__gpt-5-4/app/pkg/astvalidation/operation_validation.go
+++ b/app/pkg/astvalidation/operation_validation.go
@@ -23,7 +23,6 @@ func DefaultOperationValidator() *OperationValidator {
 	validator.RegisterRule(FieldSelections())
 	validator.RegisterRule(FieldSelectionMerging())
 	validator.RegisterRule(KnownArguments())
-	validator.RegisterRule(ValidArguments())
 	validator.RegisterRule(Values())
 	validator.RegisterRule(ArgumentUniqueness())
 	validator.RegisterRule(RequiredArguments())
diff --git a/tmp/agent-patch-flux-pr-1099.1-of-1.2026-02-28__13-38-10__gpt-5-4/app/pkg/astvalidation/operation_validation_test.go b/app/pkg/astvalidation/operation_validation_test.go
index 20c9f13..cf326db 100644
--- a/tmp/agent-patch-flux-pr-1099.1-of-1.2026-02-28__13-38-10__gpt-5-4/app/pkg/astvalidation/operation_validation_test.go
+++ b/app/pkg/astvalidation/operation_validation_test.go
@@ -3870,6 +3870,30 @@ func TestExecutionValidation(t *testing.T) {
 						`Variable "$a" of type "Boolean" used in position expecting type "[String]"`,
 					))
 			})
+
+			t.Run("complex nested optionalListOfOptionalStrings of type [String] should accept more restrictive type [String!]!", func(t *testing.T) {
+				runWithDefinition(t, `
+						scalar String
+
+						schema {
+							query: Query
+						}
+
+						type Query {
+							nested(input: NestedInput): String
+						}
+
+						input NestedInput {
+							optionalListOfOptionalStrings: [String]
+						}
+						`, `
+						query Q($a: [String!]!) {
+							nested(input: {
+								optionalListOfOptionalStrings: $a
+							})
+						}
+						`, Values(), Valid)
+			})
 		})
 	})
 }
diff --git a/tmp/agent-patch-flux-pr-1099.1-of-1.2026-02-28__13-38-10__gpt-5-4/app/pkg/astvalidation/reference/testsgo/harness_test.go b/app/pkg/astvalidation/reference/testsgo/harness_test.go
index 19150b0..0c409cb 100644
--- a/tmp/agent-patch-flux-pr-1099.1-of-1.2026-02-28__13-38-10__gpt-5-4/app/pkg/astvalidation/reference/testsgo/harness_test.go
+++ b/app/pkg/astvalidation/reference/testsgo/harness_test.go
@@ -86,7 +86,7 @@ var rulesMap = map[string][]astvalidation.Rule{
 	ValuesOfCorrectTypeRule:                   {astvalidation.Values()},
 	VariablesAreInputTypesRule:                {astvalidation.VariablesAreInputTypes()},
 	KnownTypeNamesOperationRule:               {astvalidation.VariablesAreInputTypes(), astvalidation.Fragments()},
-	VariablesInAllowedPositionRule:            {astvalidation.ValidArguments(), astvalidation.Values()},
+	VariablesInAllowedPositionRule:            {astvalidation.Values()},
 
 	// fragments rules
 	FragmentsOnCompositeTypesRule: {astvalidation.Fragments()},
diff --git a/tmp/agent-patch-flux-pr-1099.1-of-1.2026-02-28__13-38-10__gpt-5-4/app/v2/pkg/astvalidation/operation_rule_valid_arguments.go b/app/v2/pkg/astvalidation/operation_rule_valid_arguments.go
index 0608211..01b8eeb 100644
--- a/tmp/agent-patch-flux-pr-1099.1-of-1.2026-02-28__13-38-10__gpt-5-4/app/v2/pkg/astvalidation/operation_rule_valid_arguments.go
+++ b/app/v2/pkg/astvalidation/operation_rule_valid_arguments.go
@@ -1,184 +1,10 @@
 package astvalidation
 
-import (
-	"bytes"
-	"fmt"
+import "github.com/wundergraph/graphql-go-tools/v2/pkg/astvisitor"
 
-	"github.com/wundergraph/graphql-go-tools/v2/pkg/ast"
-	"github.com/wundergraph/graphql-go-tools/v2/pkg/astvisitor"
-	"github.com/wundergraph/graphql-go-tools/v2/pkg/operationreport"
-)
-
-// ValidArguments validates if arguments are valid: values and variables has compatible types
-// deep variables comparison is handled by Values
+// ValidArguments is kept as a compatibility alias; variable validation is handled by Values.
 func ValidArguments() Rule {
 	return func(walker *astvisitor.Walker) {
-		visitor := validArgumentsVisitor{
-			Walker: walker,
-		}
-		walker.RegisterEnterDocumentVisitor(&visitor)
-		walker.RegisterEnterArgumentVisitor(&visitor)
-	}
-}
-
-type validArgumentsVisitor struct {
-	*astvisitor.Walker
-	operation, definition *ast.Document
-}
-
-func (v *validArgumentsVisitor) EnterDocument(operation, definition *ast.Document) {
-	v.operation = operation
-	v.definition = definition
-}
-
-func (v *validArgumentsVisitor) EnterArgument(ref int) {
-	definitionRef, exists := v.ArgumentInputValueDefinition(ref)
-
-	if !exists {
-		return
-	}
-
-	value := v.operation.ArgumentValue(ref)
-	v.validateIfValueSatisfiesInputFieldDefinition(value, definitionRef)
-}
-
-func (v *validArgumentsVisitor) validateIfValueSatisfiesInputFieldDefinition(value ast.Value, inputValueDefinitionRef int) {
-	var (
-		satisfied             bool
-		operationTypeRef      int
-		variableDefinitionRef int
-	)
-
-	switch value.Kind {
-	case ast.ValueKindVariable:
-		satisfied, operationTypeRef, variableDefinitionRef = v.variableValueSatisfiesInputValueDefinition(value.Ref, inputValueDefinitionRef)
-	case ast.ValueKindEnum,
-		ast.ValueKindNull,
-		ast.ValueKindBoolean,
-		ast.ValueKindInteger,
-		ast.ValueKindString,
-		ast.ValueKindFloat,
-		ast.ValueKindObject,
-		ast.ValueKindList:
-		// this types of values are covered by Values() / valuesVisitor
-		return
-	default:
-		v.StopWithInternalErr(fmt.Errorf("validateIfValueSatisfiesInputFieldDefinition: not implemented for value.Kind: %s", value.Kind))
-		return
-	}
-
-	if satisfied {
-		return
-	}
-
-	if operationTypeRef == ast.InvalidRef {
-		// variable is not defined
-		return
-	}
-
-	printedValue, err := v.operation.PrintValueBytes(value, nil)
-	if v.HandleInternalErr(err) {
-		return
-	}
-
-	typeRef := v.definition.InputValueDefinitionType(inputValueDefinitionRef)
-	expectedTypeName, err := v.definition.PrintTypeBytes(typeRef, nil)
-	if v.HandleInternalErr(err) {
-		return
-	}
-
-	actualTypeName, err := v.operation.PrintTypeBytes(operationTypeRef, nil)
-	if v.HandleInternalErr(err) {
-		return
-	}
-
-	v.StopWithExternalErr(operationreport.ErrVariableTypeDoesntSatisfyInputValueDefinition(printedValue, actualTypeName, expectedTypeName, value.Position, v.operation.VariableDefinitions[variableDefinitionRef].VariableValue.Position))
-}
-
-func (v *validArgumentsVisitor) variableValueSatisfiesInputValueDefinition(variableValue, inputValueDefinition int) (satisfies bool, operationTypeRef int, variableDefRef int) {
-	variableDefinitionRef, exists := v.variableDefinition(variableValue)
-	if !exists {
-		return false, ast.InvalidRef, variableDefinitionRef
-	}
-
-	operationTypeRef = v.operation.VariableDefinitions[variableDefinitionRef].Type
-	definitionTypeRef := v.definition.InputValueDefinitions[inputValueDefinition].Type
-
-	hasDefaultValue := v.validDefaultValue(v.operation.VariableDefinitions[variableDefinitionRef].DefaultValue) ||
-		v.validDefaultValue(v.definition.InputValueDefinitions[inputValueDefinition].DefaultValue)
-
-	return v.operationTypeSatisfiesDefinitionType(operationTypeRef, definitionTypeRef, hasDefaultValue), operationTypeRef, variableDefinitionRef
-}
-
-func (v *validArgumentsVisitor) variableDefinition(variableValueRef int) (ref int, exists bool) {
-	variableName := v.operation.VariableValueNameBytes(variableValueRef)
-
-	if v.Ancestors[0].Kind == ast.NodeKindOperationDefinition {
-		return v.operation.VariableDefinitionByNameAndOperation(v.Ancestors[0].Ref, variableName)
-	}
-
-	for opDefRef := 0; opDefRef < len(v.operation.OperationDefinitions); opDefRef++ {
-		ref, exists = v.operation.VariableDefinitionByNameAndOperation(opDefRef, variableName)
-		if exists {
-			return
-		}
-	}
-
-	return ast.InvalidRef, false
-}
-
-func (v *validArgumentsVisitor) validDefaultValue(value ast.DefaultValue) bool {
-	return value.IsDefined && value.Value.Kind != ast.ValueKindNull
-}
-
-func (v *validArgumentsVisitor) operationTypeSatisfiesDefinitionType(operationTypeRef int, definitionTypeRef int, hasDefaultValue bool) bool {
-	opKind := v.operation.Types[operationTypeRef].TypeKind
-	defKind := v.definition.Types[definitionTypeRef].TypeKind
-
-	// A nullable op type is compatible with a non-null def type if the def has
-	// a default value. Strip the def non-null and continue comparing. This
-	// logic is only valid before any unnesting of types occurs, which is why
-	// it's outside the for loop below.
-	//
-	// Example:
-	// Op:  someField(arg: Boolean): String
-	// Def: someField(arg: Boolean! = false): String  #  Boolean! -> Boolean
-	if opKind != ast.TypeKindNonNull && defKind == ast.TypeKindNonNull && hasDefaultValue {
-		definitionTypeRef = v.definition.Types[definitionTypeRef].OfType
-	}
-
-	// Unnest the op and def arg types until a named type is reached,
-	// then compare.
-	for {
-		if operationTypeRef == -1 || definitionTypeRef == -1 {
-			return false
-		}
-		opKind = v.operation.Types[operationTypeRef].TypeKind
-		defKind = v.definition.Types[definitionTypeRef].TypeKind
-
-		// If the op arg type is stricter than the def arg type, that's okay.
-		// Strip the op non-null and continue comparing.
-		//
-		// Example:
-		// Op:  someField(arg: Boolean!): String  # Boolean! -> Boolean
-		// Def: someField(arg: Boolean): String
-		if opKind == ast.TypeKindNonNull && defKind != ast.TypeKindNonNull {
-			operationTypeRef = v.operation.Types[operationTypeRef].OfType
-			continue
-		}
-
-		if opKind != defKind {
-			return false
-		}
-		if opKind == ast.TypeKindNamed {
-			// defKind is also a named type because at this point both kinds
-			// are the same! Compare the names.
-
-			return bytes.Equal(v.operation.Input.ByteSlice(v.operation.Types[operationTypeRef].Name),
-				v.definition.Input.ByteSlice(v.definition.Types[definitionTypeRef].Name))
-		}
-		// Both types are non-null or list. Unnest and continue comparing.
-		operationTypeRef = v.operation.Types[operationTypeRef].OfType
-		definitionTypeRef = v.definition.Types[definitionTypeRef].OfType
+		Values()(walker)
 	}
 }
diff --git a/tmp/agent-patch-flux-pr-1099.1-of-1.2026-02-28__13-38-10__gpt-5-4/app/v2/pkg/astvalidation/operation_rule_values.go b/app/v2/pkg/astvalidation/operation_rule_values.go
index 3b6d7b5..24f58dc 100644
--- a/tmp/agent-patch-flux-pr-1099.1-of-1.2026-02-28__13-38-10__gpt-5-4/app/v2/pkg/astvalidation/operation_rule_values.go
+++ b/app/v2/pkg/astvalidation/operation_rule_values.go
@@ -51,21 +51,15 @@ func (v *valuesVisitor) EnterArgument(ref int) {
 	}
 
 	value := v.operation.ArgumentValue(ref)
-	if value.Kind == ast.ValueKindVariable {
-		variableName := v.operation.VariableValueNameBytes(value.Ref)
-		variableDefinition, exists := v.operation.VariableDefinitionByNameAndOperation(v.Ancestors[0].Ref, variableName)
-		if !exists {
-			operationName := v.operation.OperationDefinitionNameBytes(v.Ancestors[0].Ref)
-			v.StopWithExternalErr(operationreport.ErrVariableNotDefinedOnOperation(variableName, operationName))
-			return
-		}
-		if !v.operation.VariableDefinitions[variableDefinition].DefaultValue.IsDefined {
-			return // variable has no default value, deep type check not required
-		}
-		value = v.operation.VariableDefinitions[variableDefinition].DefaultValue.Value
-	}
+	v.valueSatisfiesInputValueDefinition(value, definition)
+}
 
-	v.valueSatisfiesInputValueDefinitionType(value, v.definition.InputValueDefinitions[definition].Type)
+func (v *valuesVisitor) valueSatisfiesInputValueDefinition(value ast.Value, inputValueDefinitionRef int) bool {
+	return v.valueSatisfiesInputType(
+		value,
+		v.definition.InputValueDefinitions[inputValueDefinitionRef].Type,
+		v.validDefaultValue(v.definition.InputValueDefinitions[inputValueDefinitionRef].DefaultValue),
+	)
 }
 
 func (v *valuesVisitor) valueSatisfiesOperationType(value ast.Value, operationTypeRef int) bool {
@@ -154,6 +148,14 @@ func (v *valuesVisitor) valueSatisfiesOperationListType(value ast.Value, operati
 }
 
 func (v *valuesVisitor) valueSatisfiesInputValueDefinitionType(value ast.Value, definitionTypeRef int) bool {
+	return v.valueSatisfiesInputType(value, definitionTypeRef, false)
+}
+
+func (v *valuesVisitor) valueSatisfiesInputType(value ast.Value, definitionTypeRef int, hasLocationDefaultValue bool) bool {
+	if value.Kind == ast.ValueKindVariable {
+		return v.variableValueSatisfiesDefinitionType(value, definitionTypeRef, hasLocationDefaultValue)
+	}
+
 	switch v.definition.Types[definitionTypeRef].TypeKind {
 	case ast.TypeKindNonNull:
 		return v.valuesSatisfiesNonNullType(value, definitionTypeRef)
@@ -168,27 +170,9 @@ func (v *valuesVisitor) valueSatisfiesInputValueDefinitionType(value ast.Value,
 }
 
 func (v *valuesVisitor) valuesSatisfiesNonNullType(value ast.Value, definitionTypeRef int) bool {
-	switch value.Kind {
-	case ast.ValueKindNull:
+	if value.Kind == ast.ValueKindNull {
 		v.handleUnexpectedNullError(value, definitionTypeRef)
 		return false
-	case ast.ValueKindVariable:
-		variableDefinitionRef, variableTypeRef, _, ok := v.operationVariableType(value.Ref)
-		if !ok {
-			v.handleTypeError(value, definitionTypeRef)
-			return false
-		}
-
-		if v.operation.VariableDefinitionHasDefaultValue(variableDefinitionRef) {
-			return v.valueSatisfiesInputValueDefinitionType(v.operation.VariableDefinitions[variableDefinitionRef].DefaultValue.Value, definitionTypeRef)
-		}
-
-		importedDefinitionType := v.importer.ImportType(definitionTypeRef, v.definition, v.operation)
-		if !v.operation.TypesAreEqualDeep(importedDefinitionType, variableTypeRef) {
-			v.handleVariableHasIncompatibleTypeError(value, definitionTypeRef)
-			return false
-		}
-		return true
 	}
 	return v.valueSatisfiesInputValueDefinitionType(value, v.definition.Types[definitionTypeRef].OfType)
 }
@@ -210,28 +194,6 @@ func (v *valuesVisitor) valuesSatisfiesNamedType(value ast.Value, definitionType
 }
 
 func (v *valuesVisitor) valueSatisfiesListType(value ast.Value, definitionTypeRef int, listItemType int) bool {
-
-	if value.Kind == ast.ValueKindVariable {
-		variableDefinitionRef, actualType, _, ok := v.operationVariableType(value.Ref)
-		if !ok {
-			v.handleTypeError(value, definitionTypeRef)
-			return false
-		}
-
-		if v.operation.VariableDefinitionHasDefaultValue(variableDefinitionRef) {
-			return v.valueSatisfiesInputValueDefinitionType(v.operation.VariableDefinitions[variableDefinitionRef].DefaultValue.Value, definitionTypeRef)
-		}
-
-		expectedType := v.importer.ImportType(listItemType, v.definition, v.operation)
-		actualType = v.operation.ResolveUnderlyingType(actualType)
-
-		if !v.operation.TypesAreEqualDeep(expectedType, actualType) {
-			v.handleVariableHasIncompatibleTypeError(value, definitionTypeRef)
-			return false
-		}
-		return true
-	}
-
 	if value.Kind == ast.ValueKindNull {
 		return true
 	}
@@ -273,11 +235,6 @@ func (v *valuesVisitor) valueSatisfiesTypeDefinitionNode(value ast.Value, defini
 }
 
 func (v *valuesVisitor) valueSatisfiesEnum(value ast.Value, definitionTypeRef int, node ast.Node) bool {
-	if value.Kind == ast.ValueKindVariable {
-		expectedTypeName := node.NameBytes(v.definition)
-		return v.variableValueHasMatchingTypeName(value, definitionTypeRef, expectedTypeName)
-	}
-
 	if value.Kind != ast.ValueKindEnum {
 		v.handleUnexpectedEnumValueError(value, definitionTypeRef)
 		return false
@@ -296,10 +253,6 @@ func (v *valuesVisitor) valueSatisfiesEnum(value ast.Value, definitionTypeRef in
 func (v *valuesVisitor) valueSatisfiesScalar(value ast.Value, definitionTypeRef int, scalar int) bool {
 	scalarName := v.definition.ScalarTypeDefinitionNameBytes(scalar)
 
-	if value.Kind == ast.ValueKindVariable {
-		return v.variableValueHasMatchingTypeName(value, definitionTypeRef, scalarName)
-	}
-
 	switch {
 	case bytes.Equal(scalarName, literal.ID):
 		return v.valueSatisfiesScalarID(value, definitionTypeRef)
@@ -407,11 +360,6 @@ func (v *valuesVisitor) valueSatisfiesScalarString(value ast.Value, definitionTy
 }
 
 func (v *valuesVisitor) valueSatisfiesInputObjectTypeDefinition(value ast.Value, definitionTypeRef int, inputObjectTypeDefinition int) bool {
-	if value.Kind == ast.ValueKindVariable {
-		expectedTypeName := v.definition.InputObjectTypeDefinitionNameBytes(inputObjectTypeDefinition)
-		return v.variableValueHasMatchingTypeName(value, definitionTypeRef, expectedTypeName)
-	}
-
 	if value.Kind != ast.ValueKindObject {
 		v.handleNotObjectTypeError(value, definitionTypeRef)
 		return false
@@ -494,12 +442,11 @@ func (v *valuesVisitor) objectFieldDefined(objectField, inputObjectTypeDefinitio
 func (v *valuesVisitor) objectValueSatisfiesInputValueDefinition(objectValue ast.Value, inputObjectDefinition, inputValueDefinition int) bool {
 
 	name := v.definition.InputValueDefinitionNameBytes(inputValueDefinition)
-	definitionTypeRef := v.definition.InputValueDefinitionType(inputValueDefinition)
 
 	for _, i := range v.operation.ObjectValues[objectValue.Ref].Refs {
 		if bytes.Equal(name, v.operation.ObjectFieldNameBytes(i)) {
 			value := v.operation.ObjectFieldValue(i)
-			return v.valueSatisfiesInputValueDefinitionType(value, definitionTypeRef)
+			return v.valueSatisfiesInputValueDefinition(value, inputValueDefinition)
 		}
 	}
 
@@ -512,18 +459,14 @@ func (v *valuesVisitor) objectValueSatisfiesInputValueDefinition(objectValue ast
 	return true
 }
 
-func (v *valuesVisitor) variableValueHasMatchingTypeName(value ast.Value, definitionTypeRef int, expectedTypeName []byte) bool {
-	variableDefinitionRef, _, actualTypeName, ok := v.operationVariableType(value.Ref)
+func (v *valuesVisitor) variableValueSatisfiesDefinitionType(value ast.Value, definitionTypeRef int, hasLocationDefaultValue bool) bool {
+	variableDefinitionRef, variableTypeRef, _, ok := v.operationVariableType(value.Ref)
 	if !ok {
-		v.handleVariableHasIncompatibleTypeError(value, definitionTypeRef)
 		return false
 	}
 
-	if v.operation.VariableDefinitionHasDefaultValue(variableDefinitionRef) {
-		return v.valueSatisfiesInputValueDefinitionType(v.operation.VariableDefinitions[variableDefinitionRef].DefaultValue.Value, definitionTypeRef)
-	}
-
-	if !bytes.Equal(actualTypeName, expectedTypeName) {
+	hasDefaultValue := v.validDefaultValue(v.operation.VariableDefinitions[variableDefinitionRef].DefaultValue) || hasLocationDefaultValue
+	if !v.operationTypeSatisfiesDefinitionType(variableTypeRef, definitionTypeRef, hasDefaultValue) {
 		v.handleVariableHasIncompatibleTypeError(value, definitionTypeRef)
 		return false
 	}
@@ -531,6 +474,49 @@ func (v *valuesVisitor) variableValueHasMatchingTypeName(value ast.Value, defini
 	return true
 }
 
+func (v *valuesVisitor) validDefaultValue(value ast.DefaultValue) bool {
+	return value.IsDefined && value.Value.Kind != ast.ValueKindNull
+}
+
+func (v *valuesVisitor) operationTypeSatisfiesDefinitionType(operationTypeRef int, definitionTypeRef int, hasDefaultValue bool) bool {
+	opKind := v.operation.Types[operationTypeRef].TypeKind
+	defKind := v.definition.Types[definitionTypeRef].TypeKind
+
+	if opKind != ast.TypeKindNonNull && defKind == ast.TypeKindNonNull && hasDefaultValue {
+		definitionTypeRef = v.definition.Types[definitionTypeRef].OfType
+	}
+
+	importedDefinitionType := v.importer.ImportType(definitionTypeRef, v.definition, v.operation)
+
+	for {
+		if operationTypeRef == ast.InvalidRef || importedDefinitionType == ast.InvalidRef {
+			return false
+		}
+
+		opKind = v.operation.Types[operationTypeRef].TypeKind
+		defKind = v.operation.Types[importedDefinitionType].TypeKind
+
+		if opKind == ast.TypeKindNonNull && defKind != ast.TypeKindNonNull {
+			operationTypeRef = v.operation.Types[operationTypeRef].OfType
+			continue
+		}
+
+		if opKind != defKind {
+			return false
+		}
+
+		if opKind == ast.TypeKindNamed {
+			return bytes.Equal(
+				v.operation.Input.ByteSlice(v.operation.Types[operationTypeRef].Name),
+				v.operation.Input.ByteSlice(v.operation.Types[importedDefinitionType].Name),
+			)
+		}
+
+		operationTypeRef = v.operation.Types[operationTypeRef].OfType
+		importedDefinitionType = v.operation.Types[importedDefinitionType].OfType
+	}
+}
+
 func (v *valuesVisitor) handleTypeError(value ast.Value, definitionTypeRef int) {
 	printedValue, printedType, ok := v.printValueAndUnderlyingType(value, definitionTypeRef)
 	if !ok {
@@ -587,11 +573,16 @@ func (v *valuesVisitor) handleVariableHasIncompatibleTypeError(value ast.Value,
 		return
 	}
 
-	variableDefinitionRef, _, actualTypeName, ok := v.operationVariableType(value.Ref)
+	variableDefinitionRef, variableTypeRef, _, ok := v.operationVariableType(value.Ref)
 	if !ok {
 		return
 	}
 
+	actualTypeName, err := v.operation.PrintTypeBytes(variableTypeRef, nil)
+	if v.HandleInternalErr(err) {
+		return
+	}
+
 	v.Report.AddExternalError(operationreport.ErrVariableTypeDoesntSatisfyInputValueDefinition(
 		printedValue,
 		actualTypeName,
diff --git a/tmp/agent-patch-flux-pr-1099.1-of-1.2026-02-28__13-38-10__gpt-5-4/app/v2/pkg/astvalidation/operation_validation.go b/app/v2/pkg/astvalidation/operation_validation.go
index fa1546c..b33c80b 100644
--- a/tmp/agent-patch-flux-pr-1099.1-of-1.2026-02-28__13-38-10__gpt-5-4/app/v2/pkg/astvalidation/operation_validation.go
+++ b/app/v2/pkg/astvalidation/operation_validation.go
@@ -39,7 +39,6 @@ func DefaultOperationValidator(options ...Option) *OperationValidator {
 	validator.RegisterRule(FieldSelections(opts))
 	validator.RegisterRule(FieldSelectionMerging())
 	validator.RegisterRule(KnownArguments())
-	validator.RegisterRule(ValidArguments())
 	validator.RegisterRule(Values())
 	validator.RegisterRule(ArgumentUniqueness())
 	validator.RegisterRule(RequiredArguments())
diff --git a/tmp/agent-patch-flux-pr-1099.1-of-1.2026-02-28__13-38-10__gpt-5-4/app/v2/pkg/astvalidation/reference/testsgo/harness_test.go b/app/v2/pkg/astvalidation/reference/testsgo/harness_test.go
index 00566f0..6f18dbf 100644
--- a/tmp/agent-patch-flux-pr-1099.1-of-1.2026-02-28__13-38-10__gpt-5-4/app/v2/pkg/astvalidation/reference/testsgo/harness_test.go
+++ b/app/v2/pkg/astvalidation/reference/testsgo/harness_test.go
@@ -86,7 +86,7 @@ var rulesMap = map[string][]astvalidation.Rule{
 	ValuesOfCorrectTypeRule:                   {astvalidation.Values()},
 	VariablesAreInputTypesRule:                {astvalidation.VariablesAreInputTypes()},
 	KnownTypeNamesOperationRule:               {astvalidation.VariablesAreInputTypes(), astvalidation.Fragments()},
-	VariablesInAllowedPositionRule:            {astvalidation.ValidArguments(), astvalidation.Values()},
+	VariablesInAllowedPositionRule:            {astvalidation.Values()},
 
 	// fragments rules
 	FragmentsOnCompositeTypesRule: {astvalidation.Fragments()},