diff --git a/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/cir/factory/CirTypeFactory.kt b/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/cir/factory/CirTypeFactory.kt
index f91c2ab16f0..688baeef93a 100644
--- a/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/cir/factory/CirTypeFactory.kt
+++ b/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/cir/factory/CirTypeFactory.kt
@@ -17,7 +17,7 @@ import org.jetbrains.kotlin.types.*
 object CirTypeFactory {
     object StandardTypes {
         val ANY: CirClassType = createClassType(
-            classId = ANY_CID,
+            classId = ANY_CLASS_ID,
             outerType = null,
             visibility = DescriptorVisibilities.PUBLIC,
             arguments = emptyList(),
diff --git a/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/core/AnnotationsCommonizer.kt b/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/core/AnnotationsCommonizer.kt
index 747560f9224..9d2be91f9d1 100644
--- a/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/core/AnnotationsCommonizer.kt
+++ b/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/core/AnnotationsCommonizer.kt
@@ -10,7 +10,7 @@ import org.jetbrains.kotlin.descriptors.commonizer.cir.CirAnnotation
 import org.jetbrains.kotlin.descriptors.commonizer.cir.factory.CirAnnotationFactory
 import org.jetbrains.kotlin.descriptors.commonizer.cir.factory.CirTypeFactory
 import org.jetbrains.kotlin.descriptors.commonizer.core.AnnotationsCommonizer.Companion.FALLBACK_MESSAGE
-import org.jetbrains.kotlin.descriptors.commonizer.utils.DEPRECATED_ANNOTATION_CID
+import org.jetbrains.kotlin.descriptors.commonizer.utils.DEPRECATED_ANNOTATION_CLASS_ID
 import org.jetbrains.kotlin.descriptors.commonizer.utils.compactMap
 import org.jetbrains.kotlin.descriptors.commonizer.utils.compactMapOf
 import org.jetbrains.kotlin.descriptors.commonizer.utils.intern
@@ -38,7 +38,7 @@ class AnnotationsCommonizer : AbstractStandardCommonizer<List<CirAnnotation>, Li
     override fun initialize(first: List<CirAnnotation>) = Unit
 
     override fun doCommonizeWith(next: List<CirAnnotation>): Boolean {
-        val nextDeprecatedAnnotation = next.firstOrNull { it.type.classifierId == DEPRECATED_ANNOTATION_CID } ?: return true
+        val nextDeprecatedAnnotation = next.firstOrNull { it.type.classifierId == DEPRECATED_ANNOTATION_CLASS_ID } ?: return true
 
         val deprecatedAnnotationCommonizer = deprecatedAnnotationCommonizer
             ?: DeprecatedAnnotationCommonizer().also { this.deprecatedAnnotationCommonizer = it }
@@ -148,14 +148,14 @@ private class DeprecatedAnnotationCommonizer : Commonizer<CirAnnotation, CirAnno
         ).associateWith { StringValue(it) }
         private val FALLBACK_MESSAGE_VALUE = StringValue(FALLBACK_MESSAGE)
 
-        private val DEPRECATED_ANNOTATION_TYPE = buildAnnotationType(DEPRECATED_ANNOTATION_CID)
+        private val DEPRECATED_ANNOTATION_TYPE = buildAnnotationType(DEPRECATED_ANNOTATION_CLASS_ID)
         private val REPLACE_WITH_ANNOTATION_TYPE = buildAnnotationType(internedClassId(FqName(ReplaceWith::class.java.name)))
 
-        private val DEPRECATION_LEVEL_CID = internedClassId(FqName(DeprecationLevel::class.java.name))
+        private val DEPRECATION_LEVEL_CLASS_ID = internedClassId(FqName(DeprecationLevel::class.java.name))
 
         // Optimization: Keep DeprecationLevel enum constants.
         private val DEPRECATION_LEVEL_ENUM_ENTRY_VALUES: Map<String, EnumValue> = DeprecationLevel.values().associate {
-            it.name to EnumValue(DEPRECATION_LEVEL_CID, Name.identifier(it.name).intern())
+            it.name to EnumValue(DEPRECATION_LEVEL_CLASS_ID, Name.identifier(it.name).intern())
         }
 
         private fun buildAnnotationType(classId: ClassId) = CirTypeFactory.createClassType(
diff --git a/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/core/CommonizationVisitor.kt b/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/core/CommonizationVisitor.kt
index df4c0cc0daa..d69afd980bf 100644
--- a/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/core/CommonizationVisitor.kt
+++ b/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/core/CommonizationVisitor.kt
@@ -153,7 +153,7 @@ internal class CommonizationVisitor(
         }.orEmpty()
 
         setSupertypes(
-            if (commonSupertypes.isEmpty() && classId !in SPECIAL_CLASS_WITHOUT_SUPERTYPES_CIDS)
+            if (commonSupertypes.isEmpty() && classId !in SPECIAL_CLASS_WITHOUT_SUPERTYPES_CLASS_IDS)
                 listOf(CirTypeFactory.StandardTypes.ANY)
             else
                 commonSupertypes
diff --git a/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/metadata/utils/SerializedMetadataLibraryProvider.kt b/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/metadata/utils/SerializedMetadataLibraryProvider.kt
index 2045b9f2c17..1970abf8c8b 100644
--- a/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/metadata/utils/SerializedMetadataLibraryProvider.kt
+++ b/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/metadata/utils/SerializedMetadataLibraryProvider.kt
@@ -7,12 +7,16 @@ package org.jetbrains.kotlin.descriptors.commonizer.metadata.utils
 
 import kotlinx.metadata.klib.KlibModuleMetadata
 
+private typealias FragmentPartContents = ByteArray
+private typealias ListOfFragmentParts = List<FragmentPartContents>
+private typealias MapOfFragmentParts = Map<String, FragmentPartContents>
+
 class SerializedMetadataLibraryProvider(
     override val moduleHeaderData: ByteArray,
-    fragments: List<List<ByteArray>>,
+    fragments: List<ListOfFragmentParts>,
     fragmentNames: List<String>
 ) : KlibModuleMetadata.MetadataLibraryProvider {
-    private val fragmentMap: Map<String, Map<String, ByteArray>>
+    private val fragmentMap: Map<String, MapOfFragmentParts>
 
     init {
         check(fragments.size == fragmentNames.size)
@@ -21,11 +25,11 @@ class SerializedMetadataLibraryProvider(
             // fragmentName is package FQ name, fragmentShortName is right-most part of package FQ name
             val fragmentShortName = fragmentName.substringAfterLast('.')
 
-            val fragmentParts = fragments[fragmentIndex]
+            val fragmentParts: ListOfFragmentParts = fragments[fragmentIndex]
             val digitCount = fragmentParts.size.toString().length
 
             // N.B. the same fragment part numbering scheme as in org.jetbrains.kotlin.library.impl.MetadataWriterImpl
-            val fragmentPartMap = fragmentParts.mapIndexed { partIndex, part ->
+            val fragmentPartMap: MapOfFragmentParts = fragmentParts.mapIndexed { partIndex, part ->
                 val partName = partIndex.toString().padStart(digitCount, '0') + "_" + fragmentShortName
                 partName to part
             }.toMap()
@@ -38,7 +42,7 @@ class SerializedMetadataLibraryProvider(
         return fragmentMap.getValue(fqName).keys
     }
 
-    override fun packageMetadata(fqName: String, partName: String): ByteArray {
+    override fun packageMetadata(fqName: String, partName: String): FragmentPartContents {
         return fragmentMap.getValue(fqName).getValue(partName)
     }
 }
diff --git a/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/utils/fqName.kt b/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/utils/fqName.kt
index 91aa52b71d5..aab396b9249 100644
--- a/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/utils/fqName.kt
+++ b/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/utils/fqName.kt
@@ -14,14 +14,14 @@ import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.serialization.konan.impl.ForwardDeclarationsFqNames
 
 internal val DEPRECATED_ANNOTATION_FQN: FqName = FqName(Deprecated::class.java.name).intern()
-internal val DEPRECATED_ANNOTATION_CID: ClassId = internedClassId(DEPRECATED_ANNOTATION_FQN)
+internal val DEPRECATED_ANNOTATION_CLASS_ID: ClassId = internedClassId(DEPRECATED_ANNOTATION_FQN)
 
-internal val ANY_CID: ClassId = internedClassId(StandardNames.FqNames.any.toSafe().intern())
-private val NOTHING_CID: ClassId = internedClassId(StandardNames.FqNames.nothing.toSafe().intern())
+internal val ANY_CLASS_ID: ClassId = internedClassId(StandardNames.FqNames.any.toSafe().intern())
+private val NOTHING_CLASS_ID: ClassId = internedClassId(StandardNames.FqNames.nothing.toSafe().intern())
 
-internal val SPECIAL_CLASS_WITHOUT_SUPERTYPES_CIDS = listOf(
-    ANY_CID,
-    NOTHING_CID
+internal val SPECIAL_CLASS_WITHOUT_SUPERTYPES_CLASS_IDS = listOf(
+    ANY_CLASS_ID,
+    NOTHING_CLASS_ID
 )
 
 private val STANDARD_KOTLIN_PACKAGES = listOf(