diff --git a/internal/rosa/all.go b/internal/rosa/all.go
index 28a0ac9..8b2aec1 100644
--- a/internal/rosa/all.go
+++ b/internal/rosa/all.go
@@ -120,8 +120,8 @@ const (
 	Zlib
 	Zstd
 
-	// _presetUnexportedStart is the first unexported preset.
-	_presetUnexportedStart
+	// PresetUnexportedStart is the first unexported preset.
+	PresetUnexportedStart
 
 	buildcatrust = iota - 1
 	utilMacros
@@ -137,8 +137,8 @@ const (
 	// part of the [Std] toolchain.
 	Stage0
 
-	// _presetEnd is the total number of presets and does not denote a preset.
-	_presetEnd
+	// PresetEnd is the total number of presets and does not denote a preset.
+	PresetEnd
 )
 
 // Metadata is stage-agnostic information of a [PArtifact] not directly
@@ -159,7 +159,7 @@ const Unversioned = "\x00"
 
 var (
 	// artifactsM is an array of [PArtifact] metadata.
-	artifactsM [_presetEnd]Metadata
+	artifactsM [PresetEnd]Metadata
 
 	// artifacts stores the result of Metadata.f.
 	artifacts [_toolchainEnd][len(artifactsM)]pkg.Artifact
@@ -190,7 +190,7 @@ func (t Toolchain) Version(p PArtifact) string {
 
 // ResolveName returns a [PArtifact] by name.
 func ResolveName(name string) (p PArtifact, ok bool) {
-	for i := range _presetUnexportedStart {
+	for i := range PresetUnexportedStart {
 		if name == artifactsM[i].Name {
 			return i, true
 		}
diff --git a/internal/rosa/all_test.go b/internal/rosa/all_test.go
index 2791402..08d2d2c 100644
--- a/internal/rosa/all_test.go
+++ b/internal/rosa/all_test.go
@@ -1,19 +1,20 @@
-package rosa
+package rosa_test
 
-import "testing"
+import (
+	"testing"
 
-// PresetEnd is the total PArtifact count exported for testing.
-const PresetEnd = _presetEnd
+	"hakurei.app/internal/rosa"
+)
 
 func TestLoad(t *testing.T) {
 	t.Parallel()
 
-	for i := range _presetEnd {
-		p := PArtifact(i)
-		t.Run(GetMetadata(p).Name, func(t *testing.T) {
+	for i := range rosa.PresetEnd {
+		p := rosa.PArtifact(i)
+		t.Run(rosa.GetMetadata(p).Name, func(t *testing.T) {
 			t.Parallel()
 
-			Std.Load(p)
+			rosa.Std.Load(p)
 		})
 	}
 }
@@ -21,13 +22,13 @@ func TestLoad(t *testing.T) {
 func TestResolveName(t *testing.T) {
 	t.Parallel()
 
-	for i := range _presetUnexportedStart {
+	for i := range rosa.PresetUnexportedStart {
 		p := i
-		name := GetMetadata(p).Name
+		name := rosa.GetMetadata(p).Name
 		t.Run(name, func(t *testing.T) {
 			t.Parallel()
 
-			if got, ok := ResolveName(name); !ok {
+			if got, ok := rosa.ResolveName(name); !ok {
 				t.Fatal("ResolveName: ok = false")
 			} else if got != p {
 				t.Fatalf("ResolveName: %d, want %d", got, p)
@@ -38,13 +39,13 @@ func TestResolveName(t *testing.T) {
 func TestResolveNameUnexported(t *testing.T) {
 	t.Parallel()
 
-	for i := _presetUnexportedStart; i < _presetEnd; i++ {
+	for i := rosa.PresetUnexportedStart; i < rosa.PresetEnd; i++ {
 		p := i
-		name := GetMetadata(p).Name
+		name := rosa.GetMetadata(p).Name
 		t.Run(name, func(t *testing.T) {
 			t.Parallel()
 
-			if got, ok := ResolveName(name); ok {
+			if got, ok := rosa.ResolveName(name); ok {
 				t.Fatalf("ResolveName: resolved unexported preset %d", got)
 			}
 		})