diff --git a/prometeu-lsp/prometeu-lsp-v1/src/test/java/p/studio/lsp/services/compiler/CompilerLanguageServiceBridgeTest.java b/prometeu-lsp/prometeu-lsp-v1/src/test/java/p/studio/lsp/services/compiler/CompilerLanguageServiceBridgeTest.java
index 319dc6ef..bf8f6ba4 100644
--- a/prometeu-lsp/prometeu-lsp-v1/src/test/java/p/studio/lsp/services/compiler/CompilerLanguageServiceBridgeTest.java
+++ b/prometeu-lsp/prometeu-lsp-v1/src/test/java/p/studio/lsp/services/compiler/CompilerLanguageServiceBridgeTest.java
@@ -6,6 +6,7 @@ import p.studio.lsp.messages.LspProjectContext;
 
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.util.List;
 
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertEquals;
@@ -142,8 +143,9 @@ class CompilerLanguageServiceBridgeTest {
                 overlay,
                 hoverPosition.line(),
                 hoverPosition.character());
-        assertTrue(hover.markdown().contains("blend(arg0: int, arg1: int) -> int"));
+        assertTrue(hover.markdown().contains("blend(dx: int, dy: int) -> int"));
         assertTrue(hover.markdown().contains("**method**"));
+        assertFalse(hover.markdown().contains("arg0"));
 
         final var functionSignatureHelp = bridge.signatureHelp(
                 context,
@@ -163,6 +165,60 @@ class CompilerLanguageServiceBridgeTest {
         assertEquals("Vec()", constructorSignatureHelp.signatures().getFirst().label());
     }
 
+    @Test
+    void completionHoverAndSignatureHelpUseStdlibSemanticParameterNames() {
+        final Path projectRoot = findRepoRoot(Path.of("").toAbsolutePath().normalize())
+                .resolve("test-projects")
+                .resolve("main")
+                .toAbsolutePath()
+                .normalize();
+        final Path documentPath = projectRoot.resolve("src").resolve("main.pbs");
+        final String overlay = """
+                import { Gfx } from @sdk:gfx;
+
+                fn frame() -> void {
+                  Gfx.clear_565(5);
+                }
+                """;
+        final CompilerLanguageServiceBridge bridge = new CompilerLanguageServiceBridge();
+        final LspProjectContext context = new LspProjectContext("main", "pbs", projectRoot);
+        final DocumentPositionMapper mapper = new DocumentPositionMapper(overlay);
+        final var memberPosition = mapper.positionOf(overlay.indexOf("clear_565"));
+        final var signaturePosition = mapper.positionOf(overlay.indexOf("5);"));
+
+        final var completion = bridge.completion(
+                context,
+                documentPath.toUri().toString(),
+                overlay,
+                memberPosition.line(),
+                memberPosition.character());
+        final var clear565Completion = completion.items().stream()
+                .filter(item -> item.label().equals("clear_565"))
+                .findFirst()
+                .orElseThrow();
+        assertEquals("clear_565(color_565: int) -> void", clear565Completion.detail());
+        assertFalse(clear565Completion.detail().contains("arg0"));
+
+        final var hover = bridge.hover(
+                context,
+                documentPath.toUri().toString(),
+                overlay,
+                memberPosition.line(),
+                memberPosition.character());
+        assertTrue(hover.markdown().contains("clear_565(color_565: int) -> void"));
+        assertFalse(hover.markdown().contains("arg0"));
+
+        final var signatureHelp = bridge.signatureHelp(
+                context,
+                documentPath.toUri().toString(),
+                overlay,
+                signaturePosition.line(),
+                signaturePosition.character());
+        assertEquals("clear_565(color_565: int) -> void", signatureHelp.signatures().getFirst().label());
+        assertEquals(List.of("color_565: int"), signatureHelp.signatures().getFirst().parameters());
+        assertFalse(signatureHelp.signatures().getFirst().label().contains("arg0"));
+    }
+
     @Test
     void describeServerPublishesFrontendVisualThemes() {
         final CompilerLanguageServiceBridge bridge = new CompilerLanguageServiceBridge();
diff --git a/prometeu-lsp/prometeu-lsp-v1/src/test/java/p/studio/lsp/services/protocol/mapping/Lsp4jProtocolMessageMapperTest.java b/prometeu-lsp/prometeu-lsp-v1/src/test/java/p/studio/lsp/services/protocol/mapping/Lsp4jProtocolMessageMapperTest.java
index 78516e5b..80e91e7f 100644
--- a/prometeu-lsp/prometeu-lsp-v1/src/test/java/p/studio/lsp/services/protocol/mapping/Lsp4jProtocolMessageMapperTest.java
+++ b/prometeu-lsp/prometeu-lsp-v1/src/test/java/p/studio/lsp/services/protocol/mapping/Lsp4jProtocolMessageMapperTest.java
@@ -19,6 +19,7 @@ import java.util.List;
 import java.util.Map;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertInstanceOf;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
@@ -86,6 +87,7 @@ final class Lsp4jProtocolMessageMapperTest {
         assertEquals(1, completion.getItems().size());
         assertEquals("blend", completion.getItems().getFirst().getLabel());
         assertEquals("blend(dx: int, dy: int) -> int", completion.getItems().getFirst().getDetail());
+        assertFalse(completion.getItems().getFirst().getDetail().contains("arg0"));
         final var documentation = assertInstanceOf(Either.class, completion.getItems().getFirst().getDocumentation());
         assertTrue(documentation.isRight());
 
@@ -98,6 +100,8 @@ final class Lsp4jProtocolMessageMapperTest {
                 1));
         assertEquals(1, signatureHelp.getSignatures().size());
         assertEquals("mix(left: int, right: int) -> int", signatureHelp.getSignatures().getFirst().getLabel());
+        assertFalse(signatureHelp.getSignatures().getFirst().getLabel().contains("arg0"));
+        assertEquals("left: int", signatureHelp.getSignatures().getFirst().getParameters().getFirst().getLabel().getLeft());
         assertEquals(1, signatureHelp.getActiveParameter());
     }
 }