2 files changed, 29 insertions, 1 deletions
diff --git a/cli/tsc/99_main_compiler.js b/cli/tsc/99_main_compiler.js
index f8eabc890..c84c2365c 100644
--- a/cli/tsc/99_main_compiler.js
+++ b/cli/tsc/99_main_compiler.js
@@ -594,6 +594,22 @@ delete Object.prototype.__proto__;
           ),
         );
       }
+      case "getCompletionDetails": {
+        debug("request", request);
+        return respond(
+          id,
+          languageService.getCompletionEntryDetails(
+            request.args.specifier,
+            request.args.position,
+            request.args.name,
+            undefined,
+            request.args.source,
+            undefined,
+            // @ts-expect-error this exists in 4.3 but not part of the d.ts
+            request.args.data,
+          ),
+        );
+      }
       case "getCompletions": {
         return respond(
           id,
diff --git a/cli/tsc/compiler.d.ts b/cli/tsc/compiler.d.ts
index d37b56c06..a3200469c 100644
--- a/cli/tsc/compiler.d.ts
+++ b/cli/tsc/compiler.d.ts
@@ -51,6 +51,7 @@ declare global {
     | GetAsset
     | GetCodeFixes
     | GetCombinedCodeFix
+    | GetCompletionDetails
     | GetCompletionsRequest
     | GetDefinitionRequest
     | GetDiagnosticsRequest
@@ -102,11 +103,22 @@ declare global {
     fixId: {};
   }
 
+  interface GetCompletionDetails extends BaseLanguageServerRequest {
+    method: "getCompletionDetails";
+    args: {
+      specifier: string;
+      position: number;
+      name: string;
+      source?: string;
+      data?: unknown;
+    };
+  }
+
   interface GetCompletionsRequest extends BaseLanguageServerRequest {
     method: "getCompletions";
     specifier: string;
     position: number;
-    preferences: ts.UserPreferences;
+    preferences: ts.GetCompletionsAtPositionOptions;
   }
 
   interface GetDiagnosticsRequest extends BaseLanguageServerRequest {