diff --git a/src/command_line.cc b/src/command_line.cc
index 23c19d969..12efb94bb 100644
--- a/src/command_line.cc
+++ b/src/command_line.cc
@@ -331,6 +331,7 @@ void LaunchStdinLoop(Config* config,
         case IpcId::TextDocumentCodeLens:
         case IpcId::WorkspaceDidChangeWatchedFiles:
         case IpcId::WorkspaceSymbol:
+        case IpcId::CqueryFileInfo:
         case IpcId::CqueryFreshenIndex:
         case IpcId::CqueryTypeHierarchyTree:
         case IpcId::CqueryCallTreeInitial:
diff --git a/src/ipc.cc b/src/ipc.cc
index ba7cee119..8fff915b5 100644
--- a/src/ipc.cc
+++ b/src/ipc.cc
@@ -66,6 +66,8 @@ const char* IpcIdToString(IpcId id) {
     case IpcId::CqueryPublishSemanticHighlighting:
       return "$cquery/publishSemanticHighlighting";
 
+    case IpcId::CqueryFileInfo:
+      return "$cquery/fileInfo";
     case IpcId::CqueryFreshenIndex:
       return "$cquery/freshenIndex";
     case IpcId::CqueryTypeHierarchyTree:
diff --git a/src/ipc.h b/src/ipc.h
index 59d820ecc..ffc8be20b 100644
--- a/src/ipc.h
+++ b/src/ipc.h
@@ -45,6 +45,7 @@ enum class IpcId : int {
   CqueryPublishSemanticHighlighting,
 
   // Custom messages
+  CqueryFileInfo,
   CqueryFreshenIndex,
   // Messages used in tree views.
   CqueryTypeHierarchyTree,
diff --git a/src/messages/cquery_file_info.cc b/src/messages/cquery_file_info.cc
new file mode 100644
index 000000000..1fa9998b3
--- /dev/null
+++ b/src/messages/cquery_file_info.cc
@@ -0,0 +1,44 @@
+#include "message_handler.h"
+#include "query_utils.h"
+#include "queue_manager.h"
+
+namespace {
+struct lsDocumentSymbolParams {
+  lsTextDocumentIdentifier textDocument;
+};
+MAKE_REFLECT_STRUCT(lsDocumentSymbolParams, textDocument);
+
+struct Ipc_CqueryFileInfo : public RequestMessage<Ipc_CqueryFileInfo> {
+  const static IpcId kIpcId = IpcId::CqueryFileInfo;
+  lsDocumentSymbolParams params;
+};
+MAKE_REFLECT_STRUCT(Ipc_CqueryFileInfo, id, params);
+REGISTER_IPC_MESSAGE(Ipc_CqueryFileInfo);
+
+struct Out_CqueryFileInfo : public lsOutMessage<Out_CqueryFileInfo> {
+  lsRequestId id;
+  QueryFile::Def result;
+};
+MAKE_REFLECT_STRUCT(Out_CqueryFileInfo, jsonrpc, id, result);
+
+struct CqueryFileInfoHandler : BaseMessageHandler<Ipc_CqueryFileInfo> {
+  void Run(Ipc_CqueryFileInfo* request) override {
+    QueryFile* file;
+    if (!FindFileOrFail(db, project, request->id,
+                        request->params.textDocument.uri.GetPath(), &file)) {
+      return;
+    }
+
+    Out_CqueryFileInfo out;
+    out.id = request->id;
+    // Expose some fields of |QueryFile::Def|.
+    out.result.path = file->def->path;
+    out.result.args = file->def->args;
+    out.result.language = file->def->language;
+    out.result.includes = file->def->includes;
+    out.result.inactive_regions = file->def->inactive_regions;
+    QueueManager::WriteStdout(IpcId::CqueryFileInfo, out);
+  }
+};
+REGISTER_MESSAGE_HANDLER(CqueryFileInfoHandler);
+}  // namespace
diff --git a/src/query.cc b/src/query.cc
index 6c451989b..f985c41d0 100644
--- a/src/query.cc
+++ b/src/query.cc
@@ -211,6 +211,7 @@ void CompareGroups(std::vector<T>& previous_data,
 QueryFile::DefUpdate BuildFileDefUpdate(const IdMap& id_map, const IndexFile& indexed) {
   QueryFile::Def def;
   def.path = indexed.path;
+  def.args = indexed.args;
   def.includes = indexed.includes;
   def.inactive_regions = indexed.skipped_by_preprocessor;
   def.dependencies = indexed.dependencies;
diff --git a/src/query.h b/src/query.h
index f1fa156b5..75f5b0840 100644
--- a/src/query.h
+++ b/src/query.h
@@ -96,6 +96,7 @@ struct QueryFamily {
 struct QueryFile {
   struct Def {
     std::string path;
+    std::vector<std::string> args;
     // Language identifier
     std::string language;
     // Includes in the file.
@@ -122,6 +123,7 @@ struct QueryFile {
 };
 MAKE_REFLECT_STRUCT(QueryFile::Def,
                     path,
+                    args,
                     language,
                     outline,
                     all_symbols,