diff --git a/lib/prism/deprecated.rb b/lib/prism/deprecated.rb
deleted file mode 100644
index 332aed76df..0000000000
--- a/lib/prism/deprecated.rb
+++ /dev/null
@@ -1,108 +0,0 @@
-# frozen_string_literal: true
-# :markup: markdown
-#--
-# rbs_inline: enabled
-
-module Prism
-  class InNode < Node
-    #: () -> String
-    def in # :nodoc
-      in_keyword
-    end
-
-    #: () -> Location
-    def in_loc # :nodoc
-      in_keyword_loc
-    end
-
-    #: () -> String?
-    def then # :nodoc
-      then_keyword
-    end
-
-    #: () -> Location?
-    def then_loc # :nodoc
-      then_keyword_loc
-    end
-  end
-
-  class MatchPredicateNode < Node
-    #: () -> String
-    def operator # :nodoc
-      keyword
-    end
-
-    #: () -> Location
-    def operator_loc # :nodoc
-      keyword_loc
-    end
-  end
-
-  class UnlessNode < Node
-    #: () -> String
-    def keyword # :nodoc
-      unless_keyword
-    end
-
-    #: () -> Location
-    def keyword_loc # :nodoc
-      unless_keyword_loc
-    end
-  end
-
-  class UntilNode < Node
-    #: () -> String
-    def keyword # :nodoc
-      until_keyword
-    end
-
-    #: () -> Location
-    def keyword_loc # :nodoc
-      until_keyword_loc
-    end
-
-    #: () -> String?
-    def closing # :nodoc
-      end_keyword
-    end
-
-    #: () -> Location?
-    def closing_loc # :nodoc
-      end_keyword_loc
-    end
-  end
-
-  class WhenNode < Node
-    #: () -> String
-    def keyword # :nodoc
-      when_keyword
-    end
-
-    #: () -> Location
-    def keyword_loc # :nodoc
-      when_keyword_loc
-    end
-  end
-
-  class WhileNode < Node
-    #: () -> String
-    def keyword # :nodoc
-      while_keyword
-    end
-
-    #: () -> Location
-    def keyword_loc # :nodoc
-      while_keyword_loc
-    end
-
-    #: () -> String?
-    def closing # :nodoc
-      end_keyword
-    end
-
-    #: () -> Location?
-    def closing_loc # :nodoc
-      end_keyword_loc
-    end
-  end
-end
diff --git a/lib/prism/node_ext.rb b/lib/prism/node_ext.rb
index 8a6624e76d..94aa3bff8e 100644
--- a/lib/prism/node_ext.rb
+++ b/lib/prism/node_ext.rb
@@ -385,4 +385,106 @@ def full_message_loc
       attribute_write? ? message_loc&.adjoin("=") : message_loc
     end
   end
+
+  class InNode < Node
+    #: () -> String
+    def in # :nodoc
+      in_keyword
+    end
+
+    #: () -> Location
+    def in_loc # :nodoc
+      in_keyword_loc
+    end
+
+    #: () -> String?
+    def then # :nodoc
+      then_keyword
+    end
+
+    #: () -> Location?
+    def then_loc # :nodoc
+      then_keyword_loc
+    end
+  end
+
+  class MatchPredicateNode < Node
+    #: () -> String
+    def operator # :nodoc
+      keyword
+    end
+
+    #: () -> Location
+    def operator_loc # :nodoc
+      keyword_loc
+    end
+  end
+
+  class UnlessNode < Node
+    #: () -> String
+    def keyword # :nodoc
+      unless_keyword
+    end
+
+    #: () -> Location
+    def keyword_loc # :nodoc
+      unless_keyword_loc
+    end
+  end
+
+  class UntilNode < Node
+    #: () -> String
+    def keyword # :nodoc
+      until_keyword
+    end
+
+    #: () -> Location
+    def keyword_loc # :nodoc
+      until_keyword_loc
+    end
+
+    #: () -> String?
+    def closing # :nodoc
+      end_keyword
+    end
+
+    #: () -> Location?
+    def closing_loc # :nodoc
+      end_keyword_loc
+    end
+  end
+
+  class WhenNode < Node
+    #: () -> String
+    def keyword # :nodoc
+      when_keyword
+    end
+
+    #: () -> Location
+    def keyword_loc # :nodoc
+      when_keyword_loc
+    end
+  end
+
+  class WhileNode < Node
+    #: () -> String
+    def keyword # :nodoc
+      while_keyword
+    end
+
+    #: () -> Location
+    def keyword_loc # :nodoc
+      while_keyword_loc
+    end
+
+    #: () -> String?
+    def closing # :nodoc
+      end_keyword
+    end
+
+    #: () -> Location?
+    def closing_loc # :nodoc
+      end_keyword_loc
+    end
+  end
 end
diff --git a/prism.gemspec b/prism.gemspec
index 709eb83a82..c18d68f4d8 100644
--- a/prism.gemspec
+++ b/prism.gemspec
@@ -109,7 +109,6 @@ Gem::Specification.new do |spec|
     "include/prism/version.h",
     "lib/prism.rb",
     "lib/prism/compiler.rb",
-    "lib/prism/deprecated.rb",
     "lib/prism/desugar_compiler.rb",
     "lib/prism/dispatcher.rb",
     "lib/prism/dot_visitor.rb",
@@ -179,7 +178,6 @@ Gem::Specification.new do |spec|
     "rbi/rubyvm/node_find.rbi",
     "sig/generated/prism.rbs",
     "sig/generated/prism/compiler.rbs",
-    "sig/generated/prism/deprecated.rbs",
     "sig/generated/prism/desugar_compiler.rbs",
     "sig/generated/prism/dispatcher.rbs",
     "sig/generated/prism/dot_visitor.rbs",
diff --git a/sig/generated/prism/node_ext.rbs b/sig/generated/prism/node_ext.rbs
index dabcdb0590..be8cc59abc 100644
--- a/sig/generated/prism/node_ext.rbs
+++ b/sig/generated/prism/node_ext.rbs
@@ -212,4 +212,70 @@ module Prism
     # : () -> Location?
     def full_message_loc: () -> Location?
   end
+
+  class InNode < Node
+    # : () -> String
+    def in: () -> String
+
+    # : () -> Location
+    def in_loc: () -> Location
+
+    # : () -> String?
+    def then: () -> String?
+
+    # : () -> Location?
+    def then_loc: () -> Location?
+  end
+
+  class MatchPredicateNode < Node
+    # : () -> String
+    def operator: () -> String
+
+    # : () -> Location
+    def operator_loc: () -> Location
+  end
+
+  class UnlessNode < Node
+    # : () -> String
+    def keyword: () -> String
+
+    # : () -> Location
+    def keyword_loc: () -> Location
+  end
+
+  class UntilNode < Node
+    # : () -> String
+    def keyword: () -> String
+
+    # : () -> Location
+    def keyword_loc: () -> Location
+
+    # : () -> String?
+    def closing: () -> String?
+
+    # : () -> Location?
+    def closing_loc: () -> Location?
+  end
+
+  class WhenNode < Node
+    # : () -> String
+    def keyword: () -> String
+
+    # : () -> Location
+    def keyword_loc: () -> Location
+  end
+
+  class WhileNode < Node
+    # : () -> String
+    def keyword: () -> String
+
+    # : () -> Location
+    def keyword_loc: () -> Location
+
+    # : () -> String?
+    def closing: () -> String?
+
+    # : () -> Location?
+    def closing_loc: () -> Location?
+  end
 end