diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index 1a6214b47aae8..f82e9b4b2f18f 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -553,7 +553,17 @@ def synced_with_other_formulae?
   # ```ruby
   # resource("additional_files").stage { bin.install "my/extra/tool" }
   # ```
-  delegate resource: :active_spec
+  #
+  # FIXME: This should not actually take a block. All resources should be defined
+  #        at the top-level using {Formula.resource} instead
+  #        (see https://github.com/Homebrew/brew/issues/17203#issuecomment-2093654431).
+  #
+  # @api public
+  sig {
+    params(name: String, klass: T.class_of(Resource), block: T.nilable(T.proc.bind(Resource).void))
+      .returns(T.nilable(Resource))
+  }
+  def resource(name, klass = Resource, &block) = active_spec.resource(name, klass, &block)
 
   # An old name for the formula.
   sig { returns(T.nilable(String)) }
@@ -3710,6 +3720,7 @@ def head(val = nil, specs = {}, &block)
     # ```
     #
     # @api public
+    sig { params(name: String, klass: T.class_of(Resource), block: T.nilable(T.proc.bind(Resource).void)).void }
     def resource(name, klass = Resource, &block)
       specs.each do |spec|
         spec.resource(name, klass, &block) unless spec.resource_defined?(name)
diff --git a/Library/Homebrew/software_spec.rb b/Library/Homebrew/software_spec.rb
index cc1d0a65d6add..400540d0565d1 100644
--- a/Library/Homebrew/software_spec.rb
+++ b/Library/Homebrew/software_spec.rb
@@ -123,6 +123,10 @@ def resource_defined?(name)
     resources.key?(name)
   end
 
+  sig {
+    params(name: String, klass: T.class_of(Resource), block: T.nilable(T.proc.bind(Resource).void))
+      .returns(T.nilable(Resource))
+  }
   def resource(name, klass = Resource, &block)
     if block
       raise DuplicateResourceError, name if resource_defined?(name)
@@ -132,6 +136,7 @@ def resource(name, klass = Resource, &block)
 
       resources[name] = res
       dependency_collector.add(res)
+      res
     else
       resources.fetch(name) { raise ResourceMissingError.new(owner, name) }
     end
diff --git a/Library/Homebrew/sorbet/rbi/parlour.rbi b/Library/Homebrew/sorbet/rbi/parlour.rbi
index 57ef1b863ebc6..aee33eadc2d47 100644
--- a/Library/Homebrew/sorbet/rbi/parlour.rbi
+++ b/Library/Homebrew/sorbet/rbi/parlour.rbi
@@ -80,9 +80,6 @@ class Formula
   sig { params(args: T.untyped, options: T.untyped, block: T.untyped).returns(T::Boolean) }
   def loaded_from_api?(*args, **options, &block); end
 
-  sig { params(args: T.untyped, options: T.untyped, block: T.untyped).returns(T.untyped) }
-  def resource(*args, **options, &block); end
-
   sig { params(args: T.untyped, options: T.untyped, block: T.untyped).returns(T.untyped) }
   def deps(*args, **options, &block); end