diff --git a/middleman-core/lib/middleman-core/core_extensions/front_matter.rb b/middleman-core/lib/middleman-core/core_extensions/front_matter.rb
index 03d2f431..d685e994 100644
--- a/middleman-core/lib/middleman-core/core_extensions/front_matter.rb
+++ b/middleman-core/lib/middleman-core/core_extensions/front_matter.rb
@@ -12,7 +12,7 @@ require 'middleman-core/util/data'
 module Middleman::CoreExtensions
   class FrontMatter < ::Middleman::Extension
     # Try to run after routing but before directory_indexes
-    self.resource_list_manipulator_priority = 90
+    self.resource_list_manipulator_priority = 10
 
     def initialize(app, options_hash={}, &block)
       super
diff --git a/middleman-core/lib/middleman-core/sitemap/extensions/ignores.rb b/middleman-core/lib/middleman-core/sitemap/extensions/ignores.rb
index 9ba53899..0e54b2c2 100644
--- a/middleman-core/lib/middleman-core/sitemap/extensions/ignores.rb
+++ b/middleman-core/lib/middleman-core/sitemap/extensions/ignores.rb
@@ -3,6 +3,8 @@ module Middleman
     module Extensions
       # Class to handle managing ignores
       class Ignores < Extension
+        self.resource_list_manipulator_priority = 0
+
         # Expose `create_ignore` as `app.ignore`
         expose_to_application ignore: :create_ignore
 
diff --git a/middleman-core/lib/middleman-core/sitemap/extensions/on_disk.rb b/middleman-core/lib/middleman-core/sitemap/extensions/on_disk.rb
index ba8f656e..a0d03400 100644
--- a/middleman-core/lib/middleman-core/sitemap/extensions/on_disk.rb
+++ b/middleman-core/lib/middleman-core/sitemap/extensions/on_disk.rb
@@ -5,6 +5,8 @@ module Middleman
   module Sitemap
     module Extensions
       class OnDisk < Extension
+        self.resource_list_manipulator_priority = 0
+
         def initialize(app, config={}, &block)
           super
 
diff --git a/middleman-core/lib/middleman-core/sitemap/extensions/proxies.rb b/middleman-core/lib/middleman-core/sitemap/extensions/proxies.rb
index 78d6e17a..0285726f 100644
--- a/middleman-core/lib/middleman-core/sitemap/extensions/proxies.rb
+++ b/middleman-core/lib/middleman-core/sitemap/extensions/proxies.rb
@@ -7,6 +7,8 @@ module Middleman
       # Manages the list of proxy configurations and manipulates the sitemap
       # to include new resources based on those configurations
       class Proxies < Extension
+        self.resource_list_manipulator_priority = 0
+
         # Expose `create_proxy` as `app.proxy`
         expose_to_application proxy: :create_proxy
 
@@ -83,7 +85,16 @@ module Middleman
       end
     end
 
+    class Resource
+      def proxy_to(path)
+        throw "Resource#proxy_to has been removed. Use ProxyResource class instead."
+      end
+    end
+
     class ProxyResource < ::Middleman::Sitemap::Resource
+      Contract String
+      attr_reader :target
+
       # Initialize resource with parent store and URL
       # @param [Middleman::Sitemap::Store] store
       # @param [String] path
@@ -119,6 +130,10 @@ module Middleman
         target_resource.file_descriptor
       end
 
+      def metadata
+        target_resource.metadata.deep_merge super
+      end
+
       Contract Maybe[String]
       def content_type
         mime_type = super
diff --git a/middleman-core/lib/middleman-core/sitemap/extensions/redirects.rb b/middleman-core/lib/middleman-core/sitemap/extensions/redirects.rb
index e42d34dc..dc0c74f9 100644
--- a/middleman-core/lib/middleman-core/sitemap/extensions/redirects.rb
+++ b/middleman-core/lib/middleman-core/sitemap/extensions/redirects.rb
@@ -7,6 +7,8 @@ module Middleman
       # Manages the list of proxy configurations and manipulates the sitemap
       # to include new resources based on those configurations
       class Redirects < Extension
+        self.resource_list_manipulator_priority = 0
+
         # Expose `create_redirect` to config as `redirect`
         expose_to_config redirect: :create_redirect
 
diff --git a/middleman-core/lib/middleman-core/sitemap/extensions/request_endpoints.rb b/middleman-core/lib/middleman-core/sitemap/extensions/request_endpoints.rb
index fc66cd71..245df873 100644
--- a/middleman-core/lib/middleman-core/sitemap/extensions/request_endpoints.rb
+++ b/middleman-core/lib/middleman-core/sitemap/extensions/request_endpoints.rb
@@ -4,6 +4,8 @@ module Middleman
   module Sitemap
     module Extensions
       class RequestEndpoints < Extension
+        self.resource_list_manipulator_priority = 0
+
         # Expose `create_endpoint` to config as `endpoint`
         expose_to_config endpoint: :create_endpoint
 
diff --git a/middleman-core/lib/middleman-core/sitemap/store.rb b/middleman-core/lib/middleman-core/sitemap/store.rb
index 129fa9b5..f7af3bd2 100644
--- a/middleman-core/lib/middleman-core/sitemap/store.rb
+++ b/middleman-core/lib/middleman-core/sitemap/store.rb
@@ -188,6 +188,7 @@ module Middleman
           @app.logger.debug '== Rebuilding resource list'
 
           @resources = @resource_list_manipulators.reduce([]) do |result, m|
+            @app.logger.debug "== Running manipulator: #{m[:name]}"
             newres = m[:manipulator].send(m[:custom_name] || :manipulate_resource_list, result)
 
             # Reset lookup cache