1 files changed, 12 insertions, 0 deletions
diff --git a/lib/gitlab/markdown_cache.rb b/lib/gitlab/markdown_cache.rb
new file mode 100644
index 00000000000..0354c710a3f
--- /dev/null
+++ b/lib/gitlab/markdown_cache.rb
@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module MarkdownCache
+    # Increment this number every time the renderer changes its output
+    CACHE_COMMONMARK_VERSION_START  = 10
+    CACHE_COMMONMARK_VERSION        = 16
+
+    BaseError = Class.new(StandardError)
+    UnsupportedClassError = Class.new(BaseError)
+  end
+end