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--- a/README.md
+++ b/README.md
@@ -2,4 +2,6 @@
 
 This is a script which takes an archive exported from a Mastodon account, looks for media attachments and uses them to build an archive for a Gemini server.
 
-I use it to update the [Glossatory archives](gemini://gemini.mikelynch.org/glossatory/) and there's still a few things hard-coded in it which I haven't moved out to a config file, specifically the regular expressions which match attachment URLs and pull bits of text out for the index links.
\ No newline at end of file
+I use it to update the [Glossatory archives](gemini://gemini.mikelynch.org/glossatory/) and it assumes that all of the media attachments have a name with
+two parts you want to pull out of it and use as the human-readable form of the
+index.