I mentioned the read-only directory optimization to Keith, and he
liked it but wanted to be able to configure it to be fully automated.
needs to re-tag messages based on a theoretical "auto-tags"
configuration file).
+Make "notmuch new" notice when a mail directory has gone more than a
+month without receiving new mail and use that to trigger the printing
+of the note that the user might want to mark the directory read-only.
+
+Also make "notmuch new" optionally able to just mark those month-old
+directories read-only on its own. (Could conflict with low-volume
+lists such as announce lists if they are setup to deliver to their own
+maildirs.)
+
notmuch library
---------------
Actually compile and install a libnotmuch shared library.