piem

This library provides functionality for working with public-inbox
archives [1] within Emacs (e.g., applying a patch series to the
associated Git repository or downloading an mbox for the thread and
injecting it into a local Maildir directory).  The user option
`piem-inboxes' defines a set of public-inbox archives.  For most
the functions here to do something useful, the current buffer needs
to be linked to an inbox in that list, which requires enabling the
minor mode provided by at least one integration library (such as
`piem-gnus', `piem-eww', or `piem-notmuch').

[1] https://public-inbox.org/README