Hi zimoun,
> The update of Mumi adds a GraphQL thing to issues.guix.gnu.org, IIUC. Yes, with the update, Mumi will have a GraphQL API. GraphQL APIs are more flexible than traditional REST APIs. See https://graphql.org/ for more. At some point, I plan to add support for identifying a message just by its Message-ID. IIRC, zimoun requested this feature once. With this, I hope to write a simple 'mumi send-email' program or similar, that will let us send a patchset to mumi all in one go without inadvertently opening multiple issues. Cheers, Arun