diff --git a/website/posts/codeberg.md b/website/posts/codeberg.md
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+title: Migrating to Codeberg
+date: 2025-05-12 14:00
+author: Ludovic Courtès
+tags: Community
+---
+
+The Guix project will be migrating all its repositories along with bug
+tracking and patch tracking to [Codeberg](https://codeberg.org) within a
+month.  This decision is the result of a collective consensus-building
+process that lasted several months.  This post shows the upcoming
+milestones in that migration and discusses what it will change for
+people using Guix and for contributors.
+
+![Codeberg logo.](/static/blog/img/codeberg-logo.svg)
+
+# Context
+
+For those who haven’t heard about it, Codeberg is a source code
+collaboration platform.  It is run by [Codeberg
+e.V.](https://docs.codeberg.org/getting-started/what-is-codeberg/#what-is-codeberg-e.v.%3F),
+a non-profit registered in Germany.  The software behind Codeberg is
+[Forgejo](https://forgejo.org/), a free software forge (licensed under
+GPLv3) supporting the “merge request” style of workflow familiar to many
+developers.
+
+Since its inception, Guix has been hosting its source code on
+[Savannah](https://savannah.gnu.org/projects/guix), with bug reports and
+patches handled by email, tracked by a [Debbugs
+instance](https://bugs.gnu.org), and visible on [the project’s
+tracker](https://issues.guix.gnu.org).  Debbugs and Savannah are hosted
+by the Free Software Foundation (FSF) though all three services are
+administered by volunteers.
+
+The motivation and the main parts of the migration are laid out in [the
+second Guix Consensus
+Document](https://archive.softwareheritage.org/browse/content/sha1_git:4d78cab341653e17db5f09beaf425f9634b5e81e/?origin_url=https://git.savannah.gnu.org/git/guix/guix-consensus-documents.git&path=002-codeberg.md)
+(GCD).  The GCD process itself was adopted just a few months ago; it’s a
+major milestone for the project that we’ll discuss in more detail in a
+future post.  Suffice to say that this GCD was [discussed and improved
+publicly for two months](https://issues.guix.gnu.org/76503), after which
+deliberation among members of [Guix
+teams](https://guix.gnu.org/manual/devel/en/html_node/Teams.html) led to
+[acceptance](https://codeberg.org/futurile/guix-org/src/branch/master/gcd-voting-summary/gcd002-voting-summary.md).
+
+# Milestones
+
+Migration to Codeberg will happen gradually.  To summarize the GCD, the
+key milestones are the following:
+
+  1. By June 7th, [Git
+     repositories](https://savannah.gnu.org/git/?group=guix) will be
+     migrated to Codeberg.
+
+  2. Between May 21st and June 4th (exact date yet to be decided), the
+     Guix repository itself will be migrated on a flag day.
+
+  3. Until at least May 7th, 2026,
+     `https://git.savannah.gnu.org/git/guix.git` will be a mirror of
+     `https://codeberg.org/guix/guix.git`.
+
+  4. Until December 31st, 2025, bug reports and patches will still be
+     accepted by email, in addition to Codeberg (issues and pull
+     requests).
+
+Of course, this is just the beginning.  Our hope is that the move can
+help improve much needed tooling such as the [QA
+infrastructure](https://qa.guix.gnu.org) following work on
+[Forgejo/Cuirass
+integration](https://hpc.guix.info/blog/2025/01/join-the-guix-science-community/)
+started earlier this year, and possibly develop new tools and services
+to assist in the maintenance of this huge package collection that Guix
+provides.
+
+# What this will change for you
+
+As a user, the main change is that your [`channels.scm` configuration
+files](https://guix.gnu.org/manual/devel/en/html_node/Invoking-guix-pull.html),
+if their refer to the `git.savannah.gnu.org` URL, should be changed to
+refer to `https://codeberg.org/guix/guix.git` once migration is
+complete.  But don’t worry: `guix pull` will tell you if/when you need
+to update your config files and the old URL will remain a mirror for at
+least a year anyway.
+
+Also, channel files produced by `guix describe` to pin Guix to a
+specific revision and to re-deploy it later anytime with
+[`time-machine`](https://guix.gnu.org/manual/devel/en/html_node/Invoking-guix-time_002dmachine.html)
+will always work, even if the refer to the `git.savannah.gnu.org` URL,
+and even when that repository eventually vanishes, thanks to [automatic
+fallback to Software
+Heritage](https://guix.gnu.org/en/blog/2024/source-code-archiving-in-guix-new-publication/).
+
+As a contributor, nothing changes for bug reports and patches that you
+already submitted by email: just keep going!
+
+Once the Guix repository has migrated though, you’ll be able to report
+bugs at Codeberg and create *pull requests* for changes.  The latter is
+a relief for many—no need to fiddle with admittedly intricate email
+setups and procedures—but also a pain point for those who had come to
+master and appreciate the email workflow.
+
+For this reason, the “User Interfaces” section of the GCD describes the
+options available besides the Web interface—command-line and Emacs
+interfaces in particular.  Some are still work-in-progress, but it’s
+exciting to see, for example, that over the past few months many
+improvements landed in [`fj.el`](https://codeberg.org/martianh/fj.el/)
+and that a [Forgejo-capable branch of
+Magit-Forge](https://github.com/pinoaffe/forge/tree/forgejo-support) saw
+the light.  Check it out!
+
+A concern brought up during the discussion is that of having to create
+an account on Codeberg to be able to contribute—sometimes seen as a
+hindrance compared to the open-for-all and distributed nature of
+cooperation by email.  This remains an open issue, though hopefully one
+that will become less acute as [support for federation in
+Forgejo](https://codeberg.org/forgejo-contrib/federation/src/branch/main/FederationRoadmap.md)
+develops.  In the meantime, as the GCD states, occasional bug reports
+and patches sent by email to `guix-devel` will be accepted.
+
+# Moving forward
+
+This was an summary of what is to come; check out [the
+GCD](https://archive.softwareheritage.org/browse/content/sha1_git:4d78cab341653e17db5f09beaf425f9634b5e81e/?origin_url=https://git.savannah.gnu.org/git/guix/guix-consensus-documents.git&path=002-codeberg.md)
+for more info, and reach out to the [`guix-devel` mailing
+list](https://guix.gnu.org/contact/) if you have any questions!
+
+Real work begins now.  We hope the migration to Codeberg will be smooth
+and enjoyable for all.  For one thing, it already proved our ability to
+collectively decide on the project’s future, which is no small feat.
+There’s a lot to expect from the move in improving the project’s ability
+to work flawlessly at this scale—more than 100 code contributors and
+2,000 commits each month, and more than 33,000 packages available in
+Guix proper.  Let’s make the best of it, and until then, happy hacking!
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