diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f22b477..b8b21c2 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -2,8 +2,10 @@ name: Build and test
 
 on:
   push:
+    branches: ["**"]  # not tags: a release tag runs this workflow through release.yml
   pull_request:
   workflow_dispatch:
+  workflow_call:
 
 jobs:
   build-test:
@@ -41,12 +43,3 @@ jobs:
         with:
           name: mess-static-linux-64
           path: .pixi/envs/static/bin/mess*
-
-      - name: Upload mess-static to the Auto-Mech channel
-        if: matrix.environment == 'static' && github.event_name == 'push' && github.ref_name == 'master' && github.repository_owner == 'Auto-Mech'
-        run: |
-          pixi publish --path static --target-dir dist
-          # As before: an upload of an existing version fails, which is not an error here
-          pixi exec rattler-build upload anaconda -o Auto-Mech dist/*.conda || true
-        env:
-          ANACONDA_API_KEY: ${{ secrets.ANACONDA_API_KEY }}
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
new file mode 100644
index 0000000..62b930f
--- /dev/null
+++ b/.github/workflows/release.yml
@@ -0,0 +1,98 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - "v*.*.*"
+
+permissions:
+  contents: read
+
+jobs:
+  # Releases are made from master only: stop if the tag is on another branch
+  check:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0  # all branches, to compare the tag with master
+
+      - name: Check that the tagged commit is on master
+        run: git merge-base --is-ancestor "$GITHUB_SHA" origin/master
+
+  test:
+    needs: check
+    uses: ./.github/workflows/build.yml
+
+  publish:
+    needs: test
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      id-token: write  # for prefix.dev Trusted Publishing
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: prefix-dev/setup-pixi@v0.11.3
+        with:
+          pixi-version: v0.84.1
+          environments: release
+          cache: true
+
+      - name: Build the conda packages
+        run: pixi run build-conda
+
+      - name: Upload the conda packages
+        uses: actions/upload-artifact@v4
+        with:
+          name: conda-packages
+          path: dist/*.conda
+
+      # Only the main repository is a trusted publisher of the channel
+      - name: Publish the conda packages to prefix.dev
+        if: github.repository_owner == 'Auto-Mech'
+        run: pixi run publish-conda
+
+  release:
+    needs: publish
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write  # to create the GitHub release
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Download the conda packages
+        uses: actions/download-artifact@v4
+        with:
+          name: conda-packages
+          path: dist/
+
+      # The static executables that the test job built and tested
+      - name: Download the static executables
+        uses: actions/download-artifact@v4
+        with:
+          name: mess-static-linux-64
+          path: mess-static/
+
+      - name: Archive the static executables
+        run: |
+          name="mess-static-${GITHUB_REF_NAME#v}-linux-64"
+          mv mess-static "$name"
+          chmod +x "$name"/*  # artifacts do not keep file permissions
+          tar -czf "dist/$name.tar.gz" "$name"
+
+      - name: Extract release notes
+        id: extract-release-notes
+        uses: ffurrer2/extract-release-notes@v2
+
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v2
+        with:
+          tag_name: ${{ github.ref_name }}
+          body: ${{ steps.extract-release-notes.outputs.release_notes }}
+          files: |
+            dist/*.conda
+            dist/*.tar.gz
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..6a12b3c
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,36 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
+Versions are `YYYY.M.N`, where `N` counts the releases within the month.
+
+## [Unreleased]
+
+### Added
+
+- The `mess` conda package: the executables linked against conda-forge's ILP64 OpenBLAS and GSL.
+- Releases: a version tag builds and tests both packages, publishes them, and makes a GitHub release with the packages and a tarball of the static executables.
+
+### Changed
+
+- `mess-static` is built from source with CMake, instead of repackaging prebuilt executables. The executables are `mess`, `messpf` and `messabs`, and their output for the examples is unchanged.
+- `mess` and `mess-static` share one version.
+- The packages are published to the [`automech`](https://prefix.dev/channels/automech) channel on prefix.dev. The `auto-mech` channel on anaconda.org keeps the earlier `mess-static` packages and gets no new ones.
+- `examples/mess.inp` sets `WithCRM`, which its radiative oscillators need.
+
+### Removed
+
+- The `gumbo` executable from `mess-static`: its example input (`examples/messsym.inp`) does not run, so it cannot be tested.
+
+## [2026.2.4] - 2026-02-04
+
+- `mess-static` on anaconda.org, with executables built from the source of that date.
+
+## [2025.9.0] - 2025-09-25
+
+- `mess-static` on anaconda.org, packaged with Pixi.
+
+## [2024.5.16] - 2024-05-16
+
+- `mess-static` on anaconda.org, the first conda package of the static executables.
diff --git a/README.md b/README.md
index 6297062..b21880d 100644
--- a/README.md
+++ b/README.md
@@ -9,11 +9,37 @@ rate coefficients for complex-forming reactions via solution of the one-dimensio
 
 ## Installation
 
-The Auto-Mech channel provides fully static executables that run on any x86-64 Linux, with no runtime dependencies:
+The [`automech`](https://prefix.dev/channels/automech) channel on prefix.dev provides two conda packages with the same executables (`mess`, `messpf`, `messabs`).
+Install only one of them.
+
+**`mess-static`** has fully static executables that run on any x86-64 Linux, with no runtime dependencies:
+```
+# conda (or mamba)
+conda install -c https://repo.prefix.dev/automech mess-static
+
+# Pixi, for all your projects
+pixi global install -c https://repo.prefix.dev/automech mess-static
+
+# Pixi, in a workspace
+pixi workspace channel add https://repo.prefix.dev/automech && pixi add mess-static
+```
+
+**`mess`** is linked against the conda-forge libraries (OpenBLAS, GSL), so it also needs the `conda-forge` channel:
 ```
-conda install -c auto-mech mess-static
+# conda (or mamba)
+conda install -c https://repo.prefix.dev/automech -c conda-forge mess
+
+# Pixi, for all your projects
+pixi global install -c https://repo.prefix.dev/automech -c conda-forge mess
+
+# Pixi, in a workspace (which has the conda-forge channel by default)
+pixi workspace channel add https://repo.prefix.dev/automech && pixi add mess
 ```
-They are also attached to each run of the GitHub Actions workflow (artifact `mess-static-linux-64`).
+
+The static executables are also attached to each [GitHub release](https://github.com/Auto-Mech/MESS/releases) as a tarball, for systems without conda.
+The changes in each release are listed in [`CHANGELOG.md`](CHANGELOG.md).
+
+The `auto-mech` channel on anaconda.org keeps the `mess-static` packages up to version 2026.2.4 and gets no new ones.
 
 ## Building from source
 
diff --git a/RELEASING.md b/RELEASING.md
new file mode 100644
index 0000000..d0a918c
--- /dev/null
+++ b/RELEASING.md
@@ -0,0 +1,24 @@
+# Releasing MESS
+
+These notes are for the maintainers who make releases.
+
+`mess` and `mess-static` share one version, `YYYY.M.N`, where `N` counts the releases within the month, starting from 0.
+To release, from an up-to-date `master` of this repository:
+1. List the changes to the source since the last release:
+   ```
+   git log --no-merges $(git describe --tags --abbrev=0)..HEAD -- src examples
+   ```
+2. Describe them under `[Unreleased]` in `CHANGELOG.md`, and commit.
+3. Run `pixi run release YYYY.M.N` (for example, `pixi run release 2026.11.0`).
+   This updates the version (in `pixi.toml` and `static/recipe.yaml`) and the changelog, then commits, tags and pushes.
+
+The tag starts the release workflow (`.github/workflows/release.yml`), which:
+- stops unless the tagged commit is on `master`;
+- builds and tests both packages;
+- publishes them to the [`automech`](https://prefix.dev/channels/automech) channel on prefix.dev;
+- makes a GitHub release with the packages, a tarball of the static executables, and the changelog entry as its notes.
+
+Publishing uses Trusted Publishing: the channel lists this repository and `release.yml` as a trusted publisher, so there are no API keys or secrets.
+If the publish job fails, fix the cause and re-run the job: files that were already uploaded are skipped.
+
+`pixi run version` shows the current version.
diff --git a/pixi.lock b/pixi.lock
index 95fbe93..063962a 100644
--- a/pixi.lock
+++ b/pixi.lock
@@ -24,6 +24,44 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/linux-64/libopenblas-ilp64-0.3.34-pthreads_h79482e6_2.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-64/libstdcxx-16.2.0-h934c35e_7.conda
       - conda_source: mess[b5469410] @ .
+  release:
+    channels:
+    - url: https://conda.anaconda.org/conda-forge/
+    indexes:
+    - https://pypi.org/simple
+    packages:
+      linux-64:
+      - conda: https://conda.anaconda.org/conda-forge/linux-64/_openmp_mutex-4.5-20_gnu.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-64/bzip2-1.0.8-hda65f42_10.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-64/ld_impl_linux-64-2.46.1-default_hbd61a6d_103.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-64/libedit-3.1.20260512-pl5321h373387f_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-64/libexpat-2.9.0-hd2095e1_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-64/libffi-3.7.0-h81df57d_1.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-64/libgcc-16.2.0-ha9f2e26_7.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-64/libgomp-16.2.0-he0feb66_7.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-64/liblzma-5.8.3-hb03c661_1.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-64/libmpdec-4.0.0-hb03c661_2.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-64/libsqlite-3.54.1-h0737f62_101.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-64/libuuid-2.42.4-hcfc3c73_1.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-64/libzlib-1.3.2-h25fd6f3_3.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-64/ncurses-6.6-hdb14827_1.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-64/openssl-3.6.5-h781a0a9_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-64/python-3.15.2-h6e52b48_100_cp315.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-64/tk-8.6.13-noxft_h1df4ec4_4.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-64/zstd-1.5.7-hb78ec9c_7.conda
+      - conda: https://conda.anaconda.org/conda-forge/noarch/ca-certificates-2026.10.23-hbd8a1cb_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/noarch/cli-ui-0.17.2-pyhd8ed1ab_0.tar.bz2
+      - conda: https://conda.anaconda.org/conda-forge/noarch/colorama-0.4.6-pyhd8ed1ab_1.conda
+      - conda: https://conda.anaconda.org/conda-forge/noarch/contextlib2-21.6.0-pyhd8ed1ab_1.conda
+      - conda: https://conda.anaconda.org/conda-forge/noarch/docopt-0.6.2-pyhd8ed1ab_2.conda
+      - conda: https://conda.anaconda.org/conda-forge/noarch/python_abi-3.15-9_cp315.conda
+      - conda: https://conda.anaconda.org/conda-forge/noarch/schema-0.7.8-pyhd8ed1ab_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/noarch/tabulate-0.10.0-pyhcf101f3_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/noarch/tbump-6.9.0-pyhd8ed1ab_0.tar.bz2
+      - conda: https://conda.anaconda.org/conda-forge/noarch/tomlkit-0.15.2-pyh5ded981_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/noarch/tzdata-2026e-h5d301ff_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/noarch/unidecode-1.4.0-pyhcf101f3_1.conda
+      - pypi: https://files.pythonhosted.org/packages/23/06/b4f06ca7afb5d9e942c642980c308ffcfa1fa0e8b0a3ddbec78483ef1614/keepachangelog-2.0.0-py3-none-any.whl
   static:
     channels:
     - url: https://conda.anaconda.org/conda-forge/
@@ -42,6 +80,7 @@ packages:
   - openmp_impl <0.0a0
   license: BSD-3-Clause
   license_family: BSD
+  purls: []
   run_exports:
     strong:
     - _openmp_mutex >=4.5
@@ -77,6 +116,7 @@ packages:
   - libgcc >=14
   license: bzip2-1.0.6
   license_family: BSD
+  purls: []
   run_exports:
     weak:
     - bzip2 >=1.0.8,<2.0a0
@@ -276,6 +316,7 @@ packages:
   - binutils_impl_linux-64 2.46.1
   license: GPL-3.0-only
   license_family: GPL
+  purls: []
   run_exports: {}
   size: 742109
   timestamp: 1791565468810
@@ -346,6 +387,7 @@ packages:
   - ncurses >=6.6,<7.0a0
   license: BSD-2-Clause
   license_family: BSD
+  purls: []
   run_exports:
     weak:
     - libedit >=3.1.20260512,<3.2.0a0
@@ -374,9 +416,24 @@ packages:
   - expat 2.9.0.*
   license: MIT
   license_family: MIT
+  purls: []
   run_exports: {}
   size: 78894
   timestamp: 1793054221966
+- conda: https://conda.anaconda.org/conda-forge/linux-64/libffi-3.7.0-h81df57d_1.conda
+  sha256: c8c7583ef063bc3c430f1d48298e5ad24f796a35c22ed5b14183325825a61106
+  md5: 6525a0b06aa4fd390795f0740636a9dd
+  depends:
+  - __glibc >=2.17,<3.0.a0
+  - libgcc >=15
+  license: MIT
+  license_family: MIT
+  purls: []
+  run_exports:
+    weak:
+    - libffi >=3.7.0,<3.8.0a0
+  size: 68004
+  timestamp: 1787753412298
 - conda: https://conda.anaconda.org/conda-forge/linux-64/libgcc-16.2.0-ha9f2e26_7.conda
   sha256: e031634c3a928f9594eba868bc46ef5230d6571a364a0c63215b06c4563bfcea
   md5: 735629b400b70eeab21a2ba8f5b1c2ce
@@ -388,6 +445,7 @@ packages:
   - libgomp 16.2.0 he0feb66_7
   license: GPL-3.0-only WITH GCC-exception-3.1
   license_family: GPL
+  purls: []
   run_exports: {}
   size: 1058444
   timestamp: 1790303109576
@@ -423,6 +481,7 @@ packages:
   - __glibc >=2.17,<3.0.a0
   license: GPL-3.0-only WITH GCC-exception-3.1
   license_family: GPL
+  purls: []
   run_exports:
     strong:
     - _openmp_mutex >=4.5
@@ -437,11 +496,24 @@ packages:
   constrains:
   - xz 5.8.3.*
   license: 0BSD
+  purls: []
   run_exports:
     weak:
     - liblzma >=5.8.3,<6.0a0
   size: 112995
   timestamp: 1786348617826
+- conda: https://conda.anaconda.org/conda-forge/linux-64/libmpdec-4.0.0-hb03c661_2.conda
+  sha256: 46820b4a835e175940ae20bec00fdddaff804cda27a1408ab1b95e77a2196437
+  md5: fcfed1dc5053eb1901b66e7b1fc32588
+  depends:
+  - __glibc >=2.17,<3.0.a0
+  - libgcc >=14
+  license: BSD-2-Clause
+  license_family: BSD
+  purls: []
+  run_exports: {}
+  size: 92759
+  timestamp: 1786650399772
 - conda: https://conda.anaconda.org/conda-forge/linux-64/libnghttp2-1.71.0-hc5e5977_0.conda
   sha256: a4386712ad6d5bc18943b198407c39e2f8ae2fa9c6418bb37bba96f1d382f109
   md5: 726df214814a8b06135a6a674bc54589
@@ -524,6 +596,22 @@ packages:
     - libsanitizer 16.2.0
   size: 8115383
   timestamp: 1790303148068
+- conda: https://conda.anaconda.org/conda-forge/linux-64/libsqlite-3.54.1-h0737f62_101.conda
+  sha256: c294029f893d05286f1061bbab85b820f1eea73dd859af4bcc619197bcc34810
+  md5: 36e097bf5f1e0699e88c8ac801f2dc65
+  depends:
+  - __glibc >=2.17,<3.0.a0
+  - libgcc >=15
+  - libzlib >=1.3.2,<2.0a0
+  constrains:
+  - icu <0.0a0
+  license: blessing
+  purls: []
+  run_exports:
+    weak:
+    - libsqlite >=3.54.1,<4.0a0
+  size: 980491
+  timestamp: 1793051548007
 - conda: https://conda.anaconda.org/conda-forge/linux-64/libssh2-1.11.1-h6154650_1.conda
   sha256: 7e463000fa1cba3f3a6597b776f6ab301d425a96e3bc20d0d9d76a3b9f237aa3
   md5: 5c526561e1d2a2e071941174eae84557
@@ -552,6 +640,20 @@ packages:
   run_exports: {}
   size: 6615436
   timestamp: 1790303132935
+- conda: https://conda.anaconda.org/conda-forge/linux-64/libuuid-2.42.4-hcfc3c73_1.conda
+  sha256: 0e2e8f2daa9306e67f046e31092d637431d8cf0a26c407ab22401d108c2d4631
+  md5: d852293faea3c04a6e896b908b43aded
+  depends:
+  - __glibc >=2.17,<3.0.a0
+  - libgcc >=15
+  license: BSD-3-Clause
+  license_family: BSD
+  purls: []
+  run_exports:
+    weak:
+    - libuuid >=2.42.4,<3.0a0
+  size: 36134
+  timestamp: 1793891599274
 - conda: https://conda.anaconda.org/conda-forge/linux-64/libuv-1.52.1-h280c20c_1.conda
   sha256: 67761d0206f84140047a367eaf9befe03a7e157a29ee25aee0047b40801cc6b6
   md5: 01c4ed87826af55996768af6dbc936b4
@@ -574,6 +676,7 @@ packages:
   - zlib 1.3.2 *_3
   license: Zlib
   license_family: Other
+  purls: []
   run_exports:
     weak:
     - libzlib >=1.3.2,<2.0a0
@@ -586,6 +689,7 @@ packages:
   - __glibc >=2.17,<3.0.a0
   - libgcc >=14
   license: X11 AND BSD-3-Clause
+  purls: []
   run_exports:
     weak:
     - ncurses >=6.6,<7.0a0
@@ -622,11 +726,45 @@ packages:
   - libgcc >=15
   license: Apache-2.0
   license_family: Apache
+  purls: []
   run_exports:
     weak:
     - openssl >=3.6.5,<4.0a0
   size: 3195299
   timestamp: 1791098052301
+- conda: https://conda.anaconda.org/conda-forge/linux-64/python-3.15.2-h6e52b48_100_cp315.conda
+  build_number: 100
+  sha256: dd6fdef748df5636029673a834ca3632ce44c86d71e4986d70bcdb2ae5607a25
+  md5: 38c3edc23439db3ca383be02ae2b702e
+  depends:
+  - __glibc >=2.17,<3.0.a0
+  - bzip2 >=1.0.8,<2.0a0
+  - ld_impl_linux-64 >=2.36.1
+  - libedit >=3.1.20260512,<3.2.0a0
+  - libexpat >=2.8.5,<3.0a0
+  - libffi >=3.7.0,<3.8.0a0
+  - libgcc >=15
+  - liblzma >=5.8.3,<6.0a0
+  - libmpdec >=4.0.0,<5.0a0
+  - libsqlite >=3.54.1,<4.0a0
+  - libuuid >=2.42.4,<3.0a0
+  - libzlib >=1.3.2,<2.0a0
+  - ncurses >=6.6,<7.0a0
+  - openssl >=3.5.9,<4.0a0
+  - python_abi 3.15.* *_cp315
+  - tk >=8.6.13,<8.7.0a0
+  - tzdata
+  - zstd >=1.5.7,<1.6.0a0
+  license: Python-2.0
+  purls: []
+  run_exports:
+    weak:
+    - python_abi 3.15.* *_cp315
+    noarch:
+    - python
+  size: 29327137
+  timestamp: 1793015518763
+  python_site_packages_path: lib/python3.15/site-packages
 - conda: https://conda.anaconda.org/conda-forge/linux-64/rhash-1.4.6-hb03c661_2.conda
   sha256: 186a5b225077ad5f4656966da947d43307101950751ef4a239b455588756b4e1
   md5: 007602d697e07c11ff9864964eba5ee3
@@ -640,6 +778,23 @@ packages:
     - rhash >=1.4.6,<2.0a0
   size: 194994
   timestamp: 1786731436520
+- conda: https://conda.anaconda.org/conda-forge/linux-64/tk-8.6.13-noxft_h1df4ec4_4.conda
+  build_number: 104
+  sha256: a1a241d172c1ccab067ba245206dd048bc3c2d1b84504b53c9468e99adfc16a1
+  md5: 676a2f9b1c4fcf57b70aa5c65f6c60d0
+  depends:
+  - libgcc >=15
+  - __glibc >=2.17,<3.0.a0
+  - libzlib >=1.3.2,<2.0a0
+  constrains:
+  - xorg-libx11 >=1.8.13,<2.0a0
+  license: TCL
+  purls: []
+  run_exports:
+    weak:
+    - tk >=8.6.13,<8.7.0a0
+  size: 3566806
+  timestamp: 1787272857910
 - conda: https://conda.anaconda.org/conda-forge/linux-64/zstd-1.5.7-hb78ec9c_7.conda
   sha256: 47d682b9f6d6ec9eb1a6e6c3e75ea6273e899e78fb7fc59f81d39745009fbc60
   md5: aa459086047c0e5e27023ab19f8cb86a
@@ -648,6 +803,7 @@ packages:
   - libzlib >=1.3.2,<2.0a0
   license: BSD-3-Clause
   license_family: BSD
+  purls: []
   run_exports:
     weak:
     - zstd >=1.5.7,<1.6.0a0
@@ -659,9 +815,61 @@ packages:
   depends:
   - __unix
   license: ISC
+  purls: []
   run_exports: {}
   size: 130057
   timestamp: 1792772446739
+- conda: https://conda.anaconda.org/conda-forge/noarch/cli-ui-0.17.2-pyhd8ed1ab_0.tar.bz2
+  sha256: 86a2428e5738c65a4cbb5468810024eb589753255e7f1ebf10a65804ce9372a2
+  md5: e210df0dfab7781247c2a7ba09673400
+  depends:
+  - colorama >=0.4.1
+  - python >=3.7,<4.0
+  - tabulate >=0.8.3
+  - unidecode >=1.0.23
+  license: BSD-3-Clause
+  license_family: BSD
+  purls:
+  - pkg:pypi/cli-ui?source=hash-mapping
+  run_exports: {}
+  size: 17216
+  timestamp: 1661938037728
+- conda: https://conda.anaconda.org/conda-forge/noarch/colorama-0.4.6-pyhd8ed1ab_1.conda
+  sha256: ab29d57dc70786c1269633ba3dff20288b81664d3ff8d21af995742e2bb03287
+  md5: 962b9857ee8e7018c22f2776ffa0b2d7
+  depends:
+  - python >=3.9
+  license: BSD-3-Clause
+  license_family: BSD
+  purls:
+  - pkg:pypi/colorama?source=hash-mapping
+  run_exports: {}
+  size: 27011
+  timestamp: 1733218222191
+- conda: https://conda.anaconda.org/conda-forge/noarch/contextlib2-21.6.0-pyhd8ed1ab_1.conda
+  sha256: 90e12ef22f91937e723116b79cb42f3ab38c407970398a843b1eac358ca68c45
+  md5: 4de17d73a4afd4ce03b370fe4480100f
+  depends:
+  - python >=3.9
+  license: PSF-2.0
+  license_family: PSF
+  purls:
+  - pkg:pypi/contextlib2?source=hash-mapping
+  run_exports: {}
+  size: 18056
+  timestamp: 1734475348772
+- conda: https://conda.anaconda.org/conda-forge/noarch/docopt-0.6.2-pyhd8ed1ab_2.conda
+  sha256: 7581a21e9bbe279d73d8ea32333f07ab286d2880edcee76a52480e2e4e53470d
+  md5: a83e0c5be564702a79a9e3efda32009f
+  depends:
+  - python >=3.9
+  license: MIT
+  license_family: MIT
+  purls:
+  - pkg:pypi/docopt?source=hash-mapping
+  run_exports: {}
+  size: 18876
+  timestamp: 1733817956506
 - conda: https://conda.anaconda.org/conda-forge/noarch/kernel-headers_linux-64-4.18.0-he073ed8_9.conda
   sha256: 41557eeadf641de6aeae49486cef30d02a6912d8da98585d687894afd65b356a
   md5: 86d9cba083cd041bfbf242a01a7a1999
@@ -692,6 +900,31 @@ packages:
   run_exports: {}
   size: 23329491
   timestamp: 1790303058123
+- conda: https://conda.anaconda.org/conda-forge/noarch/python_abi-3.15-9_cp315.conda
+  build_number: 9
+  sha256: 976c4a6db967a62385aa633daaab19a929f986b979a7ad836b8b70e15ca7aefd
+  md5: b23461631fe2abdbade0cb64babe7344
+  constrains:
+  - python 3.15.* *_cp315
+  license: BSD-3-Clause
+  license_family: BSD
+  purls: []
+  run_exports: {}
+  size: 6800
+  timestamp: 1788302827589
+- conda: https://conda.anaconda.org/conda-forge/noarch/schema-0.7.8-pyhd8ed1ab_0.conda
+  sha256: 77b8343f0a6779de199070b533c9b24aa74b0b5987e0f22800351e282296aa51
+  md5: 3c1c8d749d36f503fcc52f6aabb4c9be
+  depends:
+  - contextlib2 >=0.5.5
+  - python >=3.10
+  license: MIT
+  license_family: MIT
+  purls:
+  - pkg:pypi/schema?source=hash-mapping
+  run_exports: {}
+  size: 25371
+  timestamp: 1784572938499
 - conda: https://conda.anaconda.org/conda-forge/noarch/sysroot_linux-64-2.28-h4ee821c_9.conda
   sha256: c47299fe37aebb0fcf674b3be588e67e4afb86225be4b0d452c7eb75c086b851
   md5: 13dc3adbc692664cd3beabd216434749
@@ -706,13 +939,69 @@ packages:
     - __glibc >=2.28,<3.0.a0
   size: 24008591
   timestamp: 1765578833462
+- conda: https://conda.anaconda.org/conda-forge/noarch/tabulate-0.10.0-pyhcf101f3_0.conda
+  sha256: 3f661e98a09f976775a494488beb3d35ebb00f535b169c6bd891f2e280d55783
+  md5: 3b887b7b3468b0f494b4fad40178b043
+  depends:
+  - python >=3.10
+  - python
+  license: MIT
+  license_family: MIT
+  purls:
+  - pkg:pypi/tabulate?source=hash-mapping
+  run_exports: {}
+  size: 43964
+  timestamp: 1772732795746
+- conda: https://conda.anaconda.org/conda-forge/noarch/tbump-6.9.0-pyhd8ed1ab_0.tar.bz2
+  sha256: 831d28b05f5a28a8c1e50c2a1ff574d3d49b4d8b34c30a6fd0528514e6028985
+  md5: 7dc2c1dae131bf141ceac251848bd6b4
+  depends:
+  - cli-ui >=0.10.3
+  - docopt >=0.6.2
+  - python >=3.6,<4.0
+  - schema >=0.7.1
+  - tomlkit >=0.5.8
+  license: BSD-3-Clause
+  license_family: BSD
+  purls:
+  - pkg:pypi/tbump?source=hash-mapping
+  run_exports: {}
+  size: 28785
+  timestamp: 1652622787739
+- conda: https://conda.anaconda.org/conda-forge/noarch/tomlkit-0.15.2-pyh5ded981_0.conda
+  sha256: e6aa9e1c4d4e229280ef5446ebbc99e7b65c874deb47f83be6a751ba20332cc8
+  md5: eadfe340211fea481536d602af9ace99
+  depends:
+  - python >=3.11
+  - python
+  license: MIT
+  license_family: MIT
+  purls:
+  - pkg:pypi/tomlkit?source=compressed-mapping
+  run_exports: {}
+  size: 51412
+  timestamp: 1792143573427
 - conda: https://conda.anaconda.org/conda-forge/noarch/tzdata-2026e-h5d301ff_0.conda
   sha256: 2b7ca858879f183ce2dcc65b300f48a0133d5430550f35b23d80d405a0788dbf
   md5: abccc3810d2b97e570dee487f2b46e38
   license: LicenseRef-Public-Domain
+  purls: []
   run_exports: {}
   size: 119208
   timestamp: 1792758382821
+- conda: https://conda.anaconda.org/conda-forge/noarch/unidecode-1.4.0-pyhcf101f3_1.conda
+  sha256: 184d1377f88251983ef5154aea0d6cb73108afc8510ed66526afb1c44b2e1259
+  md5: 53cb4b14ab0841e104e2bd11ee64b840
+  depends:
+  - python >=3.10
+  - python
+  license: GPL-2.0-or-later
+  license_family: GPL
+  purls:
+  - pkg:pypi/unidecode?source=hash-mapping
+  run_exports: {}
+  size: 189632
+  timestamp: 1762257681278
 - conda_source: mess-static[5770cfd9] @ static
   variants:
     c_stdlib: sysroot
@@ -847,3 +1136,13 @@ packages:
   - conda: https://conda.anaconda.org/conda-forge/linux-64/libopenblas-ilp64-0.3.34-pthreads_h79482e6_2.conda
   - conda: https://conda.anaconda.org/conda-forge/linux-64/libstdcxx-16.2.0-h934c35e_7.conda
   - conda: https://conda.anaconda.org/conda-forge/linux-64/openblas-ilp64-0.3.34-pthreads_h8097de1_2.conda
+- pypi: https://files.pythonhosted.org/packages/23/06/b4f06ca7afb5d9e942c642980c308ffcfa1fa0e8b0a3ddbec78483ef1614/keepachangelog-2.0.0-py3-none-any.whl
+  name: keepachangelog
+  version: 2.0.0
+  sha256: 0b2259fd73b55f2b99e61035ff83f3d86d0f2764841a7e2de86e31e675e42fee
+  requires_dist:
+  - httpx==0.27.* ; extra == 'testing'
+  - starlette==0.37.* ; extra == 'testing'
+  - flask-restx==1.* ; extra == 'testing'
+  - pytest-cov==5.* ; extra == 'testing'
+  requires_python: '>=3.9'
diff --git a/pixi.toml b/pixi.toml
index e7306de..35ffe32 100644
--- a/pixi.toml
+++ b/pixi.toml
@@ -6,7 +6,7 @@ preview = ["pixi-build"]
 
 [package]
 name = "mess"
-version = "2.10.32"
+version = "2026.2.4"
 
 [package.build.backend]
 name = "pixi-build-cmake"
@@ -39,6 +39,27 @@ mess = { path = "." }
 [feature.static.dependencies]
 mess-static = { path = "static" }
 
+# Release tooling (see tbump.toml and RELEASING.md)
+[feature.release.dependencies]
+python = "*"
+tbump = "*"
+
+[feature.release.pypi-dependencies]
+keepachangelog = "*"
+
+[feature.release.tasks]
+# Build both conda packages into dist/
+build-conda = "pixi publish --target-dir dist && pixi publish --path static --target-dir dist"
+# Publish them to prefix.dev, skipping files that were already uploaded, so that a
+# failed release can be rerun
+publish-conda = "pixi upload prefix --skip-existing --channel automech dist/*.conda"
+# Initiate release
+version = "tbump current-version"
+changelog = { cmd = "keepachangelog release {{ version }}", args = ["version"] }
+release = "tbump"
+
 [environments]
 default = ["dynamic"]
 static = ["static"]
+# Only the release tooling: this environment does not build MESS
+release = { features = ["release"], no-default-feature = true }
diff --git a/static/README.md b/static/README.md
index 4a89cc0..2c1067c 100644
--- a/static/README.md
+++ b/static/README.md
@@ -12,4 +12,5 @@ pixi publish --path static --target-dir dist           # build dist/mess-static-
 ```
 
 The executables are then in `.pixi/envs/static/bin/`.
-The GitHub Actions workflow uploads them as a build artifact, and uploads the conda package to the Auto-Mech channel on pushes to `master` of `Auto-Mech/MESS`.
+The GitHub Actions workflow uploads them as a build artifact.
+Each release publishes the conda package to the `automech` channel on prefix.dev and attaches the executables to the GitHub release (see `RELEASING.md`).
diff --git a/static/pixi.toml b/static/pixi.toml
index 975748e..d383e12 100644
--- a/static/pixi.toml
+++ b/static/pixi.toml
@@ -2,10 +2,7 @@
 # This is a package of the root workspace (see ../pixi.toml).
 # It uses the rattler-build backend so that recipe.yaml can drop the run-exports
 # of its build and host dependencies: the package has no runtime dependencies.
-
-[package]
-name = "mess-static"
-version = "2026.11.0"
+# The name and version of the package are set in recipe.yaml.
 
 [package.build.backend]
 name = "pixi-build-rattler-build"
diff --git a/static/recipe.yaml b/static/recipe.yaml
index 11c5b77..19dfa22 100644
--- a/static/recipe.yaml
+++ b/static/recipe.yaml
@@ -1,6 +1,6 @@
 package:
   name: mess-static
-  version: "2026.11.0"
+  version: "2026.2.4"
 
 source:
   path: ..
diff --git a/tbump.toml b/tbump.toml
new file mode 100644
index 0000000..bd75106
--- /dev/null
+++ b/tbump.toml
@@ -0,0 +1,41 @@
+github_url = "https://github.com/Auto-Mech/MESS"
+
+# One version for both packages, mess and mess-static: YYYY.M.N, where N counts the
+# releases within the month, starting from 0
+[version]
+current = "2026.2.4"
+regex = '''
+  (?P<major>\d+)
+  \.
+  (?P<minor>\d+)
+  \.
+  (?P<patch>\d+)
+  '''
+
+[git]
+message_template = "Bump to {new_version}"
+tag_template = "v{new_version}"
+
+[[file]]
+src = "pixi.toml"
+search = 'version = "{current_version}"'
+
+[[file]]
+src = "static/recipe.yaml"
+search = 'version: "{current_version}"'
+
+[[before_commit]]
+name = "Update changelog"
+cmd = "pixi run changelog {new_version}"
+
+[[before_commit]]
+name = "Add changelog to commit"
+cmd = "git add CHANGELOG.md"
+
+[[before_commit]]
+name = "Update lockfile"
+cmd = "pixi lock"
+
+[[before_commit]]
+name = "Add lockfile to commit"
+cmd = "git add pixi.lock"