diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 35bfdee8..102d7e21 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -53,7 +53,7 @@ Or you can use `nox`:
 nox -R -s pytest -- tests/test_*.py
 ```
 
-The same appliest to `pylint` or `mypy` for example:
+The same applies to `pylint` or `mypy` for example:
 
 ```sh
 nox -R -s pylint -- tests/test_*.py
@@ -127,12 +127,19 @@ These are the steps to create a new release:
 
 1. Get the latest head you want to create a release from.
 
+   If you use milestones, check that the milestone for this release has no open
+   issues left, and move whatever won't make it to a later milestone.
+
 2. Update the `RELEASE_NOTES.md` file if it is not complete, up to date, and
-   remove template comments (`<!-- ... ->`) and empty sections. Submit a pull
+   remove template comments (`<!-- ... -->`) and empty sections. Submit a pull
    request if an update is needed, wait until it is merged, and update the
    latest head you want to create a release from to get the new merged pull
    request.
 
+   This can't be left for later: the notes published with the release are read
+   from the `RELEASE_NOTES.md` committed at the tagged commit, not from the tag
+   message.
+
 3. Create a new signed tag using the release notes and
    a [semver](https://semver.org/) compatible version number with a `v` prefix,
    for example:
@@ -141,6 +148,10 @@ These are the steps to create a new release:
    git tag -s --cleanup=whitespace -F RELEASE_NOTES.md v0.0.1
    ```
 
+   The signature is not optional: the *Protect released tags* ruleset rejects
+   unsigned tags. It also forbids updating or deleting a released tag, so make
+   sure you are tagging the commit you want.
+
 4. Push the new tag.
 
 5. A GitHub action will test the tag and if all goes well it will create
@@ -159,4 +170,7 @@ These are the steps to create a new release:
    Commit the new release notes and create a PR (this step should be automated
    eventually too).
 
-7. Celebrate!
+7. If you use milestones, close the milestone for this release, and create the
+   next one if it doesn't exist yet.
+
+8. Celebrate!
diff --git a/pyproject.toml b/pyproject.toml
index b10e401b..0cdccdac 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,7 @@
 requires = [
   "setuptools == 84.0.0",
   "setuptools_scm[toml] == 10.2.1",
-  "frequenz-repo-config[lib] == 0.18.0",
+  "frequenz-repo-config[lib] == 0.19.0",
 ]
 build-backend = "setuptools.build_meta"
 
@@ -57,7 +57,7 @@ dev-mkdocs = [
   "mkdocs-material == 9.7.7",
   "mkdocstrings[python] == 1.0.6",
   "mkdocstrings-python == 2.0.7",
-  "frequenz-repo-config[lib] == 0.18.0",
+  "frequenz-repo-config[lib] == 0.19.0",
 ]
 dev-mypy = [
   "mypy == 2.3.1",
@@ -66,7 +66,7 @@ dev-mypy = [
   # For checking the noxfile, docs/ script, and tests
   "frequenz-client-common[dev-mkdocs,dev-noxfile,dev-pytest]",
 ]
-dev-noxfile = ["nox == 2026.8.17", "frequenz-repo-config[lib] == 0.18.0"]
+dev-noxfile = ["nox == 2026.8.17", "frequenz-repo-config[lib] == 0.19.0"]
 dev-pylint = [
   "pylint == 4.0.8",
   # For checking the noxfile, docs/ script, and tests
@@ -74,7 +74,7 @@ dev-pylint = [
 ]
 dev-pytest = [
   "pytest == 9.1.1",
-  "frequenz-repo-config[extra-lint-examples] == 0.18.0",
+  "frequenz-repo-config[extra-lint-examples] == 0.19.0",
   "hypothesis == 6.165.10",
   "pytest-mock == 3.15.1",
   "pytest-asyncio == 1.4.0",
@@ -164,11 +164,13 @@ filterwarnings = [
   'ignore:Protobuf gencode version .*exactly one major version older.*:UserWarning',
 ]
 testpaths = ["tests", "src"]
+asyncio_debug = true
 asyncio_mode = "auto"
 asyncio_default_fixture_loop_scope = "function"
 required_plugins = ["pytest-asyncio", "pytest-mock"]
 
 [tool.mypy]
+enable_error_code = ["exhaustive-match"]
 explicit_package_bases = true
 namespace_packages = true
 # This option disables mypy cache, and it is sometimes useful to enable it if