diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 852f382c..6a5de45c 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -53,12 +53,12 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Run tox
-        uses: lsst-sqre/run-tox@v1
+      - name: Run nox
+        uses: lsst-sqre/run-nox@v1
         with:
+          cache-dependency: "*/pyproject.toml"
+          nox-sessions: "typing test"
           python-version: ${{ matrix.python }}
-          tox-envs: "py,typing"
-          tox-plugins: "tox-uv"
 
   docs:
 
@@ -73,12 +73,12 @@ jobs:
       - name: Install Graphviz
         run: sudo apt-get install graphviz
 
-      - name: Run tox
-        uses: lsst-sqre/run-tox@v1
+      - name: Run nox
+        uses: lsst-sqre/run-nox@v1
         with:
-          python-version: "3.12"
-          tox-envs: "docs,docs-linkcheck"
-          tox-plugins: tox-uv
+          cache-dependency: "*/pyproject.toml"
+          nox-sessions: "docs docs-linkcheck"
+          python-version: ${{ env.PYTHON_VERSION }}
 
       # Only attempt documentation uploads for tagged releases and pull
       # requests from ticket branches in the same repository.  This avoids
@@ -113,6 +113,7 @@ jobs:
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           upload: false
+          working-directory: "safir"
 
   pypi:
 
@@ -135,3 +136,4 @@ jobs:
       - uses: lsst-sqre/build-and-publish-to-pypi@v2
         with:
           python-version: ${{ env.PYTHON_VERSION }}
+          working-directory: "safir"
diff --git a/.github/workflows/periodic-ci.yaml b/.github/workflows/periodic-ci.yaml
index b787b6ab..c9d2da65 100644
--- a/.github/workflows/periodic-ci.yaml
+++ b/.github/workflows/periodic-ci.yaml
@@ -30,12 +30,11 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Run tests in tox
-        uses: lsst-sqre/run-tox@v1
+      - name: Run tests in nox
+        uses: lsst-sqre/run-nox@v1
         with:
+          nox-sessions: "update-deps lint typing test"
           python-version: ${{ matrix.python }}
-          tox-envs: "lint,typing,py"
-          tox-plugins: "tox-uv"
           use-cache: false
 
       - name: Report status
@@ -58,12 +57,11 @@ jobs:
       - name: Install Graphviz
         run: sudo apt-get install graphviz
 
-      - name: Build docs in tox
-        uses: lsst-sqre/run-tox@v1
+      - name: Build docs in nox
+        uses: lsst-sqre/run-nox@v1
         with:
+          nox-sessions: "docs docs-linkcheck"
           python-version: ${{ env.PYTHON_VERSION }}
-          tox-envs: "docs,docs-linkcheck"
-          tox-plugins: tox-uv
           use-cache: false
 
       - name: Report status
@@ -91,6 +89,7 @@ jobs:
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           upload: false
+          working-directory: "safir"
 
       - name: Report status
         if: failure()
diff --git a/changelog.d/20240719_160937_rra_DM_45281_queue.md b/changelog.d/20240719_160937_rra_DM_45281_queue.md
new file mode 100644
index 00000000..89a23393
--- /dev/null
+++ b/changelog.d/20240719_160937_rra_DM_45281_queue.md
@@ -0,0 +1,3 @@
+### Other changes
+
+- Safir is now built with [nox](https://nox.thea.codes/en/stable/index.html) instead of [tox](https://tox.wiki/).
diff --git a/docs/_rst_epilog.rst b/docs/_rst_epilog.rst
index e80423de..58401214 100644
--- a/docs/_rst_epilog.rst
+++ b/docs/_rst_epilog.rst
@@ -9,6 +9,7 @@
 .. _HTTPX: https://www.python-httpx.org/
 .. _kubernetes_asyncio: https://github.com/tomplus/kubernetes_asyncio
 .. _mypy: https://www.mypy-lang.org
+.. _nox: https://nox.thea.codes/en/stable/
 .. _Phalanx: https://phalanx.lsst.io
 .. _pre-commit: https://pre-commit.com
 .. _Pydantic: https://docs.pydantic.dev/latest/
@@ -25,3 +26,4 @@
 .. _tox: https://tox.wiki/en/latest/
 .. _tox-docker: https://tox-docker.readthedocs.io/en/latest/
 .. _Uvicorn: https://www.uvicorn.org/
+.. _virtualenvwrapper: https://virtualenvwrapper.readthedocs.io/en/stable/
diff --git a/docs/dev/development.rst b/docs/dev/development.rst
index 5bb38798..59c2c5cb 100644
--- a/docs/dev/development.rst
+++ b/docs/dev/development.rst
@@ -21,19 +21,31 @@ Safir is developed by the LSST SQuaRE team.
 Setting up a local development environment
 ==========================================
 
-To develop Safir, create a virtual environment with your method of choice (like virtualenvwrapper) and then clone or fork, and install:
+Development of Safir should be done inside a virtual environment.
 
-.. code-block:: sh
+Nublado uses nox_ as its build system, which can manage a virtual environment for you.
+Run:
+
+.. prompt:: bash
+
+   nox -s venv-init
+
+The resulting virtual environment will be created in :file:`.venv`.
+Enable it by running :command:`source .venv/bin/activate`.
 
-   git clone https://github.com/lsst-sqre/safir.git
-   cd safir
-   make init
+Alternately, you can create a virtual environment with any other method of your choice (such as virtualenvwrapper_).
+If you use a different virtual environment, run the following command after you have enabled it:
 
-This init step does three things:
+.. prompt:: bash
 
-1. Installs Safir in an editable mode with its "dev" extra that includes test and documentation dependencies.
-2. Installs pre-commit and tox.
-3. Installs the pre-commit hooks.
+   nox -s init
+
+Either ``venv-init`` or ``init`` does the following:
+
+#. Installs build system dependencies in the virtual environment.
+#. Installs package dependencies, including test and documentation dependencies.
+#. Installs Safir packages in editable mode so that changes made to the Git checkout will be picked up by the virtual environment.
+#. Installs pre-commit hooks.
 
 You must have Docker installed and configured so that your user can start Docker containers in order to run the test suite.
 
@@ -45,14 +57,8 @@ Pre-commit hooks
 The pre-commit hooks, which are automatically installed by running the :command:`make init` command on :ref:`set up <dev-environment>`, ensure that files are valid and properly formatted.
 Some pre-commit hooks automatically reformat code:
 
-``seed-isort-config``
-    Adds configuration for isort to the :file:`pyproject.toml` file.
-
-``isort``
-    Automatically sorts imports in Python modules.
-
-``black``
-    Automatically formats Python code.
+``ruff``
+    Lint and reformat Python code and attempt to automatically fix some problems.
 
 ``blacken-docs``
     Automatically formats Python code in reStructuredText documentation and docstrings.
@@ -65,26 +71,36 @@ To proceed, stage the new modifications and proceed with your Git commit.
 Running tests
 =============
 
-To test the library, run tox_, which tests the library the same way that the CI workflow does:
+To run all Safir tests, run:
 
-.. code-block:: sh
+.. prompt:: bash
 
-   tox run
+   nox -s
 
-To see a listing of test environments, run:
+This tests the library in the same way that the CI workflow does.
+You may wish to run the individual sessions (``lint``, ``typing``, ``test``, ``docs``, and ``docs-linkcheck``) when iterating on a specific change.
+Consider using the ``-R`` flag when you haven't updated dependencies, as discussed below.
 
-.. code-block:: sh
+To see a listing of nox sessions:
 
-   tox list
+.. prompt:: bash
 
-tox will start a PostgreSQL container, which is required for some tests.
+   nox --list
 
-To run a specific test or list of tests, you can add test file names (and any other pytest_ options) after ``--`` when executing the ``py`` tox environment.
+To run a specific test or list of tests, you can add test file names (and any other pytest_ options) after ``--`` when executing the ``test`` nox session.
 For example:
 
-.. code-block:: sh
+.. prompt:: bash
+
+   nox -s test -- safir/tests/database_test.py
 
-   tox run -e py -- tests/database_test.py
+If you are interating on a specific test failure, you may want to pass the ``-R`` flag to skip the dependency installation step.
+This will make nox run much faster, at the cost of not fixing out-of-date dependencies.
+For example:
+
+.. prompt:: bash
+
+   nox -Rs test -- safir/tests/database_test.py
 
 .. _dev-build-docs:
 
@@ -95,12 +111,29 @@ Documentation is built with Sphinx_:
 
 .. _Sphinx: https://www.sphinx-doc.org/en/master/
 
-.. code-block:: sh
+.. prompt:: bash
 
-   tox run -e docs
+   nox -s docs
 
 The build documentation is located in the :file:`docs/_build/html` directory.
 
+Additional dependencies required for the documentation build should be added as development dependencies of the ``safir`` library, in :file:`safir/pyproject.toml`.
+
+Documentation builds are incremental, and generate and use cached descriptions of the internal Python APIs.
+If you see errors in building the Python API documentation or have problems with changes to the documentation (particularly diagrams) not showing up, try a clean documentation build with:
+
+.. prompt:: bash
+
+   nox -s docs-clean
+
+This will be slower, but it will ensure that the documentation build doesn't rely on any cached data.
+
+To check the documentation for broken links, run:
+
+.. code-block:: sh
+
+   nox -s docs-linkcheck
+
 .. _dev-change-log:
 
 Updating the change log
@@ -136,7 +169,7 @@ Style guide
 Code
 ----
 
-- The code style follows :pep:`8`, though in practice lean on Black and isort to format the code for you.
+- The code style follows :pep:`8`, though in practice lean on Ruff to format the code for you.
 
 - Use :pep:`484` type annotations.
   The ``tox run -e typing`` test environment, which runs mypy_, ensures that the project's types are consistent.
diff --git a/noxfile.py b/noxfile.py
new file mode 100644
index 00000000..0238c11a
--- /dev/null
+++ b/noxfile.py
@@ -0,0 +1,183 @@
+"""nox build configuration for Safir."""
+
+import shutil
+import sys
+from pathlib import Path
+
+import nox
+from nox.command import CommandFailed
+
+# Default sessions
+nox.options.sessions = [
+    "lint",
+    "typing",
+    "test",
+    "docs",
+    "docs-linkcheck",
+]
+
+# Other nox defaults
+nox.options.default_venv_backend = "uv"
+nox.options.reuse_existing_virtualenvs = True
+
+
+def _install(session: nox.Session) -> None:
+    """Install the application and all dependencies into the session."""
+    session.install("--upgrade", "uv")
+    session.install("-e", "./safir[arq,db,dev,gcs,kubernetes,redis]")
+
+
+def _install_dev(session: nox.Session, bin_prefix: str = "") -> None:
+    """Install the application and dev dependencies into the session."""
+    python = f"{bin_prefix}python"
+    precommit = f"{bin_prefix}pre-commit"
+
+    # Install dev dependencies
+    session.run(python, "-m", "pip", "install", "uv", external=True)
+    for args in (("nox[uv]", "pre-commit"), ("-e", "./safir[dev]")):
+        session.run(python, "-m", "uv", "pip", "install", *args, external=True)
+
+    # Install pre-commit hooks
+    session.run(precommit, "install", external=True)
+
+
+def _pytest(
+    session: nox.Session, directory: str, module: str, *, coverage: bool = True
+) -> None:
+    """Run pytest for the given directory and module, if needed."""
+    generic = []
+    per_directory = []
+    found_per_directory = False
+    for arg in session.posargs:
+        if arg.startswith("-"):
+            generic.append(arg)
+        elif arg.startswith(f"{directory}/"):
+            per_directory.append(arg.removeprefix(f"{directory}/"))
+            found_per_directory = True
+        elif "/" in arg and Path(arg).exists():
+            found_per_directory = True
+        else:
+            generic.append(arg)
+    if not session.posargs or not found_per_directory or per_directory:
+        args = []
+        if coverage:
+            args.extend([f"--cov={module}", "--cov-branch", "--cov-report="])
+        with session.chdir(directory):
+            session.run(
+                "pytest",
+                *args,
+                *generic,
+                *per_directory,
+            )
+
+
+@nox.session(name="venv-init", venv_backend="virtualenv")
+def venv_init(session: nox.Session) -> None:
+    """Set up a development venv.
+
+    Create a venv in the current directory, replacing any existing one.
+    """
+    session.run("python", "-m", "venv", ".venv", "--clear")
+    _install_dev(session, bin_prefix=".venv/bin/")
+
+    print(
+        "\nTo activate this virtual env, run:\n\n\tsource .venv/bin/activate\n"
+    )
+
+
+@nox.session(name="init", python=False)
+def init(session: nox.Session) -> None:
+    """Set up the development environment in the current virtual env."""
+    _install_dev(session, bin_prefix="")
+
+
+@nox.session
+def lint(session: nox.Session) -> None:
+    """Run pre-commit hooks."""
+    session.install("--upgrade", "pre-commit")
+    session.run("pre-commit", "run", "--all-files", *session.posargs)
+
+
+@nox.session
+def typing(session: nox.Session) -> None:
+    """Check type annotations with mypy."""
+    _install(session)
+    session.run(
+        "mypy",
+        *session.posargs,
+        "noxfile.py",
+        "safir/src",
+        "safir/tests",
+    )
+
+
+@nox.session
+def test(session: nox.Session) -> None:
+    """Run tests of Safir."""
+    _install(session)
+    _pytest(session, "safir", "safir", coverage=True)
+
+
+@nox.session
+def docs(session: nox.Session) -> None:
+    """Build the documentation."""
+    _install(session)
+    doctree_dir = (session.cache_dir / "doctrees").absolute()
+    with session.chdir("docs"):
+        session.run(
+            "sphinx-build",
+            "-W",
+            "--keep-going",
+            "-n",
+            "-T",
+            "-b",
+            "html",
+            "-d",
+            str(doctree_dir),
+            ".",
+            "./_build/html",
+        )
+
+
+@nox.session(name="docs-clean")
+def docs_clean(session: nox.Session) -> None:
+    """Build the documentation without any cache."""
+    if Path("docs/_build").exists():
+        shutil.rmtree("docs/_build")
+    if Path("docs/api").exists():
+        shutil.rmtree("docs/api")
+    docs(session)
+
+
+@nox.session(name="docs-linkcheck")
+def docs_linkcheck(session: nox.Session) -> None:
+    """Check documentation links."""
+    _install(session)
+    doctree_dir = (session.cache_dir / "doctrees").absolute()
+    with session.chdir("docs"):
+        try:
+            session.run(
+                "sphinx-build",
+                "-W",
+                "--keep-going",
+                "-n",
+                "-T",
+                "-blinkcheck",
+                "-d",
+                str(doctree_dir),
+                ".",
+                "./_build/linkcheck",
+            )
+        except CommandFailed:
+            output_path = Path("_build") / "linkcheck" / "output.txt"
+            if output_path.exists():
+                sys.stdout.write(output_path.read_text())
+            session.error("Link check reported errors")
+
+
+@nox.session(name="update-deps")
+def update_deps(session: nox.Session) -> None:
+    """Update pre-commit hooks."""
+    session.install("--upgrade", "uv")
+    session.run("uv", "pip", "install", "pre-commit")
+    session.run("pre-commit", "autoupdate")
diff --git a/pyproject.toml b/pyproject.toml
index 55e53350..dd845afa 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,124 +1,10 @@
-[project]
-# https://packaging.python.org/en/latest/specifications/declaring-project-metadata/
-name = "safir"
-description = "The Rubin Observatory SQuaRE framework for FastAPI services."
-license = {file = "LICENSE"}
-readme= "README.md"
-keywords = [
-    "rubin",
-    "lsst",
-]
-# https://pypi.org/classifiers/
-classifiers = [
-    "Development Status :: 5 - Production/Stable",
-    "License :: OSI Approved :: MIT License",
-    "Programming Language :: Python",
-    "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.11",
-    "Programming Language :: Python :: 3.12",
-    "Intended Audience :: Developers",
-    "Natural Language :: English",
-    "Operating System :: POSIX",
-    "Typing :: Typed",
-]
-requires-python = ">=3.11"
-dependencies = [
-    "click<9",
-    "cryptography<44",
-    "fastapi<1",
-    "gidgethub<6",
-    "httpx>=0.20.0,<1",
-    "pydantic>2,<3",
-    "pydantic-core",
-    "starlette<1",
-    # 23.3.0 excluded due to https://github.com/hynek/structlog/issues/584
-    "structlog>=21.2.0,!=23.3.0",
-]
-dynamic = ["version"]
-
-[project.optional-dependencies]
-arq = [
-    "arq>=0.23,<1"
-]
-db = [
-    "asyncpg<1",
-    "sqlalchemy[asyncio]>=1.4.18,<3",
-]
-dev = [
-    "asgi-lifespan",
-    "coverage[toml]",
-    "fastapi>=0.93.0",
-    "mypy",
-    "pre-commit",
-    "psycopg2",
-    "pytest",
-    "pytest-asyncio",
-    "redis>=5,<6",
-    "respx",
-    "scriv",
-    "sqlalchemy[mypy]",
-    "testcontainers[postgres,redis]",
-    "uvicorn",
-    # documentation
-    "documenteer[guide]>=1",
-    "autodoc_pydantic",
-]
-gcs = [
-    "google-auth<3",
-    "google-cloud-storage<3"
-]
-kubernetes = [
-    "kubernetes_asyncio<31"
-]
-redis = [
-    "redis>4.5.2,<6",
-]
-
-[[project.authors]]
-name = "Association of Universities for Research in Astronomy, Inc. (AURA)"
-email = "sqre-admin@lists.lsst.org"
-
-[project.urls]
-Homepage = "https://safir.lsst.io"
-Source = "https://github.com/lsst-sqre/safir"
-"Change log" = "https://safir.lsst.io/changelog.html"
-"Issue tracker" = "https://github.com/lsst-sqre/safir/issues"
-
-[build-system]
-requires = [
-    "setuptools>=61",
-    "wheel",
-    "setuptools_scm[toml]>=6.2"
-]
-build-backend = "setuptools.build_meta"
-
-[tool.setuptools_scm]
-
-[tool.coverage.run]
-parallel = true
-branch = true
-source = ["safir"]
-
-[tool.coverage.paths]
-source = ["src", ".tox/*/site-packages"]
-
-[tool.coverage.report]
-show_missing = true
-exclude_lines = [
-    "pragma: no cover",
-    "def __repr__",
-    "if self.debug:",
-    "if settings.DEBUG",
-    "raise AssertionError",
-    "raise NotImplementedError",
-    "if 0:",
-    "if __name__ == .__main__.:",
-    "if TYPE_CHECKING:"
-]
+# This file contains only the tool configuration for linters. The
+# configuration for the component Python projects may be found in the
+# pyproject.toml files in subdirectories.
 
 [tool.black]
 line-length = 79
-target-version = ["py311"]
+target-version = ["py312"]
 exclude = '''
 /(
     \.eggs
@@ -134,26 +20,6 @@ exclude = '''
 # Use single-quoted strings so TOML treats the string like a Python r-string
 # Multi-line strings are implicitly treated by black as regular expressions
 
-[tool.pytest.ini_options]
-asyncio_mode = "strict"
-filterwarnings = [
-    # Google modules call a deprecated pkg_resources API.
-    "ignore:pkg_resources is deprecated as an API:DeprecationWarning",
-    "ignore:.*pkg_resources\\.declare_namespace:DeprecationWarning",
-    # Google modules use PyType_Spec in a deprecated way.
-    "ignore:Type google\\..*metaclass.* custom tp_new:DeprecationWarning",
-    # dateutil uses a deprecated datetime function.
-    "ignore:datetime.datetime.utcfromtimestamp:DeprecationWarning:dateutil.*",
-    # The point of this test is to test handling of datetime-naive UTC
-    # objects, which is what the deprecation warning is about. We want to
-    # continue doing this until the support has been removed entirely.
-    "ignore:datetime.datetime.utcnow:DeprecationWarning:tests.pydantic_test",
-]
-python_files = [
-    "tests/*.py",
-    "tests/*/*.py"
-]
-
 [tool.mypy]
 disallow_untyped_defs = true
 disallow_incomplete_defs = true
@@ -182,12 +48,26 @@ warn_untyped_fields = true
 extend = "ruff-shared.toml"
 
 [tool.ruff.lint.extend-per-file-ignores]
-"src/safir/**" = [
+"noxfile.py" = [
+    "T201",    # print makes sense as output from nox rules
+]
+"safir/src/safir/**" = [
     "N818",    # Exception is correct in some cases, others are part of API
 ]
-"src/safir/testing/**" = [
+"safir/src/safir/testing/**" = [
     "S101",    # test support functions are allowed to use assert
 ]
+"*/tests/**" = [
+    "C901",    # tests are allowed to be complex, sometimes that's convenient
+    "D101",    # tests don't need docstrings
+    "D103",    # tests don't need docstrings
+    "PLR0915", # tests are allowed to be long, sometimes that's convenient
+    "PT012",   # way too aggressive about limiting pytest.raises blocks
+    "S101",    # tests should use assert
+    "S106",    # tests are allowed to hard-code dummy passwords
+    "S301",    # allow tests for whether code can be pickled
+    "SLF001",  # tests are allowed to access private members
+]
 
 [tool.ruff.lint.isort]
 known-first-party = ["safir", "tests"]
diff --git a/safir/LICENSE b/safir/LICENSE
new file mode 120000
index 00000000..ea5b6064
--- /dev/null
+++ b/safir/LICENSE
@@ -0,0 +1 @@
+../LICENSE
\ No newline at end of file
diff --git a/safir/README.md b/safir/README.md
new file mode 120000
index 00000000..32d46ee8
--- /dev/null
+++ b/safir/README.md
@@ -0,0 +1 @@
+../README.md
\ No newline at end of file
diff --git a/safir/pyproject.toml b/safir/pyproject.toml
new file mode 100644
index 00000000..5c93a0c6
--- /dev/null
+++ b/safir/pyproject.toml
@@ -0,0 +1,139 @@
+[project]
+# https://packaging.python.org/en/latest/specifications/declaring-project-metadata/
+name = "safir"
+description = "The Rubin Observatory SQuaRE framework for FastAPI services."
+license = {file = "LICENSE"}
+readme= "README.md"
+keywords = [
+    "rubin",
+    "lsst",
+]
+# https://pypi.org/classifiers/
+classifiers = [
+    "Development Status :: 5 - Production/Stable",
+    "License :: OSI Approved :: MIT License",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Intended Audience :: Developers",
+    "Natural Language :: English",
+    "Operating System :: POSIX",
+    "Typing :: Typed",
+]
+requires-python = ">=3.11"
+dependencies = [
+    "click<9",
+    "cryptography<44",
+    "fastapi<1",
+    "gidgethub<6",
+    "httpx>=0.20.0,<1",
+    "pydantic>2,<3",
+    "pydantic-core",
+    "starlette<1",
+    # 23.3.0 excluded due to https://github.com/hynek/structlog/issues/584
+    "structlog>=21.2.0,!=23.3.0",
+]
+dynamic = ["version"]
+
+[project.optional-dependencies]
+arq = [
+    "arq>=0.23,<1"
+]
+db = [
+    "asyncpg<1",
+    "sqlalchemy[asyncio]>=1.4.18,<3",
+]
+dev = [
+    "asgi-lifespan",
+    "coverage[toml]",
+    "fastapi>=0.93.0",
+    "mypy",
+    "pre-commit",
+    "psycopg2",
+    "pytest",
+    "pytest-asyncio",
+    "pytest-cov",
+    "redis>=5,<6",
+    "respx",
+    "scriv",
+    "sqlalchemy[mypy]",
+    "testcontainers[postgres,redis]",
+    "uvicorn",
+    # documentation
+    "documenteer[guide]>=1",
+    "autodoc_pydantic",
+]
+gcs = [
+    "google-auth<3",
+    "google-cloud-storage<3"
+]
+kubernetes = [
+    "kubernetes_asyncio<31"
+]
+redis = [
+    "redis>4.5.2,<6",
+]
+
+[[project.authors]]
+name = "Association of Universities for Research in Astronomy, Inc. (AURA)"
+email = "sqre-admin@lists.lsst.org"
+
+[project.urls]
+Homepage = "https://safir.lsst.io"
+Source = "https://github.com/lsst-sqre/safir"
+"Change log" = "https://safir.lsst.io/changelog.html"
+"Issue tracker" = "https://github.com/lsst-sqre/safir/issues"
+
+[build-system]
+requires = [
+    "setuptools>=61",
+    "wheel",
+    "setuptools_scm[toml]>=6.2"
+]
+build-backend = "setuptools.build_meta"
+
+[tool.setuptools_scm]
+root = ".."
+
+[tool.coverage.run]
+parallel = true
+branch = true
+source = ["safir"]
+
+[tool.coverage.paths]
+source = ["src", ".tox/*/site-packages"]
+
+[tool.coverage.report]
+show_missing = true
+exclude_lines = [
+    "pragma: no cover",
+    "def __repr__",
+    "if self.debug:",
+    "if settings.DEBUG",
+    "raise AssertionError",
+    "raise NotImplementedError",
+    "if 0:",
+    "if __name__ == .__main__.:",
+    "if TYPE_CHECKING:"
+]
+
+[tool.pytest.ini_options]
+asyncio_mode = "strict"
+filterwarnings = [
+    # Google modules call a deprecated pkg_resources API.
+    "ignore:pkg_resources is deprecated as an API:DeprecationWarning",
+    "ignore:.*pkg_resources\\.declare_namespace:DeprecationWarning",
+    # Google modules use PyType_Spec in a deprecated way.
+    "ignore:Type google\\..*metaclass.* custom tp_new:DeprecationWarning",
+    # dateutil uses a deprecated datetime function.
+    "ignore:datetime.datetime.utcfromtimestamp:DeprecationWarning:dateutil.*",
+    # The point of this test is to test handling of datetime-naive UTC
+    # objects, which is what the deprecation warning is about. We want to
+    # continue doing this until the support has been removed entirely.
+    "ignore:datetime.datetime.utcnow:DeprecationWarning:tests.pydantic_test",
+]
+python_files = [
+    "tests/*.py",
+    "tests/*/*.py"
+]
diff --git a/src/safir/__init__.py b/safir/src/safir/__init__.py
similarity index 100%
rename from src/safir/__init__.py
rename to safir/src/safir/__init__.py
diff --git a/src/safir/arq.py b/safir/src/safir/arq.py
similarity index 100%
rename from src/safir/arq.py
rename to safir/src/safir/arq.py
diff --git a/src/safir/asyncio.py b/safir/src/safir/asyncio.py
similarity index 100%
rename from src/safir/asyncio.py
rename to safir/src/safir/asyncio.py
diff --git a/src/safir/click.py b/safir/src/safir/click.py
similarity index 100%
rename from src/safir/click.py
rename to safir/src/safir/click.py
diff --git a/src/safir/database/__init__.py b/safir/src/safir/database/__init__.py
similarity index 100%
rename from src/safir/database/__init__.py
rename to safir/src/safir/database/__init__.py
diff --git a/src/safir/database/_connection.py b/safir/src/safir/database/_connection.py
similarity index 100%
rename from src/safir/database/_connection.py
rename to safir/src/safir/database/_connection.py
diff --git a/src/safir/database/_datetime.py b/safir/src/safir/database/_datetime.py
similarity index 100%
rename from src/safir/database/_datetime.py
rename to safir/src/safir/database/_datetime.py
diff --git a/src/safir/database/_initialize.py b/safir/src/safir/database/_initialize.py
similarity index 100%
rename from src/safir/database/_initialize.py
rename to safir/src/safir/database/_initialize.py
diff --git a/src/safir/database/_retry.py b/safir/src/safir/database/_retry.py
similarity index 100%
rename from src/safir/database/_retry.py
rename to safir/src/safir/database/_retry.py
diff --git a/src/safir/datetime.py b/safir/src/safir/datetime.py
similarity index 100%
rename from src/safir/datetime.py
rename to safir/src/safir/datetime.py
diff --git a/src/safir/dependencies/__init__.py b/safir/src/safir/dependencies/__init__.py
similarity index 100%
rename from src/safir/dependencies/__init__.py
rename to safir/src/safir/dependencies/__init__.py
diff --git a/src/safir/dependencies/arq.py b/safir/src/safir/dependencies/arq.py
similarity index 100%
rename from src/safir/dependencies/arq.py
rename to safir/src/safir/dependencies/arq.py
diff --git a/src/safir/dependencies/db_session.py b/safir/src/safir/dependencies/db_session.py
similarity index 100%
rename from src/safir/dependencies/db_session.py
rename to safir/src/safir/dependencies/db_session.py
diff --git a/src/safir/dependencies/gafaelfawr.py b/safir/src/safir/dependencies/gafaelfawr.py
similarity index 100%
rename from src/safir/dependencies/gafaelfawr.py
rename to safir/src/safir/dependencies/gafaelfawr.py
diff --git a/src/safir/dependencies/http_client.py b/safir/src/safir/dependencies/http_client.py
similarity index 100%
rename from src/safir/dependencies/http_client.py
rename to safir/src/safir/dependencies/http_client.py
diff --git a/src/safir/dependencies/logger.py b/safir/src/safir/dependencies/logger.py
similarity index 100%
rename from src/safir/dependencies/logger.py
rename to safir/src/safir/dependencies/logger.py
diff --git a/src/safir/fastapi.py b/safir/src/safir/fastapi.py
similarity index 100%
rename from src/safir/fastapi.py
rename to safir/src/safir/fastapi.py
diff --git a/src/safir/gcs.py b/safir/src/safir/gcs.py
similarity index 100%
rename from src/safir/gcs.py
rename to safir/src/safir/gcs.py
diff --git a/src/safir/github/__init__.py b/safir/src/safir/github/__init__.py
similarity index 100%
rename from src/safir/github/__init__.py
rename to safir/src/safir/github/__init__.py
diff --git a/src/safir/github/_client.py b/safir/src/safir/github/_client.py
similarity index 100%
rename from src/safir/github/_client.py
rename to safir/src/safir/github/_client.py
diff --git a/src/safir/github/models.py b/safir/src/safir/github/models.py
similarity index 100%
rename from src/safir/github/models.py
rename to safir/src/safir/github/models.py
diff --git a/src/safir/github/webhooks.py b/safir/src/safir/github/webhooks.py
similarity index 100%
rename from src/safir/github/webhooks.py
rename to safir/src/safir/github/webhooks.py
diff --git a/src/safir/kubernetes.py b/safir/src/safir/kubernetes.py
similarity index 100%
rename from src/safir/kubernetes.py
rename to safir/src/safir/kubernetes.py
diff --git a/src/safir/logging.py b/safir/src/safir/logging.py
similarity index 100%
rename from src/safir/logging.py
rename to safir/src/safir/logging.py
diff --git a/src/safir/metadata.py b/safir/src/safir/metadata.py
similarity index 100%
rename from src/safir/metadata.py
rename to safir/src/safir/metadata.py
diff --git a/src/safir/middleware/__init__.py b/safir/src/safir/middleware/__init__.py
similarity index 100%
rename from src/safir/middleware/__init__.py
rename to safir/src/safir/middleware/__init__.py
diff --git a/src/safir/middleware/ivoa.py b/safir/src/safir/middleware/ivoa.py
similarity index 100%
rename from src/safir/middleware/ivoa.py
rename to safir/src/safir/middleware/ivoa.py
diff --git a/src/safir/middleware/x_forwarded.py b/safir/src/safir/middleware/x_forwarded.py
similarity index 100%
rename from src/safir/middleware/x_forwarded.py
rename to safir/src/safir/middleware/x_forwarded.py
diff --git a/src/safir/models.py b/safir/src/safir/models.py
similarity index 100%
rename from src/safir/models.py
rename to safir/src/safir/models.py
diff --git a/src/safir/py.typed b/safir/src/safir/py.typed
similarity index 100%
rename from src/safir/py.typed
rename to safir/src/safir/py.typed
diff --git a/src/safir/pydantic.py b/safir/src/safir/pydantic.py
similarity index 100%
rename from src/safir/pydantic.py
rename to safir/src/safir/pydantic.py
diff --git a/src/safir/redis.py b/safir/src/safir/redis.py
similarity index 100%
rename from src/safir/redis.py
rename to safir/src/safir/redis.py
diff --git a/src/safir/slack/__init__.py b/safir/src/safir/slack/__init__.py
similarity index 100%
rename from src/safir/slack/__init__.py
rename to safir/src/safir/slack/__init__.py
diff --git a/src/safir/slack/blockkit.py b/safir/src/safir/slack/blockkit.py
similarity index 100%
rename from src/safir/slack/blockkit.py
rename to safir/src/safir/slack/blockkit.py
diff --git a/src/safir/slack/webhook.py b/safir/src/safir/slack/webhook.py
similarity index 100%
rename from src/safir/slack/webhook.py
rename to safir/src/safir/slack/webhook.py
diff --git a/src/safir/testing/__init__.py b/safir/src/safir/testing/__init__.py
similarity index 100%
rename from src/safir/testing/__init__.py
rename to safir/src/safir/testing/__init__.py
diff --git a/src/safir/testing/gcs.py b/safir/src/safir/testing/gcs.py
similarity index 100%
rename from src/safir/testing/gcs.py
rename to safir/src/safir/testing/gcs.py
diff --git a/src/safir/testing/kubernetes.py b/safir/src/safir/testing/kubernetes.py
similarity index 99%
rename from src/safir/testing/kubernetes.py
rename to safir/src/safir/testing/kubernetes.py
index b10a0eec..22b15d7f 100644
--- a/src/safir/testing/kubernetes.py
+++ b/safir/src/safir/testing/kubernetes.py
@@ -9,7 +9,7 @@
 from collections import defaultdict
 from collections.abc import AsyncIterator, Callable, Iterator
 from datetime import timedelta
-from typing import Any
+from typing import Any, Protocol
 from unittest.mock import AsyncMock, Mock, patch
 
 from kubernetes_asyncio import client, config
@@ -44,7 +44,6 @@
     V1ServiceList,
     V1Status,
 )
-from typing_extensions import Protocol
 
 from ..asyncio import AsyncMultiQueue
 
diff --git a/src/safir/testing/slack.py b/safir/src/safir/testing/slack.py
similarity index 100%
rename from src/safir/testing/slack.py
rename to safir/src/safir/testing/slack.py
diff --git a/src/safir/testing/uvicorn.py b/safir/src/safir/testing/uvicorn.py
similarity index 100%
rename from src/safir/testing/uvicorn.py
rename to safir/src/safir/testing/uvicorn.py
diff --git a/tests/__init__.py b/safir/tests/__init__.py
similarity index 100%
rename from tests/__init__.py
rename to safir/tests/__init__.py
diff --git a/tests/arq_test.py b/safir/tests/arq_test.py
similarity index 100%
rename from tests/arq_test.py
rename to safir/tests/arq_test.py
diff --git a/tests/asyncio_test.py b/safir/tests/asyncio_test.py
similarity index 100%
rename from tests/asyncio_test.py
rename to safir/tests/asyncio_test.py
diff --git a/tests/click_test.py b/safir/tests/click_test.py
similarity index 100%
rename from tests/click_test.py
rename to safir/tests/click_test.py
diff --git a/tests/conftest.py b/safir/tests/conftest.py
similarity index 100%
rename from tests/conftest.py
rename to safir/tests/conftest.py
diff --git a/tests/database_test.py b/safir/tests/database_test.py
similarity index 100%
rename from tests/database_test.py
rename to safir/tests/database_test.py
diff --git a/tests/datetime_test.py b/safir/tests/datetime_test.py
similarity index 100%
rename from tests/datetime_test.py
rename to safir/tests/datetime_test.py
diff --git a/tests/dependencies/__init__.py b/safir/tests/dependencies/__init__.py
similarity index 100%
rename from tests/dependencies/__init__.py
rename to safir/tests/dependencies/__init__.py
diff --git a/tests/dependencies/arq_test.py b/safir/tests/dependencies/arq_test.py
similarity index 100%
rename from tests/dependencies/arq_test.py
rename to safir/tests/dependencies/arq_test.py
diff --git a/tests/dependencies/db_session_test.py b/safir/tests/dependencies/db_session_test.py
similarity index 100%
rename from tests/dependencies/db_session_test.py
rename to safir/tests/dependencies/db_session_test.py
diff --git a/tests/dependencies/gafaelfawr_test.py b/safir/tests/dependencies/gafaelfawr_test.py
similarity index 100%
rename from tests/dependencies/gafaelfawr_test.py
rename to safir/tests/dependencies/gafaelfawr_test.py
diff --git a/tests/dependencies/http_client_test.py b/safir/tests/dependencies/http_client_test.py
similarity index 100%
rename from tests/dependencies/http_client_test.py
rename to safir/tests/dependencies/http_client_test.py
diff --git a/tests/dependencies/logger_test.py b/safir/tests/dependencies/logger_test.py
similarity index 100%
rename from tests/dependencies/logger_test.py
rename to safir/tests/dependencies/logger_test.py
diff --git a/tests/fastapi_test.py b/safir/tests/fastapi_test.py
similarity index 100%
rename from tests/fastapi_test.py
rename to safir/tests/fastapi_test.py
diff --git a/tests/gcs_test.py b/safir/tests/gcs_test.py
similarity index 100%
rename from tests/gcs_test.py
rename to safir/tests/gcs_test.py
diff --git a/tests/github/__init__.py b/safir/tests/github/__init__.py
similarity index 100%
rename from tests/github/__init__.py
rename to safir/tests/github/__init__.py
diff --git a/tests/github/data/webhooks/check_run_created.json b/safir/tests/github/data/webhooks/check_run_created.json
similarity index 100%
rename from tests/github/data/webhooks/check_run_created.json
rename to safir/tests/github/data/webhooks/check_run_created.json
diff --git a/tests/github/data/webhooks/check_suite_completed.json b/safir/tests/github/data/webhooks/check_suite_completed.json
similarity index 100%
rename from tests/github/data/webhooks/check_suite_completed.json
rename to safir/tests/github/data/webhooks/check_suite_completed.json
diff --git a/tests/github/data/webhooks/installation.json b/safir/tests/github/data/webhooks/installation.json
similarity index 100%
rename from tests/github/data/webhooks/installation.json
rename to safir/tests/github/data/webhooks/installation.json
diff --git a/tests/github/data/webhooks/installation_repositories.json b/safir/tests/github/data/webhooks/installation_repositories.json
similarity index 100%
rename from tests/github/data/webhooks/installation_repositories.json
rename to safir/tests/github/data/webhooks/installation_repositories.json
diff --git a/tests/github/data/webhooks/pull_request_event.json b/safir/tests/github/data/webhooks/pull_request_event.json
similarity index 100%
rename from tests/github/data/webhooks/pull_request_event.json
rename to safir/tests/github/data/webhooks/pull_request_event.json
diff --git a/tests/github/data/webhooks/push_event.json b/safir/tests/github/data/webhooks/push_event.json
similarity index 100%
rename from tests/github/data/webhooks/push_event.json
rename to safir/tests/github/data/webhooks/push_event.json
diff --git a/tests/github/webhooks_test.py b/safir/tests/github/webhooks_test.py
similarity index 100%
rename from tests/github/webhooks_test.py
rename to safir/tests/github/webhooks_test.py
diff --git a/tests/kubernetes_test.py b/safir/tests/kubernetes_test.py
similarity index 100%
rename from tests/kubernetes_test.py
rename to safir/tests/kubernetes_test.py
diff --git a/tests/logging_test.py b/safir/tests/logging_test.py
similarity index 100%
rename from tests/logging_test.py
rename to safir/tests/logging_test.py
diff --git a/tests/metadata_test.py b/safir/tests/metadata_test.py
similarity index 100%
rename from tests/metadata_test.py
rename to safir/tests/metadata_test.py
diff --git a/tests/middleware/__init__.py b/safir/tests/middleware/__init__.py
similarity index 100%
rename from tests/middleware/__init__.py
rename to safir/tests/middleware/__init__.py
diff --git a/tests/middleware/ivoa_test.py b/safir/tests/middleware/ivoa_test.py
similarity index 100%
rename from tests/middleware/ivoa_test.py
rename to safir/tests/middleware/ivoa_test.py
diff --git a/tests/middleware/x_forwarded_test.py b/safir/tests/middleware/x_forwarded_test.py
similarity index 100%
rename from tests/middleware/x_forwarded_test.py
rename to safir/tests/middleware/x_forwarded_test.py
diff --git a/tests/models_test.py b/safir/tests/models_test.py
similarity index 100%
rename from tests/models_test.py
rename to safir/tests/models_test.py
diff --git a/tests/pydantic_test.py b/safir/tests/pydantic_test.py
similarity index 100%
rename from tests/pydantic_test.py
rename to safir/tests/pydantic_test.py
diff --git a/tests/redis_test.py b/safir/tests/redis_test.py
similarity index 100%
rename from tests/redis_test.py
rename to safir/tests/redis_test.py
diff --git a/tests/safir_test.py b/safir/tests/safir_test.py
similarity index 100%
rename from tests/safir_test.py
rename to safir/tests/safir_test.py
diff --git a/tests/slack/__init__.py b/safir/tests/slack/__init__.py
similarity index 100%
rename from tests/slack/__init__.py
rename to safir/tests/slack/__init__.py
diff --git a/tests/slack/blockkit_test.py b/safir/tests/slack/blockkit_test.py
similarity index 100%
rename from tests/slack/blockkit_test.py
rename to safir/tests/slack/blockkit_test.py
diff --git a/tests/slack/webhook_test.py b/safir/tests/slack/webhook_test.py
similarity index 100%
rename from tests/slack/webhook_test.py
rename to safir/tests/slack/webhook_test.py
diff --git a/tests/testing/__init__.py b/safir/tests/testing/__init__.py
similarity index 100%
rename from tests/testing/__init__.py
rename to safir/tests/testing/__init__.py
diff --git a/tests/testing/conftest.py b/safir/tests/testing/conftest.py
similarity index 100%
rename from tests/testing/conftest.py
rename to safir/tests/testing/conftest.py
diff --git a/tests/testing/gcs_test.py b/safir/tests/testing/gcs_test.py
similarity index 100%
rename from tests/testing/gcs_test.py
rename to safir/tests/testing/gcs_test.py
diff --git a/tests/testing/kubernetes_test.py b/safir/tests/testing/kubernetes_test.py
similarity index 100%
rename from tests/testing/kubernetes_test.py
rename to safir/tests/testing/kubernetes_test.py