Add dedicated uv guide and related docs links

docs/user/build-customization.rst

@@ -429,7 +429,10 @@ Take a look at the following example:
 Install dependencies with ``uv``
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-Projects managed with `uv <https://github.com/astral-sh/uv/>`__ can install `uv` with asdf,
+For a complete guide with multiple ``uv`` workflows and recommendations,
+see :doc:`/guides/uv`.
+
+Projects managed with `uv <https://github.com/astral-sh/uv/>`__ can install ``uv`` with asdf,
 and then rely on it to set up the environment and install the python project and its dependencies.
 Read the Docs' own build steps expect it by setting the ``UV_PROJECT_ENVIRONMENT`` variable,
 usually reducing the time taken to install compared to pip.
@@ -457,8 +460,8 @@ If a ``uv.lock`` file exists it is respected.
       jobs:
          pre_create_environment:
             - asdf plugin add uv
-            - asdf install uv latest
-            - asdf global uv latest
+            - asdf install uv 0.10.6
+            - asdf global uv 0.10.6
          create_environment:
             - uv venv "${READTHEDOCS_VIRTUALENV_PATH}"
          install:

docs/user/guides/build/index.rst

@@ -15,6 +15,9 @@ How-to guides: build process
 ⏩️ :doc:`Using custom environment variables </guides/environment-variables>`
     Extra environment variables, for instance secrets, may be needed in the build process and can be defined from the project's :term:`dashboard`.
 
+⏩️ :doc:`Using uv on Read the Docs </guides/uv>`
+    Use ``uv`` with lockfile-based or requirements-based workflows for your documentation builds.
+
 ⏩️ :doc:`Managing versions automatically </guides/automation-rules>`
     Automating your versioning on Read the Docs means you only have to handle your versioning logic in Git.
     Learn how to define rules to automate creation of new versions on Read the Docs,
@@ -38,5 +41,6 @@ How-to guides: build process
    /guides/build/webhooks
    Configuring pull request builds </guides/pull-requests>
    Using custom environment variables </guides/environment-variables>
+   Using uv on Read the Docs </guides/uv>
    Managing versions automatically </guides/automation-rules>
    Skip builds based on conditions </guides/build/skip-build>

docs/user/guides/uv.rst

@@ -0,0 +1,162 @@
+Using ``uv`` on Read the Docs
+=============================
+
+`uv <https://github.com/astral-sh/uv/>`__ can be used on Read the Docs to install documentation dependencies quickly.
+You can use it as a full project manager with ``uv.lock``,
+or as a faster installer for existing ``requirements.txt`` files.
+
+This guide shows recommended patterns for both Sphinx and MkDocs projects.
+
+.. contents:: Contents
+   :local:
+   :depth: 2
+
+Recommended approach: ``uv`` project with ``uv.lock``
+------------------------------------------------------
+
+For most projects, we recommend:
+
+* Defining docs dependencies in a ``docs`` dependency group in ``pyproject.toml``.
+* Committing ``uv.lock`` to your repository.
+* Using ``uv sync --frozen`` in Read the Docs builds.
+* Pinning your ``uv`` version instead of using ``latest``.
+
+This gives you the most :term:`reproducible` setup and keeps local and hosted builds aligned.
+
+.. code-block:: yaml
+   :caption: .readthedocs.yaml
+
+   version: 2
+
+   sphinx:
+     configuration: docs/conf.py
+
+   build:
+     os: "ubuntu-24.04"
+     tools:
+       python: "3.13"
+     jobs:
+       pre_create_environment:
+         - asdf plugin add uv
+         - asdf install uv 0.10.6
+         - asdf global uv 0.10.6
+       create_environment:
+         - uv venv "$READTHEDOCS_VIRTUALENV_PATH"
+       install:
+         - UV_PROJECT_ENVIRONMENT="$READTHEDOCS_VIRTUALENV_PATH" uv sync --frozen --group docs
+
+.. note::
+
+   If your docs require optional dependencies,
+   add them with ``--extra <name>`` or ``--all-extras`` in the ``uv sync`` command.
+
+Alternative: ``uv`` project without lock file enforcement
+---------------------------------------------------------
+
+If you do not commit ``uv.lock`` yet,
+or if you intentionally want dependency updates during builds,
+you can drop ``--frozen``:
+
+.. code-block:: yaml
+   :caption: .readthedocs.yaml
+
+   version: 2
+
+   sphinx:
+     configuration: docs/conf.py
+
+   build:
+     os: "ubuntu-24.04"
+     tools:
+       python: "3.13"
+     jobs:
+       pre_create_environment:
+         - asdf plugin add uv
+         - asdf install uv 0.10.6
+         - asdf global uv 0.10.6
+       create_environment:
+         - uv venv "$READTHEDOCS_VIRTUALENV_PATH"
+       install:
+         - UV_PROJECT_ENVIRONMENT="$READTHEDOCS_VIRTUALENV_PATH" uv sync --group docs
+
+This is easier to adopt quickly,
+but it is less reproducible than using ``uv.lock`` with ``--frozen``.
+
+Alternative: use ``uv`` with ``requirements.txt``
+-------------------------------------------------
+
+If your project is not managed as a ``uv`` project,
+you can still use ``uv`` as an installer for existing requirements files:
+
+.. code-block:: yaml
+   :caption: .readthedocs.yaml
+
+   version: 2
+
+   sphinx:
+     configuration: docs/conf.py
+
+   build:
+     os: "ubuntu-24.04"
+     tools:
+       python: "3.13"
+     jobs:
+       pre_create_environment:
+         - asdf plugin add uv
+         - asdf install uv 0.10.6
+         - asdf global uv 0.10.6
+       create_environment:
+         - uv venv "$READTHEDOCS_VIRTUALENV_PATH"
+       install:
+         - uv pip install --python "$READTHEDOCS_VIRTUALENV_PATH/bin/python" -r docs/requirements.txt
+
+.. tip::
+
+    If your build imports your package itself,
+    install it in the same step with ``uv pip install --python "$READTHEDOCS_VIRTUALENV_PATH/bin/python" .``.
+
+Using ``uv`` with MkDocs
+------------------------
+
+The same ``uv`` installation patterns work with MkDocs.
+Only the tool-specific configuration changes:
+
+.. code-block:: yaml
+   :caption: .readthedocs.yaml
+
+   version: 2
+
+   mkdocs:
+     configuration: mkdocs.yml
+
+   build:
+     os: "ubuntu-24.04"
+     tools:
+       python: "3.13"
+     jobs:
+       pre_create_environment:
+         - asdf plugin add uv
+         - asdf install uv 0.10.6
+         - asdf global uv 0.10.6
+       create_environment:
+         - uv venv "$READTHEDOCS_VIRTUALENV_PATH"
+       install:
+         - UV_PROJECT_ENVIRONMENT="$READTHEDOCS_VIRTUALENV_PATH" uv sync --frozen --group docs
+
+Recommendations
+---------------
+
+* Pin ``build.os`` and ``build.tools.python`` in ``.readthedocs.yaml``.
+* Pin your ``uv`` version in ``asdf install uv 0.10.6``.
+* Prefer ``uv.lock`` and ``uv sync --frozen`` for reproducible builds.
+* Keep docs-only dependencies in a dedicated ``docs`` group.
+* Set ``UV_PROJECT_ENVIRONMENT`` inline on the command using ``uv sync``.
+
+.. seealso::
+
+   :doc:`/guides/reproducible-builds`
+      Recommendations for reproducible docs builds.
+   :doc:`/build-customization`
+      Learn more about the ``build.jobs`` customization model.
+   :doc:`/reference/environment-variables`
+      Reference for environment variables available in builds.