diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 6d96a4d..8ac1c82 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -54,8 +54,5 @@ repos:
     rev: "v1.2.0"
     hooks:
       - id: mypy
-        additional_dependencies: [
-          "git+https://github.com/python-cosmology/cosmology-api.git#egg=cosmology-api"
-        ]
         args:
           - --strict
diff --git a/docs/.gitignore b/docs/.gitignore
new file mode 100644
index 0000000..7bd1c9d
--- /dev/null
+++ b/docs/.gitignore
@@ -0,0 +1 @@
+api/reference
diff --git a/docs/Makefile b/docs/Makefile
new file mode 100644
index 0000000..d4bb2cb
--- /dev/null
+++ b/docs/Makefile
@@ -0,0 +1,20 @@
+# Minimal makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line, and also
+# from the environment for the first two.
+SPHINXOPTS    ?=
+SPHINXBUILD   ?= sphinx-build
+SOURCEDIR     = .
+BUILDDIR      = _build
+
+# Put it first so that "make" without argument is like "make help".
+help:
+	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+.PHONY: help Makefile
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
+%: Makefile
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
diff --git a/docs/_ext/sphinx_ext_autosummary_context.py b/docs/_ext/sphinx_ext_autosummary_context.py
new file mode 100644
index 0000000..611d111
--- /dev/null
+++ b/docs/_ext/sphinx_ext_autosummary_context.py
@@ -0,0 +1,51 @@
+"""Monkey-patching autosummary to emit the autosummary-gather-context event."""
+from inspect import signature
+from typing import TYPE_CHECKING
+
+from sphinx.errors import ExtensionError
+from sphinx.ext.autosummary.generate import (
+    generate_autosummary_content,
+    generate_autosummary_docs,
+)
+
+if TYPE_CHECKING:
+    from sphinx.application import Sphinx
+
+GENERATE_SIGNATURE = signature(generate_autosummary_content)
+
+
+def generate_autosummary_content_with_context(*args: object, **kwargs: object) -> str:
+    """Wrap generate_autosummary_content to emit autosummary-gather-context."""
+    ba = GENERATE_SIGNATURE.bind_partial(*args, **kwargs)
+    app = ba.arguments["app"]
+    if app:
+        name = ba.arguments["name"]
+        obj = ba.arguments["obj"]
+        parent = ba.arguments["parent"]
+        context = ba.arguments["context"]
+        results = app.emit("autosummary-gather-context", name, obj, parent, context)
+        for extra_context in results:
+            if extra_context:
+                context.update(extra_context)
+    return generate_autosummary_content(*args, **kwargs)  # type: ignore[arg-type]
+
+
+def setup(app: "Sphinx") -> None:
+    """Monkey-patch the autosummary-gather-context event if not present."""
+    # try connecting a mock callback to autosummary-gather-context
+    try:
+        listener_id = app.connect("autosummary-gather-context", lambda: None)
+    except ExtensionError:
+        listener_id = None
+
+    if listener_id is not None:
+        # event exists, all good
+        app.disconnect(listener_id)
+    else:
+        # patch generate_autosummary_docs to call the wrapper above
+        generate_autosummary_docs.__globals__[
+            "generate_autosummary_content"
+        ] = generate_autosummary_content_with_context
+
+        # register the new event
+        app.add_event("autosummary-gather-context")
diff --git a/docs/_ext/sphinx_ext_cosmology_api.py b/docs/_ext/sphinx_ext_cosmology_api.py
new file mode 100644
index 0000000..fbcef40
--- /dev/null
+++ b/docs/_ext/sphinx_ext_cosmology_api.py
@@ -0,0 +1,84 @@
+# ruff: noqa
+import sys
+from types import ModuleType
+from inspect import getmembers, getmro
+from sphinx.util.inspect import signature, stringify_signature
+
+# get_overloads is a Python 3.11 feature
+try:
+    from typing import get_overloads
+except ImportError:
+    get_overloads = None
+
+import cosmology
+import cosmology.api
+
+DOCS_MODULE_NAME = "cosmology.docs"
+
+
+class cosmo(cosmology.api.StandardCosmology):
+    """This is a mock cosmology class used for documenting all members
+    of the cosmology.api protocols.
+    """
+
+
+COSMOLOGY_BASES = [cls for cls in getmro(cosmo) if cls is not cosmo]
+
+
+def context_callback(app, name, obj, parent, context):
+    """Callback function to provide extra context for reference."""
+    # add protocols to context if obj is a method or property of Cosmology
+    extra_context = None
+    if parent is cosmo:
+        _, _, membername = name.rpartition(".")
+        protocols = [
+            f"{cls.__qualname__}.{membername}"
+            for cls in COSMOLOGY_BASES
+            if hasattr(cls, membername)
+        ]
+        extra_context = {"protocols": protocols}
+    return extra_context
+
+
+def signature_callback(app, what, name, obj, options, sig, return_annotation):
+    """Callback function to provide overloaded signatures."""
+    if what in ("function", "method") and callable(obj):
+        overloads = get_overloads(obj)
+        if overloads:
+            kwargs = {}
+            if app.config.autodoc_typehints in ("none", "description"):
+                kwargs["show_annotation"] = False
+            if app.config.autodoc_typehints_format == "short":
+                kwargs["unqualified_typehints"] = True
+            type_aliases = app.config.autodoc_type_aliases
+            bound_method = what == "method"
+            sigs = []
+            for overload in overloads:
+                overload_sig = signature(
+                    overload, bound_method=bound_method, type_aliases=type_aliases
+                )
+                sigs.append(stringify_signature(overload_sig, **kwargs))
+            return "\n".join(sigs), None
+
+
+def setup(app):
+    """Initialise the cosmology documentation extension."""
+    # create a mock `cosmology.docs` module containing `Cosmology`
+    docs_module = ModuleType(DOCS_MODULE_NAME)
+    docs_module.cosmo = cosmo
+    cosmo.__module__ = DOCS_MODULE_NAME
+    sys.modules[DOCS_MODULE_NAME] = docs_module
+
+    # change the autosummary_filename_map for all members of Cosmology
+    filename_map = {}
+    filename_prefix = f"{cosmo.__module__}.{cosmo.__name__}"
+    for name, _obj in getmembers(cosmo):
+        filename_map[f"{filename_prefix}.{name}"] = name
+    app.config.autosummary_filename_map.update(filename_map)
+
+    # register a callback for extra autosummary context
+    app.connect("autosummary-gather-context", context_callback)
+
+    # register a callback to show overloaded signatures
+    if get_overloads:
+        app.connect("autodoc-process-signature", signature_callback)
diff --git a/docs/_static/.gitignore b/docs/_static/.gitignore
new file mode 100644
index 0000000..e69de29
diff --git a/docs/_templates/autosummary/reference.rst b/docs/_templates/autosummary/reference.rst
new file mode 100644
index 0000000..881c952
--- /dev/null
+++ b/docs/_templates/autosummary/reference.rst
@@ -0,0 +1,20 @@
+{{ name | escape | underline }}
+
+{% if protocols -%}
+.. rubric:: Protocols
+
+.. currentmodule:: cosmology
+{% for protocol in protocols %}
+{% if loop.first %}.. {{ objtype }}:: {{ protocol }}
+{%- else %}{% for c in objtype %} {% endfor %}      {{ protocol }}
+{%- endif %}
+{%- endfor %}
+   :nocontentsentry:
+
+{% endif -%}
+
+.. rubric:: Reference
+
+.. currentmodule:: {{ module }}
+
+.. auto{{ objtype }}:: {{ objname }}
diff --git a/docs/changelog.rst b/docs/changelog.rst
new file mode 100644
index 0000000..b75ebae
--- /dev/null
+++ b/docs/changelog.rst
@@ -0,0 +1,6 @@
+
+Changelog
+=========
+
+.. include:: ../CHANGES.rst
+   :start-line: 2
diff --git a/docs/conf.py b/docs/conf.py
new file mode 100644
index 0000000..e795213
--- /dev/null
+++ b/docs/conf.py
@@ -0,0 +1,177 @@
+# ruff: noqa
+
+"""Configuration file for the Sphinx documentation builder.
+
+This file only contains a selection of the most common options. For a full
+list see the documentation:
+# https://www.sphinx-doc.org/en/master/usage/configuration.html
+"""
+
+
+import os
+import sys
+import tomli
+
+sys.path.append(os.path.abspath("../src"))
+
+
+# -- Project information -----------------------------------------------------
+
+
+def read_pyproject():
+    """Get author information from package metadata."""
+    with open(os.path.abspath("../pyproject.toml"), "rb") as f:
+        toml = tomli.load(f)
+
+    project = dict(toml["project"])
+    version = project["version"]
+    authors = ", ".join(d["name"] for d in project["authors"])
+
+    return version, authors
+
+
+package_version, package_authors = read_pyproject()
+
+project = "cosmology"
+author = package_authors
+copyright = f"2023, {author}"
+
+
+# The full version, including alpha/beta/rc tags.
+release = package_version
+# The short X.Y version.
+version = release.partition("-")[0]
+
+
+# -- General configuration ---------------------------------------------------
+
+sys.path.append(os.path.abspath("./_ext"))
+
+# By default, highlight as Python 3.
+highlight_language = "python3"
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
+# ones.
+extensions = [
+    "sphinx.ext.autosummary",
+    "sphinx.ext.doctest",
+    "sphinx.ext.intersphinx",
+    "numpydoc",
+    "sphinx_copybutton",
+    "sphinx_ext_autosummary_context",
+    "sphinx_ext_cosmology_api",
+]
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ["_templates"]
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+# This pattern also affects html_static_path and html_extra_path.
+exclude_patterns = ["_build", "Thumbs.db", ".DS_Store"]
+
+# This is added to the end of RST files - a good place to put substitutions to
+# be used globally.
+rst_epilog = """
+.. |author| replace:: {author}
+
+.. _Python: http://www.python.org
+"""
+
+intersphinx_mapping = {
+    "python": (
+        "https://docs.python.org/3/",
+        (None, "http://data.astropy.org/intersphinx/python3.inv"),
+    ),
+    "numpy": (
+        "https://numpy.org/doc/stable/",
+        (None, "http://data.astropy.org/intersphinx/numpy.inv"),
+    ),
+    "scipy": (
+        "https://docs.scipy.org/doc/scipy/reference/",
+        (None, "https://docs.scipy.org/doc/scipy/objects.inv"),
+    ),
+}
+
+
+# -- Options for HTML output -------------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+#
+html_theme = "furo"
+
+# The name for this set of Sphinx documents.  If None, it defaults to
+# "<project> v<release> documentation".
+html_title = f"{project} v{release}"
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+html_static_path = ["_static"]
+
+
+# -- autodoc extension -------------------------------------------------------
+
+# The default options for autodoc directives. They are applied to all autodoc
+# directives automatically. It must be a dictionary which maps option names to
+# the values.
+autodoc_default_options = {
+    "members": False,
+    "inherited-members": False,
+    "show-inheritance": True,
+}
+
+
+add_module_names = False
+
+# autodoc_class_signature = "separated"
+
+autosummary_generate = True
+
+
+# -- numpydoc extension ------------------------------------------------------
+
+# Whether to show all members of a class in the Methods and Attributes sections
+# automatically. True by default.
+numpydoc_show_class_members = True
+
+# Whether to show all inherited members of a class in the Methods and
+# Attributes sections automatically. If it's false, inherited members won't
+# shown. True by default.
+numpydoc_show_inherited_class_members = True
+
+# Whether to create a Sphinx table of contents for the lists of class methods
+# and attributes. If a table of contents is made, Sphinx expects each entry to
+# have a separate page. True by default.
+numpydoc_class_members_toctree = False
+
+# A regular expression matching citations which should be mangled to avoid
+# conflicts due to duplication across the documentation. Defaults to '[\w-]+'.
+# > numpydoc_citation_re = '[\w-]+'
+
+# Whether to format the Attributes section of a class page in the same way as
+# the Parameter section. If it's False, the Attributes section will be
+# formatted as the Methods section using an autosummary table. True by default.
+numpydoc_attributes_as_param_list = False
+
+# Whether to create cross-references for the parameter types in the
+# Parameters, Other Parameters, Returns and Yields sections of the docstring.
+numpydoc_xref_param_type = True
+
+# Words not to cross-reference. Most likely, these are common words used in
+# parameter type descriptions that may be confused for classes of the same
+# name. This can be overwritten or modified in packages and is provided here
+# for convenience.
+numpydoc_xref_ignore = {
+    "or",
+    "default",
+    "optional",
+    "positional-only",
+    "keyword-only",
+}
+
+# -- copybutton extension ------------------------------------------------------
+
+copybutton_exclude = ".linenos, .gp, .go"
diff --git a/docs/index.rst b/docs/index.rst
new file mode 100644
index 0000000..b2779fe
--- /dev/null
+++ b/docs/index.rst
@@ -0,0 +1,25 @@
+####################
+Cosmology for Python
+####################
+
+Check out the `API <https://cosmology.readthedocs.io/projects/api/>`_!
+
+
+.. toctree::
+   :caption: Usage
+   :hidden:
+
+   install
+
+
+.. toctree::
+   :caption: Other
+   :hidden:
+
+   changelog
+
+
+Contributors
+============
+
+.. include:: ../AUTHORS.rst
diff --git a/docs/install.rst b/docs/install.rst
new file mode 100644
index 0000000..4b4070f
--- /dev/null
+++ b/docs/install.rst
@@ -0,0 +1,35 @@
+.. _cosmology-install:
+
+************
+Installation
+************
+
+
+From Source: Cloning, Building, Installing
+==========================================
+
+The latest development version of :mod:`cosmology` can be cloned from `GitHub
+<https://github.com/cosmology-api/cosmology>`_ using ``git``
+
+.. code-block:: bash
+
+    git clone https://github.com/cosmology-api/cosmology.git
+
+To build and install the project (from the root of the source tree, e.g., inside
+the cloned :mod:`cosmology` directory)
+
+.. code-block:: bash
+
+    python -m pip install [-e] .
+
+
+Python Dependencies
+===================
+
+This package has the following dependencies:
+
+* `Python`_ >= 3.9
+
+Explicit version requirements are specified in the project `pyproject.toml
+<https://github.com/cosmology-api/cosmology/blob/main/pyproject.toml>`_.
+``pip`` and ``conda`` should install and enforce these versions automatically.
diff --git a/docs/make.bat b/docs/make.bat
new file mode 100644
index 0000000..32bb245
--- /dev/null
+++ b/docs/make.bat
@@ -0,0 +1,35 @@
+@ECHO OFF
+
+pushd %~dp0
+
+REM Command file for Sphinx documentation
+
+if "%SPHINXBUILD%" == "" (
+	set SPHINXBUILD=sphinx-build
+)
+set SOURCEDIR=.
+set BUILDDIR=_build
+
+%SPHINXBUILD% >NUL 2>NUL
+if errorlevel 9009 (
+	echo.
+	echo.The 'sphinx-build' command was not found. Make sure you have Sphinx
+	echo.installed, then set the SPHINXBUILD environment variable to point
+	echo.to the full path of the 'sphinx-build' executable. Alternatively you
+	echo.may add the Sphinx directory to PATH.
+	echo.
+	echo.If you don't have Sphinx installed, grab it from
+	echo.https://www.sphinx-doc.org/
+	exit /b 1
+)
+
+if "%1" == "" goto help
+
+%SPHINXBUILD% -M %1 %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
+goto end
+
+:help
+%SPHINXBUILD% -M help %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
+
+:end
+popd
diff --git a/pyproject.toml b/pyproject.toml
index a8194cc..67b3000 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [project]
-  name = "cosmology.core"
+  name = "cosmology"
   version = "0.1.0"
-  description = "Cosmology API standard compatability library"
+  description = "Cosmology Library"
   readme = "README.rst"
   requires-python = ">=3.9"
   license = {file = "LICENSE"}
@@ -22,34 +22,32 @@
     "Programming Language :: Python :: 3",
   ]
   dependencies = [
-    "cosmology.api @ git+https://github.com/python-cosmology/cosmology-api.git",
+    "cosmology.api >= 0.1.0",
   ]
 
 [project.optional-dependencies]
-  all = [
-  ]
   test = [
     "coverage[toml]",
-    "numpy>=1.18",
+    "numpy>=1.20",
     "pytest",
-    "pytest-astropy",
+    "pytest-cov",
+    "sybil",
+    "typing_extensions",
   ]
   docs = [
-    "graphviz",
-    "IPython",
-    "jupyter_client",
-    "nbsphinx",
-    "pydata-sphinx-theme",
+    "furo",
+    "numpydoc",
     "sphinx",
-    "sphinx-astropy",
-    "sphinxcontrib.bibtex < 3.0.0",
-    "tomlkit",
+    "sphinx-copybutton",
+    "sybil",
+    "tomli",
+    "typing_extensions",
   ]
 
 [project.urls]
-  homepage = "https://cosmology.readthedocs.org/core"
-  repository = "https://github.com/cosmology-api/cosmology"
-  documentation = "https://cosmology.readthedocs.org/core"
+  homepage = "https://cosmology.readthedocs.org"
+  repository = "https://github.com/cosmology-api/cosmolog"
+  documentation = "https://cosmology.readthedocs.org"
 
 
 [build-system]
@@ -93,9 +91,11 @@
   ]
 
 [tool.mypy]
+  python_version = 3.9
+
   namespace_packages = true
   explicit_package_bases = true
-  python_version = 3.9
+  mypy_path = "$MYPY_CONFIG_FILE_DIR/src"
 
   strict = true
   disallow_subclassing_any = false
@@ -105,14 +105,20 @@
   warn_redundant_casts = true
   warn_unused_configs = true
   warn_unreachable = true
-  exclude = '''(^|/)tests/'''
+  exclude = '''(^|/)tests/|(^/)docs/|(^/)conftest\.py'''
 
   [[tool.mypy.overrides]]
-    module = "tests/*"
+    module = [
+      "tests/*",
+      "docs/*",
+    ]
     ignore_errors = true
 
   [[tool.mypy.overrides]]
-    module="cosmology.api.*"
+    module = [
+      "tomli.*",
+      "sybil.*",
+    ]
     ignore_missing_imports = true
 
 
@@ -122,13 +128,26 @@ line-length = 88
 
 select = ["ALL"]
 ignore = [
-  "ANN101", "ANN102", "ANN401",
-  "ARG001", "ARG002",
-  "D105", "D107", "D203", "D213",
-  "FBT003",
-  "PD",
+  "ANN101",  # Missing type annotation for {name} in method  # TODO: report to Ruff
+  "ANN102",
+  "ANN401",
+  "ARG001",  # Unused function argument
+  "ARG002",  # Unused method argument
+  "COM812",  # trailing-comma-missing
+  "D105",  # Missing docstring in magic method
+  "D107",  # Missing docstring in __init__
+  "D203",  # 1 blank line required before class docstring
+  "D213",  # Multi-line docstring summary should start at the second line
+  "FBT003",  # Boolean positional value in function call
+  "PD",  # pandas-vet
   "RET505", "RET506", "RET507",
 ]
 
 [tool.ruff.per-file-ignores]
+"docs/*.py" = ["INP001"]
+"tests/*.py" = [
+  "ANN",
+  "PLR0913",  # Too many arguments to function call
+  "TID252",
+]
 "test_*.py" = ["ANN", "D", "S101"]