diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 5826baf..164757f 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -66,8 +66,9 @@ Some guidelines on contributing to IPython:
   If you're making functional changes, you can clean up the specific pieces of
   code you're working on.
 
-[Travis](http://travis-ci.org/#!/ipython/ipython) does a pretty good job testing
-IPython and Pull Requests, but it may make sense to manually perform tests,
+[GitHub Actions](https://github.com/ipython/ipython/actions/workflows/test.yml) does
+a pretty good job testing IPython and Pull Requests,
+but it may make sense to manually perform tests,
 particularly for PRs that affect `IPython.parallel` or Windows.
 
 For more detailed information, see our [GitHub Workflow](https://github.com/ipython/ipython/wiki/Dev:-GitHub-workflow).
@@ -88,3 +89,30 @@ Only a single test (for example **test_alias_lifecycle**) within a single file c
 ```shell
 pytest IPython/core/tests/test_alias.py::test_alias_lifecycle
 ```
+
+## Code style
+
+* Before committing, run `darker -r 60625f241f298b5039cb2debc365db38aa7bb522 <file path>` to apply selective `black` formatting on modified regions using [darker](https://github.com/akaihola/darker).
+* For newly added modules or refactors, please enable static typing analysis with `mypy` for the modified module by adding the file path in [`mypy.yml`](https://github.com/ipython/ipython/blob/main/.github/workflows/mypy.yml) workflow.
+* As described in the pull requests section, please avoid excessive formatting changes; if a formatting-only commit is necessary, consider adding its hash to [`.git-blame-ignore-revs`](https://github.com/ipython/ipython/blob/main/.git-blame-ignore-revs) file.
+
+## Documentation
+
+Sphinx documentation can be built locally using standard sphinx `make` commands. To build HTML documentation from the root of the project, execute:
+
+```shell
+pip install -r docs/requirements.txt   # only needed once
+make -C docs/ html SPHINXOPTS="-W"
+```
+
+To force update of the API documentation, precede the `make` command with:
+
+```shell
+python3 docs/autogen_api.py
+```
+
+Similarly, to force-update the configuration, run:
+
+```shell
+python3 docs/autogen_config.py
+```
diff --git a/README.rst b/README.rst
index 0371848..b004792 100644
--- a/README.rst
+++ b/README.rst
@@ -5,7 +5,7 @@
     :target: https://pypi.python.org/pypi/ipython
 
 .. image:: https://github.com/ipython/ipython/actions/workflows/test.yml/badge.svg
-    :target: https://github.com/ipython/ipython/actions/workflows/test.yml)
+    :target: https://github.com/ipython/ipython/actions/workflows/test.yml
 
 .. image:: https://www.codetriage.com/ipython/ipython/badges/users.svg
     :target: https://www.codetriage.com/ipython/ipython/
diff --git a/tools/release_helper.sh b/tools/release_helper.sh
index 697ed85..d221f55 100644
--- a/tools/release_helper.sh
+++ b/tools/release_helper.sh
@@ -8,6 +8,7 @@ python -c 'import twine'
 python -c 'import sphinx'
 python -c 'import sphinx_rtd_theme'
 python -c 'import pytest'
+python -c 'import build'
 
 
 BLACK=$(tput setaf 1)