diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
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+# How to contribute
+
+We'd love to accept your patches and contributions to this project. There are
+just a few small guidelines you need to follow.
+
+## Contributor License Agreement
+
+Contributions to this project must be accompanied by a Contributor License
+Agreement (CLA). You (or your employer) retain the copyright to your
+contribution; this simply gives us permission to use and redistribute your
+contributions as part of the project. Head over to
+<https://cla.developers.google.com/> to see your current agreements on file or
+to sign a new one.
+
+You generally only need to submit a CLA once, so if you've already submitted one
+(even if it was for a different project), you probably don't need to do it
+again.
+
+## Checking out source
+
+### Set up git
+
+If you haven't already, configure your git user email and name:
+
+```shell
+$ git config --global user.email "<your-email>@example.com"
+$ git config --global user.name "Your Name"
+```
+
+### Checkout
+
+With your git configured, you can now checkout the source with:
+
+```shell
+$ git clone https://cos.googlesource.com/cos/tools && (cd tools && f=`git rev-parse --git-dir`/hooks/commit-msg ; mkdir -p $(dirname $f) ; curl -Lo $f https://gerrit-review.googlesource.com/tools/hooks/commit-msg ; chmod +x $f)
+```
+
+The last command not only clones the repository but also adds a git pre-commit
+hook that will be explained below in "Making changes".
+
+## Making changes
+
+The typical git workflow applies here. You can use `git checkout -b` to create a
+branch and `git commit` to commit local changes. The pre-commit hook that was
+downloaded earlier will insert a Gerrit (Gerrit is explained below) Change-Id
+into every local commit you make. This Change-Id is specific to Gerrit and
+defines a change: one change and the corresponding review in Gerrit will have
+one Change-Id. If a Change-Id is not provided in the commit message, Gerrit will
+reject the commit. While you can manually add a Change-Id later, it's strongly
+recommended you include it from the start, when you clone the repository.
+
+## Code reviews
+
+All submissions, including submissions by project members, require review. We
+use [Gerrit](https://gerrit-review.googlesource.com/Documentation/) for this
+purpose.
+
+### Register with Gerrit
+
+Before you can request code reviews, you need to register with Gerrit first. You
+can do that by going to <https://cos-review.googlesource.com> and clicking "Sign
+in" at the top right corner.
+
+### Upload a CL
+
+```shell
+$ git push origin HEAD:refs/for/master
+```
+
+The command will print a URL to the CL that has just been uploaded. You can
+follow the URL to the Gerrit UI and add reviewers from there.
+
+## Community guidelines
+
+This project follows
+[Google's Open Source Community Guidelines](https://opensource.google/conduct/).
diff --git a/LICENSE b/LICENSE
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+++ b/LICENSE
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+Copyright 2020 Google LLC
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    https://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
diff --git a/README.md b/README.md
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+# Tools for Container-Optimized OS
+
+This is a repository of various tools developed for [Container-Optimized
+OS](https://cloud.google.com/container-optimized-os/). Examples include
+cos-gpu-installer, cos-toolbox, etc.
+
+See CONTRIBUTING.md for how to contribute.