Simple README.md for the git-cookie-authdaemon
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+# Git authentication tools for Google Compute Engine
+
+The `git-cookie-authdaemon` uses the GCE metadata server to acquire an
+OAuth2 access token and configures `git` to always present this OAuth2
+token when connecting to googlesource.com or
+[Google Cloud Source Repositories][CSR].
+
+[CSR]: https://cloud.google.com/source-repositories/
+
+## Setup
+
+Launch the GCE VMs with the gerritcodereview scope requested, for example:
+
+```
+gcloud compute instances create \
+ --scopes https://www.googleapis.com/auth/gerritcodereview \
+ ...
+```
+
+## Installation
+
+Install the daemon within the VM image and start it running:
+
+```
+sudo apt-get install git
+git clone https://gerrit.googlesource.com/gcompute-tools/
+./gcompute-tools/git-cookie-authdaemon
+```
+
+The daemon launches itself into the background and continues
+to keep the OAuth2 access token fresh.
