diff --git a/Documentation/developer-guide.md b/Documentation/developer-guide.md
new file mode 100644
index 0000000..2d4af0f
--- /dev/null
+++ b/Documentation/developer-guide.md
@@ -0,0 +1,108 @@
+# Developer Guide
+
+[TOC]
+
+## Building
+
+Gitiles requires [Buck](http://facebook.github.io/buck/) to build.
+
+```
+sudo apt-get install ant
+cd ${HOME}
+git clone https://github.com/facebook/buck.git
+cd buck
+ant
+sudo ln -s ${PWD}/bin/buck /usr/bin/buck
+cd /path/to/gitiles
+git submodule update --init
+buck build all
+buck test
+```
+
+
+## Testing
+
+```
+cd /path/to/repositories  # Don't run from the gitiles repo.
+/path/to/gitiles/tools/run_dev.sh
+```
+
+This will recompile and start a development server.  Open
+http://localhost:8080/ to view your local copy of gitiles, which
+will serve any repositories under `/path/to/repositories`.
+
+To run unit tests, run `buck test`.
+
+
+## Eclipse IDE
+
+If you'd like to use Eclipse to edit Gitiles, first generate a project file:
+
+```
+./bucklets/tools/eclipse.py --src
+```
+
+Import the project in Eclipse:
+
+```
+File -> Import -> Existing Projects into Workpace
+```
+
+The project only needs to be rebuilt if the source roots or third-party
+libraries have changed. For best results, ensure the project is closed in
+Eclipse before rebuilding.
+
+
+## Code Style
+
+Java code in Gitiles follows the [Google Java Style Guide][java-style]
+with a 100-column limit.
+
+Code should be automatically formatted using [google-java-format][fmt]
+prior to sending a code review.  There is currently no Eclipse
+formatter, but the tool can be run from the command line:
+
+```
+java -jar /path/to/google-java-format-1.0-all-deps.jar -i path/to/java/File.java
+```
+
+CSS in Gitiles follows the [SUIT CSS naming conventions][suit].
+
+[java-style]: https://google.github.io/styleguide/javaguide.html
+[fmt]: https://github.com/google/google-java-format
+[suit]: https://github.com/suitcss/suit/blob/master/doc/naming-conventions.md
+
+## Code Review
+
+Gitiles uses Gerrit for code review:
+https://gerrit-review.googlesource.com/
+
+Gitiles uses the ["git push" workflow][1] with server
+https://gerrit.googlesource.com/gitiles.  You will need a
+[generated cookie][2].
+
+[1]: https://gerrit-review.googlesource.com/Documentation/user-upload.html#_git_push
+[2]: https://gerrit.googlesource.com/new-password
+
+Gerrit depends on "Change-Id" annotations in your commit message.
+If you try to push a commit without one, it will explain how to
+install the proper git-hook:
+
+```
+curl -Lo `git rev-parse --git-dir`/hooks/commit-msg \
+    https://gerrit-review.googlesource.com/tools/hooks/commit-msg
+chmod +x `git rev-parse --git-dir`/hooks/commit-msg
+```
+
+Before you create your local commit (which you'll push to Gerrit)
+you will need to set your email to match your Gerrit account:
+
+```
+git config --local --add user.email foo@bar.com
+```
+
+Normally you will create code reviews by pushing for master:
+
+```
+git push origin HEAD:refs/for/master
+```
diff --git a/README.md b/README.md
index eab9489..695d3a1 100644
--- a/README.md
+++ b/README.md
@@ -4,107 +4,6 @@
 guiding principle is simplicity: it has no formal access controls, no write
 access, no fancy Javascript, etc.
 
-## Building
+## Contributing to Gitiles
 
-Gitiles requires [Buck](http://facebook.github.io/buck/) to build.
-
-```
-sudo apt-get install ant
-cd ${HOME}
-git clone https://github.com/facebook/buck.git
-cd buck
-ant
-sudo ln -s ${PWD}/bin/buck /usr/bin/buck
-cd /path/to/gitiles
-git submodule update --init
-buck build all
-buck test
-```
-
-
-## Testing
-
-```
-cd /path/to/repositories  # Don't run from the gitiles repo.
-/path/to/gitiles/tools/run_dev.sh
-```
-
-This will recompile and start a development server.  Open
-http://localhost:8080/ to view your local copy of gitiles, which
-will serve any repositories under `/path/to/repositories`.
-
-To run unit tests, run `buck test`.
-
-
-## Eclipse IDE
-
-If you'd like to use Eclipse to edit Gitiles, first generate a project file:
-
-```
-./bucklets/tools/eclipse.py --src
-```
-
-Import the project in Eclipse:
-
-```
-File -> Import -> Existing Projects into Workpace
-```
-
-The project only needs to be rebuilt if the source roots or third-party
-libraries have changed. For best results, ensure the project is closed in
-Eclipse before rebuilding.
-
-
-## Code Style
-
-Java code in Gitiles follows the [Google Java Style Guide][java-style]
-with a 100-column limit.
-
-Code should be automatically formatted using [google-java-format][fmt]
-prior to sending a code review.  There is currently no Eclipse
-formatter, but the tool can be run from the command line:
-
-```
-java -jar /path/to/google-java-format-1.0-all-deps.jar -i path/to/java/File.java
-```
-
-CSS in Gitiles follows the [SUIT CSS naming conventions][suit].
-
-[java-style]: https://google.github.io/styleguide/javaguide.html
-[fmt]: https://github.com/google/google-java-format
-[suit]: https://github.com/suitcss/suit/blob/master/doc/naming-conventions.md
-
-## Code Review
-
-Gitiles uses Gerrit for code review:
-https://gerrit-review.googlesource.com/
-
-Gitiles uses the ["git push" workflow][1] with server
-https://gerrit.googlesource.com/gitiles.  You will need a
-[generated cookie][2].
-
-[1]: https://gerrit-review.googlesource.com/Documentation/user-upload.html#_git_push
-[2]: https://gerrit.googlesource.com/new-password
-
-Gerrit depends on "Change-Id" annotations in your commit message.
-If you try to push a commit without one, it will explain how to
-install the proper git-hook:
-
-```
-curl -Lo `git rev-parse --git-dir`/hooks/commit-msg \
-    https://gerrit-review.googlesource.com/tools/hooks/commit-msg
-chmod +x `git rev-parse --git-dir`/hooks/commit-msg
-```
-
-Before you create your local commit (which you'll push to Gerrit)
-you will need to set your email to match your Gerrit account:
-
-```
-git config --local --add user.email foo@bar.com
-```
-
-Normally you will create code reviews by pushing for master:
-
-```
-git push origin HEAD:refs/for/master
-```
+Please refer to the [Developer Guide](/Documentation/developer-guide.md).