diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6d0e8068..4079dca0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## v0.13.0
+
+- Refactor build logic out into standalone library: https://github.com/Polymer/polymer-build
+- Refactor build file optimization streams
+- Send an error code on polymer command run error
+
+
 ## v0.12.0
 
 - gulp-typings@2.0.0
diff --git a/README.md b/README.md
index e8940fab..a6c5709a 100644
--- a/README.md
+++ b/README.md
@@ -130,9 +130,10 @@ Use `index.html` as the entryopint, or read from `polymer.json`:
 
     $ polymer build
 
-`build` is opinionated and defaults to a good build for app-shell apps. It works very much like a pre-configured gulpfile. Over time the build steps that Polymer-CLI uses will be available for use with Gulp, and the CLI will add hooks that let you extend it's functionality via Gulp.
+`build` is opinionated and defaults to a good build for app-shell apps. It writes the built output to `build/bundled` and `build/unbundled` folders. Both outputs have been run though HTML, JS and CSS optimizers, and have a Service Worked generated for them. The bundled folder contains the application files process by Vulcanize, Polymer's HTML bundler, for optimal loading via HTTP/1. The unbundled folder is optimized for HTTP/2 + Push.
+
+While the build command should support most projects, some users will need greater control over their build pipeline. If that's you, check out the [polymer-build](https://github.com/Polymer/polymer-build) library. Polymer-build can be called and customized programatically, giving you much greater control than the CLI can provide. Visit the repo for usage information and examples.
 
-`build` writes the built output to `build/bundled` and `build/unbundled` folders. Both outputs have been run though HTML, JS and CSS optimizers, and have a Service Worked generated for them. The bundled folder contains the application files process by Vulcanize, Polymer's HTML bundler, for optimal loading via HTTP/1. The unbundled folder is optimized for HTTP/2 + Push.
 
 ### serve
 
diff --git a/package.json b/package.json
index a7f1e19e..fa54f21e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "polymer-cli",
-  "version": "0.12.0",
+  "version": "0.13.0",
   "description": "A commandline tool for Polymer projects",
   "main": "lib/polymer-cli.js",
   "engines": {