diff --git a/.rubocop.yml b/.rubocop.yml
index 50cacdf..8ac116c 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,6 +1,3 @@
-AllCops:
-  DisplayCopNames: true
-
 Metrics/LineLength:
   Max: 120
 
diff --git a/Changelog.md b/Changelog.md
new file mode 100644
index 0000000..b38bdba
--- /dev/null
+++ b/Changelog.md
@@ -0,0 +1,9 @@
+# Changelog
+
+## Current master branch
+
+- Nothing yet!
+
+## 0.1.0
+
+- Initial release of Aeryn.
diff --git a/Dangerfile b/Dangerfile
new file mode 100644
index 0000000..c264ab7
--- /dev/null
+++ b/Dangerfile
@@ -0,0 +1,45 @@
+has_app_changes = !git.modified_files.grep(/lib/).empty?
+has_test_changes = !git.modified_files.grep(/spec/).empty?
+
+# Sometimes it's a README fix, or something like that - which isn't relevant for
+# including in a project's CHANGELOG for example
+declared_trivial = pr_title.include? '#trivial'
+
+# Make it more obvious that a PR is a work in progress and shouldn't be merged yet
+warn('PR is classed as Work in Progress') if pr_title.include? '[WIP]'
+
+# Warn when there is a big PR
+warn('Big PR') if lines_of_code > 500
+
+# Add a CHANGELOG entry for app changes
+if !modified_files.include?('CHANGELOG.md') && has_app_changes
+  fail('Please include a CHANGELOG entry.')
+end
+
+# Warn about un-updated tests
+if has_app_changes && !has_test_changes
+  warn 'Tests were not updated'
+end
+
+if github.pr_body.length < 5
+  fail 'Please provide a summary in the Pull Request description'
+end
+
+# TODO: This could be a danger plugin
+files_to_lint = (modified_files + added_files).select { |f| f.end_with? 'rb' }
+rubocop_results = files_to_lint.map { |f| JSON.parse(`bundle exec rubocop -f json #{f}`)['files'] }.flatten
+offending_files = rubocop_results.select { |f| f['offenses'].count > 0 }
+
+unless offending_files.empty?
+  message = '### Rubocop violations'
+  message << 'File | Line | Reason |\n'
+  message << '| --- | ----- | ----- |\n'  
+
+  offending_files.each do |f|
+    f['offenses'].each do |o|
+      message << "#{f['path']} | #{o['location']['line']} | #{o['message']} \n"
+    end
+  end
+
+  markdown message
+end
diff --git a/Gemfile b/Gemfile
index d26716a..91e6052 100644
--- a/Gemfile
+++ b/Gemfile
@@ -18,4 +18,6 @@ group :test do
   gem 'guard-rspec'
   gem 'capybara'
   gem 'rspec-mocks'
+
+  gem 'danger'
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index 817809d..57c35d4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -9,13 +9,27 @@ GEM
       rack (>= 1.0.0)
       rack-test (>= 0.5.4)
       xpath (~> 2.0)
+    claide (1.0.0)
     coderay (1.1.1)
+    colored (1.2)
+    cork (0.1.0)
+      colored (~> 1.2)
+    danger (0.8.4)
+      claide (~> 1.0)
+      colored (~> 1.2)
+      cork (~> 0.1)
+      faraday (~> 0)
+      git (~> 1)
+      octokit (~> 4.2)
+      redcarpet (~> 3.3)
+      terminal-table (~> 1)
     diff-lcs (1.2.5)
     extlib (0.9.16)
     faraday (0.9.2)
       multipart-post (>= 1.2, < 3)
     ffi (1.9.10)
     formatador (0.2.5)
+    git (1.3.0)
     guard (2.14.0)
       formatador (>= 0.2.4)
       listen (>= 2.7, < 4.0)
@@ -70,6 +84,7 @@ GEM
     rb-fsevent (0.9.7)
     rb-inotify (0.9.7)
       ffi (>= 0.5.0)
+    redcarpet (3.3.4)
     rspec (3.5.0)
       rspec-core (~> 3.5.0)
       rspec-expectations (~> 3.5.0)
@@ -106,6 +121,7 @@ GEM
       diff-lcs (>= 1.1.2)
       extlib (>= 0.9.5)
       highline (>= 1.4.0)
+    terminal-table (1.6.0)
     thor (0.19.1)
     tilt (2.0.5)
     unicode-display_width (1.1.0)
@@ -117,6 +133,7 @@ PLATFORMS
 
 DEPENDENCIES
   capybara
+  danger
   guard-rspec
   guard-rubocop
   json
diff --git a/circle.yml b/circle.yml
new file mode 100644
index 0000000..a450b5b
--- /dev/null
+++ b/circle.yml
@@ -0,0 +1,4 @@
+test:
+  override:
+    - bundle exec rspec
+    - bundle exec danger