diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..0cb6eeb
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,9 @@
+/.bundle/
+/.yardoc
+/Gemfile.lock
+/_yardoc/
+/coverage/
+/doc/
+/pkg/
+/spec/reports/
+/tmp/
diff --git a/.overcommit.yml b/.overcommit.yml
new file mode 100644
index 0000000..017f51e
--- /dev/null
+++ b/.overcommit.yml
@@ -0,0 +1,13 @@
+PreCommit:
+  RuboCop:
+    enabled: true
+    required: false
+    on_warn: fail
+
+  HardTabs:
+    enabled: true
+    required: false
+
+CommitMsg:
+  TrailingPeriod:
+    enabled: false
diff --git a/.rspec b/.rspec
new file mode 100644
index 0000000..34c5164
--- /dev/null
+++ b/.rspec
@@ -0,0 +1,3 @@
+--format documentation
+--color
+--require spec_helper
diff --git a/.rubocop.yml b/.rubocop.yml
new file mode 100644
index 0000000..3c02b4e
--- /dev/null
+++ b/.rubocop.yml
@@ -0,0 +1,11 @@
+inherit_gem:
+  salsify_rubocop: conf/rubocop.yml
+
+AllCops:
+  TargetRubyVersion: 2.4
+  Exclude:
+  - 'vendor/**/*'
+  - 'gemfiles/vendor/**/*'
+
+Style/FrozenStringLiteralComment:
+  Enabled: true
diff --git a/.ruby-gemset b/.ruby-gemset
new file mode 100644
index 0000000..a797def
--- /dev/null
+++ b/.ruby-gemset
@@ -0,0 +1 @@
+tree_reject
diff --git a/.ruby-version b/.ruby-version
new file mode 100644
index 0000000..d4bcea9
--- /dev/null
+++ b/.ruby-version
@@ -0,0 +1 @@
+ruby-2.5.3
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..af584ce
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,7 @@
+language: ruby
+rvm:
+  - 2.5.3
+before_install: gem install bundler -v 1.12.4
+script:
+  - bundle exec rubocop
+  - bundle exec rspec
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..1b7a132
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,11 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
+
+## Unreleased
+
+## 0.1.0 - 2019-03-28
+### Added
+- Initial version
diff --git a/Gemfile b/Gemfile
new file mode 100644
index 0000000..4e0b390
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+
+source 'https://rubygems.org'
+
+
+# override the :github shortcut to be secure by using HTTPS
+git_source(:github) { |repo_name| "https://github.com/#{repo_name}.git" }
+
+# Specify your gem's dependencies in tree_reject.gemspec
+gemspec
diff --git a/LICENSE.txt b/LICENSE.txt
new file mode 100644
index 0000000..29006ee
--- /dev/null
+++ b/LICENSE.txt
@@ -0,0 +1,22 @@
+The MIT License (MIT)
+
+Copyright (c) 2019 Salsify, Inc
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..257cd3b
--- /dev/null
+++ b/README.md
@@ -0,0 +1,51 @@
+# TreeReject
+
+Welcome to your new gem! In this directory, you'll find the files you need to be
+able to package up your Ruby library into a gem. Put your Ruby code in the file
+`lib/tree_reject`. To experiment with that code, run 
+`bin/console` for an interactive prompt.
+
+TODO: Delete this and the text above, and describe your gem
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+```ruby
+gem 'tree_reject'
+```
+
+And then execute:
+
+    $ bundle
+
+Or install it yourself as:
+
+    $ gem install tree_reject
+
+## Usage
+
+TODO: Write usage instructions here
+
+## Development
+
+After checking out the repo, run `bin/setup` to install dependencies. Then,
+run `rake spec` to run the tests. You can also run `bin/console` for an
+interactive prompt that will allow you to experiment.
+
+To install this gem onto your local machine, run `bundle exec rake install`. 
+
+To release a new version, update the version number in `version.rb`, and then
+run `bundle exec rake release`, which will create a git tag for the version,
+push git commits and tags, and push the `.gem` file to
+[rubygems.org](https://rubygems.org)
+.
+
+## Contributing
+
+Bug reports and pull requests are welcome on GitHub at
+https://github.com/salsify/tree_reject.## License
+
+The gem is available as open source under the terms of the
+[MIT License](http://opensource.org/licenses/MIT).
+
diff --git a/Rakefile b/Rakefile
new file mode 100644
index 0000000..c2094f3
--- /dev/null
+++ b/Rakefile
@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+require 'bundler/gem_tasks'
+
+
+require 'rspec/core/rake_task'
+
+RSpec::Core::RakeTask.new(:spec)
+
+task default: :spec
diff --git a/bin/console b/bin/console
new file mode 100755
index 0000000..90f19ef
--- /dev/null
+++ b/bin/console
@@ -0,0 +1,15 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+require 'bundler/setup'
+require 'tree_reject'
+
+# You can add fixtures and/or initialization code here to make experimenting
+# with your gem easier. You can also use a different console, if you like.
+
+# (If you use this, don't forget to add pry to your Gemfile!)
+# require "pry"
+# Pry.start
+
+require 'irb'
+IRB.start
diff --git a/bin/setup b/bin/setup
new file mode 100755
index 0000000..d59b32d
--- /dev/null
+++ b/bin/setup
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+set -euo pipefail
+IFS=$'\n\t'
+set -v
+
+bundle update
+
+overcommit --install
diff --git a/lib/tree_reject.rb b/lib/tree_reject.rb
new file mode 100644
index 0000000..7690603
--- /dev/null
+++ b/lib/tree_reject.rb
@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+require 'tree_reject/version'
+
+# Top-level gem module
+module TreeReject
+end
diff --git a/lib/tree_reject/version.rb b/lib/tree_reject/version.rb
new file mode 100644
index 0000000..baf0cbc
--- /dev/null
+++ b/lib/tree_reject/version.rb
@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+module TreeReject
+  VERSION = '0.1.0'
+end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
new file mode 100644
index 0000000..f0a8882
--- /dev/null
+++ b/spec/spec_helper.rb
@@ -0,0 +1,4 @@
+# frozen_string_literal: true
+
+$LOAD_PATH.unshift File.expand_path('../lib', __dir__)
+require 'tree_reject'
diff --git a/spec/tree_reject_spec.rb b/spec/tree_reject_spec.rb
new file mode 100644
index 0000000..529c2c7
--- /dev/null
+++ b/spec/tree_reject_spec.rb
@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+describe TreeReject do
+  it "has a version number" do
+    expect(TreeReject::VERSION).not_to be nil
+  end
+end
diff --git a/tree_reject.gemspec b/tree_reject.gemspec
new file mode 100644
index 0000000..821a668
--- /dev/null
+++ b/tree_reject.gemspec
@@ -0,0 +1,42 @@
+# frozen_string_literal: true
+
+lib = File.expand_path('lib', __dir__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require 'tree_reject/version'
+
+Gem::Specification.new do |spec|
+  spec.name          = 'tree_reject'
+  spec.version       = TreeReject::VERSION
+  spec.authors       = ['Salsify, Inc']
+  spec.email         = ['engineering@salsify.com']
+
+  spec.summary       = 'Remove deeply nested keys from hash.'
+  spec.description   = spec.summary
+  spec.homepage      = 'https://github.com/salsify/tree_reject'
+
+  spec.license       = 'MIT'
+
+
+  # Set 'allowed_push_post' to control where this gem can be published.
+  if spec.respond_to?(:metadata)
+    spec.metadata['allowed_push_host'] = 'https://rubygems.org'
+
+  else
+    raise 'RubyGems 2.0 or newer is required to protect against public gem pushes.'
+  end
+
+  spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
+  spec.bindir        = 'bin'
+  spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
+  spec.require_paths = ['lib']
+
+  spec.required_ruby_version = '>= 2.4'
+
+  spec.add_development_dependency 'bundler', '~> 1.12'
+  spec.add_development_dependency 'overcommit'
+  spec.add_development_dependency 'rake', '~> 10.0'
+  spec.add_development_dependency 'rspec', '~> 3.4'
+
+  spec.add_development_dependency 'salsify_rubocop', '~> 0.60.0'
+
+end