diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 0000000..29a6773
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,175 @@
+version: 2
+
+# TODO: centralize full configuration. Figure out how
+#   ?? Each step as a separate script that is downloaded and run ??
+#   ?? CircleCI feature request to supoort include from remote sources
+# More Markdown terraform_testing
+# Python testing. Add doc and test that too
+# circleci/python: Both 2 and 3?
+# if src/requirements.txt get version from *.tf and test
+#   Style+: flake8 + hacking?, prospector?
+#   Security: bandit, RATS,
+
+# This file uses YAML anchors to deduplicate steps
+# see https://circleci.com/blog/circleci-hacks-reuse-yaml-in-your-circleci-config-with-yaml/
+# and https://learnxinyminutes.com/docs/yaml/
+
+.steps_template: &steps_terraform_static_analysis
+  steps:
+    - checkout
+    - run:
+        name: "Check: Validate tf files (terraform validate)"
+        command: |
+            find . -type f -name "*.tf" -exec dirname {} \;|sort -u | while read m; do (terraform validate -check-variables=false "$m" && echo "√ $m") || exit 1 ; done
+    - run:
+        name: "Check: Terraform formatting (terraform fmt)"
+        command: |
+            if [ `terraform fmt --list=true -diff=true -write=false | tee format-issues | wc -c` -ne 0 ]; then
+              echo "Some terraform files need be formatted, run 'terraform fmt' to fix"
+              echo "Formatting issues:"
+              cat format-issues
+              exit 1
+            fi
+    - run:
+        name: "Install: tflint"
+        command: |
+            apk update
+            apk add jq wget
+            # Get latest version of tflint (v0.7.0 test if still need to exclude modules. Any other changes)
+            pkg_arch=linux_amd64
+            dl_url=$(curl -s https://api.github.com/repos/wata727/tflint/releases/latest | jq -r ".assets[] | select(.name | test(\"${pkg_arch}\")) | .browser_download_url")
+            wget ${dl_url}
+            unzip tflint_linux_amd64.zip
+            mkdir -p /usr/local/tflint/bin
+            # Setup PATH for later run steps - ONLY for Bash and not in Bash
+            #echo 'export PATH=/usr/local/tflint/bin:$PATH' >> $BASH_ENV
+            echo "Installing tflint..."
+            install tflint /usr/local/tflint/bin
+            echo "Configuring tflint..."
+            tf_ver=$(terraform version | awk 'FNR <= 1' | cut -dv -f2)
+            echo -e "\tConfig for terraform version: ${tf_ver}"
+            if [ -f '.tflint.hcl' ]; then
+              sed -i "/terraform_version =/s/\".*\"/\"${tf_ver}\"/" .tflint.hcl
+            else
+              {
+              echo -e "config {\nterraform_version = \"${tf_ver}\"\ndeep_check = true\nignore_module = {"
+              for module in $(grep -h '[^a-zA-Z]source[ =]' *.tf | sed -r 's/.*=\s+//' | sort -u); do
+                # if not ^"../
+                echo "${module} = true"
+              done
+              echo -e "}\n}\n"
+              } > .tflint.hcl
+              fi
+            echo "tflint configuration:"
+            cat .tflint.hcl
+    - run:
+        # Not supporting modules from registry ?? v0.5.4
+        # For now, must ignore in config file
+        name: "Check: tflint"
+        command: |
+            #echo "Initializing terraform..."
+            #terraform init -input=false
+            echo "Running tflint..."
+            /usr/local/tflint/bin/tflint --version
+            /usr/local/tflint/bin/tflint
+
+jobs:
+  ###
+  ### Documentation testing: Markdown
+  ###
+  # Markdown Lint https://github.com/DavidAnson/markdownlint
+  # CLI https://github.com/igorshubovych/markdownlint-cli
+  # https://hub.docker.com/r/circleci/node/tags/
+  markdown_lint_node:
+    docker:
+      - image: circleci/node:10.5.0
+    steps:
+      - checkout
+      - run:
+          name: "Install: markdown lint (node.js)"
+          command: |
+              sudo npm install -g markdownlint-cli
+      - run:
+          name: "Check: markdown lint (node.js)"
+          command: |
+              #markdownlint --help
+              echo -n "markdownlint version: "
+              markdownlint --version
+              markdownlint ./
+  # Markdown Lint https://github.com/markdownlint/markdownlint
+  # https://hub.docker.com/r/circleci/ruby/tags/
+  markdown_lint_ruby:
+    docker:
+      - image: circleci/ruby:2.5.1
+    steps:
+      - checkout
+      - run:
+          name: "Install: markdown lint (ruby)"
+          command: |
+              gem install mdl
+      - run:
+          name: "Check: markdown lint (ruby)"
+          command: |
+              #mdl --help
+              echo -n "mdl version: "
+              mdl --version
+              mdl .
+  markdown_proofer:
+    docker:
+      - image: circleci/golang:1.10
+        entrypoint: /bin/sh
+    steps:
+      - checkout
+      - run:
+          name: "Install: markdown proofer"
+          command: |
+              # Get latest version
+              pkg_arch=linux_amd64
+              # Prerelease, so latest doesn't work yet
+              #dl_url=$(curl -s https://api.github.com/repos/felicianotech/md-proofer/releases/latest | jq -r ".assets[] | select(.name | test(\"${pkg_arch}\")) | .browser_download_url")
+              dl_url='https://github.com/felicianotech/md-proofer/releases/download/v0.2.0/md-proofer--v0.2.0--linux-amd64.tar.gz'
+              wget ${dl_url}
+              tar xzf md-proofer--v0.2.0--linux-amd64.tar.gz
+      - run:
+          name: "Check: markdown proofer"
+          command: |
+              ./md-proofer version
+              #./md-proofer lint --help
+              # Will this find all *.md in directory structure or need to run in each directory ?
+              if ./md-proofer lint ./; then
+                echo "md-proofer passed"
+              else
+                echo "md-proofer failed"
+              fi
+  ###
+  ### Terraform testing
+  ###
+  terraform_0_11_3:
+    docker:
+      - image: hashicorp/terraform:0.11.3
+        entrypoint: /bin/sh
+    <<: *steps_terraform_static_analysis
+
+  terraform_0_11_7:
+    docker:
+      - image: hashicorp/terraform:0.11.7
+        entrypoint: /bin/sh
+    <<: *steps_terraform_static_analysis
+
+  terraform_latest:
+    docker:
+      - image: hashicorp/terraform:latest
+        entrypoint: /bin/sh
+    <<: *steps_terraform_static_analysis
+
+workflows:
+  version: 2
+  terraform_testing:
+    jobs:
+      - markdown_lint_node
+      - markdown_lint_ruby
+      # Currently doesn't do anything that markdownlint node doesn't do
+      #- markdown_proofer
+      - terraform_0_11_3
+      - terraform_0_11_7
+      - terraform_latest
diff --git a/README.md b/README.md
index be80bef..5710fa5 100644
--- a/README.md
+++ b/README.md
@@ -1,15 +1,29 @@
-Terraform module to simplify and expand boolean use
-===
+# terraform-local-boolean
 
-Since Terraform currently doesn't have a boolean variable type, this provides a consistent handling. The list of true values is also expanded.
+[![CircleCI](https://circleci.com/gh/devops-workflow/terraform-local-boolean.svg?style=svg)](https://circleci.com/gh/devops-workflow/terraform-local-boolean)
 
-Designed to simplify the use of booleans (especially where 1 variable is tested many times) and the using count to enable/disable resources.
+## Terraform module to simplify and expand boolean use
+
+Since Terraform currently doesn't have a boolean variable type, this provides a
+consistent handling. The list of true values is also expanded.
+
+Designed to simplify the use of booleans (especially where 1 variable is tested
+many times) and the using count to enable/disable resources.
 
 * Will handle any capitalization of the input value.
 * Will return 1 for any true value, 0 for anything else.
 * Current true values: true, t, 1, on, enable
 
-Example: If
+All [devops-workflow](https://registry.terraform.io/search?q=devops-workflow&verified=false)
+modules will eventually use this.
+
+**NOTE:** `local` refers to this using [locals](https://www.terraform.io/docs/configuration/locals.html)
+and does not create any resources. It just builds new variables.
+
+[This module at Terraform registry](https://registry.terraform.io/modules/devops-workflow/boolean/local)
+
+### Example: If
+
 ```hcl
 module "boolean" {
   source  = "devops-workflow/boolean/local"
@@ -19,7 +33,8 @@ module "boolean" {
 var = "${module.boolean.value ? "true setting" : "false setting"}"
 ```
 
-Example: count for enabling/disabling a resource
+### Example: count for enabling/disabling a resource
+
 ```hcl
 module enabled" {
   source  = "devops-workflow/boolean/local"
diff --git a/main.tf b/main.tf
index 368b115..5f91736 100644
--- a/main.tf
+++ b/main.tf
@@ -3,7 +3,8 @@
 #
 
 locals {
-  l     = "${lower(var.value)}"
+  l = "${lower(var.value)}"
+
   value = "${
     local.l == "true" ||
     local.l == "t" ||
diff --git a/outputs.tf b/outputs.tf
index c649261..9fe588f 100644
--- a/outputs.tf
+++ b/outputs.tf
@@ -1,4 +1,3 @@
-
 output "value" {
   description = "1 if input was tested `true`, 0 otherwise"
   value       = "${local.value}"
diff --git a/test/main.tf b/test/main.tf
index 5386dd2..63c15f0 100644
--- a/test/main.tf
+++ b/test/main.tf
@@ -1,29 +1,44 @@
-
 module "true" {
-  source  = "../"
-  value   = "true"
+  source = "../"
+  value  = "true"
 }
+
 module "t" {
-  source  = "../"
-  value   = "t"
+  source = "../"
+  value  = "t"
 }
+
 module "one" {
-  source  = "../"
-  value   = "1"
+  source = "../"
+  value  = "1"
 }
+
 module "on" {
-  source  = "../"
-  value   = "on"
+  source = "../"
+  value  = "on"
 }
+
 module "enable" {
-  source  = "../"
-  value   = "enable"
+  source = "../"
+  value  = "enable"
 }
+
 module "false" {
-  source  = "../"
-  value   = "false"
+  source = "../"
+  value  = "false"
 }
+
 module "xyz" {
-  source  = "../"
-  value   = "xyz"
+  source = "../"
+  value  = "xyz"
+}
+
+module "t_and_f" {
+  source = "../"
+  value  = "${module.true.value && module.false.value}"
+}
+
+module "t_or_f" {
+  source = "../"
+  value  = "${module.true.value || module.false.value}"
 }
diff --git a/test/outputs.tf b/test/outputs.tf
index 278512a..130fc9c 100644
--- a/test/outputs.tf
+++ b/test/outputs.tf
@@ -1,22 +1,35 @@
-
 output "true" {
-  value   = "${module.true.value}"
+  value = "${module.true.value}"
 }
+
 output "t" {
-  value   = "${module.t.value}"
+  value = "${module.t.value}"
 }
+
 output "one" {
-  value   = "${module.one.value}"
+  value = "${module.one.value}"
 }
+
 output "on" {
-  value   = "${module.on.value}"
+  value = "${module.on.value}"
 }
+
 output "enable" {
-  value   = "${module.enable.value}"
+  value = "${module.enable.value}"
 }
+
 output "false" {
-  value   = "${module.false.value}"
+  value = "${module.false.value}"
 }
+
 output "xyz" {
-  value   = "${module.xyz.value}"
+  value = "${module.xyz.value}"
+}
+
+output "t_and_f" {
+  value = "${module.t_and_f.value}"
+}
+
+output "t_or_f" {
+  value = "${module.t_or_f.value}"
 }