diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..f1a76d4
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,40 @@
+name: Test
+
+on:
+  push:
+    branches: ["main", "library-rework"]
+  pull_request:
+    branches: [main]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  test:
+    name: Test
+    runs-on: ${{matrix.os}}
+    defaults:
+      run:
+        shell: bash
+    strategy:
+      matrix:
+        include:
+          - build: linux
+            os: ubuntu-latest
+            rust: beta
+            target: x86_64-unknown-linux-musl
+            cross: false
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 1
+
+      - name: Install 
+        run: npm i
+
+      - name: Unit Test 
+        run: npm run test
+
+      - name: Behavior Test
+        run: ./test_ci.sh
diff --git a/test_ci.sh b/test_ci.sh
new file mode 100755
index 0000000..1c3518c
--- /dev/null
+++ b/test_ci.sh
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+cd $SCRIPT_DIR
+
+GADGET_CLI=$(realpath "$SCRIPT_DIR/src/cli.js")
+
+npx -y toolproof --placeholders gadget_cli="$GADGET_CLI"
\ No newline at end of file
diff --git a/test_interactive.sh b/test_interactive.sh
new file mode 100755
index 0000000..f6ec7f7
--- /dev/null
+++ b/test_interactive.sh
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+cd $SCRIPT_DIR
+
+GADGET_CLI=$(realpath "$SCRIPT_DIR/src/cli.js")
+
+npx -y toolproof --placeholders gadget_cli="$GADGET_CLI" --all -i
diff --git a/toolproof_tests/demo.toolproof.yml b/toolproof_tests/demo.toolproof.yml
new file mode 100644
index 0000000..0ff25fe
--- /dev/null
+++ b/toolproof_tests/demo.toolproof.yml
@@ -0,0 +1,74 @@
+name: Text Example 1
+
+steps:
+  - step: I have a ".eleventy.js" file with the content {js}
+    js: |-
+      const pluginRss = require("@11ty/eleventy-plugin-rss");
+
+      module.exports = function (eleventyConfig) {
+        eleventyConfig.setUseGitIgnore(false);
+        eleventyConfig.setDataDeepMerge(true);
+
+        eleventyConfig.addCollection('nav', function (collectionApi) {
+          return collectionApi.getAll()
+            .filter((page) => page.data.show_in_navigation === true)
+            .sort((a, b) => a.data.navigation_order - b.data.navigation_order);
+        });
+
+        eleventyConfig.addPassthroughCopy('images');
+
+        eleventyConfig.addPlugin(pluginRss);
+      };
+  - step: I have a "pages/index.njk" file with the content {njk}
+    njk: |-
+      ---
+      title:
+      call_to_action: Contact
+      permalink: /
+      ---
+      <div class="editable">
+        <p>This is the <strong>Justice</strong> template from <a href="https://cloudcannon.com/">CloudCannon</a>. Justice is strong foundation for the web presence of a law firm or business. It's filled with fictitious example content to get you started.</p>
+
+        <p>Justice Law is professional representation. Practicing for over 50 years, our team have the knowledge and skills to get you results.</p>
+      </div>
+  - step: I have a "staff-members/jane-doe.md" file with the content {md}
+    md: |-
+      ---
+      _uuid: 05589684-8d33-4d2f-8fde-460f9922d319
+      name: Jane Doe
+      image: "https://placekitten.com/440/440?a=.png"
+      description: Jane has 19 years of experience in law, and specialises in property and business.
+      credentials: LLB
+      phone_extension: "02"
+      ---
+  - step: I have a "staff-members/john-doe.md" file with the content {md}
+    md: |-
+      ---
+      _uuid: 8c6c132e-1c21-413e-be81-874091df1841
+      name: John Doe
+      image: "https://placebear.com/440/440?a=.png"
+      description: With an interest in employment law, John works tirelessly to improve workplaces.
+      credentials: LLB
+      phone_extension: "11"
+      ---
+  - I run "node %gadget_cli% ."
+  - stdout should contain "eleventy"
+  - snapshot: stdout
+    snapshot_content: |-
+      ╎{
+      ╎  "ssg": "eleventy",
+      ╎  "source": "",
+      ╎  "collections_config": {
+      ╎    "pages": {
+      ╎      "path": "",
+      ╎      "name": "Pages",
+      ╎      "icon": "wysiwyg",
+      ╎      "filter": {
+      ╎        "base": "strict"
+      ╎      }
+      ╎    }
+      ╎  },
+      ╎  "paths": {
+      ╎    "collections": ""
+      ╎  }
+      ╎}
diff --git a/toolproof_tests/refs_example/demo_test.toolproof.yml b/toolproof_tests/refs_example/demo_test.toolproof.yml
new file mode 100644
index 0000000..e304a44
--- /dev/null
+++ b/toolproof_tests/refs_example/demo_test.toolproof.yml
@@ -0,0 +1,38 @@
+name: Demo Test with Refs
+
+steps:
+  - ref: ./eleventy_config.toolproof.yml
+  - ref: ./staff_collection.toolproof.yml
+  - step: I have a "pages/index.njk" file with the content {njk}
+    njk: |-
+      ---
+      title:
+      call_to_action: Contact
+      permalink: /
+      ---
+      <div class="editable">
+        <p>This is the <strong>Justice</strong> template from <a href="https://cloudcannon.com/">CloudCannon</a>. Justice is strong foundation for the web presence of a law firm or business. It's filled with fictitious example content to get you started.</p>
+
+        <p>Justice Law is professional representation. Practicing for over 50 years, our team have the knowledge and skills to get you results.</p>
+      </div>
+  - I run "node %gadget_cli% ."
+  - stdout should contain "eleventy"
+  - snapshot: stdout
+    snapshot_content: |-
+      ╎{
+      ╎  "ssg": "eleventy",
+      ╎  "source": "",
+      ╎  "collections_config": {
+      ╎    "pages": {
+      ╎      "path": "",
+      ╎      "name": "Pages",
+      ╎      "icon": "wysiwyg",
+      ╎      "filter": {
+      ╎        "base": "strict"
+      ╎      }
+      ╎    }
+      ╎  },
+      ╎  "paths": {
+      ╎    "collections": ""
+      ╎  }
+      ╎}
diff --git a/toolproof_tests/refs_example/eleventy_config.toolproof.yml b/toolproof_tests/refs_example/eleventy_config.toolproof.yml
new file mode 100644
index 0000000..7654e08
--- /dev/null
+++ b/toolproof_tests/refs_example/eleventy_config.toolproof.yml
@@ -0,0 +1,22 @@
+name: 11ty Config Setup
+type: reference
+
+steps:
+  - step: I have a ".eleventy.js" file with the content {js}
+    js: |-
+      const pluginRss = require("@11ty/eleventy-plugin-rss");
+
+      module.exports = function (eleventyConfig) {
+        eleventyConfig.setUseGitIgnore(false);
+        eleventyConfig.setDataDeepMerge(true);
+
+        eleventyConfig.addCollection('nav', function (collectionApi) {
+          return collectionApi.getAll()
+            .filter((page) => page.data.show_in_navigation === true)
+            .sort((a, b) => a.data.navigation_order - b.data.navigation_order);
+        });
+
+        eleventyConfig.addPassthroughCopy('images');
+
+        eleventyConfig.addPlugin(pluginRss);
+      };
diff --git a/toolproof_tests/refs_example/staff_collection.toolproof.yml b/toolproof_tests/refs_example/staff_collection.toolproof.yml
new file mode 100644
index 0000000..09c35a9
--- /dev/null
+++ b/toolproof_tests/refs_example/staff_collection.toolproof.yml
@@ -0,0 +1,24 @@
+name: Staff Collection Setup
+type: reference
+
+steps:
+  - step: I have a "staff-members/jane-doe.md" file with the content {md}
+    md: |-
+      ---
+      _uuid: 05589684-8d33-4d2f-8fde-460f9922d319
+      name: Jane Doe
+      image: "https://placekitten.com/440/440?a=.png"
+      description: Jane has 19 years of experience in law, and specialises in property and business.
+      credentials: LLB
+      phone_extension: "02"
+      ---
+  - step: I have a "staff-members/john-doe.md" file with the content {md}
+    md: |-
+      ---
+      _uuid: 8c6c132e-1c21-413e-be81-874091df1841
+      name: John Doe
+      image: "https://placebear.com/440/440?a=.png"
+      description: With an interest in employment law, John works tirelessly to improve workplaces.
+      credentials: LLB
+      phone_extension: "11"
+      ---