diff --git a/.github/workflows/inspect.yml b/.github/workflows/inspect.yml
new file mode 100644
index 0000000..1a8dfbd
--- /dev/null
+++ b/.github/workflows/inspect.yml
@@ -0,0 +1,83 @@
+# When a PR is opened or a push is made, perform an
+# architectural inspection on the code using Deptrac.
+name: Deptrac
+
+on:
+  pull_request:
+    branches:
+      - 'develop'
+    paths:
+      - 'src/**'
+      - 'tests/**'
+      - 'composer.**'
+      - 'depfile.yaml'
+      - '.github/workflows/inspect.yml'
+  push:
+    branches:
+      - 'develop'
+    paths:
+      - 'src/**'
+      - 'tests/**'
+      - 'composer.**'
+      - 'depfile.yaml'
+      - '.github/workflows/inspect.yml'
+
+jobs:
+  build:
+    name: PHP ${{ matrix.php-versions }} Architectural Inspection
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        php-versions: ['7.4', '8.0']
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-versions }}
+          tools: composer, pecl, phive, phpunit
+          extensions: intl, json, mbstring, gd, mysqlnd, xdebug, xml, sqlite3
+        env:
+          COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Get composer cache directory
+        id: composer-cache
+        run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+
+      - name: Create composer cache directory
+        run: mkdir -p ${{ steps.composer-cache.outputs.dir }}
+
+      - name: Cache composer dependencies
+        uses: actions/cache@v2
+        with:
+          path: ${{ steps.composer-cache.outputs.dir }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
+          restore-keys: ${{ runner.os }}-composer-
+
+      - name: Create Deptrac cache directory
+        run: mkdir -p build/
+
+      - name: Cache Deptrac results
+        uses: actions/cache@v2
+        with:
+          path: build
+          key: ${{ runner.os }}-deptrac-${{ github.sha }}
+          restore-keys: ${{ runner.os }}-deptrac-
+
+      - name: Install dependencies (limited)
+        if: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name != github.event.pull_request.base.repo.full_name }}
+        run: composer update --no-progress --no-interaction --prefer-dist --optimize-autoloader
+
+      - name: Install dependencies (authenticated)
+        if: ${{ github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.event.pull_request.base.repo.full_name }}
+        run: composer update --no-progress --no-interaction --prefer-dist --optimize-autoloader
+        env:
+          COMPOSER_AUTH: ${{ secrets.COMPOSER_AUTH }}
+
+      - name: Run architectural inspection
+        run: |
+            sudo phive --no-progress install --global qossmic/deptrac --trust-gpg-keys B8F640134AB1782E
+            deptrac analyze --cache-file=build/deptrac.cache
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 7bfa417..561601d 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -55,13 +55,11 @@ jobs:
         env:
           COMPOSER_AUTH: ${{ secrets.COMPOSER_AUTH }}
 
-      - name: Enable Tachycardia
-        run: echo "TACHYCARDIA_MONITOR_GA=enabled" >> $GITHUB_ENV
-
       - name: Test with PHPUnit
         run: vendor/bin/phpunit --verbose --coverage-text
         env:
           TERM: xterm-256color
+          TACHYCARDIA_MONITOR_GA: enabled
 
       - if: matrix.php-versions == '8.0'
         name: Mutate with Infection
diff --git a/composer.json b/composer.json
index f592e4f..c8adc2a 100644
--- a/composer.json
+++ b/composer.json
@@ -58,6 +58,7 @@
     "prefer-stable": true,
     "scripts": {
         "analyze": "phpstan analyze",
+        "inspect": "deptrac analyze --cache-file=build/deptrac.cache",
         "mutate": "infection --threads=2 --skip-initial-tests --coverage=build/phpunit",
         "style": "php-cs-fixer fix --verbose --ansi",
         "test": "phpunit"
diff --git a/depfile.yaml b/depfile.yaml
new file mode 100644
index 0000000..79ec82a
--- /dev/null
+++ b/depfile.yaml
@@ -0,0 +1,153 @@
+paths:
+  - ./src
+  - ./vendor/codeigniter4/codeigniter4/system
+  - ./vendor/tatter
+exclude_files:
+  - '#.*test.*#i'
+layers:
+  - name: Model
+    collectors:
+      - type: bool
+        must:
+        - type: className
+          regex: .*[A-Za-z]+Model$
+        must_not:
+        - type: directory
+          regex: vendor/.*
+  - name: Vendor Model
+    collectors:
+      - type: bool
+        must:
+        - type: className
+          regex: .*[A-Za-z]+Model$
+        - type: directory
+          regex: vendor/.*
+  - name: Controller
+    collectors:
+      - type: bool
+        must:
+        - type: className
+          regex: .*\/Controllers\/.*
+        must_not:
+        - type: directory
+          regex: vendor/.*
+  - name: Vendor Controller
+    collectors:
+      - type: bool
+        must:
+        - type: className
+          regex: .*\/Controllers\/.*
+        - type: directory
+          regex: vendor/.*
+  - name: Config
+    collectors:
+      - type: bool
+        must:
+        - type: directory
+          regex: src/Config/.*
+        must_not:
+        - type: className
+          regex: .*Services
+        - type: directory
+          regex: vendor/.*
+  - name: Vendor Config
+    collectors:
+      - type: bool
+        must:
+        - type: directory
+          regex: vendor/.*/Config/.*
+        must_not:
+        - type: className
+          regex: .*Services
+  - name: Entity
+    collectors:
+      - type: bool
+        must:
+        - type: directory
+          regex: src/Entities/.*
+        must_not:
+        - type: directory
+          regex: vendor/.*
+  - name: Vendor Entity
+    collectors:
+      - type: bool
+        must:
+        - type: directory
+          regex: vendor/.*/Entities/.*
+  - name: View
+    collectors:
+      - type: bool
+        must:
+        - type: directory
+          regex: src/Views/.*
+        must_not:
+        - type: directory
+          regex: vendor/.*
+  - name: Vendor View
+    collectors:
+      - type: bool
+        must:
+        - type: directory
+          regex: vendor/.*/Views/.*
+  - name: Service
+    collectors:
+      - type: className
+        regex: .*Services.*
+ruleset:
+  Entity:
+    - Config
+    - Model
+    - Service
+    - Vendor Config
+    - Vendor Entity
+    - Vendor Model
+  Config:
+    - Service
+    - Vendor Config
+  Model:
+    - Config
+    - Entity
+    - Service
+    - Vendor Config
+    - Vendor Model
+  Service:
+    - Config
+    - Vendor Config
+
+  # Ignore anything in the Vendor layers
+  Vendor Model:
+    - Service
+    - Vendor Config
+    - Vendor Controller
+    - Vendor Entity
+    - Vendor Model
+    - Vendor View
+  Vendor Controller:
+    - Service
+    - Vendor Config
+    - Vendor Controller
+    - Vendor Entity
+    - Vendor Model
+    - Vendor View
+  Vendor Config:
+    - Service
+    - Vendor Config
+    - Vendor Controller
+    - Vendor Entity
+    - Vendor Model
+    - Vendor View
+  Vendor Entity:
+    - Service
+    - Vendor Config
+    - Vendor Controller
+    - Vendor Entity
+    - Vendor Model
+    - Vendor View
+  Vendor View:
+    - Service
+    - Vendor Config
+    - Vendor Controller
+    - Vendor Entity
+    - Vendor Model
+    - Vendor View
+skip_violations: