diff --git a/.github/actions/determine-complexity/action.yml b/.github/actions/determine-complexity/action.yml
new file mode 100644
index 0000000000..52c3770395
--- /dev/null
+++ b/.github/actions/determine-complexity/action.yml
@@ -0,0 +1,37 @@
+name: Determine Complexity
+description: 'Determine the complexity of the PR'
+
+inputs:
+  file-changed-limit:
+    description: 'The limit of files changed in the PR to throw a major complexity'
+    required: true
+    type: number
+  lines-changed-limit:
+    description: 'The limit of lines changed in the PR to throw a major complexity'
+    required: true
+    type: number
+
+runs:
+  using: "composite"
+
+  steps:
+    - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+    - name: Determine complexity
+      uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
+      env:
+        file-changed-limit: ${{ inputs.file-changed-limit }}
+        line-changed-limit: ${{ inputs.lines-changed-limit }}
+      with:
+        script: |
+          console.log('Determine Complexity');
+          console.log(`File changed limit: ${process.env.fileChangedLimit}`);
+          const determineComplexity = require('./.github/actions/determine-complexity/determine-pr-complexity.js');
+
+          determineComplexity({
+            core,
+            github,
+            context,
+            fileChangedLimit: process.env.fileChangedLimit,
+            lineChangedLimit: process.env.lineChangedLimit
+          });
+
diff --git a/.github/actions/determine-complexity/determine-pr-complexity.js b/.github/actions/determine-complexity/determine-pr-complexity.js
new file mode 100644
index 0000000000..73f1895173
--- /dev/null
+++ b/.github/actions/determine-complexity/determine-pr-complexity.js
@@ -0,0 +1,92 @@
+/*!
+ * @license
+ * Copyright © 2005-2023 Hyland Software, Inc. and its affiliates. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+async function getPRDetails(github, core, owner, repo, pull_number) {
+    core.info(`Fetching PR details`);
+
+    const { data: files } = await github.pulls.listFiles({
+        owner,
+        repo,
+        pull_number
+    });
+
+    core.info(`Fetched PR details: ${JSON.stringify(files)}`);
+
+    let filesChanged = files.length;
+    let linesChanged = files.reduce((total, file) => total + file.additions + file.deletions, 0);
+
+    let level = 'unknown';
+    let packageName = 'unknown';
+    let packagesAffected = new Set();
+    for (let file of files) {
+        if (file.filename.startsWith('lib/core/')) {
+            if (file.filename.startsWith('lib/core/auth/')) {
+                level = 'extreme';
+            }
+            level = 'major';
+            packageName = 'core';
+            packagesAffected.add(packageName);
+            break;
+        } else if (file.filename.startsWith('lib/extensions/')) {
+            level = 'major';
+            packageName = 'extensions';
+            packagesAffected.add(packageName);
+
+            break;
+        } else {
+            level = 'minor';
+            packagesAffected.add(packageName);
+        }
+    }
+
+    if (level !== 'major') {
+        if (linesChanged > 100) {
+            level = 'major';
+        } else if (linesChanged > 50) {
+            level = 'medium';
+        }
+    }
+
+    if (level !== 'major') {
+        if (filesChanged > 10) {
+            level = 'major';
+        } else if (filesChanged > 5) {
+            level = 'medium';
+        }
+    }
+
+    return {
+        filesChanged,
+        linesChanged,
+        level: level,
+        packagesAffected: Array.from(packagesAffected)
+    };
+}
+
+module.exports = async ({ core, github, context, fileChangedLimit = 5, linesChangedLimit = 50 }) => {
+    const owner = context.repo.owner;
+    const repo = context.repo.repo;
+    const pull_number = context.payload.pull_request.number;
+
+    core.info(`Getting PR details for ${owner}/${repo}#${pull_number}`);
+    core.info(`Limit for files changed: ${fileChangedLimit}`);
+    core.info(`Limit for lines changed: ${linesChangedLimit}`);
+
+    const details = await getPRDetails(github, owner, repo, pull_number);
+
+    core.info(`PR details: ${JSON.stringify(details)}`);
+};
diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index 82589df074..f24f1c2119 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -509,9 +509,10 @@ jobs:
         with:
           fetch-depth: 1
       - name: Determine complexity
-        id: complexity
-        run: |
-          echo "level=major" >> $GITHUB_OUTPUT
+        uses: ./.github/actions/determine-complexity
+        with:
+          file-changed-limit: 10
+          lines-changed-limit: 100
 
   verify-downstream:
     needs: determine-complexity