diff --git a/.github/actions/build/action.yml b/.github/actions/build/action.yml
new file mode 100644
index 0000000..98ecb71
--- /dev/null
+++ b/.github/actions/build/action.yml
@@ -0,0 +1,32 @@
+name: Build
+
+runs:
+  using: composite
+  steps:
+    - uses: actions/checkout@v4
+    
+    - name: Add MSBuild to PATH
+      uses: microsoft/setup-msbuild@v1.0.2
+
+    - name: Build toast-win7
+      shell: powershell
+      working-directory: ${{github.workspace}}\win7
+      run: msbuild /m /p:Configuration=Release Win7Notify.sln
+
+    - name: Build toast-win10
+      shell: powershell
+      working-directory: ${{github.workspace}}\win10
+      run: cargo build --verbose --release
+
+    - name: Gather artifacts
+      shell: bash
+      run: |
+        mkdir -p gathered_artifacts
+        mv win7/x64/Release/toast-win7.exe gathered_artifacts/
+        mv win10/target/release/toast-win10.exe gathered_artifacts/
+
+    - name: Summarize
+      shell: bash
+      run: |
+        chmod +x .github/workflows/scripts/summarize.py
+        python3 .github/workflows/scripts/summarize.py gathered_artifacts
\ No newline at end of file
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
deleted file mode 100644
index 5675b1a..0000000
--- a/.github/workflows/build.yml
+++ /dev/null
@@ -1,28 +0,0 @@
-name: Build
-
-on:
-  push:
-    branches: [ "master" ]
-
-jobs:
-  build:
-    runs-on: windows-latest
-
-    steps:
-    - uses: actions/checkout@v4
-
-    - name: Add MSBuild to PATH
-      uses: microsoft/setup-msbuild@v1.0.2
-    - name: Build toast-win10
-      working-directory: ${{github.workspace}}\win10
-      run: cargo build --verbose --release
-    - name: Build toast-win7
-      working-directory: ${{github.workspace}}\win7
-      run: msbuild /m /p:Configuration=Release Win7Notify.sln
-    - name: Upload
-      uses: actions/upload-artifact@v4
-      with:
-        name: ChatToolsAddon
-        path: |
-          win7/x64/Release/toast-win7.exe
-          win10/target/release/toast-win10.exe
\ No newline at end of file
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..e136fc2
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,19 @@
+name: CI
+
+on: [ push, pull_request ]
+
+jobs:
+  build-and-summarize:
+    runs-on: windows-latest
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Build & Summarize
+      uses: ./.github/actions/build/
+
+    - name: Upload
+      uses: actions/upload-artifact@v4
+      with:
+        name: ChatToolsAddon
+        path: gathered_artifacts/
\ No newline at end of file
diff --git a/.github/workflows/scripts/summarize.py b/.github/workflows/scripts/summarize.py
new file mode 100644
index 0000000..ace1777
--- /dev/null
+++ b/.github/workflows/scripts/summarize.py
@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+import sys
+import os
+import hashlib
+
+def compute_md5(filepath, chunk_size=8192):
+    md5 = hashlib.md5()
+    with open(filepath, 'rb') as f:
+        for chunk in iter(lambda: f.read(chunk_size), b''):
+            md5.update(chunk)
+    return md5.hexdigest()
+
+def main():
+    if len(sys.argv) != 2:
+        print(f"Usage: {sys.argv[0]} <dir>")
+        sys.exit(1)
+
+    target_dir = sys.argv[1]
+    summary_path = os.environ.get('GITHUB_STEP_SUMMARY')
+    if not summary_path:
+        print("No GITHUB_STEP_SUMMARY!")
+        sys.exit(1)
+
+    entries = sorted(os.listdir(target_dir))
+    with open(summary_path, 'a', encoding='utf-8') as s:
+        s.write("## MD5 Checksums:\n\n")
+        s.write('| File | Size | MD5 |\n')
+        s.write('| --- | --- | --- |\n')
+
+        for name in entries:
+            full = os.path.join(target_dir, name)
+            if os.path.isfile(full):
+                file_size = f'{os.path.getsize(full)} B'
+                checksum = compute_md5(full)
+                with open(full + '.md5', 'w', encoding='utf-8') as mf:
+                    mf.write(f"{checksum}")
+                s.write(f"| {name} | {file_size} | {checksum} |\n")
+
+if __name__ == '__main__':
+    main()