I think I understand the workflow now

.github/workflows/build-on-commit.yml

@@ -1,13 +0,0 @@
-name: Build Commit
-on:
-  push:
-    branches:
-      - "*"
-      - "!master"
-
-jobs:
-  call-build:
-    runs-on: ubuntu-latest
-    needs: build
-    steps:
-      - uses: ./.github/workflows/build-site.yml

.github/workflows/build.yml

@@ -1,6 +1,12 @@
 name: Build Website
 
 on:
+  push:
+    branches:
+      - "*"
+      # Master has its own set of build rules,
+      # and will eventually call this script on its own
+      - "!master"
   workflow_call:
 
 jobs:
@@ -31,3 +37,9 @@ jobs:
 
       - name: Delete dist gitignore
         run: sudo rm -f ./public/dist/.gitignore
+
+      - name: Publish site as artifact
+        uses: actions/upload-artifact@v2
+        with:
+          name: website-static-bundle
+          path: ./public

.github/workflows/deploy.yml

@@ -5,12 +5,18 @@ on:
       - "master"
 
 jobs:
+  build:
+    uses: ./.github/workflows/build.yml
+
   deploy:
     runs-on: ubuntu-latest
     needs: build
     steps:
-      - name: Build Site
-        uses: ./.github/workflows/common/build-site.yml
+      - name: Download bundle artifact
+        uses: actions/download-artifact@v2
+        with:
+          name: website
+          path: ./public
 
       - name: Deploy to GitHub Pages
         if: success()