diff --git a/.github/workflows/dev.yml b/.github/workflows/dev.yml
index 09758223..3bc0fb60 100644
--- a/.github/workflows/dev.yml
+++ b/.github/workflows/dev.yml
@@ -29,7 +29,38 @@ permissions:
   id-token: "write"
 
 jobs:
+  check_changes:
+    name: "Deduce required tests from code changes"
+    runs-on: "ubuntu-latest"
+    outputs:
+      devfiles: "${{ steps.changes.outputs.devfiles }}"
+    steps:
+      - name: "Checkout"
+        if: "${{ !github.event.pull_request }}"
+        uses: "actions/checkout@v4"
+        with:
+          persist-credentials: "true"
+          fetch-depth: "0"
+      - name: "Check code changes"
+        uses: "dorny/paths-filter@v3"
+        id: "changes"
+        with:
+          # For "push" events, compare against the "ref" base branch.
+          # For "pull_request" events, this is ignored and will compare against
+          # the pull request base branch.
+          base: "${{ github.ref }}"
+          predicate-quantifier: 'every'
+          filters: |
+            devfiles:
+              - '!(README.md)'
+              - '!(LICENSE)'
+              - '!(design-docs/**)'
+              - '!(.gitignore)'
+              - '!(.github/!(workflows/devv.yml))'
+
   build:
+    needs: [ check_changes ]
+    if: "${{ needs.check_changes.outputs.devfiles == 'true' }}"
     strategy:
       fail-fast: false
       matrix:
@@ -139,10 +170,10 @@ jobs:
 
   summary:
     name: "summary"
-    if: ${{ always() }}
     runs-on: "ubuntu-latest"
     needs:
       - build
+    if: ${{ always() && needs.build.result != 'skipped' }}
     steps:
       - name: "Flag any build matrix failures"
         if: ${{ needs.build.result != 'success' }}
diff --git a/.github/workflows/sterile.yml b/.github/workflows/sterile.yml
index b0dd1b12..dd4ee2f0 100644
--- a/.github/workflows/sterile.yml
+++ b/.github/workflows/sterile.yml
@@ -18,7 +18,38 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
+  check_changes:
+    name: "Deduce required tests from code changes"
+    runs-on: "ubuntu-latest"
+    outputs:
+      devfiles: "${{ steps.changes.outputs.devfiles }}"
+    steps:
+      - name: "Checkout"
+        if: "${{ !github.event.pull_request }}"
+        uses: "actions/checkout@v4"
+        with:
+          persist-credentials: "true"
+          fetch-depth: "0"
+      - name: "Check code changes"
+        uses: "dorny/paths-filter@v3"
+        id: "changes"
+        with:
+          # For "push" events, compare against the "ref" base branch.
+          # For "pull_request" events, this is ignored and will compare against
+          # the pull request base branch.
+          base: "${{ github.ref }}"
+          predicate-quantifier: 'every'
+          filters: |
+            devfiles:
+              - '!(README.md)'
+              - '!(LICENSE)'
+              - '!(design-docs/**)'
+              - '!(.gitignore)'
+              - '!(.github/!(workflows/sterile.yml))'
+
   test:
+    needs: [ check_changes ]
+    if: "${{ needs.check_changes.outputs.devfiles == 'true' }}"
     permissions:
       contents: "read"
       packages: "read"
@@ -137,6 +168,8 @@ jobs:
           limit-access-to-actor: true
 
   push:
+    needs: [ check_changes ]
+    if: "${{ needs.check_changes.outputs.devfiles == 'true' }}"
     permissions:
       contents: "read"
       packages: "write"
@@ -199,11 +232,11 @@ jobs:
 
   summary:
     name: "summary"
-    if: ${{ always() }}
     runs-on: "ubuntu-latest"
     needs:
       - test
       - push
+    if: ${{ always() && needs.test.result != 'skipped' && needs.push.result != 'skipped' }}
     steps:
       - name: "Flag any test failures"
         if: ${{ needs.test.result != 'success' }}