diff --git a/.github/scripts/_meta.mts b/.github/scripts/_meta.mts
index 1847621d..576a2eac 100644
--- a/.github/scripts/_meta.mts
+++ b/.github/scripts/_meta.mts
@@ -8,6 +8,7 @@ export type Vertical = {
   readonly type: VerticalType;
   readonly name: string;
   readonly path: string;
+  readonly relPath: string;
   readonly rawConfig: Readonly<Record<string, unknown>>;
 };
 
@@ -33,7 +34,13 @@ const readVertical = (type: VerticalType, dirPath: string): Vertical => {
     name = config.name;
   }
 
-  return { type, name, path: verticalPath, rawConfig: config };
+  return {
+    type,
+    name,
+    path: verticalPath,
+    relPath: dirPath,
+    rawConfig: config,
+  };
 };
 
 const apps = await globby(`${vertialDirs.app}/*`, { onlyDirectories: true });
diff --git a/.github/scripts/list-verticals.mts b/.github/scripts/list-verticals.mts
index 2a463f2a..ac559982 100644
--- a/.github/scripts/list-verticals.mts
+++ b/.github/scripts/list-verticals.mts
@@ -8,4 +8,4 @@ if (type) {
   output = verticals.filter((v) => v.type === type);
 }
 
-actions.setOutput("verticals", JSON.stringify(output.map((v) => v.name)));
+actions.setOutput("verticals", JSON.stringify(output.map((v) => v.relPath)));
diff --git a/.github/workflows/ci-check-slns.yml b/.github/workflows/ci-check-slns.yml
new file mode 100644
index 00000000..628620e0
--- /dev/null
+++ b/.github/workflows/ci-check-slns.yml
@@ -0,0 +1,35 @@
+name: "CI: Check solution files"
+
+on:
+  push: {}
+
+jobs:
+  check-slns:
+    name: Check sln files
+    if: ((github.event_name == 'pull_request' && github.event.pull_request.head.repo.fork == false) || github.event_name == 'push') && github.repository_owner == 'Altinn' && github.actor != 'dependabot[bot]'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: |
+            8.0.x
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+
+      - uses: pnpm/action-setup@v3
+        with:
+          version: 9
+          run_install: |
+            - cwd: .github/scripts
+              args: [--frozen-lockfile]
+            - args: [--global, tsx]
+
+      - name: Update all sln files
+        run: tsx ./.github/scripts/update-sln-files.mts
+
+      - name: Assert that no sln files have changed
+        run: git diff --exit-code
diff --git a/.github/workflows/libs-ci.yml b/.github/workflows/libs-ci.yml
index 74181749..d0ecf241 100644
--- a/.github/workflows/libs-ci.yml
+++ b/.github/workflows/libs-ci.yml
@@ -16,7 +16,7 @@ jobs:
   find-verticals:
     uses: ./.github/workflows/_find-verticals.yml
     with:
-      type: app
+      type: lib
 
   ci:
     name: CI