diff --git a/.github/workflows/ci-beta.yml b/.github/workflows/ci-beta.yml
deleted file mode 100644
index 5b30267e7..000000000
--- a/.github/workflows/ci-beta.yml
+++ /dev/null
@@ -1,138 +0,0 @@
-# Beta-tier proxy, BHoM variant. Bundles the tier's checks plus
-# copyright-compliance (BHoM enforces OSS copyright; the BHE variant omits it).
-# Copy to .github/workflows/ci-beta.yml in each BHoM beta repo.
-# Runs on pull_request, non-blocking until a ruleset requires its checks.
-# Workflow name CI keeps check contexts bare: required contexts are the job names.
-
-name: CI
-
-on:
-  pull_request:
-    branches:
-      - develop
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.event_name }}
-  cancel-in-progress: true
-
-jobs:
-  ci-build:
-    runs-on: windows-2025-vs2026
-    timeout-minutes: 30
-    steps:
-      - name: Run build
-        uses: BuroHappoldEngineeringAdmin/CI_Toolkit/.github/actions/ci-build@develop
-        with:
-          app_id: ${{ secrets.BHOM_APP_ID }}
-          private_key: ${{ secrets.BHOM_APP_PRIVATE_KEY }}
-
-  ci-code-compliance:
-    runs-on: windows-2025-vs2026
-    timeout-minutes: 20
-    permissions:
-      contents: read
-      pull-requests: read
-      actions: write
-    steps:
-      - name: Run code compliance
-        uses: BuroHappoldEngineeringAdmin/CI_Toolkit/.github/actions/ci-compliance@develop
-        with:
-          check_type: code
-          patterns: '*.cs'
-          app_id: ${{ secrets.BHOM_APP_ID }}
-          private_key: ${{ secrets.BHOM_APP_PRIVATE_KEY }}
-
-  ci-copyright-compliance:
-    runs-on: windows-2025-vs2026
-    timeout-minutes: 20
-    permissions:
-      contents: read
-      pull-requests: read
-      actions: write
-    steps:
-      - name: Run copyright compliance
-        uses: BuroHappoldEngineeringAdmin/CI_Toolkit/.github/actions/ci-compliance@develop
-        with:
-          check_type: copyright
-          patterns: '*.cs'
-          app_id: ${{ secrets.BHOM_APP_ID }}
-          private_key: ${{ secrets.BHOM_APP_PRIVATE_KEY }}
-
-  ci-dataset-compliance:
-    runs-on: windows-2025-vs2026
-    timeout-minutes: 20
-    permissions:
-      contents: read
-      pull-requests: read
-      actions: write
-    steps:
-      - name: Run dataset compliance
-        uses: BuroHappoldEngineeringAdmin/CI_Toolkit/.github/actions/ci-compliance@develop
-        with:
-          check_type: dataset
-          patterns: '**/*[Dd]atasets*/**/*.json **/*[Dd]atasets*.json'
-          app_id: ${{ secrets.BHOM_APP_ID }}
-          private_key: ${{ secrets.BHOM_APP_PRIVATE_KEY }}
-
-  ci-documentation-compliance:
-    runs-on: windows-2025-vs2026
-    timeout-minutes: 20
-    permissions:
-      contents: read
-      pull-requests: read
-      actions: write
-    steps:
-      - name: Run documentation compliance
-        uses: BuroHappoldEngineeringAdmin/CI_Toolkit/.github/actions/ci-compliance@develop
-        with:
-          check_type: documentation
-          patterns: '*.cs'
-          app_id: ${{ secrets.BHOM_APP_ID }}
-          private_key: ${{ secrets.BHOM_APP_PRIVATE_KEY }}
-
-  ci-project-compliance:
-    runs-on: windows-2025-vs2026
-    timeout-minutes: 20
-    permissions:
-      contents: read
-      pull-requests: read
-      actions: write
-    steps:
-      - name: Run project compliance
-        uses: BuroHappoldEngineeringAdmin/CI_Toolkit/.github/actions/ci-compliance@develop
-        with:
-          check_type: project
-          patterns: 'AssemblyInfo.cs *.csproj'
-          app_id: ${{ secrets.BHOM_APP_ID }}
-          private_key: ${{ secrets.BHOM_APP_PRIVATE_KEY }}
-
-  ci-dataset-tests:
-    runs-on: windows-2025-vs2026
-    timeout-minutes: 30
-    steps:
-      - name: Run dataset tests
-        uses: BuroHappoldEngineeringAdmin/CI_Toolkit/.github/actions/ci-dataset-tests@develop
-        with:
-          app_id: ${{ secrets.BHOM_APP_ID }}
-          private_key: ${{ secrets.BHOM_APP_PRIVATE_KEY }}
-
-  ci-serialisation:
-    runs-on: windows-2025-vs2026
-    timeout-minutes: 90
-    steps:
-      - name: Run serialisation
-        uses: BuroHappoldEngineeringAdmin/CI_Toolkit/.github/actions/ci-serialisation@develop
-        with:
-          app_id: ${{ secrets.BHOM_APP_ID }}
-          private_key: ${{ secrets.BHOM_APP_PRIVATE_KEY }}
-          base_ref: ${{ github.base_ref }}
-
-  ci-versioning:
-    runs-on: windows-2025-vs2026
-    timeout-minutes: 90
-    steps:
-      - name: Run versioning
-        uses: BuroHappoldEngineeringAdmin/CI_Toolkit/.github/actions/ci-versioning@develop
-        with:
-          app_id: ${{ secrets.BHOM_APP_ID }}
-          private_key: ${{ secrets.BHOM_APP_PRIVATE_KEY }}
diff --git a/.github/workflows/validate-altconfig.yml b/.github/workflows/validate-altconfig.yml
new file mode 100644
index 000000000..5fec53675
--- /dev/null
+++ b/.github/workflows/validate-altconfig.yml
@@ -0,0 +1,16 @@
+# Sandbox validation harness for the alt-config widening of the versioning subject set.
+# Other workflows are removed on this branch so only the check under test runs.
+name: Validate altConfig widening
+
+on:
+  pull_request:
+
+jobs:
+  ci-versioning:
+    runs-on: windows-latest
+    timeout-minutes: 90
+    steps:
+      - name: Run versioning
+        uses: BuroHappoldEngineeringSandbox/CI_Toolkit/.github/actions/ci-versioning@validate/altconfig-widening
+        with:
+          fallback_token: ${{ github.token }}
diff --git a/Revit_Engine/Query/Discipline.cs b/Revit_Engine/Query/Discipline.cs
index 66eca4bb2..44b926a68 100644
--- a/Revit_Engine/Query/Discipline.cs
+++ b/Revit_Engine/Query/Discipline.cs
@@ -109,3 +109,4 @@ public static Discipline Discipline(this Type type)
 
 
 
+