diff --git a/.buildkite/pipeline.yml b/.buildkite/pipeline.yml
new file mode 100644
index 0000000..20bacdb
--- /dev/null
+++ b/.buildkite/pipeline.yml
@@ -0,0 +1,43 @@
+env:
+  JULIA_NUM_THREADS: auto
+
+steps:
+  - label: "QuantumInterface Tests - {{matrix.LABEL}}"
+    plugins:
+      - JuliaCI/julia#v1:
+          version: "1"
+      - JuliaCI/julia-test#v1:
+      - JuliaCI/julia-coverage#v1:
+          codecov: true
+    command:
+      - echo "Julia depot path $${JULIA_DEPOT_PATH}"
+    env:
+      JET_TEST: "{{matrix.JET_TEST}}"
+    agents:
+      queue: "{{matrix.QUEUE}}"
+    matrix:
+      setup:
+        LABEL: ["base tests"]
+        QUEUE: ["default"]
+        JET_TEST: ["false"]
+      adjustments:
+        - with:
+            LABEL: "JET"
+            QUEUE: default
+            JET_TEST: true
+
+  - label: "Downstream Tests - {{matrix.PACKAGE}}"
+    plugins:
+      - JuliaCI/julia#v1:
+          version: "1"
+    command:
+      - echo "Julia depot path $${JULIA_DEPOT_PATH}"
+      - julia --project=$(mktemp -d) -e '
+        using Pkg;
+        pkg"dev .";
+        Pkg.add("{{matrix.PACKAGE}}");
+        Pkg.build("{{matrix.PACKAGE}}");
+        Pkg.test("{{matrix.PACKAGE}}");'
+    matrix:
+      setup:
+        PACKAGE: ["QuantumOpticsBase", "QuantumOptics", "QuantumSymbolics", "QuantumClifford", "QuantumSavory"]
\ No newline at end of file
diff --git a/.github/workflows/breakage.yml b/.github/workflows/breakage.yml
deleted file mode 100644
index e2a44de..0000000
--- a/.github/workflows/breakage.yml
+++ /dev/null
@@ -1,70 +0,0 @@
-# Ref: https://securitylab.github.com/research/github-actions-preventing-pwn-requests
-# and: https://github.com/JuliaSmoothOptimizers/NLPModels.jl/blob/main/.github/workflows/breakage.yml
-name: Breakage
-
-# read-only repo token
-# no access to secrets
-on:
-  pull_request:
-  workflow_dispatch:
-
-jobs:
-  break:
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        pkg: [
-          "qojulia/QuantumOpticsBase.jl",
-          "qojulia/QuantumOptics.jl",
-          "QuantumSavory/QuantumSymbolics.jl",
-          "QuantumSavory/QuantumClifford.jl",
-          "QuantumSavory/QuantumSavory.jl",
-        ]
-        pkgversion: [latest]
-
-    steps:
-      - uses: actions/checkout@v6
-
-      # Install Julia
-      - uses: julia-actions/setup-julia@v2
-        with:
-          version: 1
-          arch: x64
-      - uses: actions/cache@v3
-        env:
-          cache-name: cache-artifacts
-        with:
-          path: ~/.julia/artifacts
-          key: ${{ runner.os }}-test-${{ env.cache-name }}-${{ hashFiles('**/Project.toml') }}
-          restore-keys: |
-            ${{ runner.os }}-test-${{ env.cache-name }}-
-            ${{ runner.os }}-test-
-            ${{ runner.os }}-
-      - uses: julia-actions/julia-buildpkg@v1
-
-      # Breakage test
-      - name: 'Breakage of ${{ matrix.pkg }}, ${{ matrix.pkgversion }} version'
-        env:
-          URL: ${{ matrix.pkg }}
-          VERSION: ${{ matrix.pkgversion }}
-        run: |
-          set -v
-          mkdir -p ./pr
-          echo "${{ github.event.number }}" > ./pr/NR
-          git clone https://github.com/$URL
-          export PKG=$(echo $URL | cut -f2 -d/)
-          cd $PKG
-          TAG=$VERSION
-          export TAG
-          julia -e 'using Pkg;
-            PKG, TAG, VERSION = ENV["PKG"], ENV["TAG"], ENV["VERSION"]
-            joburl = joinpath(ENV["GITHUB_SERVER_URL"], ENV["GITHUB_REPOSITORY"], "actions/runs", ENV["GITHUB_RUN_ID"])
-            open("../pr/$PKG-$VERSION", "w") do io
-                TAG == "no_tag" && error("No tag for $VERSION")
-                pkg"activate .";
-                pkg"instantiate";
-                pkg"dev ../";
-                pkg"build";
-                pkg"test";
-            end'
diff --git a/.github/workflows/ci-julia-nightly.yml b/.github/workflows/ci-julia-nightly.yml
index f69518f..d40a0a5 100644
--- a/.github/workflows/ci-julia-nightly.yml
+++ b/.github/workflows/ci-julia-nightly.yml
@@ -18,12 +18,6 @@ jobs:
             arch: x64
             version: alpha
             threads: 2
-            jet: 'false'
-          - os: ubuntu-latest
-            arch: x64
-            version: '1'
-            threads: 2
-            jet: 'true'
     steps:
       - uses: actions/checkout@v6
       - uses: julia-actions/install-juliaup@v2
@@ -34,7 +28,6 @@ jobs:
       - uses: julia-actions/julia-runtest@v1
         env:
           JULIA_NUM_THREADS: ${{ matrix.threads }}
-          JET_TEST: ${{ matrix.jet }}
       - uses: julia-actions/julia-processcoverage@v1
       - uses: codecov/codecov-action@v5
         with: