diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c862c243..6664b63c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -142,6 +142,29 @@ jobs:
       - name: Switch CI workflow content gate
         run: luajit tests/switch_ci_workflows_test.lua
 
+  switch-build:
+    name: Switch fused build
+    needs: switch-changes
+    if: needs.switch-changes.outputs.changed == 'true' && github.repository == 'bryanthaboi/gen1recomp'
+    runs-on: ["self-hosted", "macOS"]
+    steps:
+      - uses: actions/checkout@v7
+      - name: Build Switch fused NRO
+        run: |
+          set -euo pipefail
+          VER="$(printf '%s' "$GITHUB_SHA" | cut -c1-7)"
+          scripts/build_switch.sh --fetch --fused --version "$VER"
+          echo "SWITCH_VER=$VER" >> "$GITHUB_ENV"
+      - name: upload Switch NRO artifact
+        uses: actions/upload-artifact@v7
+        with:
+          name: gen1recomp-switch-nro
+          path: |
+            dist/switch/gen1recomp-${{ env.SWITCH_VER }}-switch.nro
+            dist/switch/gen1recomp-${{ env.SWITCH_VER }}-switch.nro.sha256
+          if-no-files-found: error
+          retention-days: 7
+
   headless:
     name: headless suites (no ROM)
     runs-on: ubuntu-latest
diff --git a/tests/switch_ci_workflows_test.lua b/tests/switch_ci_workflows_test.lua
index 36227d2c..0de74a5b 100644
--- a/tests/switch_ci_workflows_test.lua
+++ b/tests/switch_ci_workflows_test.lua
@@ -57,6 +57,33 @@ do
   mustContain(block, "tests/switch_ci_workflows_test.lua", "switch-selftest")
 end
 
+-- --- SWCI-04 / SWCI-05: canonical fused build + artifact ---
+mustContain(ci, "switch-build:", "ci.yml")
+mustContain(ci, "gen1recomp-switch-nro", "ci.yml")
+mustContain(ci, "github.repository == 'bryanthaboi/gen1recomp'", "ci.yml canonical gate")
+mustContain(ci, 'runs-on: ["self-hosted", "macOS"]', "ci.yml switch-build runner")
+mustContain(ci, "scripts/build_switch.sh --fetch --fused", "ci.yml fused command")
+mustContain(ci, "if-no-files-found: error", "ci.yml artifact")
+mustContain(ci, "retention-days: 7", "ci.yml artifact retention")
+do
+  local start = ci:find("switch-build:", 1, true)
+  check(start ~= nil, "switch-build job present")
+  local rest = ci:sub(start)
+  local nextJob = rest:find("\n  [%w_-]+:", 2)
+  local block = nextJob and rest:sub(1, nextJob - 1) or rest
+  mustContain(block, "needs.switch-changes.outputs.changed == 'true'", "switch-build")
+  mustContain(block, "bryanthaboi/gen1recomp", "switch-build canonical")
+  mustContain(block, '["self-hosted", "macOS"]', "switch-build runner")
+  mustContain(block, "gen1recomp-switch-nro", "switch-build artifact name")
+  mustContain(block, "gen1recomp-${{ env.SWITCH_VER }}-switch.nro", "switch-build explicit fused path")
+  mustContain(block, "if-no-files-found: error", "switch-build")
+  mustContain(block, "retention-days: 7", "switch-build")
+  -- Forks must not run fused: canonical repo guard is required on the job if
+  check(block:find("bryanthaboi/gen1recomp", 1, true) ~= nil
+    and block:find("changed == 'true'", 1, true) ~= nil,
+    "switch-build requires changed=true AND canonical repository")
+end
+
 -- --- SWCI-08: release Switch hard-fail (no continue-on-error on build/stage) ---
 do
   local start = release:find("- name: Build Switch", 1, true)