diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b655f8f..25f480e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -158,6 +158,25 @@ jobs:
           push: false
           archive: false
 
+  # ---------------------------------------------------------------------------
+  # arcup installer: shell lint + unit tests (standalone, no deps)
+  # ---------------------------------------------------------------------------
+
+  arcup:
+    name: Arcup Installer
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+
+      - name: Install system dependencies
+        run: sudo apt-get update && sudo apt-get install -y --no-install-recommends shellcheck
+
+      - name: Run shellcheck
+        run: shellcheck arcup/arcup arcup/install
+
+      - name: Run arcup shell tests
+        run: make test-arcup
+
   # ---------------------------------------------------------------------------
   # Solidity Contracts: lint (fast) -> build -> test
   # ---------------------------------------------------------------------------
diff --git a/Makefile b/Makefile
index f7c4892..ec0ffd9 100644
--- a/Makefile
+++ b/Makefile
@@ -136,8 +136,17 @@ test-it: up ## Run integration tests
 	cargo install cargo-nextest --locked
 	cargo nextest run $(UNIT_TEST_ARGS) --features integration
 
+.PHONY: test-arcup
+test-arcup: ## Run arcup installer shell tests
+	@echo running arcup installer tests...
+	@for suite in arcup/test_*.sh arcup/*_test.sh; do \
+		[ -f "$$suite" ] || continue; \
+		echo "--- $$suite"; \
+		bash "$$suite" || exit 1; \
+	done
+
 .PHONY: test-all
-test-all: test-it test-unit-contract ## Run all tests
+test-all: test-it test-unit-contract test-arcup ## Run all tests
 	@echo running all tests...
 	make smoke LAUNCH_ARGS="--frozen --healthy-retry=130"