diff --git a/.solstice/workflow.kdl b/.solstice/workflow.kdl
new file mode 100644
index 0000000..3990995
--- /dev/null
+++ b/.solstice/workflow.kdl
@@ -0,0 +1,17 @@
+workflow name="Solstice CI for solstice-ci" {
+  // Linux build and test on Ubuntu 22.04 runner
+  job id="linux-build" runs_on="ubuntu-22.04" {
+    step name="Show toolchain" run="rustc -Vv && cargo -V"
+    step name="Format"        run="cargo fmt --check"
+    step name="Clippy"        run="cargo clippy --workspace --all-targets --all-features -- -D warnings"
+    step name="Build"         run="cargo build --workspace"
+    step name="Test"          run="cargo test --workspace --all-targets"
+  }
+
+  // Illumos build (bhyve zone). Keep steps minimal; clippy/format may vary per toolchain.
+  job id="illumos-build" runs_on="illumos-latest" {
+    step name="Show toolchain" run="rustc -Vv && cargo -V"
+    step name="Build"          run="cargo build --workspace"
+    step name="Test"           run="cargo test --workspace --all-targets"
+  }
+}