diff --git a/.github/workflows/demo.yml b/.github/workflows/demo.yml
new file mode 100644
index 0000000..71d1a92
--- /dev/null
+++ b/.github/workflows/demo.yml
@@ -0,0 +1,145 @@
+name: Checks & deploy
+run-name: Fmt, lint, test, build, & deploy to gh-pages
+on: [push]
+jobs:
+  fmt:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v4
+      - name: Install tools from asdf config
+        uses: ai/asdf-cache-action@v1
+      - name: Cache Clojure dependencies
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/.m2/repository
+          # List all files containing dependencies:
+          key: cljdeps-${{ hashFiles('deps.edn') }}
+          restore-keys: cljdeps-
+      - name: Get yarn cache directory path
+        id: yarn-cache-dir-path
+        run: echo "dir=$(yarn cache dir)" >> $GITHUB_OUTPUT
+      - name: Cache yarn dependencies
+        uses: actions/cache@v3
+        id: yarn-cache # use this to check for `cache-hit` (`steps.yarn-cache.outputs.cache-hit != 'true'`)
+        with:
+          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
+          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-yarn-
+      - name: Run formatter
+        run: yarn check-fmt
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v4
+      - name: Install tools from asdf config
+        uses: ai/asdf-cache-action@v1
+      - name: Cache Clojure dependencies
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/.m2/repository
+          # List all files containing dependencies:
+          key: cljdeps-${{ hashFiles('deps.edn') }}
+          restore-keys: cljdeps-
+      - name: Get yarn cache directory path
+        id: yarn-cache-dir-path
+        run: echo "dir=$(yarn cache dir)" >> $GITHUB_OUTPUT
+      - name: Cache yarn dependencies
+        uses: actions/cache@v3
+        id: yarn-cache # use this to check for `cache-hit` (`steps.yarn-cache.outputs.cache-hit != 'true'`)
+        with:
+          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
+          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-yarn-
+      - name: Run linter
+        run: yarn lint
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v4
+      - name: Install tools from asdf config
+        uses: ai/asdf-cache-action@v1
+      - name: Cache Clojure dependencies
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/.m2/repository
+          # List all files containing dependencies:
+          key: cljdeps-${{ hashFiles('deps.edn') }}
+          restore-keys: cljdeps-
+      - name: Get yarn cache directory path
+        id: yarn-cache-dir-path
+        run: echo "dir=$(yarn cache dir)" >> $GITHUB_OUTPUT
+      - name: Cache yarn dependencies
+        uses: actions/cache@v3
+        id: yarn-cache # use this to check for `cache-hit` (`steps.yarn-cache.outputs.cache-hit != 'true'`)
+        with:
+          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
+          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-yarn-
+      - name: Install npm deps
+        run: yarn install --frozen-lockfile
+      - name: Run tests
+        run: yarn test
+  build:
+    runs-on: ubuntu-latest
+    needs: [fmt, lint, test]
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v4
+      - name: Install tools from asdf config
+        uses: ai/asdf-cache-action@v1
+      - name: Cache Clojure dependencies
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/.m2/repository
+          # List all files containing dependencies:
+          key: cljdeps-${{ hashFiles('deps.edn') }}
+          restore-keys: cljdeps-
+      - name: Get yarn cache directory path
+        id: yarn-cache-dir-path
+        run: echo "dir=$(yarn cache dir)" >> $GITHUB_OUTPUT
+      - name: Cache yarn dependencies
+        uses: actions/cache@v3
+        id: yarn-cache # use this to check for `cache-hit` (`steps.yarn-cache.outputs.cache-hit != 'true'`)
+        with:
+          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
+          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-yarn-
+      - name: Install npm deps
+        run: yarn install --frozen-lockfile
+      - name: Build js
+        run: yarn build-cljs
+      - name: Build css
+        run: yarn build-stylus
+      - name: Upload assets
+        uses: actions/upload-artifact@v3
+        with:
+          name: github-pages
+          path: public
+
+  deploy:
+    runs-on: ubuntu-latest
+    needs: build
+    permissions:
+      pages: write
+      id-token: write
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    steps:
+      - name: Download artifacts
+        uses: actions/download-artifact@v3
+      - run: ls
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v2
diff --git a/.tool-versions b/.tool-versions
new file mode 100644
index 0000000..b71589d
--- /dev/null
+++ b/.tool-versions
@@ -0,0 +1,3 @@
+clojure 1.11.1.1257
+java openjdk-18.0.2.1
+nodejs 18.12.1
diff --git a/package.json b/package.json
index 9879004..8a8ea80 100644
--- a/package.json
+++ b/package.json
@@ -1,10 +1,13 @@
 {
   "scripts": {
     "fmt": "clojure -M:nsorg-fix src test && clojure -M:cljfmt-fix src *.edn test",
+    "check-fmt": "clojure -M:nsorg-check src test && clojure -M:cljfmt-check src *.edn test",
     "lint": "clojure -M:lint",
     "test": "shadow-cljs compile test",
     "watch-cljs": "shadow-cljs watch app",
+    "build-cljs": "shadow-cljs compile app",
     "watch-stylus": "stylus --include-css -c -I src -I node_modules -o public/signals.css -w -m src/signals/signals.styl",
+    "build-stylus": "stylus --include-css -c -I src -I node_modules -o public/signals.css -m src/signals/signals.styl",
     "watch-test": "shadow-cljs watch test"
   },
   "devDependencies": {