Typecheck experiment in CI; drop the pre-push hook

.github/workflows/experiment-tests.yml

@@ -0,0 +1,45 @@
+name: Experiment Tests
+
+# Runs on every PR to main (and pushes to main) that touch the experiment app, so
+# a broken change is caught here rather than by the post-merge image build.
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'experiment/**'
+      - '.github/workflows/experiment-tests.yml'
+  pull_request:
+    branches:
+      - main
+    paths:
+      - 'experiment/**'
+      - '.github/workflows/experiment-tests.yml'
+  workflow_dispatch:
+
+# Least privilege: these jobs only need to read the repo to check it out.
+permissions:
+  contents: read
+
+defaults:
+  run:
+    working-directory: experiment
+
+jobs:
+  unit:
+    name: Unit tests (Vitest)
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v7
+      - uses: actions/setup-node@v7
+        with:
+          node-version: lts/*
+          cache: npm
+          cache-dependency-path: experiment/package-lock.json
+      - name: Install dependencies
+        run: npm ci
+      - name: Typecheck
+        run: npm run typecheck
+      # `npm test` is watch mode in this package; test:run is the one-shot script.
+      - name: Run unit tests
+        run: npm run test:run

package.json

@@ -2,11 +2,5 @@
   "name": "writing-tools",
   "version": "1.0.0",
   "private": true,
-  "description": "Writing tools monorepo",
-  "scripts": {
-    "prepare": "husky"
-  },
-  "devDependencies": {
-    "husky": "^9.0.0"
-  }
+  "description": "Writing tools monorepo. No root build: each app (frontend, backend, experiment) has its own package.json."
 }