Add GHA to check npm test and package and update package-lock file

.github/workflows/ci.yml

@@ -0,0 +1,48 @@
+name: CI
+
+on:
+  pull_request:
+    branches:
+      - main
+      - 'v*.*.*'
+
+concurrency:
+  group: ci-${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+permissions: {}
+
+jobs:
+  ci:
+    name: test and package
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+    permissions:
+      contents: read
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '24'
+          cache: 'npm'
+
+      - run: npm ci
+
+      - name: Run tests
+        run: npm test
+
+      - name: Build VSIX
+        id: build
+        run: |
+          set -euo pipefail
+          PACKAGE_NAME=$(node -p "require('./package.json').name")
+          PACKAGE_VERSION=$(node -p "require('./package.json').version")
+          VSIX="${PACKAGE_NAME}-${PACKAGE_VERSION}.vsix"
+          npm run package
+          if [ ! -f "$VSIX" ]; then
+            echo "::error::Build succeeded but expected VSIX '$VSIX' was not produced"
+            ls -1 *.vsix 2>/dev/null || true
+            exit 1
+          fi
+          echo "Built $VSIX"

eslint.config.mjs

@@ -4,7 +4,7 @@ import tseslint from 'typescript-eslint';
 import unusedImports from 'eslint-plugin-unused-imports';
 import simpleImportSort from 'eslint-plugin-simple-import-sort';
 
-export default [
+export default tseslint.config(
   {
     ignores: [
       'out/',
@@ -23,6 +23,15 @@ export default [
   },
   js.configs.recommended,
   ...tseslint.configs.recommendedTypeChecked,
+  // Jest mocks (and any other JS under src/) are not in the TS program.
+  {
+    files: ['**/*.js'],
+    extends: [tseslint.configs.disableTypeChecked],
+    languageOptions: {
+      sourceType: 'commonjs',
+      globals: globals.node,
+    },
+  },
   {
     files: ['**/*.ts', '**/*.tsx'],
     plugins: {
@@ -135,4 +144,4 @@ export default [
       '@typescript-eslint/no-non-null-assertion': 'off',
     },
   },
-];
+);