Improve CI times/caching.

Author: joshwilsonvu

.github/workflows/ci.yml

@@ -1,11 +1,9 @@
 name: CI
 on:
   push:
-    branches-ignore:
-      - reactivity-v2
+    branches: ["main"]
   pull_request:
-    branches:
-      - main
+    types: [opened, synchronize]
 jobs:
   build:
     name: Build
@@ -15,15 +13,18 @@ jobs:
         node: ["18", "20", "22"]
     steps:
       - uses: actions/checkout@v4
-      - name: Setup pnpm
-        uses: pnpm/action-setup@v3
-        with:
-          version: 9
       - uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node }}
           cache: "pnpm"
-      - name: Install dependencies
-        run: pnpm install --frozen-lockfile
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+      - name: Cache turbo setup
+        uses: actions/cache@v4
+        with:
+          path: .turbo
+          key: ${{ runner.os }}-turbo-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-turbo-
       - name: Run CI with turbo
         run: pnpm run ci

turbo.json

@@ -1,4 +1,5 @@
 {
+  "$schema": "https://turbo.build/schema.json",
   "tasks": {
     "turbo:build": {
       "dependsOn": ["^turbo:build"],