diff --git a/.github/workflows/cache-warm.yml b/.github/workflows/cache-warm.yml
new file mode 100644
index 0000000..5d4212a
--- /dev/null
+++ b/.github/workflows/cache-warm.yml
@@ -0,0 +1,46 @@
+name: Cache Warm
+
+on:
+  push:
+    branches: [main]
+
+concurrency:
+  group: cache-warm-${{ github.ref }}
+  cancel-in-progress: false
+
+env:
+  ZIG_VERSION: '0.15.2'
+
+jobs:
+  warm-ghostty:
+    name: Warm Ghostty Cache
+    runs-on: macos-15
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+
+      - uses: maxim-lobanov/setup-xcode@v1
+        with:
+          xcode-version: "16"
+
+      - uses: mlugg/setup-zig@v2
+        with:
+          version: ${{ env.ZIG_VERSION }}
+
+      - name: Get Ghostty submodule SHA
+        id: ghostty-sha
+        run: echo "sha=$(git -C vendor/ghostty rev-parse HEAD)" >> "$GITHUB_OUTPUT"
+
+      - name: Cache Ghostty framework
+        id: ghostty-cache
+        uses: actions/cache@v4
+        with:
+          path: Frameworks
+          key: ghostty-${{ runner.os }}-${{ runner.arch }}-${{ steps.ghostty-sha.outputs.sha }}
+
+      - name: Build Ghostty
+        if: steps.ghostty-cache.outputs.cache-hit != 'true'
+        run: |
+          unset ZIG_LOCAL_CACHE_DIR ZIG_GLOBAL_CACHE_DIR
+          make ghostty