diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..84280cd
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,20 @@
+# Checks every pull request and every push to main: formatting, a build for each desktop OS, the
+# build's `test` step if it has one, and (never failing the run) a build against fizzy main.
+name: CI
+on:
+  push:
+    branches: [main]
+  pull_request:
+  workflow_dispatch:
+
+concurrency:
+  group: ci-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  check:
+    uses: fizzyedit/plugin-build-action/.github/workflows/check.yml@v7
+    with:
+      zig-version: "0.16.0"
+    # secrets:
+    #   build_env: ${{ secrets.MY_BUILD_ENV }}   # as in release.yml, if the build needs one
diff --git a/bridge/main.zig b/bridge/main.zig
index 9746f54..8123f29 100644
--- a/bridge/main.zig
+++ b/bridge/main.zig
@@ -589,7 +589,7 @@ pub const Bridge = struct {
         const b64 = try arena.alloc(u8, std.base64.standard.Encoder.calcSize(png.len));
         _ = std.base64.standard.Encoder.encode(b64, png);
         const note = try std.fmt.allocPrint(arena, "{s}\n{d}x{d} (from {d}x{d}); fizzy {d} ms, here {d} ms, {d} KiB", .{
-            path,                       size.w,                     size.h, cw, ch,
+            path,                           size.w,                         size.h,         cw, ch,
             (t1 - t0) / std.time.ns_per_ms, (t2 - t1) / std.time.ns_per_ms, png.len / 1024,
         });
         return reply(out, id, .{ .result = .{