diff --git a/mise.toml b/mise.toml
new file mode 100644
index 0000000..cb5ad81
--- /dev/null
+++ b/mise.toml
@@ -0,0 +1,5 @@
+[tools]
+pnpm = "11.5.0"
+
+[settings]
+idiomatic_version_file_enable_tools = ["node"]
diff --git a/pnpm-workspace.yaml b/pnpm-workspace.yaml
new file mode 100644
index 0000000..220bd0b
--- /dev/null
+++ b/pnpm-workspace.yaml
@@ -0,0 +1,3 @@
+allowBuilds:
+  esbuild: true
+  msw: true
diff --git a/tsdown.config.ts b/tsdown.config.ts
new file mode 100644
index 0000000..b4adeef
--- /dev/null
+++ b/tsdown.config.ts
@@ -0,0 +1,9 @@
+import { defineConfig } from "tsdown";
+
+export default defineConfig({
+  entry: ["./src/index.ts"],
+  format: "esm",
+  dts: true,
+  sourcemap: true,
+  clean: true,
+});
diff --git a/vitest.config.ts b/vitest.config.ts
new file mode 100644
index 0000000..1ff6bed
--- /dev/null
+++ b/vitest.config.ts
@@ -0,0 +1,31 @@
+import { defineConfig } from "vitest/config";
+import { playwright } from "@vitest/browser-playwright";
+
+export default defineConfig({
+  test: {
+    projects: [
+      {
+        test: {
+          name: "Node",
+          environment: "node",
+        },
+      },
+      {
+        test: {
+          name: "Browsers",
+          browser: {
+            enabled: true,
+            headless: true,
+            provider: playwright(),
+            // https://vitest.dev/config/browser/playwright
+            instances: [
+              { browser: "chromium" },
+              { browser: "firefox" },
+              { browser: "webkit" },
+            ],
+          },
+        },
+      },
+    ],
+  },
+});