build w/ bun to avoid internal deps hell

build.esbuild.ts

@@ -0,0 +1,30 @@
+#!/usr/bin/env tsx
+import { execSync } from "child_process";
+import * as esbuild from "esbuild";
+
+// Run TypeScript compiler for type declarations
+execSync("tsc", { stdio: "inherit" });
+
+const isDevelopment = process.env.NODE_ENV === "development";
+
+// Build all JavaScript/TypeScript files
+async function buildJs(
+  entrypoint: string,
+  opts: { outdir?: string; target?: "browser" | "node" } = {},
+) {
+  return esbuild.build({
+    entryPoints: [entrypoint],
+    outdir: opts.outdir ?? "dist",
+    platform: opts.target === "node" ? "node" : "browser",
+    format: "esm",
+    bundle: true,
+    minify: !isDevelopment,
+    sourcemap: isDevelopment ? "inline" : false,
+  });
+}
+
+await Promise.all([
+  buildJs("src/app.ts", { outdir: "dist/src" }),
+  buildJs("src/app-bridge.ts", { outdir: "dist/src" }),
+  buildJs("src/react/index.tsx", { outdir: "dist/src/react" }),
+]);