chore: switch tsup to tsdown

package.json

@@ -22,6 +22,7 @@
     "husky": "^9.1.7",
     "lint-staged": "^15.5.0",
     "prettier": "^3.5.3",
+    "tsdown": "^0.8.1",
     "turbo": "^2.5.0",
     "vite-tsconfig-paths": "^5.1.4",
     "vitest": "^3.0.8"

packages/core/package.json

@@ -6,17 +6,13 @@
   "main": "dist/index.cjs",
   "types": "dist/index.d.ts",
   "module": "dist/index.js",
-  "browser": "dist/index.browser.js",
+  "browser": "dist/browser/index.browser.js",
   "exports": {
     ".": {
-      "workerd": {
+      "import": {
         "types": "./dist/index.d.ts",
         "default": "./dist/index.js"
       },
-      "edge-light": {
-        "types": "./dist/index.d.ts",
-        "default": "./dist/index.serverless.js"
-      },
       "require": {
         "types": "./dist/index.d.cts",
         "default": "./dist/index.cjs"
@@ -31,6 +27,10 @@
         "types": "./async-context/index.d.ts",
         "default": "./async-context/index.browser.js"
       },
+      "import": {
+        "types": "./async-context/index.d.ts",
+        "default": "./async-context/index.js"
+      },
       "require": {
         "types": "./async-context/index.d.cts",
         "default": "./async-context/index.cjs"
@@ -102,8 +102,8 @@
     "stream"
   ],
   "scripts": {
-    "build": "rimraf dist interrupter middleware stream util async-context && tsup",
-    "dev": "tsup --watch",
+    "build": "rimraf dist interrupter middleware stream util async-context && tsdown",
+    "dev": "tsdown --watch",
     "test": "vitest run",
     "test:ui": "vitest --ui",
     "prepublishOnly": "cp ../../README.md ./README.md"
@@ -116,7 +116,7 @@
     "p-retry": "^6.2.1",
     "rimraf": "^6.0.1",
     "stream-chain": "^3.4.0",
-    "tsup": "^8.4.0",
+    "tsdown": "^0.8.1",
     "typescript": "^5.8.2",
     "zod": "^3.24.2"
   },

packages/core/tsup.config.ts → packages/core/tsdown.config.ts

@@ -1,4 +1,4 @@
-import { defineConfig } from "tsup";
+import { defineConfig } from "tsdown";
 
 export default defineConfig([
   // Core APIs
@@ -14,14 +14,10 @@ export default defineConfig([
   // Core APIs - Browser ESM
   {
     entry: ["src/core/index.ts"],
-    outDir: "dist",
-    outExtension: () => ({
-      js: ".browser.js",
-    }),
+    outDir: "dist/browser",
     tsconfig: "./tsconfig.browser.build.json",
     platform: "browser",
     format: ["esm"],
-    minify: true,
     sourcemap: true,
   },
   // Async Context APIs