fix: externalize ws and Node.js builtins from plugin bundle

The bundled ws library uses Node.js http/https/net modules which are
incompatible with Bun's runtime. When ws is bundled, it uses __require
polyfill instead of Bun's native ws polyfill, causing WebSocket upgrade
errors (Unexpected server response: 101).

By marking ws and Node.js builtins as external in tsup, they will be
resolved at runtime by Bun's compatibility layer. @slack/* packages
remain bundled to avoid the CJS/ESM interop issue.

Signed-off-by: xuezhaojun <xuezhaokeepgoing@gmail.com>

Author: xuezhaojun

opencode-slack-plugin/package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@kubeopencode/opencode-slack-plugin",
-  "version": "0.1.6",
+  "version": "0.1.7",
   "type": "module",
   "license": "MIT",
   "description": "OpenCode plugin that connects to Slack via Socket Mode — zero port exposure, runs inside your OpenCode process",
@@ -30,15 +30,16 @@
     "dist"
   ],
   "scripts": {
-    "build": "tsup src/index.ts --format esm --dts --clean",
+    "build": "tsup",
     "typecheck": "tsc --noEmit",
-    "dev": "tsup src/index.ts --format esm --dts --watch"
+    "dev": "tsup --watch"
+  },
+  "dependencies": {
+    "@slack/socket-mode": "^2.0.5",
+    "@slack/web-api": "^7.13.0"
   },
-  "dependencies": {},
   "devDependencies": {
     "@opencode-ai/plugin": "^1.2.15",
-    "@slack/socket-mode": "^2.0.5",
-    "@slack/web-api": "^7.13.0",
     "@types/node": "^22.0.0",
     "tsup": "^8.5.0",
     "typescript": "^5.9.0"

opencode-slack-plugin/package.json

@@ -0,0 +1,28 @@
+import { defineConfig } from "tsup"
+
+export default defineConfig({
+  entry: ["src/index.ts"],
+  format: ["esm"],
+  dts: true,
+  clean: true,
+  noExternal: [
+    "@slack/web-api",
+    "@slack/socket-mode",
+    "@slack/types",
+    "@slack/logger",
+  ],
+  external: [
+    "ws",
+    "http",
+    "https",
+    "net",
+    "tls",
+    "crypto",
+    "stream",
+    "events",
+    "url",
+    "zlib",
+    "bufferutil",
+    "utf-8-validate",
+  ],
+})