chore: remove dependency on bun

README.md

···
 
 simple cli to fetch an anthropic access token using oauth (pkce), built with bun
 
-## install
-
-```bash
-bun install
-```
-
 ## usage
 
 ```bash
-# only works via bunx since it uses bun libraries
 bunx anthropic-api-key
+npx anthropic-api-key
 
 # override port
 PORT=9999 bunx anthropic-api-key

bun.lock

···
   "workspaces": {
     "": {
       "name": "anthropic-api-key",
+      "dependencies": {
+        "@types/express": "^5.0.3",
+        "express": "^5.1.0",
+        "net": "^1.0.2",
+        "node-fetch": "^3.3.2",
+        "open": "^10.2.0",
+      },
       "devDependencies": {
         "@types/bun": "latest",
-      },
-      "peerDependencies": {
         "typescript": "^5",
       },
     },
   },
   "packages": {
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+
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+
+    "@types/express-serve-static-core": ["@types/express-serve-static-core@5.0.7", "", { "dependencies": { "@types/node": "*", "@types/qs": "*", "@types/range-parser": "*", "@types/send": "*" } }, "sha512-R+33OsgWw7rOhD1emjU7dzCDHucJrgJXMA5PYCzJxVil0dsyx5iBEPHqpPfiKNJQb7lZ1vxwoLR4Z87bBUpeGQ=="],
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+
+    "body-parser": ["body-parser@2.2.0", "", { "dependencies": { "bytes": "^3.1.2", "content-type": "^1.0.5", "debug": "^4.4.0", "http-errors": "^2.0.0", "iconv-lite": "^0.6.3", "on-finished": "^2.4.1", "qs": "^6.14.0", "raw-body": "^3.0.0", "type-is": "^2.0.0" } }, "sha512-02qvAaxv8tp7fBa/mw1ga98OGm+eCbqzJOKoRt70sLmfEEi+jyBYVTDGfCL/k06/4EMk/z01gCe7HoCH/f2LTg=="],
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+
     "csstype": ["csstype@3.1.3", "", {}, "sha512-M1uQkMl8rQK/szD0LNhtqxIPLpimGm8sOBwU7lLnCpSbTyY3yeU1Vc7l4KT5zT4s/yOxHH5O7tIuuLOCnLADRw=="],
 
+    "data-uri-to-buffer": ["data-uri-to-buffer@4.0.1", "", {}, "sha512-0R9ikRb668HB7QDxT1vkpuUBtqc53YyAwMwGeUFKRojY/NWKvdZ+9UYtRfGmhqNbRkTSVpMbmyhXipFFv2cb/A=="],
+
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+
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+    "dunder-proto": ["dunder-proto@1.0.1", "", { "dependencies": { "call-bind-apply-helpers": "^1.0.1", "es-errors": "^1.3.0", "gopd": "^1.2.0" } }, "sha512-KIN/nDJBQRcXw0MLVhZE9iQHmG68qAVIBg9CqmUYjmQIhgij9U5MFvrqkUL5FbtyyzZuOeOt0zdeRe4UY7ct+A=="],
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+
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+    "es-errors": ["es-errors@1.3.0", "", {}, "sha512-Zf5H2Kxt2xjTvbJvP2ZWLEICxA6j+hAmMzIlypy4xcBg1vKVnx89Wy0GbS+kf5cwCVFFzdCFh2XSCFNULS6csw=="],
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+    "express": ["express@5.1.0", "", { "dependencies": { "accepts": "^2.0.0", "body-parser": "^2.2.0", "content-disposition": "^1.0.0", "content-type": "^1.0.5", "cookie": "^0.7.1", "cookie-signature": "^1.2.1", "debug": "^4.4.0", "encodeurl": "^2.0.0", "escape-html": "^1.0.3", "etag": "^1.8.1", "finalhandler": "^2.1.0", "fresh": "^2.0.0", "http-errors": "^2.0.0", "merge-descriptors": "^2.0.0", "mime-types": "^3.0.0", "on-finished": "^2.4.1", "once": "^1.4.0", "parseurl": "^1.3.3", "proxy-addr": "^2.0.7", "qs": "^6.14.0", "range-parser": "^1.2.1", "router": "^2.2.0", "send": "^1.1.0", "serve-static": "^2.2.0", "statuses": "^2.0.1", "type-is": "^2.0.1", "vary": "^1.1.2" } }, "sha512-DT9ck5YIRU+8GYzzU5kT3eHGA5iL+1Zd0EutOmTE9Dtk+Tvuzd23VBU+ec7HPNSTxXYO55gPV/hq4pSBJDjFpA=="],
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+    "net": ["net@1.0.2", "", {}, "sha512-kbhcj2SVVR4caaVnGLJKmlk2+f+oLkjqdKeQlmUtz6nGzOpbcobwVIeSURNgraV/v3tlmGIX82OcPCl0K6RbHQ=="],
+
+    "node-domexception": ["node-domexception@1.0.0", "", {}, "sha512-/jKZoMpw0F8GRwl4/eLROPA3cfcXtLApP0QzLmUT/HuPCZWyB7IY9ZrMeKw2O/nFIqPQB3PVM9aYm0F312AXDQ=="],
+
+    "node-fetch": ["node-fetch@3.3.2", "", { "dependencies": { "data-uri-to-buffer": "^4.0.0", "fetch-blob": "^3.1.4", "formdata-polyfill": "^4.0.10" } }, "sha512-dRB78srN/l6gqWulah9SrxeYnxeddIG30+GOqK/9OlLVyLg3HPnr6SqOWTWOXKRwC2eGYCkZ59NNuSgvSrpgOA=="],
+
+    "object-inspect": ["object-inspect@1.13.4", "", {}, "sha512-W67iLl4J2EXEGTbfeHCffrjDfitvLANg0UlX3wFUUSTx92KXRFegMHUVgSqE+wvhAbi4WqjGg9czysTV2Epbew=="],
+
+    "on-finished": ["on-finished@2.4.1", "", { "dependencies": { "ee-first": "1.1.1" } }, "sha512-oVlzkg3ENAhCk2zdv7IJwd/QUD4z2RxRwpkcGY8psCVcCYZNq4wYnVWALHM+brtuJjePWiYF/ClmuDr8Ch5+kg=="],
+
+    "once": ["once@1.4.0", "", { "dependencies": { "wrappy": "1" } }, "sha512-lNaJgI+2Q5URQBkccEKHTQOPaXdUxnZZElQTZY0MFUAuaEqe1E+Nyvgdz/aIyNi6Z9MzO5dv1H8n58/GELp3+w=="],
+
+    "open": ["open@10.2.0", "", { "dependencies": { "default-browser": "^5.2.1", "define-lazy-prop": "^3.0.0", "is-inside-container": "^1.0.0", "wsl-utils": "^0.1.0" } }, "sha512-YgBpdJHPyQ2UE5x+hlSXcnejzAvD0b22U2OuAP+8OnlJT+PjWPxtgmGqKKc+RgTM63U9gN0YzrYc71R2WT/hTA=="],
+
+    "parseurl": ["parseurl@1.3.3", "", {}, "sha512-CiyeOxFT/JZyN5m0z9PfXw4SCBJ6Sygz1Dpl0wqjlhDEGGBP1GnsUVEL0p63hoG1fcj3fHynXi9NYO4nWOL+qQ=="],
+
+    "path-to-regexp": ["path-to-regexp@8.2.0", "", {}, "sha512-TdrF7fW9Rphjq4RjrW0Kp2AW0Ahwu9sRGTkS6bvDi0SCwZlEZYmcfDbEsTz8RVk0EHIS/Vd1bv3JhG+1xZuAyQ=="],
+
+    "proxy-addr": ["proxy-addr@2.0.7", "", { "dependencies": { "forwarded": "0.2.0", "ipaddr.js": "1.9.1" } }, "sha512-llQsMLSUDUPT44jdrU/O37qlnifitDP+ZwrmmZcoSKyLKvtZxpyV0n2/bD/N4tBAAZ/gJEdZU7KMraoK1+XYAg=="],
+
+    "qs": ["qs@6.14.0", "", { "dependencies": { "side-channel": "^1.1.0" } }, "sha512-YWWTjgABSKcvs/nWBi9PycY/JiPJqOD4JA6o9Sej2AtvSGarXxKC3OQSk4pAarbdQlKAh5D4FCQkJNkW+GAn3w=="],
+
+    "range-parser": ["range-parser@1.2.1", "", {}, "sha512-Hrgsx+orqoygnmhFbKaHE6c296J+HTAQXoxEF6gNupROmmGJRoyzfG3ccAveqCBrwr/2yxQ5BVd/GTl5agOwSg=="],
+
+    "raw-body": ["raw-body@3.0.0", "", { "dependencies": { "bytes": "3.1.2", "http-errors": "2.0.0", "iconv-lite": "0.6.3", "unpipe": "1.0.0" } }, "sha512-RmkhL8CAyCRPXCE28MMH0z2PNWQBNk2Q09ZdxM9IOOXwxwZbN+qbWaatPkdkWIKL2ZVDImrN/pK5HTRz2PcS4g=="],
+
+    "router": ["router@2.2.0", "", { "dependencies": { "debug": "^4.4.0", "depd": "^2.0.0", "is-promise": "^4.0.0", "parseurl": "^1.3.3", "path-to-regexp": "^8.0.0" } }, "sha512-nLTrUKm2UyiL7rlhapu/Zl45FwNgkZGaCpZbIHajDYgwlJCOzLSk+cIPAnsEqV955GjILJnKbdQC1nVPz+gAYQ=="],
+
+    "run-applescript": ["run-applescript@7.0.0", "", {}, "sha512-9by4Ij99JUr/MCFBUkDKLWK3G9HVXmabKz9U5MlIAIuvuzkiOicRYs8XJLxX+xahD+mLiiCYDqF9dKAgtzKP1A=="],
+
+    "safe-buffer": ["safe-buffer@5.2.1", "", {}, "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ=="],
+
+    "safer-buffer": ["safer-buffer@2.1.2", "", {}, "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg=="],
+
+    "send": ["send@1.2.0", "", { "dependencies": { "debug": "^4.3.5", "encodeurl": "^2.0.0", "escape-html": "^1.0.3", "etag": "^1.8.1", "fresh": "^2.0.0", "http-errors": "^2.0.0", "mime-types": "^3.0.1", "ms": "^2.1.3", "on-finished": "^2.4.1", "range-parser": "^1.2.1", "statuses": "^2.0.1" } }, "sha512-uaW0WwXKpL9blXE2o0bRhoL2EGXIrZxQ2ZQ4mgcfoBxdFmQold+qWsD2jLrfZ0trjKL6vOw0j//eAwcALFjKSw=="],
+
+    "serve-static": ["serve-static@2.2.0", "", { "dependencies": { "encodeurl": "^2.0.0", "escape-html": "^1.0.3", "parseurl": "^1.3.3", "send": "^1.2.0" } }, "sha512-61g9pCh0Vnh7IutZjtLGGpTA355+OPn2TyDv/6ivP2h/AdAVX9azsoxmg2/M6nZeQZNYBEwIcsne1mJd9oQItQ=="],
+
+    "setprototypeof": ["setprototypeof@1.2.0", "", {}, "sha512-E5LDX7Wrp85Kil5bhZv46j8jOeboKq5JMmYM3gVGdGH8xFpPWXUMsNrlODCrkoxMEeNi/XZIwuRvY4XNwYMJpw=="],
+
+    "side-channel": ["side-channel@1.1.0", "", { "dependencies": { "es-errors": "^1.3.0", "object-inspect": "^1.13.3", "side-channel-list": "^1.0.0", "side-channel-map": "^1.0.1", "side-channel-weakmap": "^1.0.2" } }, "sha512-ZX99e6tRweoUXqR+VBrslhda51Nh5MTQwou5tnUDgbtyM0dBgmhEDtWGP/xbKn6hqfPRHujUNwz5fy/wbbhnpw=="],
+
+    "side-channel-list": ["side-channel-list@1.0.0", "", { "dependencies": { "es-errors": "^1.3.0", "object-inspect": "^1.13.3" } }, "sha512-FCLHtRD/gnpCiCHEiJLOwdmFP+wzCmDEkc9y7NsYxeF4u7Btsn1ZuwgwJGxImImHicJArLP4R0yX4c2KCrMrTA=="],
+
+    "side-channel-map": ["side-channel-map@1.0.1", "", { "dependencies": { "call-bound": "^1.0.2", "es-errors": "^1.3.0", "get-intrinsic": "^1.2.5", "object-inspect": "^1.13.3" } }, "sha512-VCjCNfgMsby3tTdo02nbjtM/ewra6jPHmpThenkTYh8pG9ucZ/1P8So4u4FGBek/BjpOVsDCMoLA/iuBKIFXRA=="],
+
+    "side-channel-weakmap": ["side-channel-weakmap@1.0.2", "", { "dependencies": { "call-bound": "^1.0.2", "es-errors": "^1.3.0", "get-intrinsic": "^1.2.5", "object-inspect": "^1.13.3", "side-channel-map": "^1.0.1" } }, "sha512-WPS/HvHQTYnHisLo9McqBHOJk2FkHO/tlpvldyrnem4aeQp4hai3gythswg6p01oSoTl58rcpiFAjF2br2Ak2A=="],
+
+    "statuses": ["statuses@2.0.2", "", {}, "sha512-DvEy55V3DB7uknRo+4iOGT5fP1slR8wQohVdknigZPMpMstaKJQWhwiYBACJE3Ul2pTnATihhBYnRhZQHGBiRw=="],
+
+    "toidentifier": ["toidentifier@1.0.1", "", {}, "sha512-o5sSPKEkg/DIQNmH43V0/uerLrpzVedkUh8tGNvaeXpfpuwjKenlSox/2O/BTlZUtEe+JG7s5YhEz608PlAHRA=="],
+
+    "type-is": ["type-is@2.0.1", "", { "dependencies": { "content-type": "^1.0.5", "media-typer": "^1.1.0", "mime-types": "^3.0.0" } }, "sha512-OZs6gsjF4vMp32qrCbiVSkrFmXtG/AZhY3t0iAMrMBiAZyV9oALtXO8hsrHbMXF9x6L3grlFuwW2oAz7cav+Gw=="],
+
     "typescript": ["typescript@5.9.2", "", { "bin": { "tsc": "bin/tsc", "tsserver": "bin/tsserver" } }, "sha512-CWBzXQrc/qOkhidw1OzBTQuYRbfyxDXJMVJ1XNwUHGROVmuaeiEm3OslpZ1RV96d7SKKjZKrSJu3+t/xlw3R9A=="],
 
     "undici-types": ["undici-types@7.8.0", "", {}, "sha512-9UJ2xGDvQ43tYyVMpuHlsgApydB8ZKfVYTsLDhXkFL/6gfkp+U8xTGdh8pMJv1SpZna0zxG1DwsKZsreLbXBxw=="],
+
+    "unpipe": ["unpipe@1.0.0", "", {}, "sha512-pjy2bYhSsufwWlKwPc+l3cN7+wuJlK6uz0YdJEOlQDbl6jo/YlPi4mb8agUkVC8BF7V8NuzeyPNqRksA3hztKQ=="],
+
+    "vary": ["vary@1.1.2", "", {}, "sha512-BNGbWLfd0eUPabhkXUVm0j8uuvREyTh5ovRa/dyow/BqAbZJyC+5fU+IzQOzmAKzYqYRAISoRhdQr3eIZ/PXqg=="],
+
+    "web-streams-polyfill": ["web-streams-polyfill@3.3.3", "", {}, "sha512-d2JWLCivmZYTSIoge9MsgFCZrt571BikcWGYkjC1khllbTeDlGqZ2D8vD8E/lJa8WGWbb7Plm8/XJYV7IJHZZw=="],
+
+    "wrappy": ["wrappy@1.0.2", "", {}, "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ=="],
+
+    "wsl-utils": ["wsl-utils@0.1.0", "", { "dependencies": { "is-wsl": "^3.1.0" } }, "sha512-h3Fbisa2nKGPxCpm89Hk33lBLsnaGBvctQopaBSOW/uIs6FTe1ATyAnKFJrzVs9vpGdsTe73WF3V4lIsk4Gacw=="],
+
+    "http-errors/statuses": ["statuses@2.0.1", "", {}, "sha512-RwNA9Z/7PrK06rYLIzFMlaF+l73iwpzsqRIFgbMLbTcLD6cOao82TaWefPXQvB2fOC4AjuYSEndS7N/mTCbkdQ=="],
   }
 }

package.json

···
 {
   "name": "anthropic-api-key",
-  "version": "0.1.8",
+  "version": "0.2.1",
   "description": "CLI to fetch Anthropic API access tokens via OAuth with PKCE using Bun.",
   "type": "module",
   "private": false,
···
   "devDependencies": {
     "@types/bun": "latest",
     "typescript": "^5"
+  },
+  "dependencies": {
+    "@types/express": "^5.0.3",
+    "express": "^5.1.0",
+    "node-fetch": "^3.3.2",
+    "open": "^10.2.0"
   }
 }

src/index.ts

···
-#!/usr/bin/env bun
-
-// Detect if running under Node.js instead of Bun
-if (typeof Bun === "undefined") {
-  console.error(
-    "❌ This CLI requires Bun. Please install Bun from https://bun.sh/",
-  );
-  process.exit(1);
-}
+#!/usr/bin/env node
 
-import { serve } from "bun";
+import { createServer } from "node:http";
+import express from "express";
+import fetch from "node-fetch";
+import open from "open";
 import {
   bootstrapFromDisk,
   exchangeRefreshToken,
···
   saveToDisk,
 } from "./lib/token";
 
-const PORT = Number(Bun.env.PORT || 8787);
+const PORT = Number(process.env.PORT || 8787);
 
-function json(data: unknown, init: ResponseInit = {}) {
-  return new Response(JSON.stringify(data), {
-    headers: { "content-type": "application/json", ...(init.headers || {}) },
-    ...init,
-  });
+function json(res: express.Response, data: unknown, status = 200) {
+  res.status(status).json(data);
 }
 
 const CLIENT_ID = "9d1c250a-e61b-44d9-88ed-5944d1962f5e";
···
     client_id: CLIENT_ID,
     redirect_uri: "https://console.anthropic.com/oauth/code/callback",
     code_verifier: verifier,
-  } satisfies Record<string, string>;
+  } as Record<string, string>;
   const res = await fetch("https://console.anthropic.com/v1/oauth/token", {
     method: "POST",
     headers: {
···
 
 const argv = process.argv.slice(2);
 if (argv.includes("-h") || argv.includes("--help")) {
-  Bun.write(Bun.stdout, `Usage: anthropic\n\n`);
-  Bun.write(
-    Bun.stdout,
-    `  anthropic                Start UI and flow; prints token on success and exits.\n`,
+  console.log(`Usage: anthropic\n`);
+  console.log(
+    `  anthropic                Start UI and flow; prints token on success and exits.`,
   );
-  Bun.write(
-    Bun.stdout,
-    `  PORT=xxxx anthropic      Override port (default 8787).\n`,
-  );
-  Bun.write(
-    Bun.stdout,
+  console.log(`  PORT=xxxx anthropic      Override port (default 8787).`);
+  console.log(
     `\nTokens are cached at ~/.config/crush/anthropic and reused on later runs.\n`,
   );
   process.exit(0);
···
     string,
     { accessToken: string; refreshToken: string; expiresAt: number }
   >();
-  serve({
-    port: PORT,
-    development: { console: false },
-    routes: {
-      "/api/auth/start": {
-        POST: async () => {
-          const { verifier, challenge } = await pkcePair();
-          const authUrl = authorizeUrl(verifier, challenge);
-          return json({ authUrl, verifier });
-        },
-      },
+  const app = express();
+  app.use(express.json());
 
-      "/api/auth/complete": {
-        POST: async (req) => {
-          const body = (await req.json().catch(() => ({}))) as {
-            code?: string;
-            verifier?: string;
-          };
-          const code = String(body.code ?? "");
-          const verifier = String(body.verifier ?? "");
-          if (!code || !verifier)
-            return json({ error: "missing code or verifier" }, { status: 400 });
-          const tokens = await exchangeAuthorizationCode(code, verifier);
-          const expiresAt =
-            Math.floor(Date.now() / 1000) + (tokens.expires_in ?? 0);
-          const entry = {
-            accessToken: tokens.access_token,
-            refreshToken: tokens.refresh_token,
-            expiresAt,
-          };
-          memory.set("tokens", entry);
-          await saveToDisk(entry);
-          Bun.write(Bun.stdout, `${entry.accessToken}\n`);
-          setTimeout(() => process.exit(0), 100);
-          return json({ ok: true });
-        },
-      },
+  app.post("/api/auth/start", async (_req, res) => {
+    const { verifier, challenge } = await pkcePair();
+    const authUrl = authorizeUrl(verifier, challenge);
+    json(res, { authUrl, verifier });
+  });
+
+  app.post("/api/auth/complete", async (req, res) => {
+    const body = req.body as { code?: string; verifier?: string };
+    const code = String(body.code ?? "");
+    const verifier = String(body.verifier ?? "");
+    if (!code || !verifier)
+      return json(res, { error: "missing code or verifier" }, 400);
+    const tokens = await exchangeAuthorizationCode(code, verifier);
+    const expiresAt = Math.floor(Date.now() / 1000) + (tokens.expires_in ?? 0);
+    const entry = {
+      accessToken: tokens.access_token,
+      refreshToken: tokens.refresh_token,
+      expiresAt,
+    };
+    memory.set("tokens", entry);
+    await saveToDisk(entry);
+    console.log(`${entry.accessToken}\n`);
+    setTimeout(() => process.exit(0), 100);
+    json(res, { ok: true });
+  });
 
-      // Get current token (refresh if needed)
-      "/api/token": {
-        GET: async () => {
-          let entry = memory.get("tokens");
-          if (!entry) {
-            const disk = await loadFromDisk();
-            if (disk) {
-              entry = disk;
-              memory.set("tokens", entry);
-            }
-          }
-          if (!entry)
-            return json({ error: "not_authenticated" }, { status: 401 });
-          const now = Math.floor(Date.now() / 1000);
-          if (now >= entry.expiresAt - 60) {
-            const refreshed = await exchangeRefreshToken(entry.refreshToken);
-            entry.accessToken = refreshed.access_token;
-            entry.expiresAt =
-              Math.floor(Date.now() / 1000) + refreshed.expires_in;
-            if (refreshed.refresh_token)
-              entry.refreshToken = refreshed.refresh_token;
-            memory.set("tokens", entry);
-            await saveToDisk(entry);
-          }
-          return json({
-            accessToken: entry.accessToken,
-            expiresAt: entry.expiresAt,
-          });
-        },
-      },
+  app.get("/api/token", async (_req, res) => {
+    let entry = memory.get("tokens");
+    if (!entry) {
+      const disk = await loadFromDisk();
+      if (disk) {
+        entry = disk;
+        memory.set("tokens", entry);
+      }
+    }
+    if (!entry) return json(res, { error: "not_authenticated" }, 401);
+    const now = Math.floor(Date.now() / 1000);
+    if (now >= entry.expiresAt - 60) {
+      const refreshed = await exchangeRefreshToken(entry.refreshToken);
+      entry.accessToken = refreshed.access_token;
+      entry.expiresAt = Math.floor(Date.now() / 1000) + refreshed.expires_in;
+      if (refreshed.refresh_token) entry.refreshToken = refreshed.refresh_token;
+      memory.set("tokens", entry);
+      await saveToDisk(entry);
+    }
+    json(res, {
+      accessToken: entry.accessToken,
+      expiresAt: entry.expiresAt,
+    });
+  });
 
-      // Wildcard route for all other /api/ routes
-      "/": () =>
-        new Response(indexHtml, {
-          headers: { "content-type": "text/html; charset=utf-8" },
-        }),
-    },
+  app.get("/", (_req, res) => {
+    res.setHeader("content-type", "text/html; charset=utf-8");
+    res.send(indexHtml);
+  });
 
-    // Fallback for all other routes: serve static or 404
-    fetch() {
-      return new Response(
-        "something went wrong and your request fell through",
-        { status: 404 },
-      );
-    },
+  app.use((_req, res) => {
+    res.status(404).send("something went wrong and your request fell through");
   });
 
-  // Open browser
-  const url = `http://localhost:${PORT}`;
-  if (process.platform === "darwin") {
-    Bun.$`open ${url}`.catch(() => {});
-  } else if (process.platform === "win32") {
-    Bun.$`cmd /c start "" ${url}`.catch(() => {});
-  } else {
-    Bun.$`xdg-open ${url}`.catch(() => {});
-  }
+  const server = createServer(app);
+  server.listen(PORT, async () => {
+    const url = `http://localhost:${PORT}`;
+    await open(url);
+  });
 }

src/lib/token.ts

···
+import { chmodSync, existsSync } from "node:fs";
+import fs from "node:fs/promises";
+import path from "node:path";
+
 const CLIENT_ID = "9d1c250a-e61b-44d9-88ed-5944d1962f5e";
 
-const HOME = Bun.env.HOME || Bun.env.USERPROFILE || ".";
-const CACHE_DIR = `${HOME}/.config/crush/anthropic`;
-const BEARER_FILE = `${CACHE_DIR}/bearer_token`;
-const REFRESH_FILE = `${CACHE_DIR}/refresh_token`;
-const EXPIRES_FILE = `${CACHE_DIR}/bearer_token.expires`;
+const HOME = process.env.HOME || process.env.USERPROFILE || ".";
+const CACHE_DIR = path.join(HOME, ".config/crush/anthropic");
+const BEARER_FILE = path.join(CACHE_DIR, "bearer_token");
+const REFRESH_FILE = path.join(CACHE_DIR, "refresh_token");
+const EXPIRES_FILE = path.join(CACHE_DIR, "bearer_token.expires");
 
 export type TokenEntry = {
   accessToken: string;
···
 };
 
 export async function ensureDir() {
-  await Bun.$`mkdir -p ${CACHE_DIR}`;
+  await fs.mkdir(CACHE_DIR, { recursive: true });
 }
 
-export async function writeSecret(path: string, data: string) {
-  await Bun.write(path, data);
-  await Bun.$`chmod 600 ${path}`;
+export async function writeSecret(filePath: string, data: string) {
+  await fs.writeFile(filePath, data, { encoding: "utf8", mode: 0o600 });
+  chmodSync(filePath, 0o600);
 }
 
-export async function readText(path: string) {
-  const f = Bun.file(path);
-  if (!(await f.exists())) return undefined;
-  return await f.text();
+export async function readText(filePath: string) {
+  if (!existsSync(filePath)) return undefined;
+  return await fs.readFile(filePath, "utf8");
 }
 
 export async function loadFromDisk(): Promise<TokenEntry | undefined> {
···
   if (!entry) return false;
   const now = Math.floor(Date.now() / 1000);
   if (now < entry.expiresAt - 60) {
-    Bun.write(Bun.stdout, `${entry.accessToken}\n`);
+    process.stdout.write(`${entry.accessToken}\n`);
     setTimeout(() => process.exit(0), 50);
     return true;
   }
···
     entry.expiresAt = Math.floor(Date.now() / 1000) + refreshed.expires_in;
     if (refreshed.refresh_token) entry.refreshToken = refreshed.refresh_token;
     await saveToDisk(entry);
-    Bun.write(Bun.stdout, `${entry.accessToken}\n`);
+    process.stdout.write(`${entry.accessToken}\n`);
     setTimeout(() => process.exit(0), 50);
     return true;
   } catch {