diff --git a/src/plugins/nodePolyfills.ts b/src/plugins/nodePolyfills.ts
index 6b24454..baa777b 100644
--- a/src/plugins/nodePolyfills.ts
+++ b/src/plugins/nodePolyfills.ts
@@ -274,22 +274,10 @@ const utilModule: any = {
   types: { isDate: (x: any) => x instanceof Date, isRegExp: (x: any) => x instanceof RegExp, isError: (x: any) => x instanceof Error, isArray: Array.isArray, isFunction: (x: any) => typeof x === 'function' },
 };
 
-// Crypto helpers using Web Crypto API
-async function subtleDigest(algo: string, data: Uint8Array): Promise<Uint8Array> {
-  const alg = algo === 'md5' ? 'MD5' : algo.toUpperCase();
-  const name = alg === 'MD5' ? 'MD5' : alg === 'SHA1' ? 'SHA-1' : alg === 'SHA256' ? 'SHA-256' : alg === 'SHA512' ? 'SHA-512' : alg;
-  const sub = (globalThis as any).crypto?.subtle;
-  if (sub) {
-    try { return new Uint8Array(await sub.digest(name, data)); } catch { /* fallthrough */ }
-  }
-  return simpleHash(algo, data);
-}
-
 function simpleHash(algo: string, data: Uint8Array): Uint8Array {
   let s = '';
   for (let i = 0; i < data.length; i++) s += String.fromCharCode(data[i]);
   const algoKey = algo.toLowerCase();
-  let h: number;
   if (algoKey === 'md5') {
     let a = 0x67452301, b = 0xefcdab89, c = 0x98badcfe, d = 0x10325476;
     const msg = new Uint8Array(data.length + 1);
@@ -372,8 +360,6 @@ function aesEcbEncrypt(data: Uint8Array, key: Uint8Array): Uint8Array {
     }
     w[i*4] = w[(i-Nk)*4] ^ temp[0]; w[i*4+1] = w[(i-Nk)*4+1] ^ temp[1]; w[i*4+2] = w[(i-Nk)*4+2] ^ temp[2]; w[i*4+3] = w[(i-Nk)*4+3] ^ temp[3];
   }
-  function subWord(r: Uint8Array) { for (let i = 0; i < 4; i++) r[i] = sbox[r[i]]; }
-  function rotWord(r: Uint8Array) { const t = r[0]; r[0] = r[1]; r[1] = r[2]; r[2] = r[3]; r[3] = t; }
   function addRoundKey(state: Uint8Array, round: number) { for (let i = 0; i < 16; i++) state[i] ^= w[round * 16 + i]; }
   function subBytes(state: Uint8Array) { for (let i = 0; i < 16; i++) state[i] = sbox[state[i]]; }
   function shiftRows(state: Uint8Array) {
@@ -481,48 +467,6 @@ function aesEcbDecrypt(data: Uint8Array, key: Uint8Array): Uint8Array {
   return out;
 }
 
-async function aesCbcEncrypt(data: Uint8Array, key: Uint8Array, iv: Uint8Array): Promise<Uint8Array> {
-  const sub = (globalThis as any).crypto?.subtle;
-  if (sub) {
-    const alg = { name: 'AES-CBC', iv };
-    const k = await sub.importKey('raw', key, alg, false, ['encrypt']);
-    return new Uint8Array(await sub.encrypt(alg, k, data));
-  }
-  const padded = data.length % 16 === 0 ? data : (() => { const p = 16 - (data.length % 16); const out = new Uint8Array(data.length + p); out.set(data); for (let i = 0; i < p; i++) out[data.length + i] = p; return out; })();
-  const blocks = padded.length / 16;
-  const out = new Uint8Array(padded.length);
-  let prev = new Uint8Array(iv);
-  for (let b = 0; b < blocks; b++) {
-    const block = new Uint8Array(padded.subarray(b * 16, (b + 1) * 16));
-    for (let i = 0; i < 16; i++) block[i] ^= prev[i];
-    const encrypted = aesEcbEncrypt(block, key);
-    out.set(encrypted, b * 16);
-    prev = encrypted;
-  }
-  return out;
-}
-
-async function aesCbcDecrypt(data: Uint8Array, key: Uint8Array, iv: Uint8Array): Promise<Uint8Array> {
-  const sub = (globalThis as any).crypto?.subtle;
-  if (sub) {
-    const alg = { name: 'AES-CBC', iv };
-    const k = await sub.importKey('raw', key, alg, false, ['decrypt']);
-    return new Uint8Array(await sub.decrypt(alg, k, data));
-  }
-  const blocks = data.length / 16;
-  const out = new Uint8Array(data.length);
-  let prev = new Uint8Array(iv);
-  for (let b = 0; b < blocks; b++) {
-    const block = new Uint8Array(data.subarray(b * 16, (b + 1) * 16));
-    const decrypted = aesEcbDecrypt(block, key);
-    for (let i = 0; i < 16; i++) out[b * 16 + i] = decrypted[i] ^ prev[i];
-    prev = block;
-  }
-  const padLen = out[out.length - 1];
-  if (padLen > 0 && padLen <= 16) return out.subarray(0, out.length - padLen);
-  return out;
-}
-
 function rsaPublicEncrypt(data: Uint8Array, keyPem: string): Uint8Array {
   const pemHeader = '-----BEGIN PUBLIC KEY-----';
   const pemFooter = '-----END PUBLIC KEY-----';
@@ -551,10 +495,10 @@ function rsaPublicEncrypt(data: Uint8Array, keyPem: string): Uint8Array {
   readLen();
   if (der[offset] === 0x30) {
     readTag(0x30);
-    const algoOid = readTag(0x06);
+    readTag(0x06);
     offset++; readLen();
     if (der[offset++] !== 0x03) throw new Error('Invalid DER bit string');
-    const bitLen = readLen();
+    readLen();
     offset++;
     if (der[offset++] !== 0x00) throw new Error('Invalid DER padding');
     if (der[offset++] !== 0x30) throw new Error('Invalid DER inner sequence');
@@ -659,9 +603,8 @@ const cryptoModule: any = {
       return v.toString(16);
     });
   },
-  createCipheriv: function(algo: string, key: any, iv: any) {
+  createCipheriv: function(algo: string, key: any, _iv: any) {
     const keyBuf = toBuffer(key);
-    const ivBuf = iv ? toBuffer(iv) : new Uint8Array(0);
     return {
       update: function(data: any) {
         const dataBuf = toBuffer(data);
@@ -671,9 +614,8 @@ const cryptoModule: any = {
       final: function() { return new Uint8Array(0); },
     };
   },
-  createDecipheriv: function(algo: string, key: any, iv: any) {
+  createDecipheriv: function(algo: string, key: any, _iv: any) {
     const keyBuf = toBuffer(key);
-    const ivBuf = iv ? toBuffer(iv) : new Uint8Array(0);
     return {
       update: function(data: any) {
         const dataBuf = toBuffer(data);
diff --git a/src/plugins/pluginManager.ts b/src/plugins/pluginManager.ts
index e14cfdc..b7126bf 100644
--- a/src/plugins/pluginManager.ts
+++ b/src/plugins/pluginManager.ts
@@ -34,8 +34,6 @@ function getPluginSourcePrefixes(): string[] {
     ];
 }
 
-const PLUGIN_SOURCE_PREFIXES = getPluginSourcePrefixes();
-
 interface LoadedPlugin {
     id: string;
     name: string;