diff --git a/bin/bundle.config.json b/bin/bundle.config.json
index f2e3a8e7..93994e27 100644
--- a/bin/bundle.config.json
+++ b/bin/bundle.config.json
@@ -1,11 +1,16 @@
 {
+    "compress": false,
     "outputs": {
       "bundle": "./web/boot/bundle.bin"
     },
     "inputs": [
-      { "root": "./web", "prefix": "" },
-      { "root": "./src", "prefix": "lib" },
-      { "root": "./src/wasm", "prefix": "wasm" },
-      { "root": "./src/wasm", "prefix": "lib/kiri/wasm" }
+      { "root": "web", "prefix": "" },
+      { "root": "src", "prefix": "lib" },
+      { "root": "src/wasm", "prefix": "wasm" },
+      { "root": "src/wasm", "prefix": "lib/kiri/wasm" }
+    ],
+    "excludes": [
+        "src/pack",
+        "web/boot/bundle.bin"
     ]
 }
diff --git a/bin/bundler.mjs b/bin/bundler.mjs
index e55e9821..3a96efb4 100644
--- a/bin/bundler.mjs
+++ b/bin/bundler.mjs
@@ -4,10 +4,17 @@ import uglify from 'uglify-js';
 import { Buffer } from 'buffer';
 
 const cfg = JSON.parse(fs.readFileSync(process.argv[2] || './bin/bundle.config.json', 'utf8'));
-const compress = process.env.UGLIFY ? true : false
+const { inputs, outputs, excludes, compress } = cfg;
+const envcomp = process.env.COMPRESS ? JSON.parse(process.env.COMPRESS) : undefined;
+const debug = process.env.DEBUG;
 
 // --- recursive directory walker (follows symlinks safely) ---
 function* walk(dir, seen = new Set()) {
+    dir = path.normalize(dir);
+    if (excludes.indexOf(dir) >= 0) {
+        return;
+    }
+
     const real = fs.realpathSync(dir);
     if (seen.has(real)) {
         return;
@@ -25,7 +32,7 @@ function* walk(dir, seen = new Set()) {
 
 // --- collect all files according to config ---
 let entries = [];
-for (const input of cfg.inputs) {
+for (const input of inputs) {
     const root = input.root;
     const prefix = input.prefix || '';
     for (const file of walk(root)) {
@@ -42,16 +49,17 @@ let offset = 0;
 let cache = new Map();
 
 for (const { file, virt } of entries) {
-    if (file.endsWith('/bundle.bin')) {
+    if (excludes.indexOf(file) >= 0) {
         continue;
     }
     let record = cache.get(file);
     if (record) {
-        // console.log({ dup: file });
+        if (debug) console.log({ alias: virt, from: file });
         entryMeta.push({ ...record, virt });
     } else {
+        if (debug) console.log({ write: virt, from: file });
         let data = fs.readFileSync(file);
-        if (compress && file.endsWith("js")) {
+        if ((envcomp ?? compress) && file.endsWith("js")) {
             console.log('compress', file);
             data = uglify.minify(data.toString(), {
                 compress: {
@@ -61,7 +69,7 @@ for (const { file, virt } of entries) {
             });
             // console.log({ to: typeof(data), data });
             if (!data.code) {
-                console.log({ skip: file });
+                if (debug) console.log({ skip: file });
                 continue;
             }
             data = Buffer.from(data.code);
@@ -102,7 +110,7 @@ const header = Buffer.concat([count, ...headerParts]);
 const full = Buffer.concat([header, ...dataParts]);
 
 // --- write final bundle ---
-const outPath = cfg.outputs.bundle || './bundle.bin';
+const outPath = outputs.bundle || './bundle.bin';
 fs.mkdirSync(path.dirname(outPath), { recursive: true });
 fs.writeFileSync(outPath, full); // ⚡ write raw binary