diff --git a/.husky/pre-commit b/.husky/pre-commit
new file mode 100644
index 0000000..3867a0f
--- /dev/null
+++ b/.husky/pre-commit
@@ -0,0 +1 @@
+npm run lint
diff --git a/README.md b/README.md
index 22ad129..f59e217 100644
--- a/README.md
+++ b/README.md
@@ -28,6 +28,7 @@ npm run dev      # Builds in dev mode + launches Electron
 | `npm run dist:linux` | Build + package for Linux (AppImage + deb) |
 | `npm run dist:all` | Build + package for all platforms |
 | `npm run clean` | Remove `dist/` and `out/` directories |
+| `npm run lint` | Run ESLint (typescript-eslint) on `src/` |
 
 ## Architecture
 
@@ -138,7 +139,7 @@ src/
     platform.ts        OS detection, Chromium GPU/performance flags (per-platform)
     config.ts          electron-store schema, defaults, DEFAULT_KEYBINDS
     client-ui.ts       Injected CSS for settings panel, keybind dialog, matchmaker popup
-    swapper.ts         Resource swapper — local asset overrides via custom protocol
+    swapper.ts         Resource swapper — local asset overrides via session-aware custom protocol
     userscripts.ts     Userscript manager — filesystem scanning, tracker.json, preferences
     discord-rpc.ts     Discord Rich Presence via raw IPC socket
     logger.ts          File logging with daily rotation and 7-day retention
@@ -159,7 +160,7 @@ Two Vite configs build independent targets:
 | Config | Target | Output | Notes |
 |--------|--------|--------|-------|
 | `vite.main.config.ts` | Main process | `dist/main/index.js` (CJS) | Externalizes `electron`, `electron-store`, and Node builtins. Targets Node 20. |
-| `vite.preload.config.ts` | Preload script | `dist/preload/index.js` (CJS) | Externalizes `electron` and `uuid`. Targets Node 20. |
+| `vite.preload.config.ts` | Preload script | `dist/preload/index.js` (CJS) | Externalizes `electron`. Targets Node 20. |
 
 ### Custom Electron Binary
 
@@ -214,7 +215,7 @@ Common flags always applied: `disable-backgrounding-occluded-windows`, `ignore-g
 ### Core Client
 - Unlimited FPS via custom-patched Electron 42 build
 - Ad blocking (network-level URL filter + CSS hiding)
-- Resource swapper (replace game textures, sounds, models with local files)
+- Resource swapper (replace game textures, sounds, models with local files — rescans on page refresh)
 - Custom matchmaker (filter lobbies by region, gamemode, player count, remaining time)
 - Userscript system (Tampermonkey-style metadata, custom per-script settings, instant toggle via unload)
 - Chat translator (real-time translation via Google Translate API with language tags)
@@ -267,8 +268,9 @@ At uncapped frame rates (600+ FPS), Krunker's CSS animations (e.g. death screen
 - **TypeScript** 5.7 — Type-safe source code
 - **Vite** 6 — Fast bundler (2 build targets: main + preload)
 - **electron-store** 8 — JSON config persistence (CJS)
-- **uuid** 9 — Unique ID generation
 - **electron-builder** 26 — Cross-platform packaging (NSIS, portable, AppImage, deb)
+- **ESLint** 10 + **typescript-eslint** — Linting with recommended rules
+- **Husky** 9 — Git hooks (pre-commit lint)
 
 ## Project Structure
 
@@ -284,6 +286,7 @@ Krunker-Civilian-Client/
   build/            Build resources (icons, .desktop file)
   scripts/          Build scripts (Electron patched binary download)
   electron-build/   Custom Electron build instructions and patches
+  eslint.config.mjs
   vite.main.config.ts
   vite.preload.config.ts
   electron-builder.yml
diff --git a/package-lock.json b/package-lock.json
index 7b6c4eb..795b5ff 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,17 +1,16 @@
 {
   "name": "krunker-civilian-client",
-  "version": "0.5.1",
+  "version": "0.5.2",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "krunker-civilian-client",
-      "version": "0.5.1",
+      "version": "0.5.2",
       "hasInstallScript": true,
       "license": "MIT",
       "dependencies": {
-        "electron-store": "^8.2.0",
-        "uuid": "^9.0.1"
+        "electron-store": "^8.2.0"
       },
       "devDependencies": {
         "@eslint/js": "^10.0.1",
@@ -19,6 +18,7 @@
         "electron": "npm:electron-nightly@42.0.0-nightly.20260227",
         "electron-builder": "^26.0.0",
         "eslint": "^10.0.2",
+        "husky": "^9.1.7",
         "rimraf": "^6.0.1",
         "typescript": "^5.7.0",
         "typescript-eslint": "^8.56.1",
@@ -4674,6 +4674,22 @@
         "node": ">= 14"
       }
     },
+    "node_modules/husky": {
+      "version": "9.1.7",
+      "resolved": "https://registry.npmjs.org/husky/-/husky-9.1.7.tgz",
+      "integrity": "sha512-5gs5ytaNjBrh5Ow3zrvdUUY+0VxIuWVL4i9irt6friV+BqdCfmV11CQTWMiBYWHbXhco+J1kHfTOUkePhCDvMA==",
+      "dev": true,
+      "license": "MIT",
+      "bin": {
+        "husky": "bin.js"
+      },
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/typicode"
+      }
+    },
     "node_modules/iconv-corefoundation": {
       "version": "1.1.7",
       "resolved": "https://registry.npmjs.org/iconv-corefoundation/-/iconv-corefoundation-1.1.7.tgz",
@@ -5789,6 +5805,7 @@
       "integrity": "sha512-5gTmgEY/sqK6gFXLIsQNH19lWb4ebPDLA4SdLP7dsWkIXHWlG66oPuVvXSGFPppYZz8ZDZq0dYYrbHfBCVUb1Q==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "engines": {
         "node": ">=12"
       },
@@ -6889,19 +6906,6 @@
       "dev": true,
       "license": "MIT"
     },
-    "node_modules/uuid": {
-      "version": "9.0.1",
-      "resolved": "https://registry.npmjs.org/uuid/-/uuid-9.0.1.tgz",
-      "integrity": "sha512-b+1eJOlsR9K8HJpow9Ok3fiWOWSIcIzXodvv0rQjVoOVNpWMpxf1wZNpt4y9h10odCNrqnYp1OBzRktckBe3sA==",
-      "funding": [
-        "https://github.com/sponsors/broofa",
-        "https://github.com/sponsors/ctavan"
-      ],
-      "license": "MIT",
-      "bin": {
-        "uuid": "dist/bin/uuid"
-      }
-    },
     "node_modules/verror": {
       "version": "1.10.1",
       "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.1.tgz",
diff --git a/package.json b/package.json
index 49f70dd..a9a6830 100644
--- a/package.json
+++ b/package.json
@@ -1,38 +1,39 @@
-{
-  "name": "krunker-civilian-client",
-  "version": "0.5.2",
-  "description": "Cross-platform Krunker game client",
-  "main": "dist/main/index.js",
-  "homepage": "https://gitea.crjlab.net/bigjakk/krunker-civilian-client",
-  "author": "Krunker Civilian Client <krunker@crjlab.net>",
-  "license": "MIT",
-  "scripts": {
-    "postinstall": "node scripts/download-electron.js",
-    "dev": "vite build --mode development --config vite.main.config.ts && vite build --mode development --config vite.preload.config.ts && electron .",
-    "build:main": "vite build --config vite.main.config.ts",
-    "build:preload": "vite build --config vite.preload.config.ts",
-    "build": "npm run build:main && npm run build:preload",
-    "start": "npm run build && electron .",
-    "download-electron": "node scripts/download-electron.js",
-    "dist:win": "npm run build && electron-builder --win",
-    "dist:linux": "npm run build && electron-builder --linux",
-    "dist:all": "npm run build && electron-builder --win --linux",
-    "clean": "rimraf dist out",
-    "lint": "eslint src/"
-  },
-  "dependencies": {
-    "electron-store": "^8.2.0",
-    "uuid": "^9.0.1"
-  },
-  "devDependencies": {
-    "@eslint/js": "^10.0.1",
-    "@types/node": "^22.0.0",
-    "electron": "npm:electron-nightly@42.0.0-nightly.20260227",
-    "electron-builder": "^26.0.0",
-    "eslint": "^10.0.2",
-    "rimraf": "^6.0.1",
-    "typescript": "^5.7.0",
-    "typescript-eslint": "^8.56.1",
-    "vite": "^6.0.0"
-  }
-}
+{
+  "name": "krunker-civilian-client",
+  "version": "0.5.3",
+  "description": "Cross-platform Krunker game client",
+  "main": "dist/main/index.js",
+  "homepage": "https://gitea.crjlab.net/bigjakk/krunker-civilian-client",
+  "author": "Krunker Civilian Client <krunker@crjlab.net>",
+  "license": "MIT",
+  "scripts": {
+    "postinstall": "node scripts/download-electron.js",
+    "dev": "vite build --mode development --config vite.main.config.ts && vite build --mode development --config vite.preload.config.ts && electron .",
+    "build:main": "vite build --config vite.main.config.ts",
+    "build:preload": "vite build --config vite.preload.config.ts",
+    "build": "npm run build:main && npm run build:preload",
+    "start": "npm run build && electron .",
+    "download-electron": "node scripts/download-electron.js",
+    "dist:win": "npm run build && electron-builder --win",
+    "dist:linux": "npm run build && electron-builder --linux",
+    "dist:all": "npm run build && electron-builder --win --linux",
+    "clean": "rimraf dist out",
+    "lint": "eslint src/",
+    "prepare": "husky"
+  },
+  "dependencies": {
+    "electron-store": "^8.2.0"
+  },
+  "devDependencies": {
+    "@eslint/js": "^10.0.1",
+    "@types/node": "^22.0.0",
+    "electron": "npm:electron-nightly@42.0.0-nightly.20260227",
+    "electron-builder": "^26.0.0",
+    "eslint": "^10.0.2",
+    "husky": "^9.1.7",
+    "rimraf": "^6.0.1",
+    "typescript": "^5.7.0",
+    "typescript-eslint": "^8.56.1",
+    "vite": "^6.0.0"
+  }
+}
diff --git a/src/main/index.ts b/src/main/index.ts
index 53b444f..a089e0a 100644
--- a/src/main/index.ts
+++ b/src/main/index.ts
@@ -211,14 +211,14 @@ app.whenReady().then(async () => {
 async function launchApp(): Promise<void> {
   electronLog.log('[KCC] Starting initialization');
 
-  // ── Register swapper file protocol ──
-  registerSwapperFileProtocol();
-
   // ── Session: persistent partition + clean user-agent ──
   const ses = session.fromPartition('persist:krunker');
   const rawUA = ses.getUserAgent();
   ses.setUserAgent(rawUA.replace(/\s*krunker-civilian-client\/\S+/i, ''));
 
+  // ── Register swapper file protocol on this session ──
+  registerSwapperFileProtocol(ses);
+
   // ── Resource swapper ──
   const swapperConfig = config.get('swapper');
   const swapDir = swapperConfig.path || join(app.getPath('userData'), 'Krunker Civilian Client', 'swapper');
@@ -240,16 +240,17 @@ async function launchApp(): Promise<void> {
     : [...BLOCKED_URL_PATTERNS];
 
   ses.webRequest.onBeforeRequest({ urls: requestFilterUrls }, (details, callback) => {
+    // Check swapper first — redirect matching assets to local files
     if (swapper) {
       const redirect = swapper.getRedirect(details.url);
       if (redirect) return callback({ redirectURL: redirect });
     }
-    // If we got here via the broad krunker.io pattern (not an ad), let it through
+    // Determine if this URL is a krunker.io request (matched by the broad swapper pattern)
+    // vs an ad-block pattern. krunker.io requests that weren't swapped pass through normally.
     try {
-      const host = new URL(details.url).hostname;
-      if (host.endsWith('krunker.io')) return callback({});
-    } catch { /* ignore invalid URLs */ }
-    // Otherwise it matched an ad-block pattern — cancel it
+      if (new URL(details.url).hostname.endsWith('krunker.io')) return callback({});
+    } catch { /* invalid URL — fall through to cancel */ }
+    // Matched an ad-block pattern — cancel it
     callback({ cancel: true });
   });
 
@@ -460,6 +461,8 @@ async function launchApp(): Promise<void> {
   // ── Inject scripts after page loads ──
   win.webContents.on('did-finish-load', () => {
     electronLog.log(`[KCC] Page loaded: ${win.webContents.getURL()}`);
+    // Rescan swap directory so new/changed files are picked up on refresh
+    if (swapper) swapper.rescan().catch(() => {});
     Promise.all([
       win.webContents.insertCSS(HIDE_ADS_CSS),
       win.webContents.insertCSS(ALL_CLIENT_CSS),
diff --git a/src/main/swapper.ts b/src/main/swapper.ts
index 2d19b88..025ca1c 100644
--- a/src/main/swapper.ts
+++ b/src/main/swapper.ts
@@ -1,27 +1,53 @@
 import { existsSync, mkdirSync, promises as fsp } from 'fs';
 import { join } from 'path';
-import { protocol, net } from 'electron';
+import { protocol, net, Session } from 'electron';
 
 const PROTOCOL_NAME = 'kpc-swap';
 const TARGET_DOMAIN = 'krunker.io';
 
+/**
+ * Convert a native file path to a proper kpc-swap:// URL.
+ * Windows paths like C:\foo\bar become kpc-swap://C/foo/bar
+ */
+function filePathToSwapURL(filePath: string): string {
+  const forwardSlash = filePath.replace(/\\/g, '/');
+  // Windows drive letter: C:/foo → kpc-swap://C/foo
+  const match = forwardSlash.match(/^([A-Za-z]):\/(.*)/);
+  if (match) {
+    return `${PROTOCOL_NAME}://${match[1]}/${match[2]}`;
+  }
+  // Unix absolute: /home/user/foo → kpc-swap:///home/user/foo
+  return `${PROTOCOL_NAME}://${forwardSlash}`;
+}
+
 /**
  * Register the custom protocol scheme. Must be called BEFORE app.ready.
  */
 export function initSwapperProtocol(): void {
   protocol.registerSchemesAsPrivileged([{
     scheme: PROTOCOL_NAME,
-    privileges: { secure: true, corsEnabled: true, bypassCSP: true },
+    privileges: { standard: true, secure: true, corsEnabled: true, bypassCSP: true },
   }]);
 }
 
 /**
- * Register the file protocol handler. Must be called AFTER app.ready.
+ * Register the file protocol handler on the given session.
+ * Must be called AFTER app.ready.
  */
-export function registerSwapperFileProtocol(): void {
-  protocol.handle(PROTOCOL_NAME, (request) => {
-    const filePath = decodeURI(request.url.replace(`${PROTOCOL_NAME}:`, ''));
-    return net.fetch('file://' + filePath);
+export function registerSwapperFileProtocol(ses: Session): void {
+  ses.protocol.handle(PROTOCOL_NAME, (request) => {
+    const url = new URL(request.url);
+    // Reconstruct the file path from the URL
+    // Windows: kpc-swap://C/foo/bar → C:/foo/bar
+    // Unix:    kpc-swap:///home/foo  → /home/foo
+    let filePath: string;
+    if (url.hostname) {
+      // Windows drive letter is the hostname
+      filePath = `${url.hostname}:${url.pathname}`;
+    } else {
+      filePath = url.pathname;
+    }
+    return net.fetch(`file://${filePath}`);
   });
 }
 
@@ -47,6 +73,13 @@ export class ResourceSwapper {
     this.ready = true;
   }
 
+  /** Rescan the swap directory to pick up added/removed/changed files */
+  async rescan(): Promise<void> {
+    this.swapFiles.clear();
+    await this.scanAsync('');
+    this.ready = true;
+  }
+
   /** URL filter patterns for webRequest.onBeforeRequest — single broad pattern */
   get patterns(): string[] {
     return this.swapFiles.size > 0 ? [`*://*.${TARGET_DOMAIN}/*`] : [];
@@ -70,7 +103,7 @@ export class ResourceSwapper {
       let pathname = queryStart === -1 ? url.substring(pathStart) : url.substring(pathStart, queryStart);
       if (pathname.startsWith('/assets/')) pathname = pathname.substring(7);
       const localPath = this.swapFiles.get(pathname);
-      if (localPath) return `${PROTOCOL_NAME}:/${localPath}`;
+      if (localPath) return filePathToSwapURL(localPath);
     } catch { /* malformed URL — ignore */ }
     return null;
   }
diff --git a/vite.preload.config.ts b/vite.preload.config.ts
index 9aed58e..cc165f5 100644
--- a/vite.preload.config.ts
+++ b/vite.preload.config.ts
@@ -13,7 +13,7 @@ export default defineConfig({
     outDir: 'dist/preload',
     emptyDirBefore: true,
     rollupOptions: {
-      external: ['electron', 'uuid'],
+      external: ['electron'],
     },
     target: 'node20',
     minify: isProd,