diff --git a/.eslintrc.json b/.eslintrc.json
index cf237947..3a3cd1c7 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -14,5 +14,6 @@
   "rules": {
     "no-unused-vars": ["warn", { "destructuredArrayIgnorePattern": ".", "ignoreRestSiblings": false }],
     "import/no-extraneous-dependencies": ["error", {"devDependencies": true}]
-  }
+  },
+  "files": ["**/*.mjs", "**/*.js"]
 }
diff --git a/eslint.config.mjs b/eslint.config.mjs
new file mode 100644
index 00000000..19d9bb39
--- /dev/null
+++ b/eslint.config.mjs
@@ -0,0 +1,86 @@
+import _import from 'eslint-plugin-import';
+import { fixupPluginRules } from '@eslint/compat';
+import globals from 'globals';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+import js from '@eslint/js';
+import { FlatCompat } from '@eslint/eslintrc';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const compat = new FlatCompat({
+  baseDirectory: __dirname,
+  recommendedConfig: js.configs.recommended,
+  allConfig: js.configs.all,
+});
+
+export default [
+  {
+    ignores: [
+      '**/krill-parser.js',
+      '**/krill.pegjs',
+      '**/.eslintrc.json',
+      '**/server.js',
+      '**/tidal-sniffer.js',
+      '**/*.jsx',
+      '**/tunejs.js',
+      'out/**/*',
+      '**/postcss.config.js',
+      '**/postcss.config.cjs',
+      '**/tailwind.config.js',
+      '**/tailwind.config.cjs',
+      '**/vite.config.js',
+      '**/dist/**/*',
+      '!**/*.mjs',
+      '**/*.tsx',
+      '**/*.ts',
+      '**/*.json',
+      '**/dev-dist',
+      '**/dist',
+      'src-tauri/target/**/*',
+      '**/reverbGen.mjs',
+      '**/hydra.mjs',
+      '**/jsdoc-synonyms.js',
+      'packages/hs2js/src/hs2js.mjs',
+      '**/samples',
+    ],
+  },
+  ...compat.extends('eslint:recommended').map((config) => ({
+    ...config,
+    files: ['**/*.mjs', '**/*.js'],
+  })),
+  {
+    files: ['**/*.mjs', '**/*.js'],
+
+    plugins: {
+      import: fixupPluginRules(_import),
+    },
+
+    languageOptions: {
+      globals: {
+        ...globals.node,
+        ...globals.browser,
+      },
+
+      ecmaVersion: 'latest',
+      sourceType: 'module',
+    },
+
+    rules: {
+      'no-unused-vars': [
+        'warn',
+        {
+          destructuredArrayIgnorePattern: '.',
+          ignoreRestSiblings: false,
+        },
+      ],
+
+      'import/no-extraneous-dependencies': [
+        'error',
+        {
+          devDependencies: true,
+        },
+      ],
+    },
+  },
+];
diff --git a/package.json b/package.json
index 3c7355c3..0a7a49ba 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
     "osc": "cd packages/osc && npm run server",
     "jsdoc": "jsdoc packages/ -c jsdoc/jsdoc.config.json",
     "jsdoc-json": "jsdoc packages/ --template ./node_modules/jsdoc-json --destination doc.json -c jsdoc/jsdoc.config.json",
-    "lint": "eslint . --ext mjs,js --quiet",
+    "lint": "eslint . --quiet",
     "codeformat": "prettier --write .",
     "format-check": "prettier --check .",
     "report-undocumented": "npm run jsdoc-json && node jsdoc/undocumented.mjs > undocumented.json",
@@ -55,6 +55,9 @@
     "@strudel/xen": "workspace:*"
   },
   "devDependencies": {
+    "@eslint/compat": "^1.2.5",
+    "@eslint/eslintrc": "^3.2.0",
+    "@eslint/js": "^9.19.0",
     "@tauri-apps/cli": "^2.2.5",
     "@vitest/ui": "^3.0.4",
     "acorn": "^8.14.0",
@@ -62,6 +65,7 @@
     "eslint": "^9.18.0",
     "eslint-plugin-import": "^2.31.0",
     "events": "^3.3.0",
+    "globals": "^15.14.0",
     "jsdoc": "^4.0.4",
     "jsdoc-json": "^2.0.2",
     "lerna": "^8.1.9",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index a2e48efc..29624333 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -27,6 +27,15 @@ importers:
         specifier: workspace:*
         version: link:packages/xen
     devDependencies:
+      '@eslint/compat':
+        specifier: ^1.2.5
+        version: 1.2.5(eslint@9.19.0(jiti@2.4.2))
+      '@eslint/eslintrc':
+        specifier: ^3.2.0
+        version: 3.2.0
+      '@eslint/js':
+        specifier: ^9.19.0
+        version: 9.19.0
       '@tauri-apps/cli':
         specifier: ^2.2.5
         version: 2.2.7
@@ -48,6 +57,9 @@ importers:
       events:
         specifier: ^3.3.0
         version: 3.3.0
+      globals:
+        specifier: ^15.14.0
+        version: 15.14.0
       jsdoc:
         specifier: ^4.0.4
         version: 4.0.4
@@ -1646,6 +1658,15 @@ packages:
     resolution: {integrity: sha512-CCZCDJuduB9OUkFkY2IgppNZMi2lBQgD2qzwXkEia16cge2pijY/aXi96CJMquDMn3nJdlPV1A5KrJEXwfLNzQ==}
     engines: {node: ^12.0.0 || ^14.0.0 || >=16.0.0}
 
+  '@eslint/compat@1.2.5':
+    resolution: {integrity: sha512-5iuG/StT+7OfvhoBHPlmxkPA9om6aDUFgmD4+mWKAGsYt4vCe8rypneG03AuseyRHBmcCLXQtIH5S26tIoggLg==}
+    engines: {node: ^18.18.0 || ^20.9.0 || >=21.1.0}
+    peerDependencies:
+      eslint: ^9.10.0
+    peerDependenciesMeta:
+      eslint:
+        optional: true
+
   '@eslint/config-array@0.19.1':
     resolution: {integrity: sha512-fo6Mtm5mWyKjA/Chy1BYTdn5mGJoDNjC7C64ug20ADsRDGrA85bN3uK3MaKbeRkRuuIEAR5N33Jr1pbm411/PA==}
     engines: {node: ^18.18.0 || ^20.9.0 || >=21.1.0}
@@ -4450,6 +4471,10 @@ packages:
     resolution: {integrity: sha512-oahGvuMGQlPw/ivIYBjVSrWAfWLBeku5tpPE2fOPLi+WHffIWbuh2tCjhyQhTBPMf5E9jDEH4FOmTYgYwbKwtQ==}
     engines: {node: '>=18'}
 
+  globals@15.14.0:
+    resolution: {integrity: sha512-OkToC372DtlQeje9/zHIo5CT8lRP/FUgEOKBEhU4e0abL7J7CD24fD9ohiLN5hagG/kWCYj4K5oaxxtj2Z0Dig==}
+    engines: {node: '>=18'}
+
   globalthis@1.0.4:
     resolution: {integrity: sha512-DpLKbNU4WylpxJykQujfCcwYWiV/Jhm50Goo0wrVILAv5jOr9d+H+UR3PhSCD2rCCEIg0uc+G+muBTwD54JhDQ==}
     engines: {node: '>= 0.4'}
@@ -8938,6 +8963,10 @@ snapshots:
 
   '@eslint-community/regexpp@4.12.1': {}
 
+  '@eslint/compat@1.2.5(eslint@9.19.0(jiti@2.4.2))':
+    optionalDependencies:
+      eslint: 9.19.0(jiti@2.4.2)
+
   '@eslint/config-array@0.19.1':
     dependencies:
       '@eslint/object-schema': 2.1.5
@@ -12406,6 +12435,8 @@ snapshots:
 
   globals@14.0.0: {}
 
+  globals@15.14.0: {}
+
   globalthis@1.0.4:
     dependencies:
       define-properties: 1.2.1