failing to upgrade eslint

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",
@@ -55,16 +55,19 @@
     "@strudel/xen": "workspace:*"
   },
   "devDependencies": {
+    "@eslint/compat": "^1.2.1",
+    "@eslint/eslintrc": "^3.1.0",
+    "@eslint/js": "^9.13.0",
     "@tauri-apps/cli": "^1.5.9",
     "@vitest/ui": "^2.1.3",
     "acorn": "^8.13.0",
-    "dependency-tree": "^10.0.9",
-    "eslint": "^8.56.0",
+    "dependency-tree": "^11.0.1",
+    "eslint": "^9.13.0",
     "eslint-plugin-import": "^2.31.0",
     "events": "^3.3.0",
+    "globals": "^15.11.0",
     "jsdoc": "^4.0.3",
     "jsdoc-json": "^2.0.2",
-    "jsdoc-to-markdown": "^8.0.0",
     "lerna": "^8.1.8",
     "prettier": "^3.3.3",
     "rollup-plugin-visualizer": "^5.12.0",