Drop eslint and extend oxlint config including type aware rules

.oxlintrc.json

@@ -1,7 +1,13 @@
 {
   "$schema": "./node_modules/oxlint/configuration_schema.json",
   "plugins": [
-    "typescript"
+    "typescript",
+    "oxc",
+    "promise",
+    "import"
+    // these rule sets may be added later
+    // "vitest"
+    // "react"
   ],
   "categories": {
     "correctness": "error"
@@ -23,90 +29,35 @@
     "**/production/**/*",
     "**/public/**/*",
     "**/.next/**/*",
-    "**/*env.d.ts",
     "**/.pnp.cjs"
   ],
+  // see: https://oxc.rs/docs/guide/usage/linter/rules.html
   "rules": {
     "eqeqeq": "error",
     // currently in oxlint's nursery (=under development)
-    "constructor-super": "error",
-    // currently unsupported by oxlint
-    "dot-notation": "error",
-    "for-direction": "error",
-    // currently in oxlint's nursery (=under development)
     "getter-return": "error",
     "guard-for-in": "error",
-    // currently unsupported by oxlint
-    "new-parens": "error",
-    "no-async-promise-executor": "error",
+    "no-array-constructor": "error",
     "no-bitwise": "error",
-    "no-caller": "error",
     "no-case-declarations": "error",
-    "no-class-assign": "error",
-    "no-compare-neg-zero": "error",
-    "no-cond-assign": "error",
-    "no-const-assign": "error",
-    "no-constant-binary-expression": "error",
-    "no-constant-condition": "error",
-    "no-control-regex": "error",
-    "no-debugger": "error",
-    "no-delete-var": "error",
-    // currently unsupported by oxlint
-    "no-dupe-args": "error",
-    "no-dupe-class-members": "error",
-    "no-dupe-else-if": "error",
-    "no-dupe-keys": "error",
-    "no-duplicate-case": "error",
     "no-empty": "error",
     "no-empty-character-class": "error",
     "no-empty-pattern": "error",
     "no-empty-static-block": "error",
-    "no-eval": "error",
-    "no-ex-assign": "error",
     "no-explicit-any": "error",
-    "no-extra-boolean-cast": "error",
     "no-fallthrough": "error",
-    "no-func-assign": "error",
-    "no-global-assign": "error",
     "no-import-assign": "error",
     "no-inner-declarations": "off",
-    "no-invalid-regexp": "error",
-    "no-irregular-whitespace": "error",
     "no-labels": "error",
-    "no-loss-of-precision": "error",
-    // currently in oxlint's nursery (=under development)
     "no-misleading-character-class": "error",
-    // currently unsupported by oxlint
-    "no-multiple-empty-lines": ["error", {
-        "max": 1
-    }],
-    "no-new-native-nonconstructor": "error",
     "no-new-wrappers": "error",
-    "no-nonoctal-decimal-escape": "error",
-    "no-obj-calls": "error",
-    // currently unsupported by oxlint
-    "no-octal": "error",
     "no-prototype-builtins": "error",
     "no-redeclare": "error",
     "no-regex-spaces": "error",
-    "no-self-assign": "error",
-    "no-setter-return": "error",
-    "no-shadow-restricted-names": "error",
-    "no-sparse-arrays": "error",
-    "no-this-before-super": "error",
     "no-throw-literal": "error",
-    // currently unsupported by oxlint
-    "no-trailing-spaces": "error",
-    // currently in oxlint's nursery (=under development)
-    "no-undef": "off",
     "no-unexpected-multiline": "error",
     // currently in oxlint's nursery (=under development)
     "no-unreachable": "error",
-    "no-unsafe-finally": "error",
-    "no-unsafe-negation": "error",
-    "no-unsafe-optional-chaining": "error",
-    "no-unused-labels": "error",
-    "no-unused-private-class-members": "error",
     "no-unused-vars": [
       "error",
       {
@@ -115,60 +66,53 @@
         "varsIgnorePattern": "^_"
       }
     ],
-    "no-useless-backreference": "error",
-    "no-useless-catch": "error",
-    "no-useless-escape": "error",
     "no-var": "error",
-    "no-var-requires": "error",
-    "no-with": "error",
-    // currently unsupported by oxlint
     "prefer-const": "error",
     "prefer-rest-params": "error",
     "prefer-spread": "error",
-    // currently unsupported by oxlint
-    "quotes": [2, "single", {
-      "avoidEscape": true
-    }],
-    "require-yield": "error",
-    // currently unsupported by oxlint
-    "semi": [2, "always"],
-    // currently unsupported by oxlint
-    "space-before-function-paren": ["error", {
-        "anonymous": "never",
-        "asyncArrow": "always",
-        "named": "never"
-    }],
-    "use-isnan": "error",
-    "valid-typeof": "error",
-    "@typescript-eslint/ban-ts-comment": "error",
-    "no-array-constructor": "error",
-    "@typescript-eslint/adjacent-overload-signatures": "error",
-    "@typescript-eslint/array-type": [
+
+    // all typescript related rules
+    "typescript/adjacent-overload-signatures": "error",
+    "typescript/array-type": [
       "error",
       {
         "default": "array-simple"
       }
     ],
-    "@typescript-eslint/no-duplicate-enum-values": "error",
-    "@typescript-eslint/no-empty-object-type": "error",
-    "@typescript-eslint/no-extra-non-null-assertion": "error",
-    "@typescript-eslint/no-misused-new": "error",
-    "@typescript-eslint/no-namespace": "off",
-    "@typescript-eslint/no-non-null-assertion": "off",
-    "@typescript-eslint/no-non-null-asserted-optional-chain": "error",
-    "@typescript-eslint/prefer-for-of": "error",
-    "@typescript-eslint/no-require-imports": "error",
-    "@typescript-eslint/no-this-alias": "error",
-    "@typescript-eslint/no-unnecessary-type-constraint": "error",
-    "@typescript-eslint/no-unsafe-declaration-merging": "error",
-    "@typescript-eslint/no-unsafe-function-type": "error",
-    "@typescript-eslint/no-unused-expressions": "error",
-    "@typescript-eslint/no-unnecessary-condition": "error",
-    "@typescript-eslint/no-wrapper-object-types": "error",
-    "@typescript-eslint/parameter-properties": "error",
-    "@typescript-eslint/prefer-as-const": "error",
-    "@typescript-eslint/prefer-namespace-keyword": "error",
-    "@typescript-eslint/strict-boolean-expressions": "error",
-    "@typescript-eslint/triple-slash-reference": "error",
+    "typescript/ban-ts-comment": "error",
+    // currently in oxlint's nursery (=under development)
+    "typescript/dot-notation": "error",
+    "typescript/no-empty-object-type": "error",
+    "typescript/no-namespace": "off",
+    // currently in oxlint's nursery (=under development)
+    "typescript/no-unnecessary-condition": "error",
+    "typescript/no-unnecessary-type-constraint": "error",
+    "typescript/no-unsafe-function-type": "error",
+    "typescript/no-unused-expressions": "error",
+    "typescript/no-non-null-assertion": "off",
+    "typescript/no-require-imports": "error",
+    "typescript/no-var-requires": "error",
+    "typescript/parameter-properties": "error",
+    "typescript/prefer-for-of": "error",
+    "typescript/prefer-namespace-keyword": "error",
+    "typescript/prefer-nullish-coalescing": "error",
+    // currently in oxlint's nursery (=under development)
+    "typescript/prefer-optional-chain": "error",
+    "typescript/strict-boolean-expressions": [
+      "error",
+      {
+        "allowString": false,
+        "allowNumber": false,
+        "allowNullableObject": false
+      }
+    ],
+    "typescript/triple-slash-reference": "error",
+    // all import related rules
+    "import/no-duplicates": "error",
+    "import/first": "error",
+    "import/export": "error",
+    "import/default": "error",
+    "import/named": "error",
+    "import/no-unresolved": "error"
   }
 }

.vscode/extensions.json

@@ -1,6 +1,6 @@
 {
   "recommendations": [
-    "dbaeumer.vscode-eslint",
+    "oxc.oxc-vscode",
     "editorconfig.editorconfig",
     "davidanson.vscode-markdownlint",
     "vitest.explorer"

.vscode/settings.json

@@ -3,20 +3,14 @@
   "editor.guides.bracketPairs": true,
   "editor.formatOnSave": false,
   "workbench.editor.revealIfOpen": true,
+  "oxc.enable.oxlint": true,
+  "oxc.typeAware": true,
   "[javascript]": {
     "editor.formatOnSave": true,
   },
   "[typescript]": {
     "editor.formatOnSave": true,
   },
-  "eslint.codeAction.showDocumentation": {
-    "enable": true
-  },
-  "eslint.format.enable": false,
-  "eslint.validate": [
-    "javascript",
-    "typescript"
-  ],
   "[json]": {
     "editor.defaultFormatter": "vscode.json-language-features"
   },

LICENSE.header

@@ -0,0 +1,2 @@
+Copyright (c) 2026 TypeFox and others.
+Licensed under the MIT License. See LICENSE in the package root for license information.

README.md

@@ -75,7 +75,7 @@ These are the current versions of packages from this repository and their alignm
 - **monaco-languageclient**: `10.7.0` (release date: 2026-02-04)
 - **@typefox/monaco-editor-react**: `7.7.0` (release date: unrel2026-02-04eased)
 - Aligned with:
-  - **@codingame/monaco-vscode-[editor]-api**: `26.0.1`
+  - **@codingame/monaco-vscode-[editor]-api**: `26.2.1`
   - **vscode**: `1.108.2`
   - **monaco-editor**: `0.55.1`
 - **vscode-ws-jsonrpc**: `3.5.0` (release date: 2025-08-11)

docs/guides/troubleshooting.md

@@ -11,7 +11,7 @@ Whenever you use `monaco-editor`/`@codingame/monaco-vscode-editor-api` `vscode`/
 If you use pnpm or yarn, you have to add `vscode` / `@codingame/monaco-vscode-api` as direct dependency, otherwise the installation will fail:
 
 ```json
-"vscode": "npm:@codingame/monaco-vscode-extension-api@^26.0.1"
+"vscode": "npm:@codingame/monaco-vscode-extension-api@^26.2.1"
 ```
 
 ### Missing Overrides or Resolutions
@@ -23,7 +23,7 @@ To ensure all Monaco-related packages use a single, compatible version, you must
 ```json
 {
   "overrides": {
-    "monaco-editor": "npm:@codingame/monaco-vscode-editor-api@^26.0.1"
+    "monaco-editor": "npm:@codingame/monaco-vscode-editor-api@^26.2.1"
   }
 }
 ```
@@ -33,7 +33,7 @@ To ensure all Monaco-related packages use a single, compatible version, you must
 ```json
 {
   "resolutions": {
-    "monaco-editor": "npm:@codingame/monaco-vscode-editor-api@^26.0.1"
+    "monaco-editor": "npm:@codingame/monaco-vscode-editor-api@^26.2.1"
   }
 }
 ```
@@ -50,7 +50,7 @@ Additionally, if you see a message in the browser console starting with `Another
 
 ### @codingame/monaco-vscode-editor-api / monaco-editor usage
 
-When you use the libraries from this project you are no longer required to proxy `monaco-editor` like `"monaco-editor": "npm:@codingame/monaco-vscode-editor-api@^26.0.1"` in you `package.json`. You can directly use it like so:
+When you use the libraries from this project you are no longer required to proxy `monaco-editor` like `"monaco-editor": "npm:@codingame/monaco-vscode-editor-api@^26.2.1"` in you `package.json`. You can directly use it like so:
 
 ```js
 import * as monaco from '@codingame/monaco-vscode-editor-api';
@@ -60,7 +60,7 @@ If your dependency stack already contains a reference `monaco-editor` you must e
 
 ```json
 "overrides": {
-  "monaco-editor": "npm:@codingame/monaco-vscode-editor-api@^26.0.1"
+  "monaco-editor": "npm:@codingame/monaco-vscode-editor-api@^26.2.1"
 }
 ```
 

docs/installation.md

@@ -57,7 +57,7 @@ If using npm or pnpm, and your dependencies already contain a reference to `mona
 ```json
 {
   "overrides": {
-    "monaco-editor": "npm:@codingame/monaco-vscode-editor-api@^26.0.1"
+    "monaco-editor": "npm:@codingame/monaco-vscode-editor-api@^26.2.1"
   }
 }
 ```
@@ -71,7 +71,7 @@ In yarn you have to specify `resolutions` instead of `overrides`:
 ```json
 {
   "resolutions": {
-    "monaco-editor": "npm:@codingame/monaco-vscode-editor-api@^26.0.1"
+    "monaco-editor": "npm:@codingame/monaco-vscode-editor-api@^26.2.1"
   }
 }
 ```
@@ -83,17 +83,17 @@ If using pnpm, you have to add more transitive dependencies that npm or yarn aut
 ```json
 {
   "dependencies": {
-    "@codingame/monaco-vscode-api": "^26.0.1",
-    "@codingame/monaco-vscode-configuration-service-override": "^26.0.1",
-    "@codingame/monaco-vscode-editor-api": "^26.0.1",
-    "@codingame/monaco-vscode-editor-service-override": "^26.0.1",
-    "@codingame/monaco-vscode-extension-api": "^26.0.1",
-    "@codingame/monaco-vscode-extensions-service-override": "^26.0.1",
-    "@codingame/monaco-vscode-languages-service-override": "^26.0.1",
-    "@codingame/monaco-vscode-localization-service-override": "^26.0.1",
-    "@codingame/monaco-vscode-log-service-override": "^26.0.1",
-    "@codingame/monaco-vscode-model-service-override": "^26.0.1",
-    "vscode": "npm:@codingame/monaco-vscode-extension-api@^26.0.1"
+    "@codingame/monaco-vscode-api": "^26.2.1",
+    "@codingame/monaco-vscode-configuration-service-override": "^26.2.1",
+    "@codingame/monaco-vscode-editor-api": "^26.2.1",
+    "@codingame/monaco-vscode-editor-service-override": "^26.2.1",
+    "@codingame/monaco-vscode-extension-api": "^26.2.1",
+    "@codingame/monaco-vscode-extensions-service-override": "^26.2.1",
+    "@codingame/monaco-vscode-languages-service-override": "^26.2.1",
+    "@codingame/monaco-vscode-localization-service-override": "^26.2.1",
+    "@codingame/monaco-vscode-log-service-override": "^26.2.1",
+    "@codingame/monaco-vscode-model-service-override": "^26.2.1",
+    "vscode": "npm:@codingame/monaco-vscode-extension-api@^26.2.1"
   }
 }
 ```

docs/oxlint.md

@@ -9,32 +9,31 @@ Useful links:
 
 ## Eslint to Oxlint migration results
 
-Performed on 2025-11-26.
-
-```shell
-unsupported rule, but in development: constructor-super
-unsupported rule, but in development: getter-return
-unsupported rule: no-dupe-args
-unsupported rule, but in development: no-misleading-character-class
-unsupported rule: no-octal
-unsupported rule, but in development: no-undef
-unsupported rule, but in development: no-unreachable
-unsupported rule: prefer-const
-unsupported rule: dot-notation
-unsupported rule: new-parens
-unsupported rule: no-multiple-empty-lines
-unsupported rule: no-trailing-spaces
-unsupported rule: space-before-function-paren
-unsupported rule: semi
-unsupported rule: quotes
-unsupported rule: @typescript-eslint/parameter-properties
-unsupported rule: @typescript-eslint/no-unnecessary-condition
-```
+Performed on 2025-11-26 and updated 2026-02-20.
+
+- unsupported rule: no-dupe-args
+  - Not needed in modern code, strict is enforced by tsc
+- unsupported rule: no-octal
+  - Not needed in modern code, strict is enforced by tsc
+- unsupported rule, but in development: no-undef
+  - Not needed, handled by tsc
+- unsupported rule: dot-notation
+  - Replaced by `typescript/dot-notation`
+- unsupported rule: new-parens
+  - Is handled automatically by oxfmt
+- unsupported rule: no-multiple-empty-lines
+  - Is handled automatically by oxfmt
+- unsupported rule: no-trailing-spaces
+  - Is handled automatically by oxfmt
+- unsupported rule: space-before-function-paren
+  - Is handled automatically by oxfmt
+- unsupported rule: semi
+  - Is handled automatically by oxfmt
+- unsupported rule: quotes
+  - Is handled by oxfmt via config `"singleQuote": true`
 
 ## Changes
 
-- Replaced `@typescript-eslint/no-var-requires` with `no-var-requires`
-- Turned of recommended rule `no-undef` after migration
 - All rules in nursery (=under development) and unsupported rules are accompanied by a comment in [.oxlintrc.json](../.oxlintrc.json)
-- All rules unsupported by oxlint are still contained in [eslint.config.mjs](../eslint.config.mjs) and applied by eslint.
-- JsPlugins are instable in oxlint, therefore they are still contained in [eslint.config.mjs](../eslint.config.mjs) and applied by eslint.
+- 2026-02-20: Deleted eslint and all plugins
+- 2026-03-04: Fixed all type aware issues, added import rules and removed all default rules