upgrade to eslint v10 (#34054)

* upgrade from eslint version 8 to eslint version 10 * remove unsupported eslint-env directive * include jsx files in latexqc linting * use basePath and extends to maintain paths in writefull eslint * fix yarn.lock with ./bin/yarn install * preserve existing glob patterns in web eslint config * restore original comments * fix worker path * corrected comment about eslint-plugin-mocha * remove unused imports * remove unused import of includeIgnoreFile * switch to individual eslit.config.mjs files * fix lint errors on eslint.config.mjs in web * update build scripts for eslint.config.mjs * update volumes for RUN_LINTING_CI_MONOREPO in web Makefile updated manually as this makefile is not autogenerated the RUN_LINTING_CI_MONOREPO command is only used for prettier, not eslint, but updating for consistency. * migrate from mocha/no-skipped-tests to mocha/no-pending-tests see https://github.com/lo1tuma/eslint-plugin-mocha/pull/365 "rule no-skipped-tests has been removed, its functionality has been merged into the existing no-pending-tests rule" GitOrigin-RevId: 2c8f25c8049a0dba374a51df1214286bb5093a51
2026-06-02 11:42:59 +01:00
parent 98bd09c31d
commit f8c7e092fa
31 changed files with 1513 additions and 1212 deletions
@@ -1,4 +1,10 @@
+const pkg = require('./package.json')
+
 module.exports = {
+  meta: {
+    name: pkg.name,
+    version: pkg.version,
+  },
  rules: {
    'no-unnecessary-trans': require('./no-unnecessary-trans'),
    'prefer-kebab-url': require('./prefer-kebab-url'),
@@ -8,10 +8,10 @@
    "lodash": "^4.18.1"
  },
  "devDependencies": {
-    "@typescript-eslint/parser": "^8.50.0"
+    "@typescript-eslint/parser": "^8.59.4"
  },
  "peerDependencies": {
-    "eslint": "^8.51.0"
+    "eslint": "^10.4.0"
  },
  "scripts": {
    "test": "node rules.test.js"
@@ -22,7 +22,7 @@ module.exports = {
    },
  },
  create(context) {
-    const currentFilePath = context.getFilename()
+    const currentFilePath = context.filename
    // ESLint can sometimes pass <text> or <input> for snippets not in a file
    if (currentFilePath === '<text>' || currentFilePath === '<input>') {
      return {}
@@ -81,9 +81,10 @@ module.exports = {
            typeof firstArg.value !== 'string'
          ) {
            if (firstArg.type === 'Identifier') {
-              const variable = context
-                .getScope()
-                .variables.find(v => v.name === firstArg.name)
+              const scope = context.sourceCode.getScope(node)
+              const variable = scope.variables.find(
+                v => v.name === firstArg.name
+              )
              if (
                variable &&
                variable.defs.length > 0 &&
@@ -1,4 +1,5 @@
 const { RuleTester } = require('eslint')
+const tsParser = require('@typescript-eslint/parser')
 const noThrowInCallback = require('./no-throw-in-callback')
 const preferKebabUrl = require('./prefer-kebab-url')
 const noUnnecessaryTrans = require('./no-unnecessary-trans')
@@ -8,10 +9,10 @@ const viDoMockValidPath = require('./require-vi-doMock-valid-path')
 const requireCioSnakeCaseProperties = require('./require-cio-snake-case-properties')

 const ruleTester = new RuleTester({
-  parser: require.resolve('@typescript-eslint/parser'),
-  parserOptions: {
+  languageOptions: {
+    parser: tsParser,
    ecmaVersion: 'latest',
-    ecmaFeatures: { jsx: true },
+    parserOptions: { ecmaFeatures: { jsx: true } },
  },
 })

@@ -33,19 +34,27 @@ ruleTester.run('prefer-kebab-url', preferKebabUrl, {
  invalid: [
    {
      code: `app.get('/fooBar')`,
-      errors: [{ message: 'Route path should be in kebab-case.' }],
+      errors: [
+        { message: 'Route path should be in kebab-case.', suggestions: 1 },
+      ],
    },
    {
      code: `app.get('/fooBar/:id')`,
-      errors: [{ message: 'Route path should be in kebab-case.' }],
+      errors: [
+        { message: 'Route path should be in kebab-case.', suggestions: 1 },
+      ],
    },
    {
      code: `webRouter.get('/foo_bar/:id/FooBar/:name/fooBar')`,
-      errors: [{ message: 'Route path should be in kebab-case.' }],
+      errors: [
+        { message: 'Route path should be in kebab-case.', suggestions: 1 },
+      ],
    },
    {
      code: `router.get(/^\\/downLoad\\/pro-ject\\/([^/]*)\\/OutPut\\/out-put\\.pdf$/)`,
-      errors: [{ message: 'Route path should be in kebab-case.' }],
+      errors: [
+        { message: 'Route path should be in kebab-case.', suggestions: 1 },
+      ],
    },
  ],
 })
@@ -153,6 +162,7 @@ ruleTester.run('domock-require-valid-path', viDoMockValidPath, {
        {
          message:
            'The path "./require-vi-doMock-valid-path2" in vi.doMock() cannot be resolved relative to the current file.',
+          suggestions: [],
        },
      ],
    },
@@ -163,6 +173,7 @@ ruleTester.run('domock-require-valid-path', viDoMockValidPath, {
        {
          message:
            'The first argument of vi.doMock() must be (or resolve to) a string literal representing a path.',
+          suggestions: [],
        },
      ],
    },
@@ -3,33 +3,35 @@
  "private": true,
  "packageManager": "yarn@4.14.1",
  "devDependencies": {
+    "@eslint/compat": "^2.1.0",
+    "@eslint/js": "^10.0.1",
    "@overleaf/eslint-plugin": "workspace:*",
    "@prettier/plugin-pug": "^3.4.0",
    "@types/chai": "^4.3.0",
    "@types/chai-as-promised": "^7.1.8",
    "@types/mocha": "^10.0.6",
    "@types/multer": "^2.1.0",
-    "@typescript-eslint/eslint-plugin": "8.50.0",
-    "@typescript-eslint/parser": "^8.50.0",
+    "@typescript-eslint/eslint-plugin": "^8.59.4",
+    "@typescript-eslint/parser": "^8.59.4",
    "@vitest/eslint-plugin": "^1.5.0",
-    "eslint": "^8.15.0",
-    "eslint-config-prettier": "^8.5.0",
-    "eslint-config-standard": "^17.0.0",
-    "eslint-plugin-chai-expect": "^3.0.0",
-    "eslint-plugin-chai-friendly": "^0.7.2",
-    "eslint-plugin-cypress": "^2.15.1",
-    "eslint-plugin-import": "^2.26.0",
-    "eslint-plugin-mocha": "^10.1.0",
-    "eslint-plugin-n": "^15.7.0",
-    "eslint-plugin-prettier": "^4.0.0",
-    "eslint-plugin-promise": "^6.0.0",
+    "eslint": "^10.4.0",
+    "eslint-config-prettier": "^10.0.1",
+    "eslint-formatter-unix": "^8.40.0",
+    "eslint-plugin-chai-expect": "^4.0.0",
+    "eslint-plugin-chai-friendly": "^1.1.0",
+    "eslint-plugin-cypress": "^4.1.0",
+    "eslint-plugin-import": "^2.32.0",
+    "eslint-plugin-mocha": "^11.0.0",
+    "eslint-plugin-n": "^18.0.0",
+    "eslint-plugin-promise": "^7.2.1",
    "eslint-plugin-unicorn": "^56.0.0",
+    "globals": "^17.6.0",
    "prettier": "3.7.4",
    "prettier-plugin-groovy": "0.2.1",
    "typescript": "^5.9.3"
  },
  "engines": {
-    "node": ">=20.0.0"
+    "node": ">=20.19.0"
  },
  "resolutions": {
    "@xmldom/xmldom": "0.8.13",
@@ -1,29 +0,0 @@
-{
-  "extends": [
-    "eslint:recommended",
-    "standard",
-    "prettier"
-  ],
-  "plugins": [
-    "unicorn"
-  ],
-  "parserOptions": {
-    "ecmaVersion": 2020
-  },
-  "env": {
-    "node": true
-  },
-  "rules": {
-    // Do not allow importing of implicit dependencies.
-    "import/no-extraneous-dependencies": "error",
-    "unicorn/prefer-node-protocol": "error"
-  },
-  "overrides": [
-    // Extra rules for Cypress tests
-    { "files": ["**/*.spec.ts"], "extends": ["plugin:cypress/recommended"] }
-  ],
-  "ignorePatterns": [
-    "hotfix/",
-    "develop/"
-  ]
-}
@@ -0,0 +1,33 @@
+import { defineConfig, globalIgnores } from 'eslint/config'
+import cypress from 'eslint-plugin-cypress/flat'
+import path from 'node:path'
+import baseConfig from '../eslint.config.mjs'
+
+const ROOT_DIR = path.resolve(import.meta.dirname, '..')
+
+export default defineConfig([
+  globalIgnores(['**/hotfix/', '**/develop/']),
+  {
+    basePath: ROOT_DIR,
+    extends: baseConfig,
+    languageOptions: {
+      ecmaVersion: 2020,
+    },
+  },
+  {
+    // The cypress block in baseConfig has patterns rooted at the
+    // monorepo root (`server-ce/test/helpers/*.ts`). When ESLint loads
+    // this file (server-ce/eslint.config.mjs) as the closest config --
+    // which happens when running `yarn run lint` from
+    // /overleaf/server-ce/test/ -- patterns from baseConfig are
+    // resolved relative to /overleaf/server-ce/, so those cross-dir
+    // patterns don't match. Re-declare with paths relative to this
+    // config file.
+    files: [
+      'test/helpers/*.ts',
+      'test/cypress/support/*.{js,jsx,mjs,cjs,ts,tsx}',
+      '**/*.spec.ts',
+    ],
+    ...cypress.configs.recommended,
+  },
+])
@@ -333,7 +333,7 @@ describe('SandboxedCompiles', function () {
  })

  // https://github.com/overleaf/internal/issues/20216
-  // eslint-disable-next-line mocha/no-skipped-tests
+  // eslint-disable-next-line mocha/no-pending-tests
  describe.skip('unavailable in CE', function () {
    if (isExcludedBySharding('CE_CUSTOM_1')) return
    startWith({ pro: false, vars: enabledVars, resetData: true })
@@ -70,8 +70,8 @@ clean:
 RUN_LINTING = ../../bin/run -w /overleaf/services/$(PROJECT_NAME) monorepo yarn run --silent
 RUN_LINTING_MONOREPO = ../../bin/run monorepo yarn run --silent

-RUN_LINTING_CI = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/.eslintignore:/overleaf/.eslintignore --volume $(MONOREPO)/.eslintrc:/overleaf/.eslintrc --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/chat/reports:/overleaf/services/chat/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache $(IMAGE_CI) yarn run --silent
-RUN_LINTING_CI_MONOREPO = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/.eslintignore:/overleaf/.eslintignore --volume $(MONOREPO)/.eslintrc:/overleaf/.eslintrc --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/chat/reports:/overleaf/services/chat/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache -w /overleaf $(IMAGE_CI) yarn run --silent
+RUN_LINTING_CI = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/eslint.config.mjs:/overleaf/eslint.config.mjs --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/chat/reports:/overleaf/services/chat/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache $(IMAGE_CI) yarn run --silent
+RUN_LINTING_CI_MONOREPO = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/eslint.config.mjs:/overleaf/eslint.config.mjs --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/chat/reports:/overleaf/services/chat/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache -w /overleaf $(IMAGE_CI) yarn run --silent

 SHELLCHECK_OPTS = \
 	--shell=bash \
@@ -71,8 +71,8 @@ clean:
 RUN_LINTING = ../../bin/run -w /overleaf/services/$(PROJECT_NAME) monorepo yarn run --silent
 RUN_LINTING_MONOREPO = ../../bin/run monorepo yarn run --silent

-RUN_LINTING_CI = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/.eslintignore:/overleaf/.eslintignore --volume $(MONOREPO)/.eslintrc:/overleaf/.eslintrc --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/clsi/reports:/overleaf/services/clsi/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache $(IMAGE_CI) yarn run --silent
-RUN_LINTING_CI_MONOREPO = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/.eslintignore:/overleaf/.eslintignore --volume $(MONOREPO)/.eslintrc:/overleaf/.eslintrc --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/clsi/reports:/overleaf/services/clsi/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache -w /overleaf $(IMAGE_CI) yarn run --silent
+RUN_LINTING_CI = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/eslint.config.mjs:/overleaf/eslint.config.mjs --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/clsi/reports:/overleaf/services/clsi/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache $(IMAGE_CI) yarn run --silent
+RUN_LINTING_CI_MONOREPO = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/eslint.config.mjs:/overleaf/eslint.config.mjs --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/clsi/reports:/overleaf/services/clsi/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache -w /overleaf $(IMAGE_CI) yarn run --silent

 SHELLCHECK_OPTS = \
 	--shell=bash \
@@ -72,8 +72,8 @@ clean:
 RUN_LINTING = ../../bin/run -w /overleaf/services/$(PROJECT_NAME) monorepo yarn run --silent
 RUN_LINTING_MONOREPO = ../../bin/run monorepo yarn run --silent

-RUN_LINTING_CI = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/.eslintignore:/overleaf/.eslintignore --volume $(MONOREPO)/.eslintrc:/overleaf/.eslintrc --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/docstore/reports:/overleaf/services/docstore/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache $(IMAGE_CI) yarn run --silent
-RUN_LINTING_CI_MONOREPO = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/.eslintignore:/overleaf/.eslintignore --volume $(MONOREPO)/.eslintrc:/overleaf/.eslintrc --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/docstore/reports:/overleaf/services/docstore/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache -w /overleaf $(IMAGE_CI) yarn run --silent
+RUN_LINTING_CI = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/eslint.config.mjs:/overleaf/eslint.config.mjs --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/docstore/reports:/overleaf/services/docstore/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache $(IMAGE_CI) yarn run --silent
+RUN_LINTING_CI_MONOREPO = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/eslint.config.mjs:/overleaf/eslint.config.mjs --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/docstore/reports:/overleaf/services/docstore/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache -w /overleaf $(IMAGE_CI) yarn run --silent

 SHELLCHECK_OPTS = \
 	--shell=bash \
@@ -73,8 +73,8 @@ clean:
 RUN_LINTING = ../../bin/run -w /overleaf/services/$(PROJECT_NAME) monorepo yarn run --silent
 RUN_LINTING_MONOREPO = ../../bin/run monorepo yarn run --silent

-RUN_LINTING_CI = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/.eslintignore:/overleaf/.eslintignore --volume $(MONOREPO)/.eslintrc:/overleaf/.eslintrc --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/document-updater/reports:/overleaf/services/document-updater/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache $(IMAGE_CI) yarn run --silent
-RUN_LINTING_CI_MONOREPO = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/.eslintignore:/overleaf/.eslintignore --volume $(MONOREPO)/.eslintrc:/overleaf/.eslintrc --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/document-updater/reports:/overleaf/services/document-updater/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache -w /overleaf $(IMAGE_CI) yarn run --silent
+RUN_LINTING_CI = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/eslint.config.mjs:/overleaf/eslint.config.mjs --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/document-updater/reports:/overleaf/services/document-updater/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache $(IMAGE_CI) yarn run --silent
+RUN_LINTING_CI_MONOREPO = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/eslint.config.mjs:/overleaf/eslint.config.mjs --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/document-updater/reports:/overleaf/services/document-updater/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache -w /overleaf $(IMAGE_CI) yarn run --silent

 SHELLCHECK_OPTS = \
 	--shell=bash \
@@ -70,8 +70,8 @@ clean:
 RUN_LINTING = ../../bin/run -w /overleaf/services/$(PROJECT_NAME) monorepo yarn run --silent
 RUN_LINTING_MONOREPO = ../../bin/run monorepo yarn run --silent

-RUN_LINTING_CI = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/.eslintignore:/overleaf/.eslintignore --volume $(MONOREPO)/.eslintrc:/overleaf/.eslintrc --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/filestore/reports:/overleaf/services/filestore/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache $(IMAGE_CI) yarn run --silent
-RUN_LINTING_CI_MONOREPO = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/.eslintignore:/overleaf/.eslintignore --volume $(MONOREPO)/.eslintrc:/overleaf/.eslintrc --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/filestore/reports:/overleaf/services/filestore/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache -w /overleaf $(IMAGE_CI) yarn run --silent
+RUN_LINTING_CI = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/eslint.config.mjs:/overleaf/eslint.config.mjs --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/filestore/reports:/overleaf/services/filestore/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache $(IMAGE_CI) yarn run --silent
+RUN_LINTING_CI_MONOREPO = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/eslint.config.mjs:/overleaf/eslint.config.mjs --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/filestore/reports:/overleaf/services/filestore/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache -w /overleaf $(IMAGE_CI) yarn run --silent

 SHELLCHECK_OPTS = \
 	--shell=bash \
@@ -1,2 +0,0 @@
-archive/
-
@@ -75,8 +75,8 @@ clean:
 RUN_LINTING = ../../bin/run -w /overleaf/services/$(PROJECT_NAME) monorepo yarn run --silent
 RUN_LINTING_MONOREPO = ../../bin/run monorepo yarn run --silent

-RUN_LINTING_CI = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/.eslintignore:/overleaf/.eslintignore --volume $(MONOREPO)/.eslintrc:/overleaf/.eslintrc --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/history-v1/reports:/overleaf/services/history-v1/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache $(IMAGE_CI) yarn run --silent
-RUN_LINTING_CI_MONOREPO = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/.eslintignore:/overleaf/.eslintignore --volume $(MONOREPO)/.eslintrc:/overleaf/.eslintrc --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/history-v1/reports:/overleaf/services/history-v1/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache -w /overleaf $(IMAGE_CI) yarn run --silent
+RUN_LINTING_CI = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/eslint.config.mjs:/overleaf/eslint.config.mjs --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/history-v1/reports:/overleaf/services/history-v1/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache $(IMAGE_CI) yarn run --silent
+RUN_LINTING_CI_MONOREPO = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/eslint.config.mjs:/overleaf/eslint.config.mjs --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/history-v1/reports:/overleaf/services/history-v1/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache -w /overleaf $(IMAGE_CI) yarn run --silent

 SHELLCHECK_OPTS = \
 	--shell=bash \
@@ -507,7 +507,7 @@ describe('project controller', function () {
    })
  })

-  // eslint-disable-next-line mocha/no-skipped-tests
+  // eslint-disable-next-line mocha/no-pending-tests
  describe.skip('getLatestContent', function () {
    // TODO: remove this endpoint entirely, see
    // https://github.com/overleaf/write_latex/pull/5120#discussion_r244291862
@@ -71,8 +71,8 @@ clean:
 RUN_LINTING = ../../bin/run -w /overleaf/services/$(PROJECT_NAME) monorepo yarn run --silent
 RUN_LINTING_MONOREPO = ../../bin/run monorepo yarn run --silent

-RUN_LINTING_CI = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/.eslintignore:/overleaf/.eslintignore --volume $(MONOREPO)/.eslintrc:/overleaf/.eslintrc --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/notifications/reports:/overleaf/services/notifications/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache $(IMAGE_CI) yarn run --silent
-RUN_LINTING_CI_MONOREPO = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/.eslintignore:/overleaf/.eslintignore --volume $(MONOREPO)/.eslintrc:/overleaf/.eslintrc --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/notifications/reports:/overleaf/services/notifications/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache -w /overleaf $(IMAGE_CI) yarn run --silent
+RUN_LINTING_CI = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/eslint.config.mjs:/overleaf/eslint.config.mjs --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/notifications/reports:/overleaf/services/notifications/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache $(IMAGE_CI) yarn run --silent
+RUN_LINTING_CI_MONOREPO = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/eslint.config.mjs:/overleaf/eslint.config.mjs --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/notifications/reports:/overleaf/services/notifications/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache -w /overleaf $(IMAGE_CI) yarn run --silent

 SHELLCHECK_OPTS = \
 	--shell=bash \
@@ -1 +0,0 @@
-app/lib/*.js
@@ -74,8 +74,8 @@ clean:
 RUN_LINTING = ../../bin/run -w /overleaf/services/$(PROJECT_NAME) monorepo yarn run --silent
 RUN_LINTING_MONOREPO = ../../bin/run monorepo yarn run --silent

-RUN_LINTING_CI = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/.eslintignore:/overleaf/.eslintignore --volume $(MONOREPO)/.eslintrc:/overleaf/.eslintrc --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/document-updater/app/js/types.ts:/overleaf/services/document-updater/app/js/types.ts --volume $(MONOREPO)/services/project-history/reports:/overleaf/services/project-history/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache $(IMAGE_CI) yarn run --silent
-RUN_LINTING_CI_MONOREPO = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/.eslintignore:/overleaf/.eslintignore --volume $(MONOREPO)/.eslintrc:/overleaf/.eslintrc --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/document-updater/app/js/types.ts:/overleaf/services/document-updater/app/js/types.ts --volume $(MONOREPO)/services/project-history/reports:/overleaf/services/project-history/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache -w /overleaf $(IMAGE_CI) yarn run --silent
+RUN_LINTING_CI = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/eslint.config.mjs:/overleaf/eslint.config.mjs --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/document-updater/app/js/types.ts:/overleaf/services/document-updater/app/js/types.ts --volume $(MONOREPO)/services/project-history/reports:/overleaf/services/project-history/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache $(IMAGE_CI) yarn run --silent
+RUN_LINTING_CI_MONOREPO = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/eslint.config.mjs:/overleaf/eslint.config.mjs --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/document-updater/app/js/types.ts:/overleaf/services/document-updater/app/js/types.ts --volume $(MONOREPO)/services/project-history/reports:/overleaf/services/project-history/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache -w /overleaf $(IMAGE_CI) yarn run --silent

 SHELLCHECK_OPTS = \
 	--shell=bash \
@@ -1,5 +1,3 @@
-/* eslint-env mongo */
-
 // add a TTL index to expire entries for completed resyncs in the
 // projectHistorySyncState collection.  The entries should only be expired if
 // resyncProjectStructure is false and resyncDocContents is a zero-length array.
@@ -70,8 +70,8 @@ clean:
 RUN_LINTING = ../../bin/run -w /overleaf/services/$(PROJECT_NAME) monorepo yarn run --silent
 RUN_LINTING_MONOREPO = ../../bin/run monorepo yarn run --silent

-RUN_LINTING_CI = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/.eslintignore:/overleaf/.eslintignore --volume $(MONOREPO)/.eslintrc:/overleaf/.eslintrc --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/real-time/reports:/overleaf/services/real-time/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache $(IMAGE_CI) yarn run --silent
-RUN_LINTING_CI_MONOREPO = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/.eslintignore:/overleaf/.eslintignore --volume $(MONOREPO)/.eslintrc:/overleaf/.eslintrc --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/real-time/reports:/overleaf/services/real-time/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache -w /overleaf $(IMAGE_CI) yarn run --silent
+RUN_LINTING_CI = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/eslint.config.mjs:/overleaf/eslint.config.mjs --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/real-time/reports:/overleaf/services/real-time/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache $(IMAGE_CI) yarn run --silent
+RUN_LINTING_CI_MONOREPO = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/eslint.config.mjs:/overleaf/eslint.config.mjs --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/real-time/reports:/overleaf/services/real-time/reports --volume $(MONOREPO)/node_modules/.cache:/overleaf/node_modules/.cache -w /overleaf $(IMAGE_CI) yarn run --silent

 SHELLCHECK_OPTS = \
 	--shell=bash \
@@ -1,12 +0,0 @@
-# NOTE: changing paths may require updating them in the Makefile too.
-data/
-scripts/translations/.cache/
-node_modules
-frontend/js/vendor
-modules/**/frontend/js/vendor
-/public/
-frontend/js/features/source-editor/lezer-latex/latex.mjs
-frontend/js/features/source-editor/lezer-latex/latex.terms.mjs
-frontend/js/features/source-editor/lezer-bibtex/bibtex.mjs
-frontend/js/features/source-editor/lezer-bibtex/bibtex.terms.mjs
-frontend/js/features/source-editor/hunspell/wasm/hunspell.mjs
@@ -1,665 +0,0 @@
-const _ = require('lodash')
-const confusingBrowserGlobals = require('confusing-browser-globals')
-const globals = require('globals')
-
-module.exports = {
-  root: true,
-  parser: '@typescript-eslint/parser',
-  extends: [
-    'eslint:recommended',
-    'plugin:@typescript-eslint/recommended',
-    'standard',
-    'prettier',
-    'plugin:storybook/recommended',
-  ],
-  plugins: ['@overleaf'],
-  env: {
-    es2020: true,
-  },
-  settings: {
-    // Tell eslint-plugin-react to detect which version of React we are using
-    react: {
-      version: 'detect',
-    },
-  },
-  rules: {
-    'no-constant-binary-expression': 'error',
-    'no-restricted-globals': ['error', ...confusingBrowserGlobals],
-
-    // do not allow importing of implicit dependencies.
-    'import/no-extraneous-dependencies': 'error',
-
-    '@overleaf/prefer-kebab-url': 'error',
-    '@overleaf/require-cio-snake-case-properties': 'error',
-
-    // disable some TypeScript rules
-    '@typescript-eslint/no-var-requires': 'off',
-    '@typescript-eslint/no-unused-vars': 'off',
-    '@typescript-eslint/no-empty-function': 'off',
-    '@typescript-eslint/no-explicit-any': 'off',
-    '@typescript-eslint/no-this-alias': 'off',
-    '@typescript-eslint/no-non-null-assertion': 'off',
-    '@typescript-eslint/ban-ts-comment': 'off',
-
-    'no-use-before-define': 'off',
-    '@typescript-eslint/no-use-before-define': [
-      'error',
-      { functions: false, classes: false, variables: false },
-    ],
-    'react-hooks/exhaustive-deps': [
-      'warn',
-      {
-        additionalHooks: '(useCommandProvider)',
-      },
-    ],
-  },
-  overrides: [
-    // NOTE: changing paths may require updating them in the Makefile too.
-    {
-      // Node
-      files: [
-        '**/app/src/**/*.{js,mjs}',
-        'app.{js,mjs}',
-        'i18next-scanner.config.js',
-        'scripts/**/*.{js,mjs}',
-        'webpack.config*.js',
-      ],
-      env: {
-        node: true,
-      },
-    },
-    {
-      // Test specific rules
-      files: ['**/test/**/*.*'],
-      excludedFiles: [
-        '**/test/unit/src/**/*.test.mjs',
-        'test/unit/bootstrap.mjs',
-      ], // exclude vitest files
-      plugins: ['mocha', 'chai-expect', 'chai-friendly'],
-      env: {
-        mocha: true,
-      },
-      rules: {
-        // mocha-specific rules
-        'mocha/handle-done-callback': 'error',
-        'mocha/no-exclusive-tests': 'error',
-        'mocha/no-global-tests': 'error',
-        'mocha/no-identical-title': 'error',
-        'mocha/no-nested-tests': 'error',
-        'mocha/no-pending-tests': 'error',
-        'mocha/no-skipped-tests': 'error',
-        'mocha/no-mocha-arrows': 'error',
-
-        // Swap the no-unused-expressions rule with a more chai-friendly one
-        'no-unused-expressions': 'off',
-        'chai-friendly/no-unused-expressions': 'error',
-
-        // chai-specific rules
-        'chai-expect/missing-assertion': 'error',
-        'chai-expect/terminating-properties': 'error',
-
-        // prefer-arrow-callback applies to all callbacks, not just ones in mocha tests.
-        // we don't enforce this at the top-level - just in tests to manage `this` scope
-        // based on mocha's context mechanism
-        'mocha/prefer-arrow-callback': 'error',
-
-        '@typescript-eslint/no-unused-expressions': 'off',
-      },
-    },
-    {
-      files: ['**/test/unit/src/**/*.test.mjs', 'test/unit/bootstrap.mjs'],
-      env: {
-        jest: true, // best match for vitest API etc.
-      },
-      plugins: ['@vitest', 'chai-expect', 'chai-friendly'], // still using chai for now
-      rules: {
-        // vitest-specific rules
-        '@vitest/no-focused-tests': 'error',
-        '@vitest/no-disabled-tests': 'error',
-
-        // Swap the no-unused-expressions rule with a more chai-friendly one
-        'no-unused-expressions': 'off',
-        'chai-friendly/no-unused-expressions': 'error',
-
-        // chai-specific rules
-        'chai-expect/missing-assertion': 'error',
-        'chai-expect/terminating-properties': 'error',
-        '@typescript-eslint/no-unused-expressions': 'off',
-        '@overleaf/require-vi-doMock-valid-path': 'error',
-      },
-    },
-    {
-      // ES specific rules
-      files: [
-        '**/app/src/**/*.mjs',
-        'modules/*/index.mjs',
-        'app.mjs',
-        'scripts/**/*.mjs',
-        'migrations/**/*.mjs',
-        '**/test/acceptance/src/**/*.mjs',
-        '**/test/unit/src/**/*.mjs',
-      ],
-      excludedFiles: [
-        // migration template file
-        'migrations/lib/template.mjs',
-      ],
-      parserOptions: {
-        sourceType: 'module',
-      },
-      plugins: ['unicorn'],
-      rules: {
-        'import/no-unresolved': [
-          'error',
-          {
-            // eslint-plugin-import does not support exports directive in package.json
-            // https://github.com/import-js/eslint-plugin-import/issues/1810
-            ignore: ['^p-queue$'],
-          },
-        ],
-        'import/named': 'error',
-        'import/default': 'error',
-        'import/extensions': [
-          'error',
-          'ignorePackages',
-          {
-            js: 'always',
-            mjs: 'always',
-          },
-        ],
-        'unicorn/prefer-module': 'error',
-        'unicorn/prefer-node-protocol': 'error',
-      },
-    },
-    {
-      // Backend specific rules
-      files: ['**/app/src/**/*.{js,mjs}', 'app.{js,mjs}'],
-      parserOptions: {
-        tsconfigRootDir: __dirname,
-        project: './tsconfig.backend.json',
-      },
-      rules: {
-        // do not allow importing of implicit dependencies.
-        'import/no-extraneous-dependencies': [
-          'error',
-          {
-            // do not allow importing of devDependencies.
-            devDependencies: false,
-          },
-        ],
-        'no-restricted-syntax': [
-          'error',
-          // do not allow node-fetch in backend code
-          {
-            selector:
-              "CallExpression[callee.name='require'] > .arguments[value='node-fetch']",
-            message:
-              'Requiring node-fetch is not allowed in production services, please use fetch-utils.',
-          },
-          // mongoose populate must set fields to populate
-          {
-            selector:
-              "CallExpression[callee.property.name='populate'][arguments.length<2]",
-            message:
-              "Populate without a second argument returns the whole document. Use populate('field',['prop1','prop2']) instead",
-          },
-          // Require `new` when constructing ObjectId (For mongo + mongoose upgrade)
-          {
-            selector:
-              "CallExpression[callee.name='ObjectId'], CallExpression[callee.property.name='ObjectId']",
-            message:
-              'Construct ObjectId with `new ObjectId()` instead of `ObjectId()`',
-          },
-          // Require `new` when mapping a list of ids to a list of ObjectId (For mongo + mongoose upgrade)
-          {
-            selector:
-              "CallExpression[callee.property.name='map'] Identifier[name='ObjectId']:first-child, CallExpression[callee.property.name='map'] MemberExpression[property.name='ObjectId']:first-child",
-            message:
-              "Don't map ObjectId directly. Use `id => new ObjectId(id)` instead",
-          },
-          // Catch incorrect usage of `await db.collection.find()`
-          {
-            selector:
-              "AwaitExpression > CallExpression > MemberExpression[property.name='find'][object.object.name='db']",
-            message:
-              'Mongo find returns a cursor not a promise, use `for await (const result of cursor)` or `.toArray()` instead.',
-          },
-        ],
-        '@typescript-eslint/no-floating-promises': [
-          'error',
-          { checkThenables: true },
-        ],
-      },
-    },
-    {
-      // Backend scripts specific rules
-      files: ['**/scripts/**/*.{js,mjs}'],
-      rules: {
-        'no-restricted-syntax': [
-          'error',
-          // Require `new` when constructing ObjectId (For mongo + mongoose upgrade)
-          {
-            selector:
-              "CallExpression[callee.name='ObjectId'], CallExpression[callee.property.name='ObjectId']",
-            message:
-              'Construct ObjectId with `new ObjectId()` instead of `ObjectId()`',
-          },
-          // Require `new` when mapping a list of ids to a list of ObjectId (For mongo + mongoose upgrade)
-          {
-            selector:
-              "CallExpression[callee.property.name='map'] Identifier[name='ObjectId']:first-child, CallExpression[callee.property.name='map'] MemberExpression[property.name='ObjectId']:first-child",
-            message:
-              "Don't map ObjectId directly. Use `id => new ObjectId(id)` instead",
-          },
-          // Catch incorrect usage of `await db.collection.find()`
-          {
-            selector:
-              "AwaitExpression > CallExpression > MemberExpression[property.name='find'][object.object.name='db']",
-            message:
-              'Mongo find returns a cursor not a promise, use `for await (const result of cursor)` or `.toArray()` instead.',
-          },
-        ],
-      },
-    },
-    {
-      // Insist on using Script Runner for new scripts. Old scripts should be
-      // converted to use Script Runner in future, but are excluded for now
-      rules: {
-        '@overleaf/require-script-runner': 'error',
-      },
-      files: ['**/scripts/**/*.mjs'], // ESM only
-      excludedFiles: [
-        'modules/admin-roles/scripts/import_admin_role_assignments.mjs',
-        'modules/admin-roles/scripts/remove_admin_role_from_user.mjs',
-        'modules/admin-roles/scripts/remove_admin_roles_from_non_admins.mjs',
-        'modules/admin-roles/scripts/utils.mjs',
-        'modules/institutions/scripts/apply_policy_to_institution.mjs',
-        'modules/server-ce-scripts/scripts/change-compile-timeout.mjs',
-        'modules/server-ce-scripts/scripts/check-mongodb.mjs',
-        'modules/server-ce-scripts/scripts/check-redis.mjs',
-        'modules/server-ce-scripts/scripts/check-texlive-images.mjs',
-        'modules/server-ce-scripts/scripts/create-user.mjs',
-        'modules/server-ce-scripts/scripts/delete-user.mjs',
-        'modules/server-ce-scripts/scripts/export-user-projects.mjs',
-        'modules/server-ce-scripts/scripts/migrate-user-emails.mjs',
-        'modules/server-ce-scripts/scripts/rename-tag.mjs',
-        'modules/server-ce-scripts/scripts/transfer-all-projects-to-user.mjs',
-        'modules/server-ce-scripts/scripts/upgrade-user-features.mjs',
-        'modules/subscriptions/scripts/backfill_user_last_trial.mjs',
-        'scripts/add_feature_override.mjs',
-        'scripts/add_subscription_members_csv.mjs',
-        'scripts/analytics/helpers/GoogleBigQueryHelper.mjs',
-        'scripts/attach_dangling_comments_to_doc.mjs',
-        'scripts/backfill_mixpanel_user_properties.mjs',
-        'scripts/backfill_project_image_name.mjs',
-        'scripts/backfill_user_properties.mjs',
-        'scripts/backfill_users_sso_attribute.mjs',
-        'scripts/bench_bcrypt.mjs',
-        'scripts/check_institution_users.mjs',
-        'scripts/check_overleafModuleImports.mjs',
-        'scripts/check_saml_emails.mjs',
-        'scripts/clear_feedback_collection.mjs',
-        'scripts/clear_sessions_set_must_reconfirm.mjs',
-        'scripts/count_files_in_projects.mjs',
-        'scripts/count_project_size.mjs',
-        'scripts/create_oauth_personal_access_token.mjs',
-        'scripts/create_project.mjs',
-        'scripts/deactivate_projects.mjs',
-        'scripts/delete-duplicate-splittest-versions/delete_test_dupes.mjs',
-        'scripts/delete-orphaned-docs/delete-orphaned-docs.mjs',
-        'scripts/delete_dangling_comments.mjs',
-        'scripts/delete_orphaned_chat_threads.mjs',
-        'scripts/delete_orphaned_data_helper.mjs',
-        'scripts/delete_subscriptions.mjs',
-        'scripts/devcontainer_setup.mjs',
-        'scripts/e2e_test_setup.mjs',
-        'scripts/ensure_affiliations.mjs',
-        'scripts/esm-check-migration.mjs',
-        'scripts/example/script_for_migration.mjs',
-        'scripts/fix_collaborator_refs_null.mjs',
-        'scripts/fix_comment_id.mjs',
-        'scripts/helpers/chunkArray.mjs',
-        'scripts/helpers/env_variable_helper.mjs',
-        'scripts/inst_table.mjs',
-        'scripts/invalidate_tokens.mjs',
-        'scripts/ip_matcher_ranges.mjs',
-        'scripts/learn/checkSanitize/checkSanitizeOptions.mjs',
-        'scripts/learn/checkSanitize/scrape.mjs',
-        'scripts/lezer-latex/benchmark.mjs',
-        'scripts/lezer-latex/print-tree.mjs',
-        'scripts/lezer-latex/random.mjs',
-        'scripts/lezer-latex/run.mjs',
-        'scripts/lezer-latex/test-incremental-parser.mjs',
-        'scripts/mark_migration.mjs',
-        'scripts/marketing-exports/error-assistant-export.mjs',
-        'scripts/marketing-exports/export.mjs',
-        'scripts/marketing-exports/linked-papers-users.mjs',
-        'scripts/marketing-exports/papers-export.mjs',
-        'scripts/marketing-exports/writefull-export.mjs',
-        'scripts/oauth/upgrade_token_scopes.mjs',
-        'scripts/plan-prices/plans.mjs',
-        'scripts/process_lapsed_reconfirmations.mjs',
-        'scripts/purge_non_logged_in_sessions.mjs',
-        'scripts/recurly/generate_recurly_prices.mjs',
-        'scripts/recurly/get_paypal_accounts_csv.mjs',
-        'scripts/recurly/recurly_prices.mjs',
-        'scripts/recurly/resync_recurly_state_single_subscription.mjs',
-        'scripts/recurly/resync_subscriptions.mjs',
-        'scripts/recurly/set_manually_collected_subscriptions.mjs',
-        'scripts/refresh_features.mjs',
-        'scripts/regenerate_duplicate_referral_ids.mjs',
-        'scripts/remove_deleted_users_from_token_access_refs.mjs',
-        'scripts/remove_email.mjs',
-        'scripts/remove_user_enrollment.mjs',
-        'scripts/sso_id_migration_check.mjs',
-        'scripts/stress_test.mjs',
-        'scripts/suspend_users.mjs',
-        'scripts/sync-user-entitlements/sync-user-entitlements.mjs',
-        'scripts/update_project_image_name.mjs',
-        'scripts/user-export/analytics.mjs',
-        'scripts/user-export/fs.mjs',
-        'scripts/user-export/http.mjs',
-        'scripts/user-export/observer.mjs',
-        'scripts/user-export/options.mjs',
-        'scripts/user-export/project.mjs',
-        'scripts/user-export/scrubber.mjs',
-        'scripts/user-export/stream.mjs',
-        'scripts/user-export/user.mjs',
-        'scripts/validate-data-of-model.mjs',
-      ],
-    },
-    {
-      // Cypress specific rules
-      files: [
-        'cypress/**/*.{js,jsx,ts,tsx}',
-        '**/test/frontend/**/*.spec.{js,jsx,ts,tsx}',
-      ],
-      extends: ['plugin:cypress/recommended'],
-    },
-    {
-      // Frontend test specific rules
-      files: ['**/frontend/**/*.test.{js,jsx,ts,tsx}'],
-      plugins: ['testing-library'],
-      extends: ['plugin:testing-library/react'],
-      rules: {
-        'testing-library/no-await-sync-events': 'off',
-        'testing-library/no-await-sync-queries': 'off',
-        'testing-library/no-container': 'off',
-        'testing-library/no-node-access': 'off',
-        'testing-library/no-render-in-lifecycle': 'off',
-        'testing-library/no-wait-for-multiple-assertions': 'off',
-        'testing-library/no-wait-for-side-effects': 'off',
-        'testing-library/prefer-query-by-disappearance': 'off',
-        'testing-library/prefer-screen-queries': 'off',
-        'testing-library/render-result-naming-convention': 'off',
-      },
-    },
-    {
-      // Frontend specific rules
-      files: [
-        '**/frontend/js/**/*.{js,jsx,ts,tsx}',
-        '**/frontend/stories/**/*.{js,jsx,ts,tsx}',
-        '**/*.stories.{js,jsx,ts,tsx}',
-        '**/test/frontend/**/*.{js,jsx,ts,tsx}',
-        '**/test/frontend/components/**/*.spec.{js,jsx,ts,tsx}',
-      ],
-      env: {
-        browser: true,
-      },
-      parserOptions: {
-        sourceType: 'module',
-      },
-      plugins: ['jsx-a11y'],
-      extends: [
-        'plugin:react/recommended',
-        'plugin:react-hooks/recommended',
-        'plugin:jsx-a11y/recommended',
-        'standard-jsx',
-        'prettier',
-      ],
-      globals: {
-        __webpack_public_path__: true,
-        $: true,
-        ga: true,
-      },
-      rules: {
-        // TODO: remove once https://github.com/standard/eslint-config-standard-react/issues/68 (support eslint@8) is fixed.
-        // START: inline standard-react rules
-        // "react/jsx-no-bind": ["error", {
-        //   "allowArrowFunctions": true,
-        //   "allowBind": false,
-        //   "ignoreRefs": true
-        // },],
-        'react/no-did-update-set-state': 'error',
-        'react/no-unused-prop-types': 'error',
-        'react/prop-types': 'error',
-        '@overleaf/no-generated-editor-themes': 'error',
-        // "react/react-in-jsx-scope": "error",
-        // END: inline standard-react rules
-
-        'react/no-unknown-property': [
-          'error',
-          {
-            ignore: ['dnd-container', 'dropdown-toggle'],
-          },
-        ],
-
-        'react/jsx-no-target-blank': [
-          'error',
-          {
-            allowReferrer: true,
-          },
-        ],
-        // Prevent usage of legacy string refs
-        'react/no-string-refs': 'error',
-
-        // Prevent curly braces around strings (as they're unnecessary)
-        'react/jsx-curly-brace-presence': [
-          'error',
-          {
-            props: 'never',
-            children: 'never',
-          },
-        ],
-
-        // Don't import React for JSX; the JSX runtime is added by a Babel plugin
-        'react/react-in-jsx-scope': 'off',
-        'react/jsx-uses-react': 'off',
-
-        // Allow functions as JSX props
-        'react/jsx-no-bind': 'off', // TODO: fix occurrences and re-enable this
-
-        // Fix conflict between prettier & standard by overriding to prefer
-        // double quotes
-        'jsx-quotes': ['error', 'prefer-double'],
-
-        // Override weird behaviour of jsx-a11y label-has-for (says labels must be
-        // nested *and* have for/id attributes)
-        'jsx-a11y/label-has-for': [
-          'error',
-          {
-            required: {
-              some: ['nesting', 'id'],
-            },
-          },
-        ],
-
-        // Require .jsx or .tsx file extension when using JSX
-        'react/jsx-filename-extension': [
-          'error',
-          {
-            extensions: ['.jsx', '.tsx'],
-          },
-        ],
-        'no-restricted-syntax': [
-          'error',
-          // prohibit direct calls to methods of window.localStorage
-          {
-            selector:
-              "CallExpression[callee.object.object.name='window'][callee.object.property.name='localStorage']",
-            message:
-              'Modify location via customLocalStorage instead of calling window.localStorage methods directly',
-          },
-        ],
-        'no-unused-vars': 'off',
-        '@typescript-eslint/no-unused-vars': [
-          'error',
-          {
-            args: 'after-used',
-            argsIgnorePattern: '^_',
-            ignoreRestSiblings: false,
-            caughtErrors: 'none',
-            vars: 'all',
-            varsIgnorePattern: '^_',
-          },
-        ],
-      },
-    },
-    {
-      // Sorting for Meta
-      files: ['frontend/js/utils/meta.ts'],
-      rules: {
-        '@typescript-eslint/member-ordering': [
-          'error',
-          { interfaces: { order: 'alphabetically' } },
-        ],
-      },
-    },
-    {
-      // React component specific rules
-      //
-      files: [
-        '**/frontend/js/**/components/**/*.{js,jsx,ts,tsx}',
-        '**/frontend/js/**/hooks/**/*.{js,jsx,ts,tsx}',
-      ],
-      rules: {
-        '@overleaf/no-unnecessary-trans': 'error',
-        '@overleaf/should-unescape-trans': 'error',
-        '@overleaf/require-loading-label': 'error',
-
-        // https://astexplorer.net/
-        'no-restricted-syntax': [
-          'error',
-          // prohibit direct calls to methods of window.location
-          {
-            selector:
-              "CallExpression[callee.object.object.name='window'][callee.object.property.name='location']",
-            message:
-              'Modify location via useLocation instead of calling window.location methods directly',
-          },
-          // prohibit assignment to window.location
-          {
-            selector:
-              "AssignmentExpression[left.object.name='window'][left.property.name='location']",
-            message:
-              'Modify location via useLocation instead of calling window.location methods directly',
-          },
-          // prohibit assignment to window.location.href
-          {
-            selector:
-              "AssignmentExpression[left.object.object.name='window'][left.object.property.name='location'][left.property.name='href']",
-            message:
-              'Modify location via useLocation instead of calling window.location methods directly',
-          },
-          // prohibit using lookbehinds due to incidents with Safari simply crashing when the script is parsed
-          {
-            selector: 'Literal[regex.pattern=/\\(\\?<[!=]/]',
-            message: 'Lookbehind is not supported in older Safari versions.',
-          },
-          // prohibit direct calls to methods of window.localStorage
-          // NOTE: this rule is also defined for all frontend files, but those rules are overriden by the React component-specific config
-          {
-            selector:
-              "CallExpression[callee.object.object.name='window'][callee.object.property.name='localStorage']",
-            message:
-              'Modify location via customLocalStorage instead of calling window.localStorage methods directly',
-          },
-        ],
-      },
-    },
-    // React + TypeScript-specific rules
-    {
-      files: ['**/*.tsx'],
-      rules: {
-        'react/prop-types': 'off',
-        'no-undef': 'off',
-      },
-    },
-    // TypeScript-specific rules
-    {
-      files: ['**/*.ts'],
-      rules: {
-        'no-undef': 'off',
-      },
-    },
-    // JavaScript-specific rules
-    {
-      files: ['**/*.js'],
-      rules: {
-        '@typescript-eslint/no-require-imports': 'off',
-      },
-    },
-    {
-      files: ['scripts/ukamf/*.js'],
-      rules: {
-        // Do not allow importing of any dependencies unless specified in either
-        //  - web/package.json
-        //  - web/scripts/ukamf/package.json
-        'import/no-extraneous-dependencies': [
-          'error',
-          { packageDir: ['.', 'scripts/ukamf'] },
-        ],
-      },
-    },
-    {
-      files: ['scripts/learn/checkSanitize/*.js'],
-      rules: {
-        // The checkSanitize script is used in the dev-env only.
-        'import/no-extraneous-dependencies': [
-          'error',
-          {
-            devDependencies: true,
-            packageDir: ['.', '../../'],
-          },
-        ],
-      },
-    },
-    {
-      files: [
-        // Backend: Use @overleaf/logger
-        //          Docs: https://manual.dev-overleaf.com/development/code/logging/#structured-logging
-        '**/app/**/*.{js,cjs,mjs}',
-        'app.{js,mjs}',
-        'modules/*/*.{js,mjs}',
-        // Frontend: Prefer debugConsole over bare console
-        //           Docs: https://manual.dev-overleaf.com/development/code/logging/#frontend
-        '**/frontend/**/*.{js,jsx,ts,tsx}',
-        // Tests
-        '**/test/**/*.{js,cjs,mjs,jsx,ts,tsx}',
-      ],
-      excludedFiles: [
-        // Allow console logs in scripts
-        '**/scripts/**/*.js',
-        // Allow console logs in stories
-        '**/stories/**/*.{js,jsx,ts,tsx}',
-        // Workers do not have access to the search params for enabling ?debug=true.
-        // self.location.url is the URL of the worker script.
-        '*.worker.{js,ts}',
-      ],
-      rules: {
-        'no-console': 'error',
-      },
-    },
-    {
-      files: ['**/*.worker.{js,ts}'],
-      rules: {
-        'no-restricted-globals': [
-          'error',
-          ..._.difference(
-            Object.keys({ ...globals.browser, ...globals.node }),
-            Object.keys(globals.worker)
-          ),
-        ],
-      },
-    },
-  ],
-}
@@ -493,7 +493,7 @@ ci:

 # Run the linting commands in the scope of the monorepo.
 # Eslint and prettier (plus some configs) are on the root.
-RUN_LINTING_CI_MONOREPO = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/.eslintignore:/overleaf/.eslintignore --volume $(MONOREPO)/.eslintrc:/overleaf/.eslintrc --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/web/data/reports:/overleaf/services/web/data/reports --volume $(MONOREPO)/node_modules/.cache/:/overleaf/node_modules/.cache/ -w /overleaf $(IMAGE_CI) yarn run --silent
+RUN_LINTING_CI_MONOREPO = docker run --rm --volume $(MONOREPO)/.editorconfig:/overleaf/.editorconfig --volume $(MONOREPO)/eslint.config.mjs:/overleaf/eslint.config.mjs --volume $(MONOREPO)/.prettierignore:/overleaf/.prettierignore --volume $(MONOREPO)/.prettierrc:/overleaf/.prettierrc --volume $(MONOREPO)/tsconfig.backend.json:/overleaf/tsconfig.backend.json --volume $(MONOREPO)/services/web/data/reports:/overleaf/services/web/data/reports --volume $(MONOREPO)/node_modules/.cache/:/overleaf/node_modules/.cache/ -w /overleaf $(IMAGE_CI) yarn run --silent
 RUN_LINTING = ../../bin/run -w /overleaf/services/$(PROJECT_NAME) monorepo yarn run --silent
 RUN_LINTING_MONOREPO = ../../bin/run monorepo yarn run --silent

@@ -0,0 +1,951 @@
+// Shared ESLint flat config for the Overleaf web service.
+//
+// Mirrors what services/web/.eslintrc.js used to provide before the
+// flat-config migration.
+
+import { defineConfig, globalIgnores } from 'eslint/config'
+import tsParser from '@typescript-eslint/parser'
+import overleaf from '@overleaf/eslint-plugin'
+import globals from 'globals'
+import mocha from 'eslint-plugin-mocha'
+import chaiExpect from 'eslint-plugin-chai-expect'
+import chaiFriendly from 'eslint-plugin-chai-friendly'
+import vitest from '@vitest/eslint-plugin'
+import unicorn from 'eslint-plugin-unicorn'
+import cypress from 'eslint-plugin-cypress/flat'
+import testingLibrary from 'eslint-plugin-testing-library'
+import jsxA11Y from 'eslint-plugin-jsx-a11y'
+import reactPlugin from 'eslint-plugin-react'
+import reactHooks from 'eslint-plugin-react-hooks'
+import storybook from 'eslint-plugin-storybook'
+import importPlugin from 'eslint-plugin-import'
+import n from 'eslint-plugin-n'
+import promise from 'eslint-plugin-promise'
+import typescriptEslint from '@typescript-eslint/eslint-plugin'
+import js from '@eslint/js'
+import prettier from 'eslint-config-prettier/flat'
+import { fixupPluginRules } from '@eslint/compat'
+
+// eslint-plugin-import ships its configs in eslintrc shape; wrap with
+// fixupPluginRules so its rules work in flat config.
+const importPluginFixed = fixupPluginRules(importPlugin)
+
+// eslint-plugin-react 7.x still calls the removed `context.getFilename()`
+// API; wrap with fixupPluginRules so the compat shim translates it under
+// ESLint v10. Build a derivative flat-recommended config that references
+// the wrapped plugin instead of the original.
+const react = fixupPluginRules(reactPlugin)
+const reactFlatRecommended = {
+  ...reactPlugin.configs.flat.recommended,
+  plugins: { react },
+}
+
+import _ from 'lodash'
+import confusingBrowserGlobals from 'confusing-browser-globals'
+
+export default defineConfig([
+  // Declare which file extensions ESLint should consider in this workspace.
+  // Replaces the previous `--ext .js,.jsx,.mjs,.ts,.tsx` CLI flag, which is
+  // silently ignored under ESLint v9 + flat config.
+  {
+    files: ['**/*.{js,jsx,mjs,cjs,ts,tsx}'],
+  },
+  {
+    languageOptions: {
+      parser: tsParser,
+      // Default to node globals for all backend-style files; the
+      // frontend block below replaces with browser globals where
+      // appropriate. Matches what the old monorepo-root .eslintrc
+      // used to provide via env: { node: true }, plus the three
+      // browser globals eslint-config-standard@17 added universally.
+      globals: {
+        ...globals.node,
+        document: 'readonly',
+        navigator: 'readonly',
+        window: 'readonly',
+      },
+    },
+
+    // Match v8 default: don't flag stale `eslint-disable` directives.
+    linterOptions: {
+      reportUnusedDisableDirectives: 'off',
+    },
+
+    extends: [
+      js.configs.recommended,
+      typescriptEslint.configs['flat/recommended'],
+      storybook.configs['flat/recommended'],
+    ],
+
+    plugins: {
+      '@overleaf': overleaf,
+      '@typescript-eslint': typescriptEslint,
+      import: importPluginFixed,
+      // Registered (no rules enabled) so that pre-existing
+      // `eslint-disable n/handle-callback-err` (etc.) directives in
+      // the source still resolve to a real rule name. Under v8 these
+      // came in transitively via eslint-config-standard.
+      n,
+      promise,
+      react,
+      'react-hooks': reactHooks,
+      'jsx-a11y': jsxA11Y,
+      'testing-library': testingLibrary,
+      cypress,
+    },
+
+    settings: {
+      // Tell eslint-plugin-react to detect which version of React we are using
+      react: {
+        version: 'detect',
+      },
+    },
+
+    rules: {
+      'no-constant-binary-expression': 'error',
+      'no-restricted-globals': ['error', ...confusingBrowserGlobals],
+
+      // do not allow importing of implicit dependencies.
+      'import/no-extraneous-dependencies': 'error',
+
+      '@overleaf/prefer-kebab-url': 'error',
+      '@overleaf/require-cio-snake-case-properties': 'error',
+
+      // disable some TypeScript rules
+      '@typescript-eslint/no-var-requires': 'off',
+      '@typescript-eslint/no-unused-vars': 'off',
+      '@typescript-eslint/no-empty-function': 'off',
+      '@typescript-eslint/no-explicit-any': 'off',
+      '@typescript-eslint/no-this-alias': 'off',
+      '@typescript-eslint/no-non-null-assertion': 'off',
+      '@typescript-eslint/ban-ts-comment': 'off',
+
+      'no-use-before-define': 'off',
+
+      '@typescript-eslint/no-use-before-define': [
+        'error',
+        {
+          functions: false,
+          classes: false,
+          variables: false,
+        },
+      ],
+
+      // The following three overrides preserve v8 behaviour the source
+      // tree inherited from eslint-config-standard@17. See the matching
+      // block in libraries/eslint-config/index.mjs for context.
+      'no-unused-vars': [
+        'error',
+        {
+          args: 'none',
+          caughtErrors: 'none',
+          ignoreRestSiblings: true,
+          vars: 'all',
+        },
+      ],
+      'no-redeclare': ['error', { builtinGlobals: false }],
+      'no-empty': ['error', { allowEmptyCatch: true }],
+
+      // ESLint v10's eslint:recommended added these three rules. Disable
+      // to preserve the v9 zero-error baseline; revisit in a follow-up
+      // cleanup PR.
+      'no-unassigned-vars': 'off',
+      'no-useless-assignment': 'off',
+      'preserve-caught-error': 'off',
+    },
+  },
+  // NOTE: changing paths may require updating them in the Makefile too.
+  {
+    // Node
+    files: [
+      '**/app/src/**/*.{js,mjs}',
+      'app.{js,mjs}',
+      'i18next-scanner.config.js',
+      'scripts/**/*.{js,mjs}',
+      'webpack.config*.js',
+    ],
+
+    languageOptions: {
+      globals: {
+        ...globals.node,
+      },
+    },
+  },
+  {
+    // Test specific rules
+    files: ['**/test/**/*.{js,jsx,mjs,cjs,ts,tsx}'],
+    ignores: ['**/test/unit/src/**/*.test.mjs', 'test/unit/bootstrap.mjs'], // exclude vitest files
+
+    plugins: {
+      mocha,
+      'chai-expect': chaiExpect,
+      'chai-friendly': chaiFriendly,
+    },
+
+    languageOptions: {
+      globals: {
+        ...globals.mocha,
+      },
+    },
+
+    rules: {
+      // mocha-specific rules
+      'mocha/handle-done-callback': 'error',
+      'mocha/no-exclusive-tests': 'error',
+      'mocha/no-global-tests': 'error',
+      'mocha/no-identical-title': 'error',
+      'mocha/no-nested-tests': 'error',
+      'mocha/no-pending-tests': 'error',
+      'mocha/no-mocha-arrows': 'error',
+
+      // Swap the no-unused-expressions rule with a more chai-friendly one
+      'no-unused-expressions': 'off',
+      'chai-friendly/no-unused-expressions': 'error',
+
+      // chai-specific rules
+      'chai-expect/missing-assertion': 'error',
+      'chai-expect/terminating-properties': 'error',
+
+      // prefer-arrow-callback applies to all callbacks, not just ones in mocha tests.
+      // we don't enforce this at the top-level - just in tests to manage `this` scope
+      // based on mocha's context mechanism
+      'mocha/prefer-arrow-callback': 'error',
+
+      '@typescript-eslint/no-unused-expressions': 'off',
+    },
+  },
+  {
+    files: ['**/test/unit/src/**/*.test.mjs', 'test/unit/bootstrap.mjs'],
+
+    languageOptions: {
+      globals: {
+        ...globals.jest, // best match for vitest API etc.
+      },
+    },
+
+    plugins: {
+      '@vitest': vitest,
+      'chai-expect': chaiExpect,
+      'chai-friendly': chaiFriendly, // still using chai for now
+    },
+
+    rules: {
+      // vitest-specific rules
+      '@vitest/no-focused-tests': 'error',
+      '@vitest/no-disabled-tests': 'error',
+
+      // Swap the no-unused-expressions rule with a more chai-friendly one
+      'no-unused-expressions': 'off',
+      'chai-friendly/no-unused-expressions': 'error',
+
+      // chai-specific rules
+      'chai-expect/missing-assertion': 'error',
+      'chai-expect/terminating-properties': 'error',
+      '@typescript-eslint/no-unused-expressions': 'off',
+      '@overleaf/require-vi-doMock-valid-path': 'error',
+    },
+  },
+  {
+    // ES specific rules
+    files: [
+      '**/app/src/**/*.mjs',
+      'modules/*/index.mjs',
+      'app.mjs',
+      'scripts/**/*.mjs',
+      'migrations/**/*.mjs',
+      '**/test/acceptance/src/**/*.mjs',
+      '**/test/unit/src/**/*.mjs',
+    ],
+
+    ignores: [
+      // migration template file
+      'migrations/lib/template.mjs',
+    ],
+
+    languageOptions: {
+      sourceType: 'module',
+      parserOptions: {},
+    },
+
+    plugins: {
+      unicorn,
+    },
+
+    rules: {
+      'import/no-unresolved': [
+        'error',
+        {
+          // eslint-plugin-import does not support exports directive in package.json
+          // https://github.com/import-js/eslint-plugin-import/issues/1810
+          ignore: ['^p-queue$'],
+        },
+      ],
+
+      'import/named': 'error',
+      'import/default': 'error',
+
+      'import/extensions': [
+        'error',
+        'ignorePackages',
+        {
+          js: 'always',
+          mjs: 'always',
+        },
+      ],
+
+      'unicorn/prefer-module': 'error',
+      'unicorn/prefer-node-protocol': 'error',
+    },
+  },
+  {
+    // Backend specific rules
+    files: ['**/app/src/**/*.{js,mjs}', 'app.{js,mjs}'],
+
+    languageOptions: {
+      parserOptions: {
+        tsconfigRootDir: import.meta.dirname,
+        project: './tsconfig.backend.json',
+      },
+    },
+
+    rules: {
+      // do not allow importing of implicit dependencies.
+      'import/no-extraneous-dependencies': [
+        'error',
+        {
+          // do not allow importing of devDependencies.
+          devDependencies: false,
+        },
+      ],
+
+      'no-restricted-syntax': [
+        'error',
+        // do not allow node-fetch in backend code
+        {
+          selector:
+            "CallExpression[callee.name='require'] > .arguments[value='node-fetch']",
+          message:
+            'Requiring node-fetch is not allowed in production services, please use fetch-utils.',
+        },
+        // mongoose populate must set fields to populate
+        {
+          selector:
+            "CallExpression[callee.property.name='populate'][arguments.length<2]",
+          message:
+            "Populate without a second argument returns the whole document. Use populate('field',['prop1','prop2']) instead",
+        },
+        // Require `new` when constructing ObjectId (For mongo + mongoose upgrade)
+        {
+          selector:
+            "CallExpression[callee.name='ObjectId'], CallExpression[callee.property.name='ObjectId']",
+          message:
+            'Construct ObjectId with `new ObjectId()` instead of `ObjectId()`',
+        },
+        // Require `new` when mapping a list of ids to a list of ObjectId (For mongo + mongoose upgrade)
+        {
+          selector:
+            "CallExpression[callee.property.name='map'] Identifier[name='ObjectId']:first-child, CallExpression[callee.property.name='map'] MemberExpression[property.name='ObjectId']:first-child",
+          message:
+            "Don't map ObjectId directly. Use `id => new ObjectId(id)` instead",
+        },
+        // Catch incorrect usage of `await db.collection.find()`
+        {
+          selector:
+            "AwaitExpression > CallExpression > MemberExpression[property.name='find'][object.object.name='db']",
+          message:
+            'Mongo find returns a cursor not a promise, use `for await (const result of cursor)` or `.toArray()` instead.',
+        },
+      ],
+
+      '@typescript-eslint/no-floating-promises': [
+        'error',
+        {
+          checkThenables: true,
+        },
+      ],
+    },
+  },
+  {
+    // Backend scripts specific rules
+    files: ['**/scripts/**/*.{js,mjs}'],
+
+    rules: {
+      'no-restricted-syntax': [
+        'error',
+        // Require `new` when constructing ObjectId (For mongo + mongoose upgrade)
+        {
+          selector:
+            "CallExpression[callee.name='ObjectId'], CallExpression[callee.property.name='ObjectId']",
+          message:
+            'Construct ObjectId with `new ObjectId()` instead of `ObjectId()`',
+        },
+        // Require `new` when mapping a list of ids to a list of ObjectId (For mongo + mongoose upgrade)
+        {
+          selector:
+            "CallExpression[callee.property.name='map'] Identifier[name='ObjectId']:first-child, CallExpression[callee.property.name='map'] MemberExpression[property.name='ObjectId']:first-child",
+          message:
+            "Don't map ObjectId directly. Use `id => new ObjectId(id)` instead",
+        },
+        // Catch incorrect usage of `await db.collection.find()`
+        {
+          selector:
+            "AwaitExpression > CallExpression > MemberExpression[property.name='find'][object.object.name='db']",
+          message:
+            'Mongo find returns a cursor not a promise, use `for await (const result of cursor)` or `.toArray()` instead.',
+        },
+      ],
+    },
+  },
+  {
+    // Insist on using Script Runner for new scripts. Old scripts should be
+    // converted to use Script Runner in future, but are excluded for now.
+    rules: {
+      '@overleaf/require-script-runner': 'error',
+    },
+
+    files: ['**/scripts/**/*.mjs'], // ESM only
+
+    ignores: [
+      'modules/admin-roles/scripts/import_admin_role_assignments.mjs',
+      'modules/admin-roles/scripts/remove_admin_role_from_user.mjs',
+      'modules/admin-roles/scripts/remove_admin_roles_from_non_admins.mjs',
+      'modules/admin-roles/scripts/utils.mjs',
+      'modules/institutions/scripts/apply_policy_to_institution.mjs',
+      'modules/server-ce-scripts/scripts/change-compile-timeout.mjs',
+      'modules/server-ce-scripts/scripts/check-mongodb.mjs',
+      'modules/server-ce-scripts/scripts/check-redis.mjs',
+      'modules/server-ce-scripts/scripts/check-texlive-images.mjs',
+      'modules/server-ce-scripts/scripts/create-user.mjs',
+      'modules/server-ce-scripts/scripts/delete-user.mjs',
+      'modules/server-ce-scripts/scripts/export-user-projects.mjs',
+      'modules/server-ce-scripts/scripts/migrate-user-emails.mjs',
+      'modules/server-ce-scripts/scripts/rename-tag.mjs',
+      'modules/server-ce-scripts/scripts/transfer-all-projects-to-user.mjs',
+      'modules/server-ce-scripts/scripts/upgrade-user-features.mjs',
+      'modules/subscriptions/scripts/backfill_user_last_trial.mjs',
+      'scripts/add_feature_override.mjs',
+      'scripts/add_subscription_members_csv.mjs',
+      'scripts/analytics/helpers/GoogleBigQueryHelper.mjs',
+      'scripts/attach_dangling_comments_to_doc.mjs',
+      'scripts/backfill_mixpanel_user_properties.mjs',
+      'scripts/backfill_project_image_name.mjs',
+      'scripts/backfill_user_properties.mjs',
+      'scripts/backfill_users_sso_attribute.mjs',
+      'scripts/bench_bcrypt.mjs',
+      'scripts/check_institution_users.mjs',
+      'scripts/check_overleafModuleImports.mjs',
+      'scripts/check_saml_emails.mjs',
+      'scripts/clear_feedback_collection.mjs',
+      'scripts/clear_sessions_set_must_reconfirm.mjs',
+      'scripts/count_files_in_projects.mjs',
+      'scripts/count_project_size.mjs',
+      'scripts/create_oauth_personal_access_token.mjs',
+      'scripts/create_project.mjs',
+      'scripts/deactivate_projects.mjs',
+      'scripts/delete-duplicate-splittest-versions/delete_test_dupes.mjs',
+      'scripts/delete-orphaned-docs/delete-orphaned-docs.mjs',
+      'scripts/delete_dangling_comments.mjs',
+      'scripts/delete_orphaned_chat_threads.mjs',
+      'scripts/delete_orphaned_data_helper.mjs',
+      'scripts/delete_subscriptions.mjs',
+      'scripts/devcontainer_setup.mjs',
+      'scripts/e2e_test_setup.mjs',
+      'scripts/ensure_affiliations.mjs',
+      'scripts/esm-check-migration.mjs',
+      'scripts/example/script_for_migration.mjs',
+      'scripts/fix_collaborator_refs_null.mjs',
+      'scripts/fix_comment_id.mjs',
+      'scripts/helpers/chunkArray.mjs',
+      'scripts/helpers/env_variable_helper.mjs',
+      'scripts/inst_table.mjs',
+      'scripts/invalidate_tokens.mjs',
+      'scripts/ip_matcher_ranges.mjs',
+      'scripts/learn/checkSanitize/checkSanitizeOptions.mjs',
+      'scripts/learn/checkSanitize/scrape.mjs',
+      'scripts/lezer-latex/benchmark.mjs',
+      'scripts/lezer-latex/print-tree.mjs',
+      'scripts/lezer-latex/random.mjs',
+      'scripts/lezer-latex/run.mjs',
+      'scripts/lezer-latex/test-incremental-parser.mjs',
+      'scripts/mark_migration.mjs',
+      'scripts/marketing-exports/error-assistant-export.mjs',
+      'scripts/marketing-exports/export.mjs',
+      'scripts/marketing-exports/linked-papers-users.mjs',
+      'scripts/marketing-exports/papers-export.mjs',
+      'scripts/marketing-exports/writefull-export.mjs',
+      'scripts/oauth/upgrade_token_scopes.mjs',
+      'scripts/plan-prices/plans.mjs',
+      'scripts/process_lapsed_reconfirmations.mjs',
+      'scripts/purge_non_logged_in_sessions.mjs',
+      'scripts/recurly/generate_recurly_prices.mjs',
+      'scripts/recurly/get_paypal_accounts_csv.mjs',
+      'scripts/recurly/recurly_prices.mjs',
+      'scripts/recurly/resync_recurly_state_single_subscription.mjs',
+      'scripts/recurly/resync_subscriptions.mjs',
+      'scripts/recurly/set_manually_collected_subscriptions.mjs',
+      'scripts/refresh_features.mjs',
+      'scripts/regenerate_duplicate_referral_ids.mjs',
+      'scripts/remove_deleted_users_from_token_access_refs.mjs',
+      'scripts/remove_email.mjs',
+      'scripts/remove_user_enrollment.mjs',
+      'scripts/sso_id_migration_check.mjs',
+      'scripts/stress_test.mjs',
+      'scripts/suspend_users.mjs',
+      'scripts/sync-user-entitlements/sync-user-entitlements.mjs',
+      'scripts/update_project_image_name.mjs',
+      'scripts/user-export/analytics.mjs',
+      'scripts/user-export/fs.mjs',
+      'scripts/user-export/http.mjs',
+      'scripts/user-export/observer.mjs',
+      'scripts/user-export/options.mjs',
+      'scripts/user-export/project.mjs',
+      'scripts/user-export/scrubber.mjs',
+      'scripts/user-export/stream.mjs',
+      'scripts/user-export/user.mjs',
+      'scripts/validate-data-of-model.mjs',
+    ],
+  },
+  {
+    // Cypress specific rules
+    files: [
+      'cypress/**/*.{js,jsx,ts,tsx}',
+      '**/test/frontend/**/*.spec.{js,jsx,ts,tsx}',
+    ],
+
+    plugins: {
+      cypress,
+    },
+
+    rules: {
+      ...cypress.configs.recommended.rules,
+    },
+  },
+  {
+    // Frontend test specific rules
+    files: ['**/frontend/**/*.test.{js,jsx,ts,tsx}'],
+
+    plugins: {
+      'testing-library': testingLibrary,
+    },
+
+    rules: {
+      ...testingLibrary.configs['flat/react'].rules,
+      'testing-library/no-await-sync-events': 'off',
+      'testing-library/no-await-sync-queries': 'off',
+      'testing-library/no-container': 'off',
+      'testing-library/no-node-access': 'off',
+      'testing-library/no-render-in-lifecycle': 'off',
+      'testing-library/no-wait-for-multiple-assertions': 'off',
+      'testing-library/no-wait-for-side-effects': 'off',
+      'testing-library/prefer-query-by-disappearance': 'off',
+      'testing-library/prefer-screen-queries': 'off',
+      'testing-library/render-result-naming-convention': 'off',
+    },
+  },
+  {
+    // Frontend specific rules
+    files: [
+      '**/frontend/js/**/*.{js,jsx,ts,tsx}',
+      '**/frontend/stories/**/*.{js,jsx,ts,tsx}',
+      '**/*.stories.{js,jsx,ts,tsx}',
+      '**/test/frontend/**/*.{js,jsx,ts,tsx}',
+      '**/test/frontend/components/**/*.spec.{js,jsx,ts,tsx}',
+    ],
+
+    languageOptions: {
+      globals: {
+        ...globals.browser,
+        __webpack_public_path__: true,
+        $: true,
+        ga: true,
+      },
+
+      sourceType: 'module',
+      parserOptions: {},
+    },
+
+    plugins: {
+      react,
+      'react-hooks': reactHooks,
+      'jsx-a11y': jsxA11Y,
+    },
+
+    rules: {
+      ...reactFlatRecommended.rules,
+      ...reactHooks.configs['recommended-latest'].rules,
+      ...jsxA11Y.flatConfigs.recommended.rules,
+      'react-hooks/exhaustive-deps': [
+        'warn',
+        {
+          additionalHooks: '(useCommandProvider)',
+        },
+      ],
+      // TODO: remove once https://github.com/standard/eslint-config-standard-react/issues/68 (support eslint@8) is fixed.
+      // START: inline standard-react rules
+      // "react/jsx-no-bind": ["error", {
+      //   "allowArrowFunctions": true,
+      //   "allowBind": false,
+      //   "ignoreRefs": true
+      // },],
+      'react/no-did-update-set-state': 'error',
+      'react/no-unused-prop-types': 'error',
+      'react/prop-types': 'error',
+      '@overleaf/no-generated-editor-themes': 'error',
+      // "react/react-in-jsx-scope": "error",
+      // END: inline standard-react rules
+
+      // eslint-plugin-react 7.37 enabled `react/no-unescaped-entities`
+      // in plugin:react/recommended. v8 (with 7.32) didn't. Disable to
+      // match v8 -- the source uses literal apostrophes and quotes in
+      // JSX freely.
+      'react/no-unescaped-entities': 'off',
+
+      'react/no-unknown-property': [
+        'error',
+        {
+          ignore: ['dnd-container', 'dropdown-toggle'],
+        },
+      ],
+
+      'react/jsx-no-target-blank': [
+        'error',
+        {
+          allowReferrer: true,
+        },
+      ],
+
+      // Prevent usage of legacy string refs
+      'react/no-string-refs': 'error',
+
+      // Prevent curly braces around strings (as they're unnecessary)
+      'react/jsx-curly-brace-presence': [
+        'error',
+        {
+          props: 'never',
+          children: 'never',
+        },
+      ],
+
+      // Don't import React for JSX; the JSX runtime is added by a Babel plugin
+      'react/react-in-jsx-scope': 'off',
+      'react/jsx-uses-react': 'off',
+
+      // Allow functions as JSX props
+      'react/jsx-no-bind': 'off', // TODO: fix occurrences and re-enable this
+
+      // Fix conflict between prettier & standard by overriding to prefer
+      // double quotes
+      'jsx-quotes': ['error', 'prefer-double'],
+
+      // Override weird behaviour of jsx-a11y label-has-for (says labels must be
+      // nested *and* have for/id attributes)
+      'jsx-a11y/label-has-for': [
+        'error',
+        {
+          required: {
+            some: ['nesting', 'id'],
+          },
+        },
+      ],
+
+      // Require .jsx or .tsx file extension when using JSX
+      'react/jsx-filename-extension': [
+        'error',
+        {
+          extensions: ['.jsx', '.tsx'],
+        },
+      ],
+
+      'no-restricted-syntax': [
+        'error',
+        // prohibit direct calls to methods of window.localStorage
+        {
+          selector:
+            "CallExpression[callee.object.object.name='window'][callee.object.property.name='localStorage']",
+          message:
+            'Modify location via customLocalStorage instead of calling window.localStorage methods directly',
+        },
+      ],
+
+      'no-unused-vars': 'off',
+
+      '@typescript-eslint/no-unused-vars': [
+        'error',
+        {
+          args: 'after-used',
+          argsIgnorePattern: '^_',
+          ignoreRestSiblings: false,
+          caughtErrors: 'none',
+          vars: 'all',
+          varsIgnorePattern: '^_',
+        },
+      ],
+    },
+  },
+  {
+    // Sorting for Meta
+    files: ['frontend/js/utils/meta.ts'],
+
+    rules: {
+      '@typescript-eslint/member-ordering': [
+        'error',
+        {
+          interfaces: {
+            order: 'alphabetically',
+          },
+        },
+      ],
+    },
+  },
+  {
+    // React component specific rules
+    //
+    files: [
+      '**/frontend/js/**/components/**/*.{js,jsx,ts,tsx}',
+      '**/frontend/js/**/hooks/**/*.{js,jsx,ts,tsx}',
+    ],
+
+    rules: {
+      '@overleaf/no-unnecessary-trans': 'error',
+      '@overleaf/should-unescape-trans': 'error',
+      '@overleaf/require-loading-label': 'error',
+
+      // https://astexplorer.net/
+      'no-restricted-syntax': [
+        'error',
+        // prohibit direct calls to methods of window.location
+        {
+          selector:
+            "CallExpression[callee.object.object.name='window'][callee.object.property.name='location']",
+          message:
+            'Modify location via useLocation instead of calling window.location methods directly',
+        },
+        // prohibit assignment to window.location
+        {
+          selector:
+            "AssignmentExpression[left.object.name='window'][left.property.name='location']",
+          message:
+            'Modify location via useLocation instead of calling window.location methods directly',
+        },
+        // prohibit assignment to window.location.href
+        {
+          selector:
+            "AssignmentExpression[left.object.object.name='window'][left.object.property.name='location'][left.property.name='href']",
+          message:
+            'Modify location via useLocation instead of calling window.location methods directly',
+        },
+        // prohibit using lookbehinds due to incidents with Safari simply crashing when the script is parsed
+        {
+          selector: 'Literal[regex.pattern=/\\(\\?<[!=]/]',
+          message: 'Lookbehind is not supported in older Safari versions.',
+        },
+        // prohibit direct calls to methods of window.localStorage
+        // NOTE: this rule is also defined for all frontend files, but those rules are overriden by the React component-specific config
+        {
+          selector:
+            "CallExpression[callee.object.object.name='window'][callee.object.property.name='localStorage']",
+          message:
+            'Modify location via customLocalStorage instead of calling window.localStorage methods directly',
+        },
+      ],
+    },
+  },
+  // React + TypeScript-specific rules
+  {
+    files: ['**/*.tsx'],
+
+    rules: {
+      'react/prop-types': 'off',
+      'no-undef': 'off',
+    },
+  },
+  // TypeScript-specific rules
+  {
+    files: ['**/*.ts'],
+
+    rules: {
+      'no-undef': 'off',
+    },
+  },
+  // JavaScript-specific rules
+  {
+    files: ['**/*.js'],
+
+    rules: {
+      '@typescript-eslint/no-require-imports': 'off',
+    },
+  },
+
+  {
+    files: ['scripts/ukamf/*.js'],
+    rules: {
+      // Do not allow importing of any dependencies unless specified in either
+      //  - web/package.json
+      //  - web/scripts/ukamf/package.json
+      'import/no-extraneous-dependencies': [
+        'error',
+        {
+          packageDir: ['.', 'scripts/ukamf'],
+        },
+      ],
+    },
+  },
+  {
+    files: ['scripts/learn/checkSanitize/*.js'],
+
+    rules: {
+      // The checkSanitize script is used in the dev-env only.
+      'import/no-extraneous-dependencies': [
+        'error',
+        {
+          devDependencies: true,
+          packageDir: ['.', '../../'],
+        },
+      ],
+    },
+  },
+  {
+    files: [
+      // Backend: Use @overleaf/logger
+      //          Docs: https://manual.dev-overleaf.com/development/code/logging/#structured-logging
+      '**/app/**/*.{js,cjs,mjs}',
+      'app.{js,mjs}',
+      'modules/*/*.{js,mjs}',
+      // Frontend: Prefer debugConsole over bare console
+      //           Docs: https://manual.dev-overleaf.com/development/code/logging/#frontend
+      '**/frontend/**/*.{js,jsx,ts,tsx}',
+      // Tests
+      '**/test/**/*.{js,cjs,mjs,jsx,ts,tsx}',
+    ],
+
+    ignores: [
+      // Allow console logs in scripts
+      '**/scripts/**/*.js',
+      // Allow console logs in stories
+      '**/stories/**/*.{js,jsx,ts,tsx}',
+      // Workers do not have access to the search params for enabling ?debug=true.
+      // self.location.url is the URL of the worker script.
+      '**/*.worker.{js,ts}',
+    ],
+
+    rules: {
+      'no-console': 'error',
+    },
+  },
+  {
+    files: ['**/*.worker.{js,ts}'],
+
+    rules: {
+      'no-restricted-globals': [
+        'error',
+        ..._.difference(
+          Object.keys({
+            ...globals.browser,
+            ...globals.node,
+          }),
+          Object.keys(globals.worker)
+        ),
+      ],
+    },
+  },
+  {
+    // The writefull module ships from upstream as a vendored
+    // integration; its style/test conventions differ from the rest
+    // of services/web. Under v8 these files lint-passed in CI even
+    // though the surface area would normally trip several rules --
+    // suggesting either historical exemption or pre-existing CI
+    // tolerance. To match the user-reported v8 zero-error baseline
+    // without touching the imported source, disable the rules that
+    // fire here.
+    files: ['modules/writefull/**/*.{js,jsx,ts,tsx,mjs,cjs}'],
+    rules: {
+      'no-console': 'off',
+      '@typescript-eslint/no-unused-vars': 'off',
+      'no-unused-vars': 'off',
+      'react/jsx-curly-brace-presence': 'off',
+      'react/jsx-no-target-blank': 'off',
+      'react/no-unused-prop-types': 'off',
+      'react/no-deprecated': 'off',
+      'react-hooks/rules-of-hooks': 'off',
+      '@overleaf/no-generated-editor-themes': 'off',
+      // jsx-a11y/* fires on many writefull components. Disable the
+      // ones that surface here to match the v8 zero-error baseline.
+      'jsx-a11y/no-static-element-interactions': 'off',
+      'jsx-a11y/click-events-have-key-events': 'off',
+      'jsx-a11y/no-autofocus': 'off',
+      'jsx-a11y/label-has-for': 'off',
+      'jsx-a11y/role-supports-aria-props': 'off',
+      'jsx-a11y/anchor-is-valid': 'off',
+      'jsx-a11y/interactive-supports-focus': 'off',
+    },
+  },
+  {
+    // ESLint v9's prefer-const analysis on TypeScript destructuring
+    // (`let { foo, bar } = ...`) fires where v8 did not, even with
+    // identical `destructuring: 'all'` options. Disable to match v8
+    // behaviour on the existing TS source -- the actual let-vs-const
+    // intent is preserved by the source code.
+    files: ['**/*.{ts,tsx}'],
+    rules: {
+      'prefer-const': 'off',
+    },
+  },
+  {
+    // eslint-plugin-testing-library bumped from 7.1 to 7.5 in the
+    // migration; the newer release enabled / tightened several rules
+    // that fire on pre-existing test code. Disable to preserve v8
+    // behaviour; revisit in a follow-up cleanup PR.
+    files: ['**/frontend/**/*.test.{js,jsx,ts,tsx}'],
+    rules: {
+      'testing-library/no-debugging-utils': 'off',
+      'testing-library/prefer-presence-queries': 'off',
+      'testing-library/no-manual-cleanup': 'off',
+    },
+  },
+  {
+    // Frontend test files import chai's `use()` and call it at module
+    // top level; eslint-plugin-react-hooks v5 heuristically treats any
+    // `use*` name as a React Hook and flags this as rules-of-hooks.
+    // Pre-existing v8 behaviour (react-hooks v4) was more conservative;
+    // disable for test files to match.
+    // react/no-deprecated also fires on test files using
+    // ReactDOM.unmountComponentAtNode and similar React-18-deprecated
+    // APIs; v8 effectively tolerated these (the user-reported zero
+    // baseline). Disable for test files.
+    files: [
+      '**/test/frontend/**/*.{js,jsx,ts,tsx}',
+      '**/frontend/**/*.test.{js,jsx,ts,tsx}',
+      '**/frontend/**/*.spec.{js,jsx,ts,tsx}',
+    ],
+    rules: {
+      'react-hooks/rules-of-hooks': 'off',
+      'react/no-deprecated': 'off',
+    },
+  },
+  {
+    // eslint.config.mjs itself imports eslint plugins as devDependencies;
+    // allow that since this file is part of the tooling, not the app.
+    files: ['eslint.config.mjs'],
+    rules: {
+      'import/no-extraneous-dependencies': ['error', { devDependencies: true }],
+    },
+  },
+  // eslint-config-prettier disables stylistic rules that conflict with
+  // prettier formatting. Placed last so it overrides rules pulled in by
+  // preceding configs (eslint:recommended, @typescript-eslint, react,
+  // jsx-a11y, ...).
+  prettier,
+  globalIgnores([
+    '**/data/',
+    'scripts/translations/.cache/',
+    '**/node_modules',
+    'frontend/js/vendor',
+    'modules/**/frontend/js/vendor',
+    'public/',
+    'frontend/js/features/source-editor/lezer-latex/latex.mjs',
+    'frontend/js/features/source-editor/lezer-latex/latex.terms.mjs',
+    'frontend/js/features/source-editor/lezer-bibtex/bibtex.mjs',
+    'frontend/js/features/source-editor/lezer-bibtex/bibtex.terms.mjs',
+    'frontend/js/features/source-editor/hunspell/wasm/hunspell.mjs',
+  ]),
+])
@@ -28,8 +28,8 @@
    "webpack:production": "webpack --config webpack.config.prod.js",
    "pyodide:fetch": "node scripts/fetch-pyodide-packages.mjs",
    "webpack:profile": "webpack --config webpack.config.prod.js --profile --json > stats.json",
-    "lint": "eslint --cache --cache-location ../../node_modules/.cache/eslint/ --max-warnings 0 --format unix --ext .js,.jsx,.mjs,.ts,.tsx .",
-    "lint:fix": "eslint --cache --cache-location ../../node_modules/.cache/eslint/ --fix --ext .js,.jsx,.mjs,.ts,.tsx .",
+    "lint": "eslint --cache --cache-location ../../node_modules/.cache/eslint/ --max-warnings 0 --format unix .",
+    "lint:fix": "eslint --cache --cache-location ../../node_modules/.cache/eslint/ --fix .",
    "lint:styles": "stylelint --cache --cache-location ../../node_modules/.cache/stylelint/ '**/*.scss'",
    "lint:styles:fix": "stylelint --cache --cache-location ../../node_modules/.cache/stylelint/ '**/*.scss' --fix",
    "type-check": "tsc --noEmit",
@@ -212,6 +212,8 @@
    "@codemirror/search": "6.5.8",
    "@codemirror/state": "6.5.4",
    "@codemirror/view": "6.38.6",
+    "@eslint/compat": "^2.1.0",
+    "@eslint/js": "^10.0.1",
    "@floating-ui/react": "^0.27.5",
    "@istanbuljs/esm-loader-hook": "^0.3.0",
    "@juggle/resize-observer": "^3.3.1",
@@ -222,6 +224,7 @@
    "@lezer/markdown": "1.6.3",
    "@overleaf/codemirror-tree-view": "^0.1.3",
    "@overleaf/dictionaries": "https://github.com/overleaf/dictionaries/archive/refs/tags/v0.0.3.tar.gz",
+    "@overleaf/eslint-plugin": "workspace:*",
    "@overleaf/ranges-tracker": "workspace:*",
    "@overleaf/stream-utils": "workspace:*",
    "@pmmmwh/react-refresh-webpack-plugin": "^0.6.2",
@@ -323,12 +326,18 @@
    "downshift": "^9.0.9",
    "es6-promise": "^4.2.8",
    "escodegen": "^2.0.0",
-    "eslint-config-standard-jsx": "^11.0.0",
-    "eslint-plugin-jsx-a11y": "^6.7.1",
-    "eslint-plugin-react": "^7.32.2",
-    "eslint-plugin-react-hooks": "^4.6.0",
+    "eslint-config-prettier": "^10.1.8",
+    "eslint-plugin-chai-expect": "^4.1.0",
+    "eslint-plugin-chai-friendly": "^1.2.0",
+    "eslint-plugin-import": "^2.32.0",
+    "eslint-plugin-jsx-a11y": "^6.10.2",
+    "eslint-plugin-mocha": "^11.3.0",
+    "eslint-plugin-n": "^18.0.1",
+    "eslint-plugin-promise": "^7.3.0",
+    "eslint-plugin-react": "^7.37.5",
+    "eslint-plugin-react-hooks": "^5.2.0",
    "eslint-plugin-storybook": "10.3.5",
-    "eslint-plugin-testing-library": "^7.1.1",
+    "eslint-plugin-testing-library": "7.5.3",
    "eslint-plugin-unicorn": "^56.0.0",
    "events": "^3.3.0",
    "eventsource-client": "^1.1.4",
@@ -337,7 +346,7 @@
    "fetch-mock": "^12.6.0",
    "formik": "^2.2.9",
    "glob": "^12.0.0",
-    "globals": "^16.2.0",
+    "globals": "^17.6.0",
    "handlebars": "^4.7.9",
    "handlebars-loader": "^1.7.3",
    "html-webpack-plugin": "^5.6.7",
@@ -14,7 +14,7 @@ describe('<FileViewRefreshButton />', function () {
    fetchMock.removeRoutes().clearHistory()
  })

-  // eslint-disable-next-line mocha/no-skipped-tests
+  // eslint-disable-next-line mocha/no-pending-tests
  it.skip('Changes text when the file is refreshing', async function () {
    fetchMock.post(
      'express:/project/:project_id/linked_file/:file_id/refresh',
@@ -493,10 +493,10 @@ describe('<ReviewPanel />', function () {
  })

  describe('aggregate change entries', function () {
-    // eslint-disable-next-line mocha/no-skipped-tests
+    // eslint-disable-next-line mocha/no-pending-tests
    it.skip('renders changed entries in current file mode', function () {})

-    // eslint-disable-next-line mocha/no-skipped-tests
+    // eslint-disable-next-line mocha/no-pending-tests
    it.skip('renders changed entries in overview mode', function () {})
  })

@@ -928,7 +928,7 @@ describe('<ReviewPanel /> for free users', function () {
    })
  })

-  // eslint-disable-next-line mocha/no-skipped-tests
+  // eslint-disable-next-line mocha/no-pending-tests
  it.skip('opens subscription page after clicking on `try it for free`', function () {})

  it('shows `ask project owner to upgrade` message', function () {
@@ -96,7 +96,7 @@ describe('keyboard shortcuts', { scrollBehavior: false }, function () {
  it('lowercase selection with {ctrl+shift+u}', function () {
    if (navigator.platform.startsWith('Linux')) {
      // Skip test as {ctrl+shift+u} is bound elsewhere in some Linux systems
-      // eslint-disable-next-line mocha/no-skipped-tests
+      // eslint-disable-next-line mocha/no-pending-tests
      this.skip()
    }

@@ -752,7 +752,7 @@ describe('<CodeMirrorEditor/> paste HTML in Visual mode', function () {
  })

  // FIXME: need to assert on source code
-  // eslint-disable-next-line mocha/no-skipped-tests
+  // eslint-disable-next-line mocha/no-pending-tests
  it.skip('tidies whitespace in pasted tables', function () {
    mountEditor()