fix: replace eslint with oxlint

.github/workflows/pull-request-build-lint-web-apps.yml

@@ -117,16 +117,54 @@ jobs:
           path: .turbo
           key: turbo-${{ runner.os }}-${{ github.event.pull_request.base.sha }}-${{ github.sha }}
 
-  # Lint and type checks depend on build artifacts
-  check:
-    name: ${{ matrix.task }}
+  # Lint check - no build dependency, OxLint is a standalone Rust binary
+  check-lint:
+    name: check:lint
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    if: |
+      github.event.pull_request.draft == false &&
+      github.event.pull_request.requested_reviewers != null
+    env:
+      TURBO_SCM_BASE: ${{ github.event.pull_request.base.sha }}
+      TURBO_SCM_HEAD: ${{ github.sha }}
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v6
+        with:
+          fetch-depth: 50
+          filter: blob:none
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v6
+
+      - name: Enable Corepack and pnpm
+        run: corepack enable pnpm
+
+      - name: Get pnpm store directory
+        shell: bash
+        run: echo "STORE_PATH=$(pnpm store path --silent)" >> $GITHUB_ENV
+
+      - name: Cache pnpm store
+        uses: actions/cache@v4
+        with:
+          path: ${{ env.STORE_PATH }}
+          key: pnpm-store-${{ runner.os }}-${{ hashFiles('**/pnpm-lock.yaml') }}
+          restore-keys: |
+            pnpm-store-${{ runner.os }}-
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Run check:lint
+        run: pnpm turbo run check:lint --affected
+
+  # Type check depends on build artifacts
+  check-types:
+    name: check:types
     runs-on: ubuntu-latest
     needs: build
     timeout-minutes: 15
-    strategy:
-      fail-fast: false
-      matrix:
-        task: [check:lint, check:types]
     env:
       TURBO_SCM_BASE: ${{ github.event.pull_request.base.sha }}
       TURBO_SCM_HEAD: ${{ github.sha }}
@@ -165,5 +203,5 @@ jobs:
       - name: Install dependencies
         run: pnpm install --frozen-lockfile
 
-      - name: Run ${{ matrix.task }}
-        run: pnpm turbo run ${{ matrix.task }} --affected
+      - name: Run check:types
+        run: pnpm turbo run check:types --affected

.oxlintrc.json

@@ -0,0 +1,49 @@
+{
+  "$schema": "./node_modules/oxlint/configuration_schema.json",
+  "plugins": ["react", "typescript", "jsx-a11y", "import", "promise", "unicorn", "oxc"],
+  "categories": {
+    "correctness": "warn",
+    "suspicious": "warn",
+    "perf": "warn"
+  },
+  "env": {
+    "browser": true,
+    "node": true,
+    "es2024": true
+  },
+  "settings": {
+    "react": {
+      "version": "18.3"
+    },
+    "jsx-a11y": {
+      "polymorphicPropName": "as"
+    }
+  },
+  "ignorePatterns": [
+    ".cache/**",
+    ".next/**",
+    ".react-router/**",
+    ".storybook/**",
+    ".turbo/**",
+    ".vite/**",
+    "*.config.{js,mjs,cjs,ts}",
+    "build/**",
+    "coverage/**",
+    "dist/**",
+    "**/public/**",
+    "storybook-static/**"
+  ],
+  "rules": {
+    "react/prop-types": "off",
+    "unicorn/filename-case": "off",
+    "unicorn/no-null": "off",
+    "unicorn/prevent-abbreviations": "off",
+    "no-unused-vars": ["warn", {
+      "argsIgnorePattern": "^_",
+      "varsIgnorePattern": "^_",
+      "caughtErrorsIgnorePattern": "^_",
+      "destructuredArrayIgnorePattern": "^_",
+      "ignoreRestSiblings": true
+    }]
+  }
+}

AGENTS.md

@@ -5,7 +5,7 @@
 - `pnpm dev` - Start all dev servers (web:3000, admin:3001)
 - `pnpm build` - Build all packages and apps
 - `pnpm check` - Run all checks (format, lint, types)
-- `pnpm check:lint` - ESLint across all packages
+- `pnpm check:lint` - OxLint across all packages
 - `pnpm check:types` - TypeScript type checking
 - `pnpm fix` - Auto-fix format and lint issues
 - `pnpm turbo run <command> --filter=<package>` - Target specific package/app
@@ -15,8 +15,8 @@
 
 - **Imports**: Use `workspace:*` for internal packages, `catalog:` for external deps
 - **TypeScript**: Strict mode enabled, all files must be typed
-- **Formatting**: Prettier with Tailwind plugin, run `pnpm fix:format`
-- **Linting**: ESLint with shared config, max warnings vary by package
+- **Formatting**: oxfmt, run `pnpm fix:format`
+- **Linting**: OxLint with shared `.oxlintrc.json` config
 - **Naming**: camelCase for variables/functions, PascalCase for components/types
 - **Error Handling**: Use try-catch with proper error types, log errors appropriately
 - **State Management**: MobX stores in `packages/shared-state`, reactive patterns

CONTRIBUTING.md

@@ -91,7 +91,7 @@ If you would like to _implement_ it, an issue with your proposal must be submitt
 To ensure consistency throughout the source code, please keep these rules in mind as you are working:
 
 - All features or bug fixes must be tested by one or more specs (unit-tests).
-- We lint with [ESLint 9](https://eslint.org/docs/latest/) using the shared `eslint.config.mjs` (type-aware via `typescript-eslint`) and format with [Prettier](https://prettier.io/) using `prettier.config.cjs`.
+- We lint with [OxLint](https://oxc.rs/docs/guide/usage/linter) using the shared `.oxlintrc.json` and format with [oxfmt](https://oxc.rs/docs/guide/usage/formatter) using `.oxfmtrc.json`.
 
 ## Ways to contribute
 

apps/admin/package.json

@@ -11,10 +11,10 @@
     "preview": "react-router build && serve -s build/client -l 3001",
     "start": "serve -s build/client -l 3001",
     "clean": "rm -rf .turbo && rm -rf .next && rm -rf node_modules && rm -rf dist && rm -rf build",
-    "check:lint": "eslint . --cache --cache-location node_modules/.cache/eslint/ --max-warnings=485",
+    "check:lint": "oxlint --max-warnings=758 .",
     "check:types": "react-router typegen && tsc --noEmit",
     "check:format": "oxfmt --check .",
-    "fix:lint": "eslint . --cache --cache-location node_modules/.cache/eslint/ --fix --max-warnings=485",
+    "fix:lint": "oxlint --fix .",
     "fix:format": "oxfmt ."
   },
   "dependencies": {

apps/live/package.json

@@ -19,10 +19,10 @@
     "test": "vitest run",
     "test:watch": "vitest",
     "test:coverage": "vitest run --coverage",
-    "check:lint": "eslint . --cache --cache-location node_modules/.cache/eslint/ --max-warnings=160",
+    "check:lint": "oxlint --max-warnings=119 .",
     "check:types": "tsc --noEmit",
     "check:format": "oxfmt --check .",
-    "fix:lint": "eslint . --cache --cache-location node_modules/.cache/eslint/ --fix --max-warnings=160",
+    "fix:lint": "oxlint --fix .",
     "fix:format": "oxfmt .",
     "clean": "rm -rf .turbo && rm -rf .next && rm -rf node_modules && rm -rf dist"
   },

apps/space/package.json

@@ -10,10 +10,10 @@
     "preview": "react-router build && PORT=3002 react-router-serve ./build/server/index.js",
     "start": "PORT=3002 react-router-serve ./build/server/index.js",
     "clean": "rm -rf .turbo && rm -rf .next && rm -rf .react-router && rm -rf node_modules && rm -rf dist && rm -rf build",
-    "check:lint": "eslint . --cache --cache-location node_modules/.cache/eslint/ --max-warnings=932",
+    "check:lint": "oxlint --max-warnings=675 .",
     "check:types": "react-router typegen && tsc --noEmit",
     "check:format": "oxfmt --check .",
-    "fix:lint": "eslint . --cache --cache-location node_modules/.cache/eslint/ --fix --max-warnings=932",
+    "fix:lint": "oxlint --fix .",
     "fix:format": "oxfmt ."
   },
   "dependencies": {

apps/web/package.json

@@ -10,10 +10,10 @@
     "preview": "react-router build && serve -s build/client -l 3000",
     "start": "serve -s build/client -l 3000",
     "clean": "rm -rf .turbo && rm -rf .next && rm -rf .react-router && rm -rf node_modules && rm -rf dist && rm -rf build",
-    "check:lint": "eslint . --cache --cache-location node_modules/.cache/eslint/ --max-warnings=14367",
+    "check:lint": "oxlint --max-warnings=11957 .",
     "check:types": "react-router typegen && tsc --noEmit",
     "check:format": "oxfmt --check .",
-    "fix:lint": "eslint . --cache --cache-location node_modules/.cache/eslint/ --fix --max-warnings=14367",
+    "fix:lint": "oxlint --fix .",
     "fix:format": "oxfmt ."
   },
   "dependencies": {

docs/linting.md

@@ -0,0 +1,92 @@
+# Linting in Plane - How It Works
+
+We use [OxLint](https://oxc.rs/docs/guide/usage/linter) for linting across the entire monorepo. OxLint is a single Rust binary that's 50-100x faster than ESLint, with zero Node.js dependencies at runtime.
+
+## Key Points
+
+1. **Single Root Config** - One `.oxlintrc.json` at the repo root handles all packages and apps
+2. **No Build Required** - OxLint doesn't need TypeScript build artifacts, so lint runs independently of build
+3. **Plugin Coverage** - react, typescript, jsx-a11y, import, promise, unicorn, oxc
+
+## How to Run
+
+From the root of the repo:
+
+```bash
+# Check for lint errors
+pnpm check:lint
+
+# Auto-fix lint errors
+pnpm fix:lint
+```
+
+To lint a specific package:
+
+```bash
+pnpm turbo run check:lint --filter=@plane/ui
+```
+
+## VS Code Integration
+
+Install the [OxLint extension](https://marketplace.visualstudio.com/items?itemName=nicolo-ribaudo.vscode-oxlint) for inline errors/warnings as you type.
+
+## What Gets Linted
+
+The config applies to all TypeScript and JavaScript files across:
+
+- `apps/web`, `apps/admin`, `apps/space`, `apps/live`
+- All packages in `packages/`
+
+**Ignored paths:**
+
+- `node_modules/`, `dist/`, `build/`, `.next/`, `.turbo/`
+- Config files (`*.config.{js,mjs,cjs,ts}`)
+- Public folders, coverage, storybook-static
+
+## Rules Overview
+
+OxLint uses category-based configuration:
+
+| Category        | Level | What It Catches                                    |
+| --------------- | ----- | -------------------------------------------------- |
+| **correctness** | error | Real bugs that will cause runtime errors            |
+| **suspicious**  | warn  | Code patterns that are likely mistakes              |
+| **perf**        | warn  | Performance anti-patterns                           |
+
+Additional rule overrides:
+- `react/prop-types` off (TypeScript handles prop validation)
+- `no-unused-vars` warns with `_` prefix pattern ignored
+- Several noisy unicorn rules disabled
+
+## Backward Compatibility
+
+OxLint supports `eslint-disable` comments, so existing inline suppressions continue to work.
+
+## Suppressing Warnings
+
+```typescript
+// Single line
+// eslint-disable-next-line no-unused-vars
+const data = response;
+
+// Block
+/* eslint-disable no-unused-vars */
+// ... code
+/* eslint-enable no-unused-vars */
+```
+
+**Please use sparingly** - most warnings indicate real issues that should be fixed.
+
+## Pre-commit Hook
+
+Lint-staged runs automatically on commit via Husky:
+
+- oxfmt formats your staged files
+- OxLint fixes what it can (with `--deny-warnings`)
+
+If the commit fails due to lint errors, fix them before committing.
+
+## Reference Files
+
+- [.oxlintrc.json](../.oxlintrc.json) - OxLint configuration
+- [package.json](../package.json) - Available scripts