chore: switch from eslint to oxlint (#1514)

Replaces ESLint (and its `@typescript-eslint/*` and `unused-imports`
plugins) with [oxlint](https://oxc.rs) across the `js-sdk` and `cli`
packages. A root `.oxlintrc.json` replaces the three `.eslintrc.cjs`
files, the package `lint` scripts now run `oxlint`, the related
devDependencies are swapped for `oxlint`, and the lint CI path filter is
updated accordingly. Formatting rules
(`quotes`/`semi`/`linebreak-style`) are dropped because Prettier already
enforces them, and `no-unused-vars` is set to error to preserve the
previous unused-imports check. The one behavior change is that
`@typescript-eslint/member-ordering` has no oxlint equivalent and is no
longer enforced. `lint`, `typecheck`, and `prettier` all pass clean for
both packages.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: mishushakov

.eslintrc.cjs

@@ -24,7 +24,7 @@ jobs:
             code:
               - 'packages/**/!(*.md)'
               - 'spec/**/!(*.md)'
-              - '.eslintrc.cjs'
+              - '.oxlintrc.json'
               - '.prettierrc'
               - '.prettierignore'
               - '.editorconfig'

.github/workflows/lint.yml

@@ -0,0 +1,10 @@
+{
+  "$schema": "https://raw.githubusercontent.com/oxc-project/oxc/main/npm/oxlint/configuration_schema.json",
+  "ignorePatterns": ["**/dist/**", "**/node_modules/**", "**/*.gen.ts"],
+  "rules": {
+    "no-unused-vars": ["error", { "caughtErrors": "none" }],
+    "typescript/no-explicit-any": "off",
+    "typescript/ban-ts-comment": "off",
+    "unicorn/no-useless-fallback-in-spread": "off"
+  }
+}

.oxlintrc.json

@@ -17,11 +17,8 @@
     "@changesets/read": "^0.6.2"
   },
   "devDependencies": {
-    "@typescript-eslint/eslint-plugin": "^6.7.2",
-    "@typescript-eslint/parser": "^6.7.2",
     "changeset": "^0.2.6",
-    "eslint": "^8.57.1",
-    "eslint-plugin-unused-imports": "^3.0.0"
+    "oxlint": "^1.72.0"
   },
   "engines": {
     "pnpm": ">=9.0.0 <10"

package.json

@@ -39,7 +39,7 @@
     "build": "tsc --noEmit --skipLibCheck && tsup --minify",
     "dev": "tsup --watch",
     "typecheck": "tsc --noEmit --skipLibCheck",
-    "lint": "eslint src",
+    "lint": "oxlint --config ../../.oxlintrc.json src",
     "format": "prettier --write src",
     "test:interactive": "pnpm build && ./dist/index.js",
     "test": "vitest run",

packages/cli/.eslintrc.cjs

@@ -41,21 +41,18 @@
     "test:deno": "deno test tests/runtimes/deno/ --allow-net --allow-read --allow-env --unstable-sloppy-imports --trace-leaks",
     "test:integration": "E2B_INTEGRATION_TEST=1 vitest run tests/integration/**",
     "typecheck": "tsc --noEmit",
-    "lint": "eslint src/ tests/",
+    "lint": "oxlint --config ../../.oxlintrc.json src tests",
     "format": "prettier --write src/ tests/ example.mts"
   },
   "devDependencies": {
     "@testing-library/react": "^16.2.0",
     "@types/node": "^20.19.19",
     "@types/platform": "^1.3.6",
     "@types/react": "^18.3.11",
-    "@typescript-eslint/eslint-plugin": "^7.11.0",
-    "@typescript-eslint/parser": "^7.11.0",
     "@vitejs/plugin-react": "^4.3.4",
     "@vitest/browser": "^4.1.0",
     "@vitest/browser-playwright": "^4.1.0",
     "dotenv": "^16.4.5",
-    "eslint": "^8.57.1",
     "json-schema-to-typescript": "^15.0.4",
     "knip": "^5.43.6",
     "msw": "^2.12.10",

packages/cli/package.json

@@ -300,6 +300,8 @@ export function callsites(depth: number): NodeJS.CallSite[] {
       return callSitesWithoutCurrent
     }
 
+    // Accessing `.stack` triggers `Error.prepareStackTrace` for its side effect.
+    // oxlint-disable-next-line no-unused-expressions
     new Error().stack
     return result
   } finally {