feat(eslint-config): move eslint and typescript-eslint to peer deps

.changeset/eslint-config-peer-deps.md

@@ -0,0 +1,15 @@
+---
+'@fingerprintjs/eslint-config-dx-team': major
+---
+
+Move `eslint` and `typescript-eslint` to peer dependencies
+
+Under strict package managers (pnpm v10+), transitive dependencies are no longer exposed at the project root, which broke `eslint` bin resolution and `import ... from 'typescript-eslint'` in consuming projects. Declaring them as peers guarantees a single, project-controlled instance of each and avoids "multiple ESLint instances" errors.
+
+**Breaking change:** consumers must now install `eslint` and `typescript-eslint` themselves (plus `typescript`, which `typescript-eslint` requires as a peer):
+
+```bash
+pnpm install -D eslint typescript-eslint typescript
+```
+
+The redundant `@typescript-eslint/eslint-plugin` and `@typescript-eslint/parser` direct dependencies were also removed (they are provided by the `typescript-eslint` umbrella package). `eslint-config-prettier`, `eslint-plugin-prettier`, and `globals` remain bundled.

.github/actions/update-sdk-schema/update-schema.test.ts

@@ -28,7 +28,7 @@ const orgFetch = globalThis.fetch
 
 describe('Update schema', () => {
   let pkg: ReturnType<typeof createTestPkg>
-  
+
   beforeEach(() => {
     jest.clearAllMocks()
 

package.json

@@ -35,10 +35,11 @@
     "human-id": "^4.1.1",
     "husky": "^8.0.3",
     "jest": "^29.7.0",
-    "prettier": "^2.8.8",
+    "prettier": "^3.2.4",
     "ts-jest": "^29.1.2",
     "tsup": "^8.2.4",
     "typescript": "^5.4.2",
+    "typescript-eslint": "^8.60.0",
     "unzipper": "^0.12.3"
   },
   "dependencies": {

packages/eslint-config-dx-team/README.md

@@ -4,14 +4,17 @@ This package provides a custom preset for [eslint](https://github.com/eslint/esl
 
 ## Requirements
 
-- Prettier v3+
+- ESLint v10
+- `typescript-eslint` v8
+- TypeScript v5 (peer dependency of `typescript-eslint`)
+- Prettier v3
 
 ## Installation
 
-To install this package, use the following command:
+`eslint`, `typescript-eslint`, `typescript`, and `prettier` are peer dependencies, so install them alongside the config:
 
 ```bash
-pnpm install -D @fingerprintjs/eslint-config-dx-team prettier
+pnpm install -D @fingerprintjs/eslint-config-dx-team eslint typescript-eslint typescript prettier
 ```
 
 ## Configuration
@@ -78,15 +81,18 @@ export default [
 
 ## Dependencies
 
-To simplify dependencies update in project this package has eslint and eslint packages as a dependencies. Please don't add any of them as a dependencies for you project:
+`eslint` and `typescript-eslint` are declared as **peer dependencies**. Your project imports both directly (ESLint provides the CLI/bin you run, and your `eslint.config` typically imports `typescript-eslint`), and both need to resolve to a single instance to avoid "multiple ESLint instances" errors — so you must install them in your project:
 
-- `@typescript-eslint/eslint-plugin`
-- `@typescript-eslint/parser`
 - `eslint`
+- `typescript-eslint` (which in turn requires `typescript`)
+
+Everything else is bundled by this package — **don't** add these to your project:
+
 - `eslint-config-prettier`
 - `eslint-plugin-prettier`
 - `globals`
-- `typescript-eslint`
+
+> **Note:** Under strict package managers such as pnpm v10+, transitive dependencies are no longer hoisted to the project root, which is why `eslint` and `typescript-eslint` must be declared as peers rather than bundled.
 
 ## License
 

packages/eslint-config-dx-team/package.json

@@ -23,16 +23,14 @@
     "type-checked.js"
   ],
   "dependencies": {
-    "@typescript-eslint/eslint-plugin": "^8.60.0",
-    "@typescript-eslint/parser": "^8.60.0",
-    "eslint": "10.4.1",
     "eslint-config-prettier": "^9.1.0",
     "eslint-plugin-prettier": "^5.1.3",
-    "globals": "^15.0.0",
-    "typescript-eslint": "^8.60.0"
+    "globals": "^15.0.0"
   },
   "peerDependencies": {
-    "prettier": ">=3"
+    "eslint": "^10.0.0",
+    "typescript-eslint": "^8.0.0",
+    "prettier": "^3.0.0"
   },
   "engines": {
     "node": "^20.19.0 || ^22.13.0 || >=24"