build: exclude snap packages from root linting

Snap packages carry older tooling (ESLint v8, Prettier v2) and
different configs that are incompatible with the monorepo's current
setup. Exclude packages/snaps/** from ESLint and oxfmt until a
follow-up aligns them.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: ccharly

.prettierignore

@@ -0,0 +1,3 @@
+# Snap packages use older tooling (Prettier v2, different configs).
+# Formatting will be aligned in a follow-up.
+packages/snaps/

eslint.config.mjs

@@ -16,6 +16,9 @@ const config = createConfig([
       '**/dist/**',
       '**/docs/**',
       '**/coverage/**',
+      // Snap packages use older tooling (ESLint v8, different configs).
+      // Linting will be aligned in a follow-up.
+      'packages/snaps/**',
     ],
   },
 

package.json

@@ -28,7 +28,7 @@
     "lint:dependencies:fix": "yarn foreach depcheck && yarn dedupe",
     "lint:eslint": "yarn build:only-clean && yarn eslint",
     "lint:fix": "yarn lint:eslint --fix --prune-suppressions && yarn lint:misc --write && yarn constraints --fix && yarn lint:dependencies:fix",
-    "lint:misc": "oxfmt --ignore-path .gitignore",
+    "lint:misc": "oxfmt --ignore-path .gitignore --ignore-path .prettierignore",
     "lint:misc:check": "yarn lint:misc --check",
     "lint:readme": "yarn readme:update",
     "prepare:preview": "ts-node --project tsconfig.scripts.json scripts/prepare-preview-builds.ts",

yarn.config.cjs

@@ -52,20 +52,20 @@ const ALLOWED_INCONSISTENT_DEPENDENCIES = {
   '@metamask/eth-sig-util': ['^7.0.1'],
   '@metamask/snaps-sdk': ['^11.0.0', '^11.1.0'],
   '@types/node': ['^20.6.2'],
-  'depcheck': ['^1.4.6'],
-  'eslint': ['^8.21.0', '^8.36.0'],
+  depcheck: ['^1.4.6'],
+  eslint: ['^8.21.0', '^8.36.0'],
   'eslint-config-prettier': ['^8.1.0', '^8.7.0'],
   'eslint-plugin-import': ['^2.26.0', '^2.27.5'],
   'eslint-plugin-jest': ['^26.8.2', '^27.2.1'],
   'eslint-plugin-jsdoc': ['^39.2.9', '^40.0.3'],
   'eslint-plugin-n': ['^16.1.0', '^16.6.2'],
   'eslint-plugin-prettier': ['^4.2.1'],
   'eslint-plugin-promise': ['^6.1.1'],
-  'prettier': ['^2.2.1', '^2.8.4'],
-  'rimraf': ['^3.0.2', '^4.4.0'],
-  'typescript': ['^4.7.4', '^4.9.5'],
-  'uuid': ['^9.0.0'],
-  'semver': ['^7.5.4'],
+  prettier: ['^2.2.1', '^2.8.4'],
+  rimraf: ['^3.0.2', '^4.4.0'],
+  typescript: ['^4.7.4', '^4.9.5'],
+  uuid: ['^9.0.0'],
+  semver: ['^7.5.4'],
 };
 
 /**