feat: support @eslint/json

README.md

@@ -44,9 +44,29 @@ For older legacy projects, add to your `.eslintrc.json`:
 
 Some rules (e.g. `ban-dependencies`) can be used against your `package.json`.
 
-You can achieve this by using `jsonc-eslint-parser`.
+You can achieve this by using `@eslint/json` or `jsonc-eslint-parser`.
 
-For example, in your `.eslintrc.json`:
+For example, with `@eslint/json` and `eslint.config.js`:
+
+```ts
+import depend from 'eslint-plugin-depend';
+import json from '@eslint/json';
+import {defineConfig} from 'eslint/config';
+
+export default defineConfig([
+  {
+    files: ['package.json'],
+    language: 'json/json',
+    plugins: {
+      depend,
+      json
+    },
+    extends: ['depend/flat/recommended'],
+  }
+]);
+```
+
+Or with `jsonc-eslint-parser` and `.eslintrc.json`:
 
 ```json
 {
@@ -64,6 +84,7 @@ For example, in your `.eslintrc.json`:
 ```
 
 Read more at the
+[`@eslint/json` docs](https://github.com/eslint/json) and
 [`jsonc-eslint-parser` docs](https://github.com/ota-meshi/jsonc-eslint-parser).
 
 ## Rules

package.json

@@ -45,6 +45,8 @@
   },
   "devDependencies": {
     "@eslint/js": "^9.35.0",
+    "@eslint/json": "^0.13.2",
+    "@humanwhocodes/momoa": "^3.3.9",
     "@types/eslint": "^9.6.1",
     "@types/estree": "^1.0.8",
     "@types/node": "^24.4.0",

src/test/rules/ban-dependencies_test.ts

@@ -1,6 +1,7 @@
-import {runClassic} from 'eslint-vitest-rule-tester';
+import {run, runClassic} from 'eslint-vitest-rule-tester';
 import * as tseslintParser from '@typescript-eslint/parser';
 import * as jsonParser from 'jsonc-eslint-parser';
+import eslintJson from '@eslint/json';
 
 import {rule} from '../../rules/ban-dependencies.js';
 import {getMdnUrl, getReplacementsDocUrl} from '../../util/rule-meta.js';
@@ -264,3 +265,65 @@ await runClassic('ban-dependencies', rule, {
     }
   ]
 });
+
+// Test using `@eslint/json` plugin
+run({
+  name: 'ban-dependencies-json',
+  configs: [
+    {
+      files: ['**/*.json'],
+      language: 'json/json',
+      plugins: {
+        json: eslintJson
+      }
+    }
+  ],
+  rule,
+  valid: [
+    {
+      code: `{
+        "dependencies": {
+          "unknown-module": "^1.0.0"
+        }
+      }`,
+      filename: 'package.json'
+    },
+    {
+      code: `{
+        "dependencies": {
+          "npm-run-all": "^1.0.0"
+        }
+      }`,
+      filename: 'not-a-package.json'
+    },
+    {
+      code: `{
+        "not-dependencies": {
+          "some-other-nonsense": 123
+        }
+      }`,
+      filename: 'package.json'
+    }
+  ],
+  invalid: [
+    {
+      code: `{
+        "dependencies": {
+          "npm-run-all": "^1.0.0"
+        }
+      }`,
+      filename: 'package.json',
+      errors: [
+        {
+          line: 3,
+          column: 11,
+          messageId: 'documentedReplacement',
+          data: {
+            name: 'npm-run-all',
+            url: getReplacementsDocUrl('npm-run-all')
+          }
+        }
+      ]
+    }
+  ]
+});

src/util/imports.ts

@@ -2,6 +2,7 @@ import type {Rule} from 'eslint';
 import {TSESTree} from '@typescript-eslint/typescript-estree';
 import {closestPackageSatisfiesNodeVersion} from './package-json.js';
 import {getMdnUrl, getReplacementsDocUrl} from './rule-meta.js';
+import type {MemberNode} from '@humanwhocodes/momoa';
 import type {AST as JsonESTree} from 'jsonc-eslint-parser';
 import type {ModuleReplacement} from 'module-replacements';
 
@@ -154,6 +155,25 @@ export function createPackageJsonListener(
   callback: ImportListenerCallback
 ): Rule.RuleListener {
   return {
+    // Support for `@eslint/json`
+    'Document > Object > Member': (node: MemberNode) => {
+      if (
+        node.name.type === 'String' &&
+        dependencyKeys.includes(node.name.value) &&
+        node.value.type === 'Object'
+      ) {
+        for (const member of node.value.members) {
+          if (member.name.type === 'String') {
+            callback(
+              context,
+              member as unknown as Rule.Node,
+              member.name.value
+            );
+          }
+        }
+      }
+    },
+    // Support for `jsonc-eslint-parser`
     'Program > JSONExpressionStatement > JSONObjectExpression > JSONProperty': (
       astNode: Rule.Node
     ) => {