[eslint-config] Remove rig ignore stopgap and eliminate config casts

common/changes/@rushstack/eslint-config/eslint-config-followups_2026-09-22-04-00-00.json

@@ -0,0 +1,9 @@
+{
+  "changes": [
+    {
+      "packageName": "@rushstack/eslint-config",
+      "comment": "",
+      "type": "none"
+    }
+  ]
+}

eslint/eslint-config/src/flat/mixins/friendly-locals.ts

@@ -28,8 +28,7 @@ import typescriptEslintPlugin from '@typescript-eslint/eslint-plugin';
 // The third-party @typescript-eslint plugin does not present itself as an `ESLint.Plugin` (its typescript-eslint
 // `RuleModule` types are intentionally not assignable to ESLint's `RuleDefinition`), so widen it through
 // `object` to reference it in a flat-config `plugins` map.
-const typescriptEslintPluginAsEslintPlugin: ESLint.Plugin =
-  typescriptEslintPlugin as unknown as ESLint.Plugin;
+const typescriptEslintPluginAsEslintPlugin: ESLint.Plugin = typescriptEslintPlugin as object as ESLint.Plugin;
 
 const config: Linter.Config[] = [
   {

eslint/eslint-config/src/flat/profile/_common.ts

@@ -21,7 +21,6 @@
 // - An obsolete language feature that nobody should be using for any good reason
 
 import type { ESLint, Linter } from 'eslint';
-import { globalIgnores } from 'eslint/config';
 import promiseEslintPlugin from 'eslint-plugin-promise';
 import typescriptEslintPlugin from '@typescript-eslint/eslint-plugin';
 // `@typescript-eslint/parser` marks its CommonJS export with `__esModule` but exposes the parser API
@@ -240,14 +239,14 @@ const commonConfig: Linter.Config[] = [
   // Manually authored .d.ts files are generally used to describe external APIs that are  not expected
   // to follow our coding conventions.  Linting those files tends to produce a lot of spurious suppressions,
   // so we simply ignore them.
-  globalIgnores(['**/*.d.ts']) as Linter.Config,
+  { name: 'ignore-d-ts', ignores: ['**/*.d.ts'] },
 
   // Build output and other generated folders are not source code and should never be linted.  This is
   // particularly important for tools that enumerate files from the ESLint configuration itself (rather than
   // only linting a known set of source files), since ESLint's flat config does not respect ".gitignore".
   // These patterns are anchored to the project root (they are evaluated relative to the cwd), so a source
   // folder such as "src/lib" is not affected.
-  globalIgnores(['lib/**', 'lib-*/**', 'dist/**', 'temp/**', 'coverage/**']) as Linter.Config,
+  { name: 'ignore-build-output', ignores: ['lib/**', 'lib-*/**', 'dist/**', 'temp/**', 'coverage/**'] },
 
   {
     files: ['**/*.ts', '**/*.tsx'],

rigs/decoupled-local-node-rig/profiles/default/includes/eslint/flat/profile/_common.js

@@ -59,14 +59,6 @@ const localTypeAwareRules = {
 module.exports = {
   localTypeAwareRules,
   localCommonConfig: [
-    // Build output and other generated folders are not source code and should never be linted. (This is also
-    // globally ignored by newer versions of @rushstack/eslint-config; it is repeated here so that projects
-    // consuming the currently-published version via this rig also ignore them. Remove once the dependency is
-    // bumped.) These patterns are anchored to the project root, so a source folder such as "src/lib" is not
-    // affected.
-    {
-      ignores: ['lib/**', 'lib-*/**', 'dist/**', 'temp/**', 'coverage/**']
-    },
     {
       files: ['**/*.ts', '**/*.tsx'],
       plugins: {