diff --git a/package.json b/package.json
index 9a4a1fc..16eb3e3 100644
--- a/package.json
+++ b/package.json
@@ -15,6 +15,7 @@
   "devDependencies": {
     "@changesets/cli": "^2.28.1",
     "@typescript/native-preview": "^7.0.0-dev.0",
+    "@mikecbrant/prettier-config": "workspace:*",
     "prettier": "^3.3.3",
     "typescript": "^5.6.3"
   }
diff --git a/packages/eslint-config/config.mjs b/packages/eslint-config/config.mjs
index 3192059..68b03ca 100644
--- a/packages/eslint-config/config.mjs
+++ b/packages/eslint-config/config.mjs
@@ -13,18 +13,10 @@ export default [
 	// SonarJS recommended (flat)
 	sonarjs.configs.recommended,
 
-	// Strict overlays and additional plugins
+	// TypeScript-specific strict overrides
 	{
-		name: '@mikecbrant/eslint-config/strict-overrides',
-		files: [
-			'**/*.js',
-			'**/*.mjs',
-			'**/*.jsx',
-			'**/*.ts',
-			'**/*.mts',
-			'**/*.tsx',
-			'**/*.d.ts',
-		],
+		name: '@mikecbrant/eslint-config/strict-overrides:ts',
+		files: ['**/*.{ts,tsx,mts}'],
 		plugins: {
 			'@typescript-eslint': tsPlugin,
 			import: importPlugin,
@@ -32,7 +24,7 @@ export default [
 			'unused-imports': unusedImports,
 		},
 		languageOptions: {
-			ecmaVersion: 'latest',
+			ecmaVersion: 2023,
 			sourceType: 'module',
 			parser: tsParser,
 			parserOptions: {
@@ -55,7 +47,7 @@ export default [
 			'max-depth': ['error', 3],
 			'max-params': ['error', 4],
 
-			// TS hygiene
+			// TS hygiene (TS-only)
 			'@typescript-eslint/consistent-type-imports': [
 				'error',
 				{ prefer: 'type-imports', fixStyle: 'inline-type-imports' },
@@ -91,6 +83,60 @@ export default [
 		},
 	},
 
+	// JavaScript-specific strict overrides (no TS parser)
+	{
+		name: '@mikecbrant/eslint-config/strict-overrides:js',
+		files: ['**/*.{js,mjs,jsx}'],
+		plugins: {
+			import: importPlugin,
+			unicorn: unicornPlugin,
+			'unused-imports': unusedImports,
+		},
+		languageOptions: {
+			ecmaVersion: 2023,
+			sourceType: 'module',
+			parserOptions: {
+				ecmaFeatures: { jsx: true },
+			},
+		},
+		rules: {
+			// Confirmed strict thresholds (errors)
+			'max-lines-per-function': [
+				'error',
+				{ max: 60, skipComments: true, skipBlankLines: true },
+			],
+			complexity: ['error', 10],
+			'max-depth': ['error', 3],
+			'max-params': ['error', 4],
+
+			// Imports hygiene & sorting (no TS type group here)
+			'import/no-duplicates': 'error',
+			'import/order': [
+				'error',
+				{
+					groups: [
+						['builtin', 'external'],
+						'internal',
+						'parent',
+						'sibling',
+						'index',
+						'object',
+					],
+					alphabetize: { order: 'asc', caseInsensitive: true },
+					'newlines-between': 'always',
+				},
+			],
+			'unused-imports/no-unused-imports': 'error',
+
+			// Misc
+			'no-console': 'error',
+
+			// Tame a few unicorn defaults
+			'unicorn/prevent-abbreviations': 'off',
+			'unicorn/no-null': 'off',
+		},
+	},
+
 	// Explicitly omit CommonJS and TypeScript CJS
 	{ ignores: ['**/*.cjs', '**/*.cts'] },
 ]
diff --git a/packages/eslint-config/eslint.config.mjs b/packages/eslint-config/eslint.config.mjs
index 3d7a0cf..1f20cbb 100644
--- a/packages/eslint-config/eslint.config.mjs
+++ b/packages/eslint-config/eslint.config.mjs
@@ -5,7 +5,7 @@ import unusedImports from 'eslint-plugin-unused-imports'
 
 export default [
 	{
-		files: ['*.mjs'],
+		files: ['**/*.mjs'],
 		languageOptions: {
 			ecmaVersion: 2023,
 			sourceType: 'module',
diff --git a/packages/eslint-config/package.json b/packages/eslint-config/package.json
index 7b3aa74..e1387c8 100644
--- a/packages/eslint-config/package.json
+++ b/packages/eslint-config/package.json
@@ -28,6 +28,10 @@
 	"files": [
 		"index.mjs",
 		"config.mjs",
+		"eslint.config.mjs",
 		"README.md"
-	]
+	],
+	"devDependencies": {
+		"@mikecbrant/prettier-config": "workspace:*"
+	}
 }
diff --git a/packages/eslint-config/prettier.config.mjs b/packages/eslint-config/prettier.config.mjs
index 2f9238a..cedcde3 100644
--- a/packages/eslint-config/prettier.config.mjs
+++ b/packages/eslint-config/prettier.config.mjs
@@ -1,2 +1 @@
-// Delegate to the published Prettier config package by name to avoid cross-package relative paths.
 export { default } from '@mikecbrant/prettier-config'
diff --git a/packages/prettier-config/eslint.config.mjs b/packages/prettier-config/eslint.config.mjs
index 138a67d..335cdbb 100644
--- a/packages/prettier-config/eslint.config.mjs
+++ b/packages/prettier-config/eslint.config.mjs
@@ -1,2 +1 @@
-// Delegate to the published sibling package to avoid cross-package relative imports.
 export { default } from '@mikecbrant/eslint-config'
diff --git a/packages/prettier-config/package.json b/packages/prettier-config/package.json
index df6f231..0e4890b 100644
--- a/packages/prettier-config/package.json
+++ b/packages/prettier-config/package.json
@@ -18,5 +18,8 @@
 		"index.mjs",
 		"config.mjs",
 		"README.md"
-	]
+	],
+	"devDependencies": {
+		"@mikecbrant/eslint-config": "workspace:*"
+	}
 }
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 8b442ae..530babb 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -10,6 +10,9 @@ importers:
       "@changesets/cli":
         specifier: ^2.28.1
         version: 2.29.6
+      "@mikecbrant/prettier-config":
+        specifier: workspace:*
+        version: link:packages/prettier-config
       "@typescript/native-preview":
         specifier: ^7.0.0-dev.0
         version: 7.0.0-dev.20250901.1
@@ -59,6 +62,10 @@ importers:
       prettier:
         specifier: ^3.0.0
         version: 3.6.2
+    devDependencies:
+      "@mikecbrant/eslint-config":
+        specifier: workspace:*
+        version: link:../eslint-config
 
   packages/tsconfig:
     dependencies: