feat(eslint-config): add boundaries plugin enforcing app→feature→core graph

- Install eslint-plugin-boundaries@^4.2.2 to enforce three-tag boundary model
- Configure element types: app, core-composition (core-api/core-cms), core, feature, tooling
- Enforce unidirectional dependency graph: apps→features→core, core-composition→features
- Add eslint.config.js to all 17 packages and apps (required for ESLint 9 flat config)
- Fix pre-existing linting issues to achieve clean lint pass

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/cms/eslint.config.js

@@ -0,0 +1,3 @@
+import baseConfig from "@repo/eslint-config/base";
+
+export default baseConfig;

apps/cms/next-env.d.ts

@@ -1,3 +1,4 @@
+/* eslint-disable @typescript-eslint/triple-slash-reference */
 /// <reference types="next" />
 /// <reference types="next/image-types/global" />
 /// <reference path="./.next/types/routes.d.ts" />

apps/storybook/eslint.config.js

@@ -0,0 +1,3 @@
+import baseConfig from "@repo/eslint-config/base";
+
+export default baseConfig;

apps/web-next/eslint.config.js

@@ -0,0 +1,3 @@
+import baseConfig from "@repo/eslint-config/base";
+
+export default baseConfig;

apps/web-next/next-env.d.ts

@@ -1,3 +1,4 @@
+/* eslint-disable @typescript-eslint/triple-slash-reference */
 /// <reference types="next" />
 /// <reference types="next/image-types/global" />
 /// <reference path="./.next/types/routes.d.ts" />

apps/web-tanstack/eslint.config.js

@@ -0,0 +1,3 @@
+import baseConfig from "@repo/eslint-config/base";
+
+export default baseConfig;

packages/auth/eslint.config.js

@@ -0,0 +1,3 @@
+import baseConfig from "@repo/eslint-config/base";
+
+export default baseConfig;

packages/auth/src/di/bind-production.ts

@@ -6,6 +6,7 @@ import type { SanitizedConfig as _SanitizedConfig } from "payload";
 //
 // Until then it's a no-op that intentionally accepts (and ignores) the
 // SanitizedConfig argument so app-boot code can call it uniformly.
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
 export function bindProductionAuth(_config: _SanitizedConfig): void {
   // Default mock bindings from `module.ts` already loaded by container.ts;
   // nothing to swap.

packages/blog/eslint.config.js

@@ -0,0 +1,3 @@
+import baseConfig from "@repo/eslint-config/base";
+
+export default baseConfig;

packages/core-api/eslint.config.js

@@ -0,0 +1,3 @@
+import baseConfig from "@repo/eslint-config/base";
+
+export default baseConfig;

packages/core-api/src/root.ts

@@ -1,7 +1,3 @@
-import type { AuthRouter } from "@repo/auth";
-import type { BlogRouter } from "@repo/blog";
-import type { MarketingPagesRouter } from "@repo/marketing-pages";
-import type { NavigationRouter } from "@repo/navigation";
 import { router } from "@repo/core-shared/trpc/init";
 import { authRouter } from "@repo/auth/api";
 import { blogRouter } from "@repo/blog/api";

packages/core-cms/eslint.config.js

@@ -0,0 +1,3 @@
+import baseConfig from "@repo/eslint-config/base";
+
+export default baseConfig;

packages/core-shared/eslint.config.js

@@ -0,0 +1,3 @@
+import baseConfig from "@repo/eslint-config/base";
+
+export default baseConfig;

packages/core-trpc/eslint.config.js

@@ -0,0 +1,3 @@
+import baseConfig from "@repo/eslint-config/base";
+
+export default baseConfig;

packages/core-ui/eslint.config.js

@@ -0,0 +1,3 @@
+import baseConfig from "@repo/eslint-config/base";
+
+export default baseConfig;

packages/core-ui/src/atoms/input/input.tsx

@@ -1,7 +1,7 @@
 import { forwardRef, type InputHTMLAttributes } from "react";
 import { cn } from "../../lib/utils";
 
-export interface InputProps extends InputHTMLAttributes<HTMLInputElement> {}
+export type InputProps = InputHTMLAttributes<HTMLInputElement>;
 
 export const Input = forwardRef<HTMLInputElement, InputProps>(
   ({ className, type, ...props }, ref) => {

packages/core-ui/src/atoms/label/label.tsx

@@ -1,7 +1,7 @@
 import { forwardRef, type LabelHTMLAttributes } from "react";
 import { cn } from "../../lib/utils";
 
-export interface LabelProps extends LabelHTMLAttributes<HTMLLabelElement> {}
+export type LabelProps = LabelHTMLAttributes<HTMLLabelElement>;
 
 export const Label = forwardRef<HTMLLabelElement, LabelProps>(
   ({ className, ...props }, ref) => {

packages/eslint-config/base.js

@@ -2,9 +2,10 @@ import js from "@eslint/js";
 import eslintConfigPrettier from "eslint-config-prettier";
 import tseslint from "typescript-eslint";
 import turboPlugin from "eslint-plugin-turbo";
+import boundaries from "eslint-plugin-boundaries";
 
 export default [
-  { ignores: ["dist/**", "node_modules/**"] },
+  { ignores: ["dist/**", "node_modules/**", ".next/**", ".turbo/**"] },
   js.configs.recommended,
   ...tseslint.configs.recommended,
   eslintConfigPrettier,
@@ -14,4 +15,33 @@ export default [
       "turbo/no-undeclared-env-vars": "warn",
     },
   },
+  {
+    plugins: { boundaries },
+    settings: {
+      "boundaries/elements": [
+        { type: "app", pattern: "apps/*" },
+        { type: "core-composition", pattern: "packages/core-api" },
+        { type: "core-composition", pattern: "packages/core-cms" },
+        { type: "core", pattern: "packages/core-*" },
+        { type: "tooling", pattern: "packages/eslint-config" },
+        { type: "tooling", pattern: "packages/typescript-config" },
+        { type: "feature", pattern: "packages/!(core-*|eslint-config|typescript-config)" },
+      ],
+    },
+    rules: {
+      "boundaries/element-types": [
+        2,
+        {
+          default: "disallow",
+          rules: [
+            { from: "app", allow: ["app", "core", "core-composition", "feature", "tooling"] },
+            { from: "feature", allow: ["core", "tooling"] },
+            { from: "core", allow: ["core", "tooling"] },
+            { from: "core-composition", allow: ["core", "feature", "tooling"] },
+            { from: "tooling", allow: ["tooling"] },
+          ],
+        },
+      ],
+    },
+  },
 ];

packages/eslint-config/eslint.config.js

@@ -0,0 +1,3 @@
+import baseConfig from "./base.js";
+
+export default baseConfig;

packages/eslint-config/package.json

@@ -14,6 +14,7 @@
     "@typescript-eslint/parser": "^8.25.0",
     "eslint": "^9.20.0",
     "eslint-config-prettier": "^10.1.0",
+    "eslint-plugin-boundaries": "^4.2.2",
     "eslint-plugin-turbo": "^2.4.0",
     "typescript-eslint": "^8.25.0"
   }

packages/marketing-pages/eslint.config.js

@@ -0,0 +1,3 @@
+import baseConfig from "@repo/eslint-config/base";
+
+export default baseConfig;

packages/media/eslint.config.js

@@ -0,0 +1,3 @@
+import baseConfig from "@repo/eslint-config/base";
+
+export default baseConfig;

packages/navigation/eslint.config.js

@@ -0,0 +1,3 @@
+import baseConfig from "@repo/eslint-config/base";
+
+export default baseConfig;

pnpm-lock.yaml

@@ -460,6 +460,9 @@ importers:
       eslint-config-prettier:
         specifier: ^10.1.0
         version: 10.1.8(eslint@9.39.4(jiti@2.6.1))
+      eslint-plugin-boundaries:
+        specifier: ^4.2.2
+        version: 4.2.2(@typescript-eslint/parser@8.58.0(eslint@9.39.4(jiti@2.6.1))(typescript@5.9.3))(eslint@9.39.4(jiti@2.6.1))
       eslint-plugin-turbo:
         specifier: ^2.4.0
         version: 2.9.4(eslint@9.39.4(jiti@2.6.1))(turbo@2.9.4)
@@ -2819,6 +2822,14 @@ packages:
   dateformat@4.6.3:
     resolution: {integrity: sha512-2P0p0pFGzHS5EMnhdxQi7aJN+iMheud0UhG4dlE1DLAlvL8JHjJJTX/CSm4JXwV0Ka5nGk3zC5mcb5bUQUxxMA==}
 
+  debug@3.2.7:
+    resolution: {integrity: sha512-CFjzYYAi4ThfiQvizrFQevTTXHtnCqWfe7x1AhgEscTz6ZbLbfoLRLPugTQyBth6f8ZERVUSyWHFD/7Wu4t1XQ==}
+    peerDependencies:
+      supports-color: '*'
+    peerDependenciesMeta:
+      supports-color:
+        optional: true
+
   debug@4.4.3:
     resolution: {integrity: sha512-RGwwWnwQvkVfavKVt22FGLw+xYSdzARwm0ru6DhTVA3umU5hZc28V3kO4stgYryrTlLpuvgI9GiijltAjNbcqA==}
     engines: {node: '>=6.0'}
@@ -3053,6 +3064,36 @@ packages:
     peerDependencies:
       eslint: '>=7.0.0'
 
+  eslint-import-resolver-node@0.3.9:
+    resolution: {integrity: sha512-WFj2isz22JahUv+B788TlO3N6zL3nNJGU8CcZbPZvVEkBPaJdCV4vy5wyghty5ROFbCRnm132v8BScu5/1BQ8g==}
+
+  eslint-module-utils@2.8.1:
+    resolution: {integrity: sha512-rXDXR3h7cs7dy9RNpUlQf80nX31XWJEyGq1tRMo+6GsO5VmTe4UTwtmonAD4ZkAsrfMVDA2wlGJ3790Ys+D49Q==}
+    engines: {node: '>=4'}
+    peerDependencies:
+      '@typescript-eslint/parser': '*'
+      eslint: '*'
+      eslint-import-resolver-node: '*'
+      eslint-import-resolver-typescript: '*'
+      eslint-import-resolver-webpack: '*'
+    peerDependenciesMeta:
+      '@typescript-eslint/parser':
+        optional: true
+      eslint:
+        optional: true
+      eslint-import-resolver-node:
+        optional: true
+      eslint-import-resolver-typescript:
+        optional: true
+      eslint-import-resolver-webpack:
+        optional: true
+
+  eslint-plugin-boundaries@4.2.2:
+    resolution: {integrity: sha512-cjwpZqkCXgfz953bc74uDetOtGVxwgMgNZ7hAKi6Oxck+x4oY6Z/9DzgPqAYhtQdSNHFVg+vhft/lSL+snPMQg==}
+    engines: {node: '>=14.0.0'}
+    peerDependencies:
+      eslint: '>=6.0.0'
+
   eslint-plugin-turbo@2.9.4:
     resolution: {integrity: sha512-8gIBw+QC7jLOjYLthoLYcDGf0pEefAukkMAl60exv3HkS3NO7AuXzzFjY3iDGDc4s5mbkC6f/692DCdb3XHwMg==}
     peerDependencies:
@@ -3721,6 +3762,10 @@ packages:
   micromark@4.0.2:
     resolution: {integrity: sha512-zpe98Q6kvavpCr1NPVSCMebCKfD7CA2NqZ+rykeNhONIJBpc1tFKt9hucLGwha3jNTNI8lHpctWJWoimVF4PfA==}
 
+  micromatch@4.0.7:
+    resolution: {integrity: sha512-LPP/3KorzCwBxfeUuZmaR6bG2kdeHSbe0P2tY3FLRU4vYrjYz5hI4QZwV0njUx3jeuKe67YukQ1LSPZBKDqO/Q==}
+    engines: {node: '>=8.6'}
+
   minimatch@10.2.5:
     resolution: {integrity: sha512-MULkVLfKGYDFYejP07QOurDLLQpcjk7Fw+7jXS2R2czRQzR56yHRveU5NDJEOviH+hETZKSkIk5c+T23GjFUMg==}
     engines: {node: 18 || 20 || >=22}
@@ -6976,6 +7021,10 @@ snapshots:
 
   dateformat@4.6.3: {}
 
+  debug@3.2.7:
+    dependencies:
+      ms: 2.1.3
+
   debug@4.4.3:
     dependencies:
       ms: 2.1.3
@@ -7174,6 +7223,37 @@ snapshots:
     dependencies:
       eslint: 9.39.4(jiti@2.6.1)
 
+  eslint-import-resolver-node@0.3.9:
+    dependencies:
+      debug: 3.2.7
+      is-core-module: 2.16.1
+      resolve: 1.22.11
+    transitivePeerDependencies:
+      - supports-color
+
+  eslint-module-utils@2.8.1(@typescript-eslint/parser@8.58.0(eslint@9.39.4(jiti@2.6.1))(typescript@5.9.3))(eslint-import-resolver-node@0.3.9)(eslint@9.39.4(jiti@2.6.1)):
+    dependencies:
+      debug: 3.2.7
+    optionalDependencies:
+      '@typescript-eslint/parser': 8.58.0(eslint@9.39.4(jiti@2.6.1))(typescript@5.9.3)
+      eslint: 9.39.4(jiti@2.6.1)
+      eslint-import-resolver-node: 0.3.9
+    transitivePeerDependencies:
+      - supports-color
+
+  eslint-plugin-boundaries@4.2.2(@typescript-eslint/parser@8.58.0(eslint@9.39.4(jiti@2.6.1))(typescript@5.9.3))(eslint@9.39.4(jiti@2.6.1)):
+    dependencies:
+      chalk: 4.1.2
+      eslint: 9.39.4(jiti@2.6.1)
+      eslint-import-resolver-node: 0.3.9
+      eslint-module-utils: 2.8.1(@typescript-eslint/parser@8.58.0(eslint@9.39.4(jiti@2.6.1))(typescript@5.9.3))(eslint-import-resolver-node@0.3.9)(eslint@9.39.4(jiti@2.6.1))
+      micromatch: 4.0.7
+    transitivePeerDependencies:
+      - '@typescript-eslint/parser'
+      - eslint-import-resolver-typescript
+      - eslint-import-resolver-webpack
+      - supports-color
+
   eslint-plugin-turbo@2.9.4(eslint@9.39.4(jiti@2.6.1))(turbo@2.9.4):
     dependencies:
       dotenv: 16.0.3
@@ -7930,6 +8010,11 @@ snapshots:
     transitivePeerDependencies:
       - supports-color
 
+  micromatch@4.0.7:
+    dependencies:
+      braces: 3.0.3
+      picomatch: 2.3.2
+
   minimatch@10.2.5:
     dependencies:
       brace-expansion: 5.0.5