diff --git a/.npmrc b/.npmrc
new file mode 100644
index 0000000..6283358
--- /dev/null
+++ b/.npmrc
@@ -0,0 +1 @@
+@avalon-vanguard:registry=https://git.avalonvanguard.com/api/packages/avalon-vanguard/npm/
diff --git a/eslint.config.mjs b/eslint.config.mjs
index a8bc185..ca78d48 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -1,4 +1,4 @@
-import eslint from '@eslint/js';
+import avalonBase from '@avalon-vanguard/config/eslint';
 import tseslint from 'typescript-eslint';
 import globals from 'globals';
 
@@ -6,8 +6,8 @@ export default tseslint.config(
   {
     ignores: ['dist/**', 'node_modules/**', 'coverage/**', 'docs/**'],
   },
-  eslint.configs.recommended,
-  ...tseslint.configs.recommended,
+  // @eslint/js recommended + typescript-eslint recommended, shared across avalon-vanguard
+  avalonBase,
   {
     languageOptions: {
       globals: {
diff --git a/package-lock.json b/package-lock.json
index fc191f4..834a6c1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,6 +9,7 @@
       "version": "0.4.1",
       "license": "MIT",
       "devDependencies": {
+        "@avalon-vanguard/config": "^1.0.0",
         "@babel/standalone": "^8.0.4",
         "@eslint/js": "^10.0.1",
         "@swc/core": "^1.15.47",
@@ -26,6 +27,38 @@
         "node": ">=20.0.0"
       }
     },
+    "node_modules/@avalon-vanguard/config": {
+      "version": "1.0.0",
+      "resolved": "https://git.avalonvanguard.com/api/packages/avalon-vanguard/npm/%40avalon-vanguard%2Fconfig/-/1.0.0/config-1.0.0.tgz",
+      "integrity": "sha512-ySojd0OONRb9N9KT4CJeyLf5GUrfRP8jxfPTMRv3HUk7gld4VuzZd16lW774SfLkMBMOUYVVf9SKBMO+JATTTA==",
+      "dev": true,
+      "license": "MIT",
+      "peerDependencies": {
+        "@eslint/js": "^10.0.0",
+        "angular-eslint": "^22.0.0",
+        "eslint": "^10.0.0",
+        "prettier": "^3.0.0",
+        "typescript": "^6.0.0",
+        "typescript-eslint": "^8.0.0"
+      },
+      "peerDependenciesMeta": {
+        "@eslint/js": {
+          "optional": true
+        },
+        "angular-eslint": {
+          "optional": true
+        },
+        "eslint": {
+          "optional": true
+        },
+        "prettier": {
+          "optional": true
+        },
+        "typescript-eslint": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/@babel/helper-string-parser": {
       "version": "7.29.7",
       "resolved": "https://registry.npmjs.org/@babel/helper-string-parser/-/helper-string-parser-7.29.7.tgz",
diff --git a/package.json b/package.json
index 56e8884..42f43bf 100644
--- a/package.json
+++ b/package.json
@@ -79,6 +79,7 @@
   },
   "homepage": "https://avalon-vanguard.github.io/cereale/",
   "devDependencies": {
+    "@avalon-vanguard/config": "^1.0.0",
     "@babel/standalone": "^8.0.4",
     "@eslint/js": "^10.0.1",
     "@swc/core": "^1.15.47",
diff --git a/tsconfig.json b/tsconfig.json
index 6d02793..88608be 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,5 +1,9 @@
 {
   // Visit https://aka.ms/tsconfig to read more about this file
+  // Shared (@avalon-vanguard/config/tsconfig/library.json): sourceMap, declaration,
+  // declarationMap, noImplicitReturns, noImplicitOverride, noFallthroughCasesInSwitch,
+  // isolatedModules, skipLibCheck.
+  "extends": "@avalon-vanguard/config/tsconfig/library.json",
   "compilerOptions": {
     // File Layout
     "rootDir": "src",
@@ -11,27 +15,17 @@
     "lib": ["ESNext", "ESNext.Decorators"],
     "types": ["node"],
 
-    // Other Outputs
-    "sourceMap": true,
-    "declaration": true,
-    "declarationMap": true,
-
     // Stricter Typechecking Options
     "noUncheckedIndexedAccess": true,
     "exactOptionalPropertyTypes": true,
 
     // Style Options
-    "noImplicitReturns": true,
-    "noImplicitOverride": true,
     "noUnusedLocals": true,
     "noUnusedParameters": true,
-    "noFallthroughCasesInSwitch": true,
 
     // Recommended Options
     "strict": true,
     "strictPropertyInitialization": false,
-    "isolatedModules": true,
-    "skipLibCheck": true,
 
     // NOTE: no `experimentalDecorators`. v2 uses TC39 standard decorators, which is what
     // gives ClassFieldDecoratorContext<This, Value> and therefore compile-time checking of