diff --git a/.editorconfig b/.editorconfig
index f166060..0ae9cb6 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -1,4 +1,6 @@
 # Editor configuration, see https://editorconfig.org
+# Source: @avalon-vanguard/config. EditorConfig cannot extend a file, so each repo commits a copy:
+#   cp node_modules/@avalon-vanguard/config/.editorconfig .editorconfig
 root = true
 
 [*]
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/.prettierrc b/.prettierrc
index d6c16d7..c27a4e7 100644
--- a/.prettierrc
+++ b/.prettierrc
@@ -1,12 +1 @@
-{
-  "printWidth": 100,
-  "singleQuote": true,
-  "overrides": [
-    {
-      "files": "*.html",
-      "options": {
-        "parser": "angular"
-      }
-    }
-  ]
-}
+"@avalon-vanguard/config/prettier/angular"
diff --git a/package-lock.json b/package-lock.json
index 154767b..5081f97 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -22,6 +22,7 @@
         "@angular/build": "^22.0.6",
         "@angular/cli": "^22.0.6",
         "@angular/compiler-cli": "^22.0.0",
+        "@avalon-vanguard/config": "^1.0.0",
         "@playwright/test": "^1.61.1",
         "@tailwindcss/postcss": "^4.3.2",
         "@types/node": "^26.1.1",
@@ -1149,6 +1150,38 @@
       "dev": true,
       "license": "MIT"
     },
+    "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-annotate-as-pure": {
       "version": "8.0.0",
       "resolved": "https://registry.npmjs.org/@babel/helper-annotate-as-pure/-/helper-annotate-as-pure-8.0.0.tgz",
diff --git a/package.json b/package.json
index 6f6cc1d..35c5b02 100644
--- a/package.json
+++ b/package.json
@@ -33,6 +33,7 @@
     "@angular/build": "^22.0.6",
     "@angular/cli": "^22.0.6",
     "@angular/compiler-cli": "^22.0.0",
+    "@avalon-vanguard/config": "^1.0.0",
     "@playwright/test": "^1.61.1",
     "@tailwindcss/postcss": "^4.3.2",
     "@types/node": "^26.1.1",
diff --git a/tsconfig.json b/tsconfig.json
index 7516612..80d7992 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,24 +1,9 @@
 /* To learn more about Typescript configuration file: https://www.typescriptlang.org/docs/handbook/tsconfig-json.html. */
 /* To learn more about Angular compiler options: https://angular.dev/reference/configs/angular-compiler-options. */
+/* Compiler and Angular options come from @avalon-vanguard/config (tsconfig/angular.json). */
 {
+  "extends": "@avalon-vanguard/config/tsconfig/angular.json",
   "compileOnSave": false,
-  "compilerOptions": {
-    "noImplicitOverride": true,
-    "noPropertyAccessFromIndexSignature": true,
-    "noImplicitReturns": true,
-    "noFallthroughCasesInSwitch": true,
-    "skipLibCheck": true,
-    "isolatedModules": true,
-    "experimentalDecorators": true,
-    "importHelpers": true,
-    "target": "ES2022",
-    "module": "preserve"
-  },
-  "angularCompilerOptions": {
-    "enableI18nLegacyMessageIdFormat": false,
-    "strictInjectionParameters": true,
-    "strictInputAccessModifiers": true
-  },
   "files": [],
   "references": [
     {