Strict TypeScript ESLint Configuration

eslint.config.ts

@@ -0,0 +1,18 @@
+import eslint from "@eslint/js";
+import { globalIgnores } from "eslint/config";
+import tseslint from "typescript-eslint";
+
+export default tseslint.config(
+  globalIgnores(["dist"]),
+  eslint.configs.recommended,
+  tseslint.configs.strictTypeChecked,
+  tseslint.configs.stylisticTypeChecked,
+  {
+    languageOptions: {
+      parserOptions: {
+        projectService: true,
+        tsconfigRootDir: import.meta.dirname,
+      },
+    },
+  },
+);

package.json

@@ -35,6 +35,7 @@
     "@types/node": "^22.15.30",
     "@vitest/coverage-v8": "^3.2.0",
     "eslint": "^9.28.0",
+    "jiti": "^2.4.2",
     "lefthook": "^1.11.13",
     "prettier": "^3.5.3",
     "typescript": "^5.8.3",

src/bin.ts

@@ -8,7 +8,7 @@ program
   .version("0.0.0")
   .description("Generate a Fibonacci sequence up to the given number of terms.")
   .argument("<n>", "The number of terms", parseInt)
-  .action((n) => {
+  .action((n: number) => {
     const sequence = fibonacciSequence(n);
     process.stdout.write(`${sequence.join(" ")}\n`);
   })