chore: adopt shared config packages (tsconfig, eslint, prettier)

.prettierrc

@@ -1 +0,0 @@
-{}

eslint.config.js

@@ -1,10 +1,16 @@
-import eslint from "@eslint/js";
-import tseslint from "typescript-eslint";
+import tsParser from '@typescript-eslint/parser';
+import tsPlugin from '@typescript-eslint/eslint-plugin';
+import eslintConfigPrettier from 'eslint-config-prettier';
+import { typescript } from '@acamarata/eslint-config';
 
-export default tseslint.config(
-  eslint.configs.recommended,
-  ...tseslint.configs.recommended,
+export default [
   {
-    ignores: ["dist/", "*.cjs"],
+    plugins: { '@typescript-eslint': tsPlugin },
+    languageOptions: { parser: tsParser },
   },
-);
+  ...typescript,
+  eslintConfigPrettier,
+  {
+    ignores: ['dist/', 'node_modules/', '*.cjs'],
+  },
+];

package.json

@@ -69,6 +69,9 @@
     "registry": "https://registry.npmjs.org/"
   },
   "devDependencies": {
+    "@acamarata/eslint-config": "^0.1.0",
+    "@acamarata/prettier-config": "^0.1.0",
+    "@acamarata/tsconfig": "^0.1.0",
     "@eslint/js": "^9.27.0",
     "@types/node": "^22.15.3",
     "eslint": "^9.27.0",
@@ -78,5 +81,6 @@
     "typescript-eslint": "^8.32.1"
   },
   "type": "module",
-  "packageManager": "pnpm@10.11.1"
+  "packageManager": "pnpm@10.11.1",
+  "prettier": "@acamarata/prettier-config"
 }

src/index.ts

@@ -60,7 +60,9 @@ export function qiblaAngle(lat: number, lng: number): number {
  * @returns Two-letter compass abbreviation (N, NE, E, SE, S, SW, W, NW).
  */
 export function compassDir(bearing: number): CompassAbbr {
-  return COMPASS_ABBR[Math.round(bearing / 45) % 8];
+  // Non-null assertion: index is always 0-7 (Math.round(bearing/45) % 8), which is within COMPASS_ABBR bounds.
+  // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+  return COMPASS_ABBR[Math.round(bearing / 45) % 8]!;
 }
 
 /**
@@ -70,7 +72,9 @@ export function compassDir(bearing: number): CompassAbbr {
  * @returns Full direction name (North, Northeast, etc.).
  */
 export function compassName(bearing: number): CompassName {
-  return COMPASS_NAMES[Math.round(bearing / 45) % 8];
+  // Non-null assertion: index is always 0-7 (Math.round(bearing/45) % 8), which is within COMPASS_NAMES bounds.
+  // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+  return COMPASS_NAMES[Math.round(bearing / 45) % 8]!;
 }
 
 /**

tsconfig.json

@@ -1,16 +1,9 @@
 {
+  "extends": "@acamarata/tsconfig/tsconfig.library.json",
   "compilerOptions": {
-    "target": "ES2020",
-    "module": "ESNext",
-    "moduleResolution": "bundler",
-    "strict": true,
     "noImplicitReturns": true,
     "noFallthroughCasesInSwitch": true,
     "esModuleInterop": true,
-    "declaration": true,
-    "declarationMap": true,
-    "sourceMap": true,
-    "outDir": "dist",
     "rootDir": "src",
     "types": ["node"]
   },