Dev update.

Author: electricessence

package.json

@@ -43,9 +43,10 @@
     "build:types": "cpy \"src/**/*.d.ts\" dist/types --parents && tsc -p tsconfig.types.json",
     "build:esm": "rollup -c rollup.config.js",
     "build:cjs": "tsc -p tsconfig.cjs.json",
-    "build": "pnpm clean && pnpm build:types && pnpm build:esm && pnpm build:cjs",
+    "build": "pnpm clean && pnpm build:types && pnpm build:esm && pnpm build:cjs && pnpm typecheck:tests",
     "test": "vitest run",
     "typecheck": "tsc --noEmit",
+    "typecheck:tests": "tsc -p tests/tsconfig.json --noEmit",
     "lint": "eslint src/**/*.ts",
     "docs": "rimraf docs && typedoc --options typedoc.json --readme none",
     "bump": "pnpm run precommit && pnpm version patch",
@@ -66,6 +67,7 @@
     "@eslint/js": "^9.34.0",
     "@rollup/plugin-typescript": "^12.1.4",
     "@types/node": "^24.3.0",
+    "@vitest/coverage-v8": "^3.2.4",
     "cpy-cli": "^6.0.0",
     "eslint": "^9.34.0",
     "rimraf": "^6.0.1",