first try

.gitignore

@@ -1 +1,2 @@
 node_modules
+build

build.config.ts

@@ -0,0 +1,9 @@
+import { defineBuildConfig } from "unbuild";
+
+export default defineBuildConfig({
+	entries: ["./src/index"],
+	outDir: "build",
+	rollup: {
+		inlineDependencies: true,
+	},
+});

package.json

@@ -2,8 +2,13 @@
 	"name": "setup-age-sops",
 	"description": "Setup AGE and SOPS in Gitea Actions",
 	"scripts": {
+		"build": "unbuild",
 		"prepackage": "npm run build",
-		"package": "ncc build src/index.ts -o dist"
+		"package": "ncc build build/index.mjs -o dist",
+		"format": "biome format --write .",
+		"lint": "biome check --apply-unsafe .",
+		"check": "biome check . --apply-unsafe",
+		"postinstall": "lefthook install"
 	},
 	"keywords": [
 		"age",
@@ -21,13 +26,16 @@
 		"ts-dedent": "^2.2.0"
 	},
 	"devDependencies": {
+		"@biomejs/biome": "^2.0.5",
 		"@hedger/prettier-config": "^1.2.0",
 		"@octokit/auth-action": "^6.0.1",
 		"@octokit/request-error": "^7.0.0",
 		"@octokit/rest": "^22.0.0",
 		"@octokit/types": "^14.1.0",
 		"@types/node": "^18.19.31",
-		"@vercel/ncc": "^0.38.3"
+		"@vercel/ncc": "^0.38.3",
+		"lefthook": "^1.11.14",
+		"unbuild": "^3.5.0"
 	},
 	"packageManager": "pnpm@8.3.1"
 }