diff --git a/.gitignore b/.gitignore
index f39fcb6..7f82a6f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,6 @@
-.idea/
-._*
-.DS_Store
-bun.lockb
 package-lock.json
+._*
+.idea/
+.DS_Store
 node_modules/
+dist/
diff --git a/.npmignore b/.npmignore
new file mode 100644
index 0000000..aa0e10b
--- /dev/null
+++ b/.npmignore
@@ -0,0 +1,7 @@
+.woodpecker/
+test/
+.gitignore
+README.md
+.prettierignore
+.prettierrc
+eslint.config.ts
diff --git a/.prettierignore b/.prettierignore
new file mode 100644
index 0000000..84af45f
--- /dev/null
+++ b/.prettierignore
@@ -0,0 +1,3 @@
+.woodpecker
+node_modules
+dist
diff --git a/.prettierrc b/.prettierrc
new file mode 100644
index 0000000..9e19544
--- /dev/null
+++ b/.prettierrc
@@ -0,0 +1,11 @@
+{
+  "arrowParens": "avoid",
+  "tabWidth": 2,
+  "useTabs": false,
+  "bracketSpacing": false,
+  "printWidth": 120,
+  "semi": false,
+  "singleQuote": true,
+  "jsxSingleQuote": true,
+  "trailingComma": "none"
+}
diff --git a/.woodpecker/test.yml b/.woodpecker/test.yml
index 5eae361..3288aaa 100644
--- a/.woodpecker/test.yml
+++ b/.woodpecker/test.yml
@@ -1,6 +1,6 @@
 when:
   - path:
-      include: ['index.ts']
+      include: ['**/*.{js,jsx,ts,tsx}']
 
 steps:
   install:
@@ -10,10 +10,42 @@ steps:
     commands:
       - npm install
 
-  test:
-    image: oven/bun
+  typecheck:
+    image: node
     when:
       - event: [pull_request, push, manual]
     depends_on: install
     commands:
-      - bun test
+      - npm run typecheck
+
+  lint:
+    image: node
+    when:
+      - event: [pull_request, push, manual]
+    depends_on: install
+    commands:
+      - npm run lint
+
+  fmt:
+    image: node
+    when:
+      - event: [pull_request, push, manual]
+    depends_on: install
+    commands:
+      - npm run check:fmt
+
+  test:
+    image: node
+    when:
+      - event: [pull_request, push, manual]
+    depends_on: install
+    commands:
+      - npm run test
+
+  check:
+    image: node
+    when:
+      - event: [pull_request, push, manual]
+    depends_on: install
+    commands:
+      - npm run check
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..3e620d1
--- /dev/null
+++ b/README.md
@@ -0,0 +1,4 @@
+# Miscellaneous
+Various helpers I often use in TypeScript but that are impossible to categorize.
+
+In fact, it is just two functions about base64 and number arrays.
diff --git a/eslint.config.ts b/eslint.config.ts
new file mode 100644
index 0000000..754d790
--- /dev/null
+++ b/eslint.config.ts
@@ -0,0 +1,15 @@
+import js from '@eslint/js'
+import globals from 'globals'
+import tseslint from 'typescript-eslint'
+import {defineConfig, globalIgnores} from 'eslint/config'
+
+export default defineConfig([
+  tseslint.configs.recommended,
+  {
+    files: ['**/*.{js,mjs,cjs,ts,mts,cts,jsx,tsx}'],
+    plugins: {js},
+    extends: ['js/recommended'],
+    languageOptions: {globals: {...globals.browser, ...globals.node}}
+  },
+  globalIgnores(['dist'])
+])
diff --git a/package.json b/package.json
index 61c4046..78230ae 100644
--- a/package.json
+++ b/package.json
@@ -5,17 +5,32 @@
   "author": "Pascal Perrenoud <pascal@pband.ch>",
 
   "scripts": {
-    "test": "bun test"
+    "check": "clear ; npm run typecheck && npm run lint && npm run check:fmt && npm run test ; clear && echo 'OK'",
+    "check:fmt": "npx prettier -c **/*.{js,jsx,ts,tsx}",
+    "fmt": "prettier --write **/*.{js,jsx,ts,tsx}",
+    "lint": "eslint **/*.{js,jsx,ts,tsx}",
+    "test": "bun test",
+    "typecheck": "tsc --noEmit"
   },
 
   "dependencies": {
-    "log": "git+https://git.pband.ch/typescript/log.git"
+    "log": "git+ssh://git@git.pband.ch:typescript/log.git#main"
   },
   "devDependencies": {
-    "@types/bun": "^1.0.11"
+    "@eslint/js": "^9.35.0",
+    "@types/bun": "^1.2.21",
+    "bun": "^1.2.21",
+    "eslint": "^9.35.0",
+    "globals": "^16.4.0",
+    "jiti": "^2.5.1",
+    "prettier": "^3.6.2",
+    "typescript": "^5.9.2",
+    "typescript-eslint": "^8.43.0"
   },
 
-  "module": "index.ts",
   "type": "module",
-  "files": ["index.ts"]
+  "main": "./src/index.ts",
+  "exports": {
+    ".": "./src/index.ts"
+  }
 }
diff --git a/index.ts b/src/index.ts
similarity index 90%
rename from index.ts
rename to src/index.ts
index 7b572a9..f4e9051 100644
--- a/index.ts
+++ b/src/index.ts
@@ -3,8 +3,7 @@ import logger from 'log'
 const log = logger('misc')
 
 export function a2str(buf: Uint8Array) : string {
-    // @ts-ignore
-    return String.fromCharCode.apply(null, buf)
+  return String.fromCharCode.apply(null, [...buf])
 }
 export function str2a(str: string) : Uint8Array {
     const buf = new Uint8Array(str.length)
diff --git a/index.test.ts b/test/main.test.ts
similarity index 91%
rename from index.test.ts
rename to test/main.test.ts
index 63668a8..3cbab64 100644
--- a/index.test.ts
+++ b/test/main.test.ts
@@ -1,4 +1,4 @@
-import {a2b64, a2str, b642a, str2a} from './index'
+import {a2b64, a2str, b642a, str2a} from '..'
 
 import {test, expect} from 'bun:test'
 
diff --git a/tsconfig.json b/tsconfig.json
index 3d49bf0..5dc8e0f 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,32 +1,14 @@
 {
   "compilerOptions": {
-    // Enable latest features
-    "lib": ["ESNext","dom"],
-    "target": "ESNext",
+    "target": "ES2020",
     "module": "ESNext",
-    "moduleDetection": "force",
-    "allowJs": true,
-    "checkJs": true,
-
-    // Bundler mode
-    "moduleResolution": "bundler",
-    "allowImportingTsExtensions": true,
-    "verbatimModuleSyntax": true,
-    "noEmit": true,
-
-    // Best practices
+    "moduleResolution": "node",
+    "declaration": true,
+    "outDir": "dist",
+    "rootDir": "./src",
     "strict": true,
-    "skipLibCheck": true,
-    "noFallthroughCasesInSwitch": true,
-
-    // Some stricter flags (disabled by default)
-    "noUnusedLocals": false,
-    "noUnusedParameters": false,
-    "forceConsistentCasingInFileNames": true,
-    "noPropertyAccessFromIndexSignature": false
+    "esModuleInterop": true,
+    "skipLibCheck": true
   },
-  
-  "include": [
-    "index.ts",
-  ]
+  "include": ["src"]
 }