Add badge

Author: carry0987

README.md

@@ -1,5 +1,6 @@
 # hashbuf
-[![CI](https://github.com/carry0987/hashbuf/actions/workflows/ci.yml/badge.svg)](https://github.com/carry0987/hashbuf/actions/workflows/ci.yml)  
+[![CI](https://github.com/carry0987/hashbuf/actions/workflows/ci.yml/badge.svg)](https://github.com/carry0987/hashbuf/actions/workflows/ci.yml)
+
 High-performance hash functions for JavaScript/TypeScript, powered by Rust and WebAssembly.
 
 ## Features
@@ -14,11 +15,11 @@ High-performance hash functions for JavaScript/TypeScript, powered by Rust and W
 
 ## Packages
 
-| Package | Description |
-|---------|-------------|
-| [`@hashbuf/blake3`](./packages/blake3) | BLAKE3 hash, double hash, keyed MAC, streaming |
-| [`@hashbuf/sha256`](./packages/sha256) | SHA-256 hash, double hash, HMAC-SHA256, streaming |
-| [`@hashbuf/types`](./packages/types) | Shared `Hasher` and `HashAlgorithm` interfaces |
+| Package | NPM | Description |
+|---------|-----|-------------|
+| [`@hashbuf/blake3`](./packages/blake3) | [![NPM](https://img.shields.io/npm/v/@hashbuf/blake3.svg)](https://www.npmjs.com/package/@hashbuf/blake3) | BLAKE3 hash, double hash, keyed MAC, streaming |
+| [`@hashbuf/sha256`](./packages/sha256) | [![NPM](https://img.shields.io/npm/v/@hashbuf/sha256.svg)](https://www.npmjs.com/package/@hashbuf/sha256) | SHA-256 hash, double hash, HMAC-SHA256, streaming |
+| [`@hashbuf/types`](./packages/types) | [![NPM](https://img.shields.io/npm/v/@hashbuf/types.svg)](https://www.npmjs.com/package/@hashbuf/types) | Shared `Hasher` and `HashAlgorithm` interfaces |
 
 ## Quick Start
 

packages/blake3/README.md

@@ -1,5 +1,7 @@
 # @hashbuf/blake3
 
+[![NPM](https://img.shields.io/npm/v/@hashbuf/blake3.svg)](https://www.npmjs.com/package/@hashbuf/blake3)
+
 BLAKE3 cryptographic hash function powered by Rust/WASM. Supports one-shot hashing, double hashing, keyed MAC, and incremental streaming.
 
 ## Install

packages/sha256/README.md

@@ -1,5 +1,7 @@
 # @hashbuf/sha256
 
+[![NPM](https://img.shields.io/npm/v/@hashbuf/sha256.svg)](https://www.npmjs.com/package/@hashbuf/sha256)
+
 SHA-256 cryptographic hash function and HMAC-SHA256 powered by Rust/WASM. Supports one-shot hashing, double hashing, HMAC, and incremental streaming.
 
 ## Install

packages/types/README.md

@@ -1,5 +1,7 @@
 # @hashbuf/types
 
+[![NPM](https://img.shields.io/npm/v/@hashbuf/types.svg)](https://www.npmjs.com/package/@hashbuf/types)
+
 Shared type definitions for hashbuf packages.
 
 ## Install