diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..444308a
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,25 @@
+name: CI
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Install wasm-pack
+        run: curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh
+
+      - name: Rust tests
+        run: cargo test
+
+      - name: WASM tests (Node)
+        run: wasm-pack test --node
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
new file mode 100644
index 0000000..d9d870f
--- /dev/null
+++ b/.github/workflows/publish.yml
@@ -0,0 +1,36 @@
+name: Publish
+
+on:
+  push:
+    tags: ["v*"]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Install wasm-pack
+        run: cargo install wasm-pack
+
+      - name: Rust tests
+        run: cargo test
+
+      - name: WASM tests (Node)
+        run: wasm-pack test --node
+
+      - name: Build package
+        run: bash build.sh
+
+      - name: Publish to npm
+        run: |
+          echo "//registry.npmjs.org/:_authToken=${{ secrets.NPM_TOKEN }}" > pkg/.npmrc
+          cd pkg
+          npm publish --access public
+        env:
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
index 66fa33c..6cbdb65 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 /target
 pkg/
-.idea/
\ No newline at end of file
+.idea/
+*.ps1
\ No newline at end of file
diff --git a/Cargo.lock b/Cargo.lock
index 277891a..2ff86ce 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -14,6 +14,23 @@ version = "0.7.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7c02d123df017efcdfbd739ef81735b36c5ba83ec3c59c80a9d7ecc718f92e50"
 
+[[package]]
+name = "async-trait"
+version = "0.1.89"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9035ad2d096bed7955a320ee7e2230574d28fd3c3a0f186cbea1ff3c7eed5dbb"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "autocfg"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c08606f8c3cbf4ce6ec8e28fb0014a2c086708fe954eaa885384a6165172e7e8"
+
 [[package]]
 name = "blake3"
 version = "1.8.4"
@@ -29,11 +46,12 @@ dependencies = [
 ]
 
 [[package]]
-name = "blake3-wasm"
-version = "0.0.1"
+name = "blake3-wasm-rs"
+version = "0.1.1"
 dependencies = [
  "blake3",
  "wasm-bindgen",
+ "wasm-bindgen-test",
 ]
 
 [[package]]
@@ -42,6 +60,12 @@ version = "3.20.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5d20789868f4b01b2f2caec9f5c4e0213b41e3e5702a50157d699ae31ced2fcb"
 
+[[package]]
+name = "cast"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37b2a672a2cb129a2e41c10b1224bb368f9f37a2b16b612598138befd7b37eb5"
+
 [[package]]
 name = "cc"
 version = "1.2.60"
@@ -79,18 +103,113 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5baebc0774151f905a1a2cc41989300b1e6fbb29aff0ceffa1064fdd3088d582"
 
+[[package]]
+name = "futures-core"
+version = "0.3.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7e3450815272ef58cec6d564423f6e755e25379b217b0bc688e295ba24df6b1d"
+
+[[package]]
+name = "futures-task"
+version = "0.3.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "037711b3d59c33004d3856fbdc83b99d4ff37a24768fa1be9ce3538a1cde4393"
+
+[[package]]
+name = "futures-util"
+version = "0.3.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "389ca41296e6190b48053de0321d02a77f32f8a5d2461dd38762c0593805c6d6"
+dependencies = [
+ "futures-core",
+ "futures-task",
+ "pin-project-lite",
+ "slab",
+]
+
+[[package]]
+name = "itoa"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f42a60cbdf9a97f5d2305f08a87dc4e09308d1276d28c869c684d7777685682"
+
+[[package]]
+name = "js-sys"
+version = "0.3.95"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2964e92d1d9dc3364cae4d718d93f227e3abb088e747d92e0395bfdedf1c12ca"
+dependencies = [
+ "cfg-if",
+ "futures-util",
+ "once_cell",
+ "wasm-bindgen",
+]
+
 [[package]]
 name = "libc"
 version = "0.2.185"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "52ff2c0fe9bc6cb6b14a0592c2ff4fa9ceb83eea9db979b0487cd054946a2b8f"
 
+[[package]]
+name = "libm"
+version = "0.2.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b6d2cec3eae94f9f509c767b45932f1ada8350c4bdb85af2fcab4a3c14807981"
+
+[[package]]
+name = "memchr"
+version = "2.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8ca58f447f06ed17d5fc4043ce1b10dd205e060fb3ce5b979b8ed8e59ff3f79"
+
+[[package]]
+name = "minicov"
+version = "0.3.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4869b6a491569605d66d3952bcdf03df789e5b536e5f0cf7758a7f08a55ae24d"
+dependencies = [
+ "cc",
+ "walkdir",
+]
+
+[[package]]
+name = "nu-ansi-term"
+version = "0.50.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7957b9740744892f114936ab4a57b3f487491bbeafaf8083688b16841a4240e5"
+dependencies = [
+ "windows-sys",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
+dependencies = [
+ "autocfg",
+ "libm",
+]
+
 [[package]]
 name = "once_cell"
 version = "1.21.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9f7c3e4beb33f85d45ae3e3a1792185706c8e16d043238c593331cc7cd313b50"
 
+[[package]]
+name = "oorandom"
+version = "11.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d6790f58c7ff633d8771f42965289203411a5e5c68388703c06e14f24770b41e"
+
+[[package]]
+name = "pin-project-lite"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a89322df9ebe1c1578d689c92318e070967d1042b512afbe49518723f4e6d5cd"
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.106"
@@ -115,12 +234,70 @@ version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b39cdef0fa800fc44525c84ccb54a029961a8215f9619753635a9c0d2538d46d"
 
+[[package]]
+name = "same-file"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "93fc1dc3aaa9bfed95e02e6eadabb4baf7e3078b0bd1b4d7b6b0b68378900502"
+dependencies = [
+ "winapi-util",
+]
+
+[[package]]
+name = "serde"
+version = "1.0.228"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a8e94ea7f378bd32cbbd37198a4a91436180c5bb472411e48b5ec2e2124ae9e"
+dependencies = [
+ "serde_core",
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_core"
+version = "1.0.228"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "41d385c7d4ca58e59fc732af25c3983b67ac852c1a25000afe1175de458b67ad"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.228"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d540f220d3187173da220f885ab66608367b6574e925011a9353e4badda91d79"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.149"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "83fc039473c5595ace860d8c4fafa220ff474b3fc6bfdb4293327f1a37e94d86"
+dependencies = [
+ "itoa",
+ "memchr",
+ "serde",
+ "serde_core",
+ "zmij",
+]
+
 [[package]]
 name = "shlex"
 version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0fda2ff0d084019ba4d7c6f371c95d8fd75ce3524c3cb8fb653a3023f6323e64"
 
+[[package]]
+name = "slab"
+version = "0.4.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0c790de23124f9ab44544d7ac05d60440adc586479ce501c1d6d7da3cd8c9cf5"
+
 [[package]]
 name = "syn"
 version = "2.0.117"
@@ -138,6 +315,16 @@ version = "1.0.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e6e4313cd5fcd3dad5cafa179702e2b244f760991f45397d14d4ebf38247da75"
 
+[[package]]
+name = "walkdir"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "29790946404f91d9c5d06f9874efddea1dc06c5efe94541a7d6863108e3a5e4b"
+dependencies = [
+ "same-file",
+ "winapi-util",
+]
+
 [[package]]
 name = "wasm-bindgen"
 version = "0.2.118"
@@ -151,6 +338,16 @@ dependencies = [
  "wasm-bindgen-shared",
 ]
 
+[[package]]
+name = "wasm-bindgen-futures"
+version = "0.4.68"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f371d383f2fb139252e0bfac3b81b265689bf45b6874af544ffa4c975ac1ebf8"
+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+]
+
 [[package]]
 name = "wasm-bindgen-macro"
 version = "0.2.118"
@@ -182,3 +379,72 @@ checksum = "5fd04d9e306f1907bd13c6361b5c6bfc7b3b3c095ed3f8a9246390f8dbdee129"
 dependencies = [
  "unicode-ident",
 ]
+
+[[package]]
+name = "wasm-bindgen-test"
+version = "0.3.68"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6bb55e2540ad1c56eec35fd63e2aea15f83b11ce487fd2de9ad11578dfc047ea"
+dependencies = [
+ "async-trait",
+ "cast",
+ "js-sys",
+ "libm",
+ "minicov",
+ "nu-ansi-term",
+ "num-traits",
+ "oorandom",
+ "serde",
+ "serde_json",
+ "wasm-bindgen",
+ "wasm-bindgen-futures",
+ "wasm-bindgen-test-macro",
+ "wasm-bindgen-test-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-test-macro"
+version = "0.3.68"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "caf0ca1bd612b988616bac1ab34c4e4290ef18f7148a1d8b7f31c150080e9295"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "wasm-bindgen-test-shared"
+version = "0.2.118"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "23cda5ecc67248c48d3e705d3e03e00af905769b78b9d2a1678b663b8b9d4472"
+
+[[package]]
+name = "winapi-util"
+version = "0.1.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c2a7b1c03c876122aa43f3020e6c3c3ee5c05081c9a00739faf7503aeba10d22"
+dependencies = [
+ "windows-sys",
+]
+
+[[package]]
+name = "windows-link"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f0805222e57f7521d6a62e36fa9163bc891acd422f971defe97d64e70d0a4fe5"
+
+[[package]]
+name = "windows-sys"
+version = "0.61.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ae137229bcbd6cdf0f7b80a31df61766145077ddf49416a728b02cb3921ff3fc"
+dependencies = [
+ "windows-link",
+]
+
+[[package]]
+name = "zmij"
+version = "1.0.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8848ee67ecc8aedbaf3e4122217aff892639231befc6a1b58d29fff4c2cabaa"
diff --git a/Cargo.toml b/Cargo.toml
index 28935c8..4b3d231 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
-name = "blake3-wasm"
-version = "0.0.1"
+name = "blake3-wasm-rs"
+version = "0.1.1"
 edition = "2024"
 license = "MIT"
 repository = "https://github.com/UneBaguette/blake3.wasm"
@@ -14,3 +14,6 @@ crate-type = ["cdylib"]
 [dependencies]
 blake3 = { version = "1.8.4", features = ["wasm32_simd"] }
 wasm-bindgen = "0.2.118"
+
+[dev-dependencies]
+wasm-bindgen-test = "0.3"
\ No newline at end of file
diff --git a/README.md b/README.md
index a95d8c2..dedf07a 100644
--- a/README.md
+++ b/README.md
@@ -23,8 +23,32 @@ rustflags = ["-C", "target-feature=+simd128"]
 
 ## Usage
 
+```ts
+import * as blake3 from 'blake3-wasm-rs';
+
+const data = new TextEncoder().encode('hello world');
+const key = new Uint8Array(32).fill(1);
+
+// One-shot hashing
+blake3.hash(data);
+blake3.hashXof(data, 64); // variable output length
+
+// MAC and key derivation
+blake3.keyedHash(data, key);
+blake3.deriveKey('my context', key);
+
+// Conctruct for streaming
+const hasher = new blake3.Hasher();
+
+hasher.update(data.slice(0, 5));
+hasher.update(data.slice(5));
+hasher.finalize();
+```
+
+#### OR
+
 ```js
-import { hash, hashXof, keyedHash, deriveKey, Hasher } from './pkg/blake3_wasm.js'
+import { hash, hashXof, keyedHash, deriveKey, Hasher } from 'blake3-wasm-rs'
 
 const data = new TextEncoder().encode('hello world')
 const key = new Uint8Array(32).fill(1)
diff --git a/build.sh b/build.sh
new file mode 100644
index 0000000..064eb5c
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,95 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT="pkg"
+rm -rf "$ROOT"
+
+echo "Building bundler target..."
+wasm-pack build --target bundler -d "$ROOT/bundler"
+
+echo "Building nodejs target..."
+wasm-pack build --target nodejs -d "$ROOT/node"
+
+echo "Building web target..."
+wasm-pack build --target web -d "$ROOT/web"
+
+# Generate node-esm wrapper from the nodejs build exports
+echo "Generating node-esm wrapper..."
+mkdir -p "$ROOT/node-esm"
+
+# Extract export names from the nodejs .js file
+EXPORTS=$(grep -oP '(?<=module\.exports\.)\w+' "$ROOT/node/blake3_wasm_rs.js" | sort -u || true)
+
+# Fallback: parse from .d.ts if module.exports pattern not found
+if [ -z "$EXPORTS" ]; then
+  EXPORTS=$(grep -oP '(?<=export function )\w+' "$ROOT/node/blake3_wasm_rs.d.ts" | sort -u || true)
+fi
+
+# Also check for exported classes
+CLASSES=$(grep -oP '(?<=export class )\w+' "$ROOT/node/blake3_wasm_rs.d.ts" | sort -u || true)
+
+{
+  echo "import { createRequire } from 'module';"
+  echo "const require = createRequire(import.meta.url);"
+  echo "const mod = require('../node/blake3_wasm_rs.js');"
+  echo "export default mod;"
+
+  for name in $EXPORTS; do
+    echo "export const $name = mod.$name;"
+  done
+
+  for name in $CLASSES; do
+    echo "export const $name = mod.$name;"
+  done
+} > "$ROOT/node-esm/index.mjs"
+
+# Clean up wasm-pack generated package.json in each subfolder
+rm -f "$ROOT/bundler/package.json" "$ROOT/node/package.json" "$ROOT/web/package.json"
+rm -f "$ROOT/bundler/.gitignore" "$ROOT/node/.gitignore" "$ROOT/web/.gitignore"
+
+# Generate root package.json
+cat > "$ROOT/package.json" << 'EOF'
+{
+  "name": "blake3-wasm-rs",
+  "version": "0.2.0",
+  "description": "BLAKE3 hashing via Rust/WASM - works in Node.js (CJS + ESM), browsers, and bundlers",
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/UneBaguette/blake3.wasm"
+  },
+  "exports": {
+    ".": {
+      "node": {
+        "require": "./node/blake3_wasm_rs.js",
+        "import": "./node-esm/index.mjs"
+      },
+      "import": "./bundler/blake3_wasm_rs.js",
+      "default": "./web/blake3_wasm_rs.js"
+    }
+  },
+  "types": "./bundler/blake3_wasm_rs.d.ts",
+  "files": [
+    "node/",
+    "node-esm/",
+    "bundler/",
+    "web/"
+  ],
+  "keywords": [
+    "blake3",
+    "wasm",
+    "hash",
+    "cryptography",
+    "wasm-bindgen"
+  ]
+}
+EOF
+
+echo ""
+echo "Done! Package ready in $ROOT/"
+echo "  node (CJS):     $ROOT/node/"
+echo "  node (ESM):     $ROOT/node-esm/"
+echo "  bundler:        $ROOT/bundler/"
+echo "  web:            $ROOT/web/"
+echo ""
+echo "Verify with: cd $ROOT && npm pack --dry-run"
\ No newline at end of file
diff --git a/src/lib.rs b/src/lib.rs
index 23d468c..3522029 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -62,4 +62,85 @@ impl Hasher {
     pub fn reset(&mut self) {
         self.0.reset();
     }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_hash_deterministic() {
+        let a = hash(b"hello");
+        let b = hash(b"hello");
+        assert_eq!(a, b);
+    }
+
+    #[test]
+    fn test_hash_length() {
+        assert_eq!(hash(b"hello").len(), 32);
+    }
+
+    #[test]
+    fn test_hash_xof_length() {
+        assert_eq!(hash_xof(b"hello", 64).len(), 64);
+        assert_eq!(hash_xof(b"hello", 16).len(), 16);
+    }
+
+    #[test]
+    fn test_keyed_hash_valid() {
+        let key = [0u8; 32];
+        assert!(keyed_hash(b"hello", &key).is_ok());
+    }
+
+    #[test]
+    fn test_derive_key() {
+        let a = derive_key("ctx", b"material");
+        let b = derive_key("ctx", b"material");
+        assert_eq!(a, b);
+        assert_eq!(a.len(), 32);
+
+        let c = derive_key("other", b"material");
+        assert_ne!(a, c);
+    }
+
+    #[test]
+    fn test_hasher_streaming() {
+        let oneshot = hash(b"helloworld");
+        let mut h = Hasher::new();
+        h.update(b"hello");
+        h.update(b"world");
+        assert_eq!(h.finalize(), oneshot);
+    }
+
+    #[test]
+    fn test_hasher_reset() {
+        let mut h = Hasher::new();
+        h.update(b"junk");
+        h.reset();
+        h.update(b"hello");
+        assert_eq!(h.finalize(), hash(b"hello"));
+    }
+
+    #[test]
+    fn test_hasher_keyed() {
+        let key = [1u8; 32];
+        let h = Hasher::new_keyed(&key).unwrap();
+        assert_ne!(h.finalize(), hash(b"").as_slice());
+    }
+}
+
+#[cfg(target_arch = "wasm32")]
+mod wasm_tests {
+    use super::*;
+    use wasm_bindgen_test::*;
+
+    #[wasm_bindgen_test]
+    fn test_keyed_hash_bad_key() {
+        assert!(keyed_hash(b"hello", &[0u8; 16]).is_err());
+    }
+
+    #[wasm_bindgen_test]
+    fn test_hasher_keyed_bad_key() {
+        assert!(Hasher::new_keyed(&[0u8; 10]).is_err());
+    }
 }
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