feat: support multiple Node.js versions

.github/workflows/test.yml

@@ -21,18 +21,30 @@ jobs:
   test:
     runs-on: ubuntu-latest
     timeout-minutes: 20
+    strategy:
+      fail-fast: false
+      matrix:
+        node-version:
+          - "14.18.0"
+          - "16.20.2"
+          - "18.0.0"
+          - "25.2.1"
     steps:
       - name: Action | Checkout Repository Code
         uses: actions/checkout@v6
 
       - name: Setup | Configure Node.js
         uses: actions/setup-node@v6
         with:
-          node-version: "25"
+          node-version: ${{ matrix.node-version }}
           cache: "npm"
 
       - name: Setup | Install Dependencies
         run: npm ci
 
-      - name: Evaluate | Run Tests
+      - name: Evaluate | Run Compatibility Suite
+        run: npm run test:compatibility
+
+      - name: Evaluate | Run Coverage Suite
+        if: ${{ matrix.node-version == '25.2.1' }}
         run: npm run test:coverage -- --ci --runInBand --verbose

.npmrc

@@ -1,3 +1,3 @@
-engine-strict=true
+engine-strict=false
 access=public
 registry=https://registry.npmjs.org/

.nvmrc

@@ -1 +1 @@
-25.2.1
+14.18.0

CONTRIBUTING.md

@@ -10,7 +10,8 @@ This repository has enabled GitHub Copilot and any other compatible A.I. code as
 
 Required software for development and CI:
 
-- [Node.js](https://nodejs.org/): `>= 25.2.1`
+- [Node.js](https://nodejs.org/): `>= 14.18.0`
+- [NPM](https://www.npmjs.com/): `>= 6.14.15`
 - [LLVM Clang](https://clang.llvm.org/): `>= 22.1.1`
 - [LLVM LLD](https://lld.llvm.org/): `>= 22.1.1`
 
@@ -52,20 +53,24 @@ This repository follows a simple [GitHub Flow](https://docs.github.com/en/get-st
 
 [NPM scripts](./package.json) are organized with [ESLint Package.json Conventions](https://eslint.org/docs/latest/contribute/package-json-conventions):
 
-| Command             | Purpose                                                         |
-| ------------------- | --------------------------------------------------------------- |
-| `build`             | Build WASM binaries, TypeScript output, and WASM assets.        |
-| `build:clean`       | Remove generated build directories.                             |
-| `build:typescript`  | Compile TypeScript and rewrite path aliases.                    |
-| `build:wasm`        | Compile algorithm `main.c` files to `main.wasm` when available. |
-| `build:wasm-assets` | Copy generated WASM binaries to build output tree.              |
-| `build:wasm:check`  | Validate WASM artifacts and execute WASM smoke checks.          |
-| `build:wasm:strict` | Compile WASM and fail when WASM compilation is unavailable.     |
-| `release`           | Run semantic-release for tags, GitHub release, and npm publish. |
-| `start`             | Run CLI directly from TypeScript sources.                       |
-| `start:compiled`    | Run CLI from compiled build output.                             |
-| `test`              | Run Jest test suite with default config.                        |
-| `test:coverage`     | Run Jest with coverage output for CI and release validation.    |
+| Command              | Purpose                                                                |
+| -------------------- | ---------------------------------------------------------------------- |
+| `build`              | Build WASM binaries, TypeScript output, and WASM assets.               |
+| `build:clean`        | Remove generated build directories.                                    |
+| `build:typescript`   | Compile TypeScript and rewrite path aliases.                           |
+| `build:wasm`         | Compile algorithm `main.c` files to `main.wasm` when available.        |
+| `build:wasm-assets`  | Copy generated WASM binaries to build output tree.                     |
+| `build:wasm:check`   | Validate WASM artifacts and execute WASM smoke checks.                 |
+| `build:wasm:strict`  | Compile WASM and fail when WASM compilation is unavailable.            |
+| `release`            | Run semantic-release for tags, GitHub release, and npm publish.        |
+| `start`              | Run CLI directly from TypeScript sources.                              |
+| `start:compiled`     | Run CLI from compiled build output.                                    |
+| `test`               | Run the default test suite by chaining test subcommands.               |
+| `test:cli`           | Run the CLI smoke suite across all algorithms and demos.               |
+| `test:cli:compiled`  | Build the project and run the CLI smoke suite against compiled output. |
+| `test:compatibility` | Build the project and run the default test suite.                      |
+| `test:coverage`      | Run the Jest unit test suite with coverage output.                     |
+| `test:unit`          | Run the Jest unit test suite without coverage.                         |
 
 ## WebAssembly Behavior
 

README.md

@@ -39,7 +39,15 @@ npm install @siegesailor/cryptography
 
 Required software for this module:
 
-- [Node.js](https://nodejs.org/): `>= 25.2.1`
+- [Node.js](https://nodejs.org/): `>= 14.18.0`
+- [NPM](https://www.npmjs.com/): `>= 6.14.15`
+
+Tested and compatible Node.js versions:
+
+- `14.18.0`
+- `16.20.2`
+- `18.0.0`
+- `25.2.1`
 
 ## Use as a Library