### Install parallelshell (Global)

Source: https://github.com/darkguy2008/parallelshell/blob/master/README.md

Install parallelshell globally on your system.

```bash
npm i -g parallelshell
```

--------------------------------

### Install parallelshell (Development)

Source: https://github.com/darkguy2008/parallelshell/blob/master/README.md

Install parallelshell as a development dependency in your project.

```bash
npm i --save-dev parallelshell
```

--------------------------------

### Install Parallel Shell via npm

Source: https://context7.com/darkguy2008/parallelshell/llms.txt

Install Parallel Shell as a development dependency or globally for command-line usage.

```bash
npm install --save-dev parallelshell
```

```bash
npm install -g parallelshell
```

--------------------------------

### Verbose Logging Mode

Source: https://context7.com/darkguy2008/parallelshell/llms.txt

Enable verbose output to see detailed status of each process, including when processes start, end, or fail.

```bash
parallelshell -v "echo task1" "echo task2"
```

--------------------------------

### Display Help Information

Source: https://context7.com/darkguy2008/parallelshell/llms.txt

Show all available command-line options and usage information.

```bash
parallelshell --help
```

--------------------------------

### Use in npm Scripts

Source: https://context7.com/darkguy2008/parallelshell/llms.txt

Configure parallel commands directly in your package.json for development workflows.

```json
{
  "scripts": {
    "dev": "parallelshell \"npm run watch:css\" \"npm run watch:js\" \"npm run server\"",
    "test:watch": "parallelshell \"npm run lint:watch\" \"npm run test:unit:watch\"",
    "build:all": "parallelshell -v \"npm run build:client\" \"npm run build:server\""
  }
}
```

--------------------------------

### Run Development Watchers Concurrently

Source: https://context7.com/darkguy2008/parallelshell/llms.txt

A common use case is running multiple development tools simultaneously, such as a build watcher and a test watcher.

```bash
parallelshell "npm run watch:build" "npm run watch:test"
```

```bash
parallelshell "npm run server" "npm run sass:watch" "npm run typescript:watch"
```

--------------------------------

### Windows Compatibility

Source: https://context7.com/darkguy2008/parallelshell/llms.txt

On Windows, use double quotes to properly escape command arguments. Parallel Shell automatically uses `cmd /c` on Windows instead of `sh -c`.

```bash
parallelshell "echo hello" "echo world"
```

```bash
parallelshell "node -e \"console.log('task 1')\"" "node -e \"console.log('task 2')\""
```

--------------------------------

### Execute Commands in Parallel

Source: https://github.com/darkguy2008/parallelshell/blob/master/README.md

Run multiple shell commands concurrently using parallelshell. All commands share stdout/stderr, and the first non-zero exit code stops the rest.

```bash
parallelshell "echo 1" "echo 2" "echo 3"
```

--------------------------------

### Wait Mode - Continue After Child Errors

Source: https://context7.com/darkguy2008/parallelshell/llms.txt

By default, when one process fails, all sibling processes are terminated. Use the `-w` or `--wait` flag to allow sibling processes to continue running even if one fails.

```bash
parallelshell "exit 1" "sleep 10"
```

```bash
parallelshell --wait "exit 1" "echo 'still running'" "sleep 2"
```

--------------------------------

### Handle Process Exit Codes

Source: https://context7.com/darkguy2008/parallelshell/llms.txt

Parallel Shell exits with the first non-zero exit code encountered, making it suitable for CI/CD pipelines where failure detection is critical.

```bash
parallelshell "node -e 'process.exit(1)'" "sleep 100"
echo $?
```

```bash
parallelshell -v "node -e 'throw new Error()"' "echo success"
```

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