# twilio-cli-core

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This module contains core functionality for the twilio-cli.

## Requirements
Currently, Node 20+ is supported. We support the [LTS versions](https://nodejs.org/en/about/releases) of Node.

## Base commands

### BaseCommand

The base command class for _all_ twilio-cli commands. Includes support for configuration management, logging, and output formatting.

### TwilioClientCommand

A base command class for commands that need a Twilio client to make API requests. Handles loading credentials from the profile configuration.

## Services

### Output formats

Formatters to take a JSON array and write to the stdout. Current formatters include:

- Columns (default, human readable)
- JSON (raw API output)
- TSV

### CliRequestClient

A custom http client for the Twilio helper library to allow us to log API requests as well as modify the User-Agent header.

### Usage with proxy
 - `HTTP_PROXY`: If using Twilio CLI behind a proxy, set the URL of the proxy in an environment variable called `HTTP_PROXY`.
   

### Config

Manages the CLI configuration options, such as Twilio profiles and credentials.

### Logger

Standardizes logging output of debug, info, warning, and error messages to stderr (all go to stderr to allow differentiation between command output and logging messages).