Pre-requisites:

You will need to download and install npm and git.

Installing the SDK:

Open a terminal and navigate to the directory you wish to install the SDK, then type the following commands:
git clone https://github.com/hylian-modding/ModLoader64.git
cd ModLoader64
npm install -g yarn typescript gulp-cli
yarn
yarn link


To check that ModLoader64 has installed properly:
cd ..
modloader64 -h

Starting a new mod:

To start a new plugin navigate to the working directory in a command prompt and run the following commands (DO NOT CREATE MODS IN THE MODLOADER64 FOLDER):
modloader64 --init
modloader64 --install https://github.com/hylian-modding/oot_plugin_template.git
modloader64 --template oot_plugin_template

This will setup the initial framework and link the SDK to your working directory.
Navigate to ./src/mod name here/ and rename oot_plugin_template.ts to Main.ts.
Open ./src/plugin/package.json and change the value of "main" from index.js to Main.js.
Open Main.ts and change class and module.exports to Main.
Start coding and have fun!

Building and Testing your mod:

Once you have finished writing you mod and wish to build and test it, navigate a command prompt to your working directory and run the following:
modloader64 -br (Builds and runs the code in a test environment)
modloader64 -br2 (builds and runs a second instance of your mod for multiplayer testing)
modloader64 -bd (Builds and makes a .pak file for distribution)

Help:

The following is a list of options available to ModLoader64 SDK:
-n, --init init new project
-b, --build build mod
-r, --run run mod
-d, --dist pack mod
-2, --runp2 run p2
-u, --update update
-q, --bumpversion bump version number
-i, --install <url> install dependency
-s, --setroms <path> set rom directory
-c, --clean cleans build dirs
-a, --modulealias <alias> alias a module path
-p, --modulealiaspath <path> alias a module path
-z, --rebuildsdk rebuild sdk
-t, --template <template> make project from template
-w, --window gui window
-h, --help output usage information