pm-get install <package> : install the package
pm-get uninstall <package> [--autoremove] [--purge] : uninstall the package. Optionally remove configurations files and/or old dependance no longer needed
pm-get autoremove : remove no longer required dependance.
pm-get update : update the local package cache
pm-get upgrade : apply all upgrades possible"
pm-get sources list : list configured source repository
pm-get sources add <url> : add a source repository url to /etc/pm/sources.list.d/custom.list
pm-get list : list available packages
pm-get info <package> : get the infos about the package

Files :

/etc/pm/sources.list : the main repository list
/etc/pm/sources.list.d/*.list : additional repository lists
/etc/pm/autoInstalled : list dependance installed automatically

Repository :

A repository is a collection of packages and a manifest file for the repository, accessible via http or https.

File structure :

The repository owner if free to structure it however they want. The only restriction is that the manifest file manifest is placed in the repository's root folder.

Manifest file :

The manifest file is a aggregation of the packages's manifest files in a table. Inside each package's manifest is added a extra field that point to the package file. See manifest for a example.
Example :

{
    ["pm_get"] = {
		["manifestVersion"] = "1.0",
		["package"] = "pm_get",
		["version"] = "1.2.0",
		["name"] = "pm get",
		["repo"] = "tree/master/pm",
		["description"] = "Download and install package for pm",
		["authors"] = "AR2000AR",
		["dependencies"] = 	{
			["pm"] = "oppm"
		},
		["configFiles"] = 	{
			"/etc/pm/sources.list"
		},
		["archiveName"] = "pm_get.tar"
	}
}