-- I went searching through the GitHub and this is all the things I would assume you need.

-- Skeleton class file:
CLASS.name = "Name"
CLASS.description = "Class description"
CLASS.faction = FACTION_UNKNOWN
CLASS.income = 500
CLASS.isDefault = true
CLASS.weapons = { "weapon_fists" }

function CLASS:CanSwitchTo( client )
    return true -- True means the client can switch to this class, false if not.
end

function CLASS:OnSet( client )
    -- This function gets called when the "client" switches to this class.
end

function CLASS:OnSpawn( client )
    -- This is called upon the player spawning in with this class.
end

CLASS_UNIQUE_NAME = CLASS.index







-- Skeleton faction file:
FACTION.name = "Faction Name"
FACTION.description = "Faction description"
FACTION.income = 500
FACTION.isDefault = true
FACTION.color = Color( 40, 40, 155 )
FACTION.isGloballyRecognized = false -- True if everyone knows this faction's players names.
FACTION.models = {
    "models/player/zelpa/male_02.mdl",
    "models/player/zelpa/male_01.mdl",
}

function FACTION:OnCharacterCreated( client, character )
    -- This is called when a character is created with this faction.
end

FACTION_UNIQUE_NAME = FACTION.index