api-reference.txt

This might not be updated, but it should give a quick reference of the available interfaces.

squadId: Either a _meta.registeredSquadIds entry (string), or a player index (number).
Player-indexed squads behave differently in many ways.

If you dont pass forcefullyCreate, you might get nil back if the given squadId doesnt exist.
local squad = _G.GetSquad(string: LuaForce.name, squadId, boolean: forceCreateSquad)

Orders might not always be forcefully reapplied, unless you specify force.
squad:Order(factorioCommandTable, boolean: force)
squad:Get(_meta.settings.*)
squad:Set(_meta.settings.*, value)
squad:Validate() - always done before task processing
squad:IsGathered()
squad:IsFull()
squad:Destroy()
squad:Transfer(to: squadId)
squad:GetPosition() - current squad position,
squad.position - this is where the squads current task wants the squad to end up
squad:GetSurface()
local added = squad + LuaEntity
if not added then print("wtf") end
#squad, number of members in the squad
squad(3), returns member at index 3
for i = 1, #squad do
	if squad(i).valid then ... end
end
squad.taskData - tasks use this to save any data they want, nil'd if a squad re-tasks
squad.home - assembler

InitializeGUI(player)
UpdateCommandFrame(player, squadId, refresh)
UpdateSquadButtons(player, squadId), if squadid is nil, all buttons are updated

SelectSquad(squad, player), removes all stickers the player has applied previously
DeselectSquads(player), removes all stickers the player has applied previously
RemoveSquadStickers(squad), removes all stickers from this squad

tasks/id.lua needs to return a table with at least 3 functions:
process(squad)
shouldRetask(squad), return either false, true, or a specific _meta.tasks.*
shouldReinforce(squad, location), return true if you want reinforcements at the given location