I use it similarly, but I add spots for side x side as well as left, center, right. I only use Hammerspoon for this and a couple tiny things, but it's completely worth it for this alone. Use math to specify window sizes & location. Insanity.
local mode = hs.screen.primaryScreen():currentMode()
local mods = {"ctrl", "alt", "cmd"} -- mash those keys
-- regular app windows
do
local w = 1094 -- no clip on GitHub, HN
local h = 1122 -- tallish
local x_1 = 0 -- left edge
local x_2 = math.max(0, (mode.w - w - w) / 2) -- left middle
local x_3 = (mode.w - w) / 2 -- middle
local x_4 = math.min(mode.w - w, x_2 + w + 1) -- right middle
local x_5 = mode.w - w -- right edge
local y = 23 -- top of screen below menu bar
hs.hotkey.bind(mods, "2", function() move_win( 0, y, mode.w, mode.h) end) -- max
hs.hotkey.bind(mods, "3", function() move_win(x_1, y, w, h) end)
hs.hotkey.bind(mods, "4", function() move_win(x_2, y, w, h) end)
hs.hotkey.bind(mods, "5", function() move_win(x_3, y, w, h) end)
hs.hotkey.bind(mods, "6", function() move_win(x_4, y, w, h) end)
hs.hotkey.bind(mods, "7", function() move_win(x_5, y, w, h) end)
end
function move_win(x, y, w, h)
hs.window.focusedWindow():setFrame(hs.geometry.rect(x, y, w, h))
end