Clinchers: Tube, CO2, carbon minipump, SKS microtool with Park patch and allen key inside, money. All inside a Lezyne large Caddy Sack.
Tubs: Tube of Tufo sealant, C02, carbon minipump, spanner (it’s a fixed wheel), SKS microtool. In a small sandwich bag.
I use Cateye saddle rail mounted light brackets, so no room for a seatpack, in accordance with the rules.
EDIT: For the commuter, I use a btwin tool bottle that is always on the bike. Looks smart and has Tube, CO2, spanner (fixed again), Park multitool, gloves, tyre levers (wheel removal can get dirty wit ha fixed), allen key for fast rack removal, spare bold. Pump is frame mounted.