I have my Swiss army knife - does that count? haha
No tubes, no pump, no rain gear, nothing. Vancouver is going into the fall / winter season so it's more like Raincouver this week. First order of business is to buy boot covers and a waterproof jacket. I will make sure the jacket is reflective
I learned the hard way a month or so into commuting that it sucks to get a flat when you're unprepared. Gotta take your dead-weight bike on the bus or in a taxi or whatever, get it to a shop.. it's a pain. Tubes, multitool, tire levers, pump, bag, maybe even CO2 aren't that expensive, and well worth it if you need them. MEC is great for that stuff. PM me if you'd like any advice.