[jeffyang]

Agree with doing all 3.

Additional thoughts: 1. Can you ask to chat informally with the person leaving and see if there's a reason they all left? Might be interesting to know. Is this only on the one team or across the company?

2. Do you know if it's the type of culture that would punish you for holding the bag if things go south or one that would reward you? If the former, I would definitely change teams/companies. If the latter, it sounds like a great opportunity. If you aren't sure, maybe chat with other people to find out.

3. As mentioned, this could be a big opportunity. You could for example say that you'd be happy to run the team if they give you 2 engineers (or whatever you think you need). I wouldn't ask for a raise/promotion in the first conversation, but it's definitely something you want to discuss fairly early.

4. Definitely set up time with your higher level manager and see what their thoughts are. I would just be really up front with them, tell them how this definitely a unique situation, find out what their plans are, and let them know what you want to do. The worst thing is if they are hand wavy and give you a vague deadline for resolving things. Try to get to specifics, and even if they don't know, they should be able to give you a plan and a rough timeline for figuring out the resolution.

Also want to mention that I'm hiring, feel free to reach out to me if you're interested (see my profile).