Thoughts from my first ever "agentic coding" interview:

1. I've never had someone watch me prompt before. Same uneasiness as coding in a coding interview.

2. I learned more than in any other interview. You just learn a lot by building something from scratch.

3. I thought Opus 4.7 could one-shot the task, but I had to think about, "What signal does that send?" I went incrementally and thought through the design decisions myself rather than let Opus pick (even though I expect Opus would pick correctly, since the task was standard enough to be well represented in the training data).

4. Don't forget to commit the initial state, so you can tell what your agents changed.

5. I use isomux for building, so I'm using it for interviews too. No idea what the interviewers thought of that.

One cool thing about using Isomux: I created a room just for the interview, and then explained the context of the interview in the Room Prompt. This way, any agents I spawn in the room automatically know what's going on.