Yesterday, I spent all morning and most of the afternoon reading code, tangentially looking for a bug-ish behavior. At 3:30pm, I reached a moment of clarity. I deleted one line and added another.
I did more yesterday than the entire previous week towards the goals of the project.
I spent the day coding. I did very little typing.
"Technical skills" at all of the jobs that I have had entail much more than writing code. The key technical skills are mastery of the problem domain, not the programming language.