codex needs to be told where to make personal skills.

[obra]

"Another note: I was in the 'beads' repo and tried to have it write a 'beads' skill. It seemed to get the job after one false start (it invoked brainstorming and was asking dumb questions, I made it invoke the skillbuilder). The results looked great! But it tried to add it to README.md instead of putting it int he right place."

ht @danshapiro