Comment by msp26

This doesn't surprise me.

I have a SKILL.md for marimo notebooks with instructions in the frontmatter to always read it before working with marimo files. But half the time Claude Code still doesn't invoke it even with me mentioning marimo in the first conversation turn.

I've resorted to typing "read marimo skill" manually and that works fine. Technically you can use skills with slash commands but that automatically sends off the message too which just wastes time.

But the actual concept of instructions to load in certain scenarios is very good and has been worth the time to write up the skill.