add expo-overview skill

[Kudo]

Why

i noticed that if we ask agent "implement a mobile app using expo". that prompt would likely not triggering anything. that is because our current skills are scattered and each description isn't strong enough to indicate that's for expo generic skill.

How

• add an expo-overview skill that acts as a router and links to other skills. its description has generic description.
• also add ci github check to make sure new skill should be added to the expo-overview skill

references:

• sentry: https://github.com/getsentry/sentry-for-ai/blob/main/skills/sentry-sdk-setup/SKILL.md
• convex: https://github.com/get-convex/agent-skills/blob/main/skills/convex/SKILL.md

Test Plan

prompt: implement a mobile app referencing uploaded screenshot. use expo to build the app and probably using expo ui primitives to match ios ui design best practice

screenshot as downstack pr

here's the eval result

https://claude.ai/code/artifact/f7e24cff-f8b7-4c43-a262-37b072ad47df

[Kudo]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• add expo-overview skill #95 👈 (View in Graphite)
• add expo-plugin-eval #94
• main

This stack of pull requests is managed by Graphite. Learn more about stacking.

[davidmokos]

what if we name it how-to-build-a mobile-app?