Describe the bug

When installing a skill to the universal user location, such as:

gh skill install multica-ai/andrej-karpathy-skills karpathy-guidelines --scope=user --agent=universal

The skill is installed into the wrong place. It goes to ~/.config/agents/skills, while https://agentskills.io/client-implementation/adding-skills-support clearly states that ~/.agents/skills is the standard location, and at least CopilotCLI, Pi, and OpenCode do not pick up skills at ~/.config/agents/skills, while they all pick them up from ~/.agents/skills. (I prefer the .config nesting personally, but it doesn't work with anyone, so it's not universal :) )

Affected version

gh version 2.92.0 (2026-04-28)
https://github.com/cli/cli/releases/tag/v2.92.0

Steps to reproduce the behavior

1. Type this gh skill install multica-ai/andrej-karpathy-skills karpathy-guidelines --scope=user --agent=universal
2. Look at the location the skill gets installed to

Expected vs actual behavior

Should have gone to the universal location instead.