Feature request: user-level skill sharing mechanism

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

I want to write a skill once and use it in multiple projects.

Proposed Solution

• User-level ~/.claude/skills/ directory
• CLI commands for skill management (claude skill link, claude skill list)
• Personal skill registry

Alternative Solutions

• Copy and paste
• Symlinks

Priority

Medium - Would be very helpful

Feature Category

CLI commands and flags

Use Case Example

1. I wrote a skill using skill-authoring tooling I have in a local claude-centric project
2. I want to use that skill in another project
3. I have many skills like this
4. (optional) I need to do some additional stuff when importing the skill, like updating a list of skills that should be used for a particular task

Additional Context

_No response_