[FEATURE] Name-based Skill Dependency Resolution

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

Skills currently lack a way to reference other skills by name. To compose skills (e.g., extend frontend-design in a custom skill), authors must either:

• Hardcode paths (fragile: can be at user or project level, dependncies on OS)
• Instruct Claude to search multiple possible locations (not reliable)
• Copy the dependency skill's content (violating DRY)
• No way to express error or gracful handling "use this skill if available"

Proposed Solution

Add optional requires or depends field to SKILL.md frontmatter:

name: my-custom-frontend
description: Custom frontend skill with company design system
requires:
  - frontend-design        # resolved at runtime
  - docx                   # optional: soft dependency

Alternative Solutions

_No response_

Priority

Medium - Would be very helpful

Feature Category

Configuration and settings

Use Case Example

_No response_

Additional Context

Related to https://github.com/anthropics/claude-code/issues/15944