[FEATURE]: Auto-discovery of nested skills

[felixAnhalt]

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

It might be useful for multi-repository contexts being worked on in cloud instances to have a similar nested discovery system to #10678.

Concrete: load skills from .opencode folders which are nested in the workspace.

[github-actions]

This issue might be a duplicate of or closely related to existing issues. Please check:

• [FEATURE]: Context Auto-Discovery: Load AGENTS.md from Directories When Accessing Files #6316: Context Auto-Discovery for loading AGENTS.md from directories using upward search - the same pattern proposed here but for AGENTS.md files
• Feature Request: Plugin-bundled Skills Discovery #10148: Plugin-bundled Skills Discovery - proposes auto-discovery of skills bundled with plugins, same nested discovery concept
• [FEATURE]: Allow custom skills directories #8533: Allow custom skills directories - foundational feature for enabling nested skills discovery
• [FEATURE]: Plugin discovery should support subdirectories like agents and commands #6866: Plugin discovery should support subdirectories - similar issue with discovery patterns in nested folders
• [FEATURE]: Auto-inject subdirectory CLAUDE.md files on read operations #7361: Auto-inject subdirectory CLAUDE.md files - Claude Code compatibility using the same directory-walking strategy

Feel free to ignore if these don't address your specific case, or merge/coordinate with one of these existing threads!