Copilot CLI Not Detecting Symlinked Skills

[thealokkr]

Describe the bug

The /skills list command:

 - Only detects skills in real directories
 - Ignores skills that are accessed via symlinks
 - In the reproduction case above, test-skill is not listed

Real-World Example

Example directory structure:

 $ ls -la ~/.copilot/skills/
 total 0
 drwxr-xr-x  6 user  staff  192 19 Jan 01:57 .
 drwx------@ 8 user  staff  256 18 Jan 15:17 ..
 lrwxr-xr-x  1 user  staff   50 19 Jan 01:57 skill-a -> /path/to/external/skills/skill-a
 lrwxr-xr-x  1 user  staff   50 19 Jan 01:57 skill-b -> /path/to/external/skills/skill-b
 lrwxr-xr-x  1 user  staff   50 19 Jan 01:57 skill-c -> /path/to/external/skills/skill-c
 drwxr-xr-x  6 user  staff  192 19 Jan 01:26 skill-d
 lrwxr-xr-x  1 user  staff   50 19 Jan 01:57 skill-e -> /path/to/external/skills/skill-e

All symlinked skills are valid and contain SKILL.md files:

 $ find -L ~/.copilot/skills -name "SKILL.md" -type f | sort
 ./skill-a/SKILL.md
 ./skill-b/SKILL.md
 ./skill-c/SKILL.md
 ./skill-d/SKILL.md
 ./skill-e/SKILL.md

However, /skills list only shows skill-d (the only real directory).

Affected version

No response

Steps to reproduce the behavior

The /skills list command:

 - Only detects skills in real directories
 - Ignores skills that are accessed via symlinks
 - In the reproduction case above, test-skill is not listed

Real-World Example

Example directory structure:

 $ ls -la ~/.copilot/skills/
 total 0
 drwxr-xr-x  6 user  staff  192 19 Jan 01:57 .
 drwx------@ 8 user  staff  256 18 Jan 15:17 ..
 lrwxr-xr-x  1 user  staff   50 19 Jan 01:57 skill-a -> /path/to/external/skills/skill-a
 lrwxr-xr-x  1 user  staff   50 19 Jan 01:57 skill-b -> /path/to/external/skills/skill-b
 lrwxr-xr-x  1 user  staff   50 19 Jan 01:57 skill-c -> /path/to/external/skills/skill-c
 drwxr-xr-x  6 user  staff  192 19 Jan 01:26 skill-d
 lrwxr-xr-x  1 user  staff   50 19 Jan 01:57 skill-e -> /path/to/external/skills/skill-e

All symlinked skills are valid and contain SKILL.md files:

 $ find -L ~/.copilot/skills -name "SKILL.md" -type f | sort
 ./skill-a/SKILL.md
 ./skill-b/SKILL.md
 ./skill-c/SKILL.md
 ./skill-d/SKILL.md
 ./skill-e/SKILL.md

However, /skills list only shows skill-d (the only real directory).

Expected behavior

/skills list should be able to read and use symlinked skills and not just physical files

Additional context

No response