Symlink containment check breaks on Python 3.8 runtimes

[erensunerr]

Affected file: sk/agents-md/skills/skill-scanner/scripts/scan_skill.py

What I hit

I ran the scanner in a Python 3.8 setup and it crashed before producing scan results.

I’m thinking this is due to:

is_internal = target.is_relative_to(skill_dir.resolve())

which is not available on older interpreter versions.

Repro

1. Execute the script under Python 3.8.
2. Scan a workspace containing a symlink case.
3. The script exits with AttributeError.

Expected

The scanner should run on legacy supported versions without crashing on path checks.

Actual

One API call can fail and abort the scan flow.

Suggested fix

Use .resolve() + relative_to with exception handling for Python compatibility.

[erensunerr]

Btw I’m working on a free project called Skillfully, and it helps skill authors like you get direct feedback from the users' coding agents.

It takes <30s to start tracking your skill; it will help you avoid this situation in the future :))