use-skill-dl-util

CRITICAL E005: Suspicious download URL detected in skill instructions.

• Suspicious download URL detected (high risk: 0.80). Most URLs are content pages on playbooks.com (low risk), but the presence of a direct raw.githubusercontent.com/install.sh and explicit curl | bash instructions is a high-risk distribution vector—running an unreviewed shell script from an individual GitHub user can install malware or backdoors.

MEDIUM W011: Third-party content exposure detected (indirect prompt injection risk).

• Third-party content exposure detected (high risk: 0.90). The skill explicitly instructs using skill-dl to search and scrape public sites (Serper/Google and playbooks.com via built-in scraping and Scrapedo) and to download and "Read SKILL.md fully" and inspect downloaded references (references/corpus-inspection.md and SKILL.md download instructions), meaning the agent will ingest untrusted, user-generated third‑party content that can influence subsequent decisions and actions.

MEDIUM W012: Unverifiable external dependency detected (runtime URL that controls agent).

• Potentially malicious external URL detected (high risk: 0.90). The skill's prerequisite explicitly runs a remote installer via curl piped to bash (https://raw.githubusercontent.com/yigitkonur/cli-skill-downloader/main/install.sh), which fetches and executes remote code as a required install step, so it is flagged.