skill-installer
Install Codex skills into the canonical git source tree from a curated list or a GitHub repo path. Use when a user asks to list installable skills, install a curated skill, or install a skill from another repo (including private repos).
58
67%
Does it follow best practices?
Impact
—
No eval scenarios have been run
Advisory
Suggest reviewing before use
Optimize this skill with Tessl
npx tessl skill review --optimize ./Plugins/skill-factory/fixtures/budget-archive/2026-04-19/skills/infrastructure_ops/infrastructure_ops/skill-installer/SKILL.mdSecurity
2 findings — 2 medium severity. This skill can be installed but you should review these findings before use.
W011: Third-party content exposure detected (indirect prompt injection risk)
What this means
The skill exposes the agent to untrusted, user-generated content from public third-party sources, creating a risk of indirect prompt injection. This includes browsing arbitrary URLs, reading social media posts or forum comments, and analyzing content from unknown websites.
Why it was flagged
Third-party content exposure detected (high risk: 0.80). The installer explicitly fetches and ingests public GitHub content (via the GitHub API and codeload.github.com) as part of its required workflow (see scripts/install-skill-from-github.pyw and scripts/list-skills.pyw and references/troubleshooting.md), and those user-authored skill files are installed into the runtime repo (potentially changing agent behavior), so untrusted third-party content can materially influence subsequent tool use.
W012: Unverifiable external dependency detected (runtime URL that controls agent)
What this means
The skill fetches instructions or code from an external URL at runtime, and the fetched content directly controls the agent’s prompts or executes code. This dynamic dependency allows the external source to modify the agent’s behavior without any changes to the skill itself.
Why it was flagged
Potentially malicious external URL detected (high risk: 0.90). The installer fetches remote skill packages and commit provenance at runtime (e.g., https://codeload.github.com/{owner}/{repo}/zip/{ref} and https://api.github.com/repos/{owner}/{repo}/commits/{ref}), and those fetched SKILL.md files are required by the installer and become skill instructions that directly control agent behavior once installed.
- Repository
- jscraik/Agent-Skills
- Commit
d00c351
- Audited
- Security analysis
Is this your skill?
If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.