upskill: Generate and evaluate agent skills for code agents like Claude Code, Open Code, OpenAI Codex

by huggingface · Codex Skill · ★ 762

Last updated: · Indexed by AgentSkillsHub · Auto-synced every 8h

How to install upskill

uv pip install upskill
uvx upskill

Taken from the project's README on GitHub. Check the security audit before running it.

Security audit verdict: SAFE · quality 68/100

None of the 42 rules matched — no credential harvesting, no data exfiltration, no curl-pipe-shell installer. Scanned against 42 published rules built on the SlowMist agent-security taxonomy, refreshed every 8 hours. Full audit →

The quality score combines nine heuristic checks of the repo and its README: completeness, clarity, specificity, examples, structure, agent readiness, step-by-step content, instruction quality and security notes. It rates how well the project explains itself to an agent, not the code.

Quick Facts

Stars762
Forks93
LanguagePython
CategoryCodex Skill
LicenseApache-2.0
Quality Score68/100
Open Issues9
Last Updated2026-10-14
Created2026-01-21
Platformsclaude-code, codex, python
Est. Tokens~17k

About upskill

UPskill Generate and evaluate agent skills based on traces with agents. Create skills with teacher models (expensive/slow) that student models (cheap/fast) can use to perform harder tasks reliably. [!TIP] UPskill v2 - recommended default config file now runs evaluations on Hugging Face Jobs.

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How this security grade is produced

Grades come from a rule-based scan built on the SlowMist agent-security taxonomy: 42 published rules, covering credential harvesting, data exfiltration, curl | sh installers and more. It is a first-layer scan, not a manual audit — we say so rather than overstate it.

The scale of the problem is documented independently: Liu et al. (2026), in a study of 31,132 agent skills, report that 26.1% contain security vulnerabilities. Our own full-catalog census is published as a citable open dataset.

Sources & who's responsible:

View on GitHub → Browse Codex Skill tools