Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add suryast/free-ai-agent-skills --skill skill-securitygit clone --depth 1 https://github.com/suryast/free-ai-agent-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/suryast/free-ai-agent-skills/skill-security)<a href="https://agentmods.dev/skills/suryast/free-ai-agent-skills/skill-security"><img src="https://agentmods.dev/badge/skills/suryast/free-ai-agent-skills/skill-security/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/suryast/free-ai-agent-skills/skill-security"><img src="https://agentmods.dev/badge/skills/suryast/free-ai-agent-skills/skill-security.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00062 | $0.00954 |
| Opus 5.5 | $0.00025 | $0.00382 |
| Sonnet 5.5 | $0.00012 | $0.00191 |
| Haiku 4.5 | $0.00006 | $0.00095 |
Grade A, and why
skill-security scanned grade A with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 16d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
| **Network Exfiltration** | 🚨 HIGH | `requests.`, `urllib`, `http.client`, `socket.`, `fetch(`, `axios` | Runs shell commandslowCapability
Expected in a hook, worth knowing in a rule or an instructions file.
| **Subprocess Abuse** | ⚠️ MEDIUM | `subprocess.run`, `os.system`, `child_process` with credentials | How it starts
The opening of the file, as written. The whole thing — 95 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Skill Security Scanner
Security audit tool for AI agent skills. Run before installing any new skill.
Bundled Resources
Run from this skill directory (resolve it from the installed package, not the workspace).
- audit.sh — scan one skill; critical findings append to this package's blocklist.txt.
- audit-all.sh — scan OpenClaw built-in skills and
~/skills; no directory argument. - preinstall-check.sh — check the allowlist.txt and blocklist before auditing.
Quick Audit
# Audit a skill directory
./audit.sh /path/to/skill
# Audit all installed skills
./audit-all.sh
What It Checks
| Check | Risk Level | Pattern |
|---|---|---|
| Network Exfiltration | 🚨 HIGH | requests., urllib, http.client, socket., fetch(, axios |
| Credential Harvesting | 🚨 HIGH | .ssh/, .aws/, pass , keyring, credential, secret, token file reads |
| Code Injection | 🚨 CRITICAL | exec(, eval(, compile(, Function(, __import__ |
| Obfuscation | ⚠️ MEDIUM | base64.decode, atob, encoded payloads |
| Env Dumping | ⚠️ MEDIUM | os.environ, process.env, getenv bulk access |
| Subprocess Abuse | ⚠️ MEDIUM | subprocess.run, os.system, child_process with credentials |
Severity Levels
- CRITICAL (🚨): Block installation, report to owner
- HIGH (🔴): Requires manual review before use
- MEDIUM (🟡): Note but allow if from trusted source
- LOW (🟢): Informational only
Safe Skill Checklist
Before using any skill:
- ✅ Is it from a trusted source? (official OpenClaw, known publisher)
- ✅ Is the code readable (not obfuscated)?
- ✅ Does it document why it needs network/credential access?
- ✅ Does it scope file access to its own directory?
- ✅ Has it been audited by the community?
Integration with AGENTS.md
Add this to your workflow:
## Skill Installation Protocol
Before loading any new skill:
1. Run `./audit.sh <skill-path>`
2. If CRITICAL/HIGH findings → STOP, alert the user
3. If MEDIUM findings → Review manually, proceed if justified
4. If CLEAN → Safe to use
What ships with it
5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 16d ago Changed · +6 lines 21076a8bd3ca
- 1mo ago First seen · 89 lines · 62 tokens per session scan A a3993ff80a36
skill-security is a skill published in the GitHub repository suryast/free-ai-agent-skills (2 stars, last pushed 3d ago), licensed MIT. It adds 62 tokens to every session and 954 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 2 findings (makes network calls, runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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