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 agentmods add skills/spritualkb/ctfskill/ctf-web-skillnpx skills add Spritualkb/CTFskill --skill ctf-web-skillgit clone --depth 1 https://github.com/Spritualkb/CTFskillWrote 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/spritualkb/ctfskill/ctf-web-skill)<a href="https://agentmods.dev/skills/spritualkb/ctfskill/ctf-web-skill"><img src="https://agentmods.dev/badge/skills/spritualkb/ctfskill/ctf-web-skill.svg" alt="Measured on agentmods" 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 | $0.00190 | $0.05518 |
| Opus 5 | $0.00095 | $0.02759 |
| Sonnet 5 | $0.00038 | $0.01104 |
| Haiku 4.5 | $0.00019 | $0.00552 |
Grade C, and why
CTF Web Solver scanned grade C with 3 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 6d 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.
Encoded or obfuscated payloadmediumSupply chain
base64 or hex that is decoded and executed hides what actually runs from anyone reading the file.
<script>eval(atob('YWxlcnQoMSk='))</script> Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
Cloud metadata endpointmediumServer-side request forgery
One request to 169.254.169.254 can return temporary IAM credentials.
4. 云元数据 → 169.254.169.254 Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -I http://target.com # HTTP 响应头 The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
What ships with it
18 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.
- docs/PAYLOADS.md 5.4 KB
- docs/QUICKREF.md 3.7 KB
- docs/TOOLS.md 4.4 KB
- modules/blockchain.md 8.5 KB
- modules/cve.md 7.5 KB
- modules/deserialize.md 6.9 KB
- modules/java.md 8.2 KB
- modules/jwt.md 9.5 KB
- modules/lfi.md 10 KB
- modules/php.md 7.9 KB
- modules/rce.md 9.6 KB
- modules/recon.md 9.1 KB
- modules/sqli.md 11 KB
- modules/ssrf.md 8.7 KB
- modules/ssti.md 7.8 KB
- modules/upload.md 10 KB
- modules/xss.md 9.1 KB
- modules/xxe.md 9.4 KB
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.
- 6d ago First seen · 659 lines · 190 tokens per session scan C 0caff91287b4
CTF Web Solver is a skill published in the GitHub repository Spritualkb/CTFskill (5 stars, last pushed 8mo ago), with no licence file. It adds 190 tokens to every session and 5,518 once invoked, about $0.0010 per session on Opus 5. A static security scan graded it C with 3 findings (encoded or obfuscated payload, cloud metadata endpoint, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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