Borrowing it
Nothing to install: this file belongs to HsienW/chat-gun-react-agent. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/HsienW/chat-gun-react-agent/master/.agents/skills/security-and-hardening/SKILL.mdgit clone --depth 1 https://github.com/HsienW/chat-gun-react-agentWrote 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/hsienw/chat-gun-react-agent/security-and-hardening)<a href="https://agentmods.dev/skills/hsienw/chat-gun-react-agent/security-and-hardening"><img src="https://agentmods.dev/badge/skills/hsienw/chat-gun-react-agent/security-and-hardening/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/hsienw/chat-gun-react-agent/security-and-hardening"><img src="https://agentmods.dev/badge/skills/hsienw/chat-gun-react-agent/security-and-hardening.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 | $0.00048 | $0.04450 |
| Opus 5 | $0.00024 | $0.02225 |
| Sonnet 5 | $0.00010 | $0.00890 |
| Haiku 4.5 | $0.00005 | $0.00445 |
Grade B, and why
security-and-hardening scanned grade B 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 10d 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.
Cloud metadata endpointmediumServer-side request forgery
One request to 169.254.169.254 can return temporary IAM credentials.
The `range() !== 'unicast'` check covers loopback, link-local `169.254.169.254` (cloud metadata, the #1 SSRF target), private, and unique-local ranges across IPv4 and IPv6. Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
Unrestricted tool accesslowExcessive agency
A wildcard tool grant or "run any command" leaves no least-privilege boundary at all.
- **Be wary of `postinstall` scripts** in unfamiliar packages — they run arbitrary code at install time. 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.
await fetch(req.body.webhookUrl); The source is not reproduced here
A licence we could not identify
The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.
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.
- 10d ago First seen · 462 lines · 48 tokens per session scan B 8fed058a5202
security-and-hardening is a skill published in the GitHub repository HsienW/chat-gun-react-agent (133 stars, last pushed 5d ago), with no licence file. It adds 48 tokens to every session and 4,450 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 3 findings (cloud metadata endpoint, unrestricted tool access, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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