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/ersinkoc/security-check/sc-clickjackingnpx skills add ersinkoc/security-check --skill sc-clickjackinggit clone --depth 1 https://github.com/ersinkoc/security-checkWrote 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/ersinkoc/security-check/sc-clickjacking)<a href="https://agentmods.dev/skills/ersinkoc/security-check/sc-clickjacking"><img src="https://agentmods.dev/badge/skills/ersinkoc/security-check/sc-clickjacking.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 | $0.00024 | $0.00800 |
| Opus 5 | $0.00012 | $0.00400 |
| Sonnet 5 | $0.00005 | $0.00160 |
| Haiku 4.5 | $0.00002 | $0.00080 |
Grade A, and why
sc-clickjacking scanned grade A with 0 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 5d 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 94 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SC: Clickjacking / UI Redressing
Purpose
Detects clickjacking vulnerabilities where applications can be embedded in iframes on malicious sites, tricking users into clicking hidden elements. Checks for missing X-Frame-Options header, missing Content-Security-Policy frame-ancestors directive, and framebusting bypass vulnerabilities.
Activation
Called by sc-orchestrator during Phase 2 when web applications serving HTML are detected.
Phase 1: Discovery
Keyword Patterns to Search
"X-Frame-Options", "frame-ancestors", "DENY", "SAMEORIGIN",
"helmet", "frameguard", "X_FRAME_OPTIONS",
"SECURE_BROWSER_XSS_FILTER", "clickjack"
Checks
- Is
X-Frame-Optionsheader set? (DENY or SAMEORIGIN) - Is
Content-Security-Policy: frame-ancestorsset? - Are both missing? (Clickjacking possible)
- Is there JavaScript-based framebusting that can be bypassed?
Configuration Examples
// VULNERABLE: No frame protection headers
app.get('/', (req, res) => {
res.send('<html>...'); // Can be iframed by any site
});
// SAFE: Using helmet
const helmet = require('helmet');
app.use(helmet.frameguard({ action: 'deny' }));
// Or CSP
app.use(helmet.contentSecurityPolicy({
directives: { frameAncestors: ["'self'"] }
}));
# Django settings.py
X_FRAME_OPTIONS = 'DENY' # SAFE
# If missing → VULNERABLE
// SAFE: Set header in middleware
func securityHeaders(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("X-Frame-Options", "DENY")
w.Header().Set("Content-Security-Policy", "frame-ancestors 'none'")
next.ServeHTTP(w, r)
})
}
Severity Classification
- Critical: Missing frame protection on pages with sensitive actions (transfers, settings)
- High: Missing frame protection on authenticated pages
- Medium: Missing frame protection on public pages with forms
- Low: Missing CSP frame-ancestors when X-Frame-Options is set (defense in depth)
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.
- 5d ago First seen · 94 lines · 24 tokens per session scan A 829e58ab645b
sc-clickjacking is a skill published in the GitHub repository ersinkoc/security-check (56 stars, last pushed 1mo ago), licensed MIT. It adds 24 tokens to every session and 800 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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