Borrowing it
Nothing to install: this file belongs to Everyone-Needs-A-Copilot/claude-copilot. 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/Everyone-Needs-A-Copilot/claude-copilot/main/.claude/skills/security/web-security/SKILL.mdgit clone --depth 1 https://github.com/Everyone-Needs-A-Copilot/claude-copilotWrote 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/everyone-needs-a-copilot/claude-copilot/web-security)<a href="https://agentmods.dev/skills/everyone-needs-a-copilot/claude-copilot/web-security"><img src="https://agentmods.dev/badge/skills/everyone-needs-a-copilot/claude-copilot/web-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/everyone-needs-a-copilot/claude-copilot/web-security"><img src="https://agentmods.dev/badge/skills/everyone-needs-a-copilot/claude-copilot/web-security.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00111 | $0.02006 |
| Opus 5.5 | $0.00044 | $0.00802 |
| Sonnet 5.5 | $0.00022 | $0.00401 |
| Haiku 4.5 | $0.00011 | $0.00201 |
Grade A, and why
web-security scanned grade A with 1 finding 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 1mo 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.
const response = await fetch(req.body.url); How it starts
The opening of the file, as written. The whole thing — 212 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Web Security
Comprehensive web application security patterns covering OWASP Top 10 (2021). Apply before code review, not after.
OWASP analysis is prose judgment — the model reasons about attack vectors, code patterns, and mitigations. OWASP coverage is deterministic — the script validates that every finding maps to a real OWASP category and reports which of the 10 categories have zero findings (the blind spots).
Never report a "clean" security review without running the coverage checker.
OWASP Top 10 (2021) — Quick Reference
| Code | Category | Core Risk |
|---|---|---|
| A01 | Broken Access Control | Unauthorized access, IDOR, privilege escalation |
| A02 | Cryptographic Failures | Plaintext storage, weak algorithms, missing TLS |
| A03 | Injection | SQL, NoSQL, OS, LDAP injection; XSS |
| A04 | Insecure Design | Missing threat model, no security requirements |
| A05 | Security Misconfiguration | Default creds, verbose errors, open CORS |
| A06 | Vulnerable and Outdated Components | CVE-carrying dependencies |
| A07 | Identification and Authentication Failures | Weak passwords, no MFA, session issues |
| A08 | Software and Data Integrity Failures | Unsigned updates, unsafe deserialization |
| A09 | Security Logging and Monitoring Failures | Undetected breaches, missing audit logs |
| A10 | Server-Side Request Forgery (SSRF) | Internal service access via user-controlled URLs |
Invocation — OWASP Coverage Scorer (L3 Script)
After identifying findings, assemble them as a JSON array and run the scorer. Consume its output only — the script source never enters context.
Format each finding:
[
{
"title": "Admin endpoint lacks authentication check",
"owasp": "A01",
"severity": "Critical",
"status": "open"
}
]
OWASP field: Use short codes A01–A10, or full OWASP 2021 category names (e.g. "Injection"), or common shorthands ("SSRF", "IDOR", "sqli", "authentication").
severity field (optional): Critical | High | Medium | Low
What ships with it
2 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.
- 1mo ago First seen · 212 lines · 111 tokens per session scan A 6e39affec1c7
web-security is a skill published in the GitHub repository Everyone-Needs-A-Copilot/claude-copilot (14 stars, last pushed yesterday), licensed MIT. It adds 111 tokens to every session and 2,006 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-04.
Other skills, from other repositories
code-reviewer
Activates CodeReviewer for systematic, multi-dimensional code review. Use when you need a pull request reviewed for correctness, security vulnerabilities, performance bottlenecks, architectural quality, test coverage gaps, or maintainability issues. Produces a structured review with severity-labeled findings and…
github-intelligence
Activates GitHubIntelligence for repository analysis, contributor intelligence, and open source strategy. Use when you need to analyze a GitHub repository for code quality and activity health, identify key contributors and bus factor risk, build a competitive open source landscape analysis, design a contributor…
merge-batch
Prepare and merge an owner-selected PR batch with contributor credit and exact-candidate admission. Use for a pasted PR list; combined focused validation is diagnostic, and every actual landing still requires its applicable checks and authorization.
make-pr-easy-to-review
Prepare PRs for review by cleaning noisy history, improving PR descriptions, and adding reviewer guidance without changing code behavior. Use for "make this easy to review", "tidy this PR", "clean up commits", or "annotate the diff".
review-work
Post-implementation gate review: run manual QA on the real surface yourself, then launch ONE gate reviewer (never a panel) to audit goal, constraints, code quality, security, missed context, and QA evidence. Use before a PR handoff or when the user explicitly asks to review completed work.
security-review
Perform a focused security review of pending git changes to identify high-confidence security vulnerabilities with real exploitation potential. Use this skill when the user asks for a security review, security audit, vulnerability scan, or wants to check pending changes on a branch for security issues before merging.…