Security And Hardening
penpot/penpot
Hardens code against vulnerabilities. An agent skill from penpot/penpot.
Agent skill
by jeremylongshore in jeremylongshore/tons-of-skills-marketplace
Execute this skill enables AI assistant to automatically scan for xss (cross-site scripting) vulnerabilities in code.
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill scanning-for-xss-vulnerabilities -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install jeremylongshore/tons-of-skills-marketplace scanning-for-xss-vulnerabilities --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/.curated/scanning-for-xss-vulnerabilities .claude/skills/scanning-for-xss-vulnerabilities && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "scanning-for-xss-vulnerabilities" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/scanning-for-xss-vulnerabilities into .claude/skills/scanning-for-xss-vulnerabilities/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "scanning-for-xss-vulnerabilities", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/scanning-for-xss-vulnerabilitiesType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill scanning-for-xss-vulnerabilities -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install jeremylongshore/tons-of-skills-marketplace scanning-for-xss-vulnerabilities --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/.curated/scanning-for-xss-vulnerabilities .agents/skills/scanning-for-xss-vulnerabilities && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "scanning-for-xss-vulnerabilities" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/scanning-for-xss-vulnerabilities into .agents/skills/scanning-for-xss-vulnerabilities/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "scanning-for-xss-vulnerabilities", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill scanning-for-xss-vulnerabilities -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install jeremylongshore/tons-of-skills-marketplace scanning-for-xss-vulnerabilities --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/.curated/scanning-for-xss-vulnerabilities .cursor/skills/scanning-for-xss-vulnerabilities && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "scanning-for-xss-vulnerabilities" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/scanning-for-xss-vulnerabilities into .cursor/skills/scanning-for-xss-vulnerabilities/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "scanning-for-xss-vulnerabilities", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/jeremylongshore/tons-of-skills-marketplace.git --path skills/.curated/scanning-for-xss-vulnerabilities--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill scanning-for-xss-vulnerabilities -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install jeremylongshore/tons-of-skills-marketplace scanning-for-xss-vulnerabilities --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/.curated/scanning-for-xss-vulnerabilities .gemini/skills/scanning-for-xss-vulnerabilities && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "scanning-for-xss-vulnerabilities" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/scanning-for-xss-vulnerabilities into .gemini/skills/scanning-for-xss-vulnerabilities/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "scanning-for-xss-vulnerabilities", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install jeremylongshore/tons-of-skills-marketplace scanning-for-xss-vulnerabilitiesInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill scanning-for-xss-vulnerabilities -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/.curated/scanning-for-xss-vulnerabilities .github/skills/scanning-for-xss-vulnerabilities && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "scanning-for-xss-vulnerabilities" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/scanning-for-xss-vulnerabilities into .github/skills/scanning-for-xss-vulnerabilities/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "scanning-for-xss-vulnerabilities", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill scanning-for-xss-vulnerabilities -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install jeremylongshore/tons-of-skills-marketplace scanning-for-xss-vulnerabilities --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/.curated/scanning-for-xss-vulnerabilities .opencode/skills/scanning-for-xss-vulnerabilities && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "scanning-for-xss-vulnerabilities" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/scanning-for-xss-vulnerabilities into .opencode/skills/scanning-for-xss-vulnerabilities/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "scanning-for-xss-vulnerabilities", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
scanning-for-xss-vulnerabilitiesExecute this skill enables AI assistant to automatically scan for xss (cross-site scripting) vulnerabilities in code.
Scanning For Xss Vulnerabilities is an agent skill from jeremylongshore/tons-of-skills-marketplace. Execute this skill enables AI assistant to automatically scan for xss (cross-site scripting) vulnerabilities in code. it is triggered when the user requests to "scan for xss vulnerabilities", "check for xss", or uses the command "/xss". the skill identifies ref... Use when appropriate context detected. Trigger with relevant phrases based on skill purpose.
Its SKILL.md is about 1.1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 6 other files, including scripts, reference files and assets (for example `assets/README.md`, `references/README.md` and `scripts/README.md`). Compatibility notes: Designed for Claude Code
It sits in Security, covering Web application vulnerabilities. The repository describes itself as: Model-agnostic agent-skills platform with a harness-free canonical layer, verified adapters, and the ccpi package manager. Explore at tonsofskills.com. The licence is MIT.
4 steps, taken from the first numbered list in SKILL.md.
Read from SKILL.md and the folder at commit cfae287. It shows what the files ask for, not the result of running them.
Pre-approves these tools, so the agent can use them without asking each time:
ReadWebFetchWebSearchGrepFrom allowed-tools in the SKILL.md frontmatter.
Ships 1 file in scripts/, which the agent can run.
From the folder's file list and the shell code blocks in SKILL.md.
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Designed for Claude Code
From compatibility in the SKILL.md frontmatter.
Scanning For Xss Vulnerabilities loads about 1.1k tokens when it runs, and up to ~1.1k if it reads all its reference files. Until then it costs about 98 tokens; SKILL.md has 503 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.
The full file from jeremylongshore/tons-of-skills-marketplace at commit cfae287, republished under its MIT licence (© jeremylongshore). 503 words, ~1,103 tokens.
.claude/skills/scanning-for-xss-vulnerabilities/SKILL.md (or your agent's skills folder). This skill also uses 3 other files; get the full folder from GitHub.Detect reflected, stored, and DOM-based XSS vulnerabilities through context-aware analysis of HTML, JavaScript, CSS, and URL injection points, with WAF bypass testing and CSP evaluation.
This skill empowers Claude to proactively identify and report XSS vulnerabilities within your codebase. By leveraging advanced detection techniques, including context-aware analysis and WAF bypass testing, this skill ensures your web applications are resilient against common XSS attack vectors. It provides detailed insights into vulnerability types and offers guidance on remediation strategies.
This skill activates when you need to:
User request: "scan for XSS vulnerabilities in the search functionality"
The skill will:
User request: "/xss check the comment submission form"
The skill will:
sanitizeHtml.This skill complements other security-focused plugins by providing targeted XSS vulnerability detection. It can be integrated with code review tools to automate security checks and provide developers with immediate feedback on potential XSS issues.
The skill produces structured output relevant to the task.
© jeremylongshore, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
SKILL.md and 3 other files (scripts, references, assets) in skills/.curated/scanning-for-xss-vulnerabilities of jeremylongshore/tons-of-skills-marketplace.
Open the folder on GitHubat commit cfae287
Scanning For Xss Vulnerabilities next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Scanning For Xss Vulnerabilities this skilljeremylongshore/tons-of-skills-marketplace | 2.8k | — | ~1.1k | Automated safety check: Pass | MIT | |
| Security And Hardeningpenpot/penpot | 61k | 6 repos | ~4.7k | Automated safety check: Notes | MPL-2.0 | |
| Security Auditoreigent-ai/eigent | 15k | — | ~1.8k | Automated safety check: Notes | Apache-2.0 | |
| Security Reviewjewbetcha/opentrace | 116 | 18 repos | ~3.1k | Automated safety check: Notes | MIT | |
| Strix Code Vulnerability Scanusestrix/strix | 68k | — | ~1.1k | Automated safety check: Pass | Apache-2.0 | |
| Code Audit3stoneBrother/code-audit | 892 | 1 repos | ~2.7k | Automated safety check: Pass | None |
penpot/penpot
Hardens code against vulnerabilities. An agent skill from penpot/penpot.
eigent-ai/eigent
Audits source code, dependencies and config files for vulnerabilities and hardcoded secrets, using two bundled Python scanners and an OWASP Top 10 checklist.
jewbetcha/opentrace
A skill your agent uses when adding authentication, handling user input, working with secrets, creating API endpoints, or implementing payment/sensitive features.
usestrix/strix
Runs a Strix white-box security review that reads the source, then exploits what it finds in a sandbox so each reported issue has a proof-of-concept.
3stoneBrother/code-audit
Professional code security audit skill covering 55+ vulnerability types.
usestrix/strix
Triages findings from a Strix pentest by severity, fixes each root cause with a minimal change, and re-runs Strix to confirm the exploit no longer works.
jeremylongshore/tons-of-skills-marketplace
Execute this skill enables AI assistant to conduct a security-focused code review using the security-agent plugin.
jeremylongshore/tons-of-skills-marketplace
Build this skill automates the adaptation of pre-trained machine learning models using transfer learning techniques.
jeremylongshore/tons-of-skills-marketplace
Execute proactive auto-loading: automatically detects and loads agents.md files.
jeremylongshore/tons-of-skills-marketplace
Aggregate and centralize performance metrics from applications, systems, databases, caches, and services.
jeremylongshore/tons-of-skills-marketplace
Execute this skill enables AI assistant to analyze capacity requirements and plan for future growth.
jeremylongshore/tons-of-skills-marketplace
Process use when you need to work with database indexing. An agent skill from jeremylongshore/tons-of-skills-marketplace.
Categories
Execute this skill enables AI assistant to automatically scan for xss (cross-site scripting) vulnerabilities in code. Scanning For Xss Vulnerabilities is an agent skill from jeremylongshore/tons-of-skills-marketplace. Execute this skill enables AI assistant to automatically scan for xss (cross-site scripting) vulnerabilities in code.
Scanning For Xss Vulnerabilities fits situations like: requests to scan for xss vulnerabilities; uses the command /xss; appropriate context detected; with relevant phrases based on skill purpose.
Run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill scanning-for-xss-vulnerabilities -a claude-code`. Or copy the skill folder (skills/.curated/scanning-for-xss-vulnerabilities in jeremylongshore/tons-of-skills-marketplace) into .claude/skills/scanning-for-xss-vulnerabilities in your project. Claude Code loads it when a task matches its description.
Run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill scanning-for-xss-vulnerabilities -a codex`. Or copy the skill folder (skills/.curated/scanning-for-xss-vulnerabilities in jeremylongshore/tons-of-skills-marketplace) into .agents/skills/scanning-for-xss-vulnerabilities in your project. Codex loads it when a task matches its description.
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill scanning-for-xss-vulnerabilities -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/scanning-for-xss-vulnerabilities, .gemini/skills/scanning-for-xss-vulnerabilities, .github/skills/scanning-for-xss-vulnerabilities and .opencode/skills/scanning-for-xss-vulnerabilities in your project.
SKILL.md names no scripts, command-line tools or credentials: Scanning For Xss Vulnerabilities is instructions for the agent only. Its frontmatter pre-approves these tools: Read, WebFetch, WebSearch, Grep. Compatibility (from SKILL.md): Designed for Claude Code.
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.
Scanning For Xss Vulnerabilities is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.
About 1.1k tokens (SKILL.md is roughly 4.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 17 tokens, read only when the agent opens those files.
Skills that share tags, products or a category with Scanning For Xss Vulnerabilities: Security And Hardening (penpot/penpot, 61k stars), Security Auditor (eigent-ai/eigent, 15k stars), Security Review (jewbetcha/opentrace, 116 stars) and Strix Code Vulnerability Scan (usestrix/strix, 68k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
jeremylongshore (a GitHub user) maintains it in jeremylongshore/tons-of-skills-marketplace, which has 2,827 GitHub stars. The repository holds 3,342 skills in this directory. The repository was last updated on October 10, 2026.
Source: jeremylongshore/tons-of-skills-marketplace on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.