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Featured skills

Install our featured skills or any skill from GitHub with Tessl package manager.

82%

anthropics/skills

mcp-builder

Guide for creating high-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external services through well-designed tools. Use when building MCP servers to integrate external APIs or services, whether in Python (FastMCP) or Node/TypeScript (MCP SDK).

Top performing skills & tiles

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Tessl analyses skills and tiles for their impact on agent success.

58%

conducting-chaos-engineering

This skill enables Claude to design and execute chaos engineering experiments to test system resilience. It is used when the user requests help with failure injection, latency simulation, resource exhaustion testing, or resilience validation. The skill is triggered by discussions of chaos experiments (GameDays), failure injection strategies, resilience testing, and validation of recovery mechanisms like circuit breakers and retry logic. It leverages tools like Chaos Mesh, Gremlin, Toxiproxy, and AWS FIS to simulate real-world failures and assess system behavior.

SKILL

58%

conducting-browser-compatibility-tests

This skill enables cross-browser compatibility testing for web applications using BrowserStack, Selenium Grid, or Playwright. It tests across Chrome, Firefox, Safari, and Edge, identifying browser-specific bugs and ensuring consistent functionality. It is used when a user requests to "test browser compatibility", "run cross-browser tests", or uses the `/browser-test` or `/bt` command to assess web application behavior across different browsers and devices. The skill generates a report detailing compatibility issues and screenshots for visual verification. Activates when you request "conducting browser compatibility tests" functionality.

SKILL

58%

scanning-for-accessibility-issues

This skill enables Claude to perform comprehensive accessibility audits. It uses the accessibility-test-scanner plugin to identify WCAG 2.1/2.2 compliance issues, validate ARIA attributes, check keyboard navigation, and assess screen reader compatibility. Use this skill when the user requests an accessibility scan, audit, or compliance check, or when terms like "WCAG", "ARIA", "screen reader", "accessibility testing", or "a11y" are mentioned. It provides actionable insights for improving web application accessibility.

SKILL

58%

scanning-for-xss-vulnerabilities

This skill enables Claude 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 reflected, stored, and DOM-based XSS vulnerabilities. It analyzes HTML, JavaScript, CSS, and URL contexts to detect potential exploits and suggests safe proof-of-concept payloads. This skill is best used during code review, security audits, and before deploying web applications to production.

SKILL

58%

scanning-for-vulnerabilities

This skill enables comprehensive vulnerability scanning using the vulnerability-scanner plugin. It identifies security vulnerabilities in code, dependencies, and configurations, including CVE detection. Use this skill when the user asks to scan for vulnerabilities, security issues, or CVEs in their project. Trigger phrases include "scan for vulnerabilities", "find security issues", "check for CVEs", "/scan", or "/vuln". The plugin performs static analysis, dependency checking, and configuration analysis to provide a detailed vulnerability report.

SKILL

58%

detecting-sql-injection-vulnerabilities

This skill enables Claude to detect SQL injection vulnerabilities in code. It uses the sql-injection-detector plugin to analyze codebases, identify potential SQL injection flaws, and provide remediation guidance. Use this skill when the user asks to find SQL injection vulnerabilities, scan for SQL injection, or check code for SQL injection risks. The skill is triggered by phrases like "detect SQL injection", "scan for SQLi", or "check for SQL injection vulnerabilities".

SKILL

58%

analyzing-security-headers

This skill analyzes HTTP security headers of a given domain to identify potential vulnerabilities and misconfigurations. It provides a detailed report with a grade, score, and recommendations for improvement. Use this skill when the user asks to "analyze security headers", "check HTTP security", "scan for security vulnerabilities", or requests a "security audit" of a website. It will automatically activate when security-related keywords are used in conjunction with domain names or URLs.

SKILL

58%

scanning-for-data-privacy-issues

This skill enables Claude to automatically scan code and configuration files for potential data privacy vulnerabilities using the data-privacy-scanner plugin. It identifies sensitive data exposure, compliance violations, and other privacy-related risks. Use this skill when the user requests to "scan for data privacy issues", "check privacy compliance", "find PII leaks", "identify GDPR violations", or needs a "privacy audit" of their codebase. The skill is most effective when used on projects involving personal data, financial information, or health records.

SKILL

58%

validating-authentication-implementations

This skill enables Claude to validate authentication implementations against security best practices and industry standards. It analyzes various authentication methods, including JWT, OAuth, session-based authentication, and API keys. Use this skill when you need to perform an authentication security check, assess password policies, evaluate MFA implementation, or analyze session security. Trigger this skill with phrases like "validate authentication," "authentication check," or "authcheck."

SKILL

58%

auditing-access-control

This skill enables Claude to audit access control implementations in various systems. It uses the access-control-auditor plugin to identify potential vulnerabilities and misconfigurations related to access control. Use this skill when the user asks to "audit access control", "check permissions", "assess access rights", or requests a "security review" focused on access management. It's particularly useful for analyzing IAM policies, ACLs, and other access control mechanisms in cloud environments, applications, or infrastructure. The skill helps ensure compliance with security best practices and identify potential privilege escalation paths.

SKILL

58%

setting-up-synthetic-monitoring

This skill automates the setup of synthetic monitoring for applications. It allows Claude to proactively track performance and availability by configuring uptime, transaction, and API monitoring. Use this skill when the user requests to "set up synthetic monitoring", "configure uptime monitoring", "track application performance", or needs help with "proactive performance tracking". The skill helps to identify critical endpoints and user journeys, design monitoring scenarios, and configure alerts and dashboards.

SKILL

58%

tracking-application-response-times

This skill enables Claude to track and optimize application response times. It uses the response-time-tracker plugin to monitor API endpoints, database queries, external service calls, frontend rendering, and background job execution. The plugin calculates P50, P95, and P99 percentiles, average and maximum response times. Use this skill when you need to identify performance bottlenecks, monitor SLOs, or receive alerts about performance degradation. Trigger this skill with phrases like "track response times", "optimize latency", or "monitor application performance".

SKILL

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