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Found 9,307 Skills
Build a structured taxonomy of failure modes from open-coded trace annotations. Use this skill whenever the user has freeform annotations from reviewing LLM traces and wants to cluster them into a coherent, non-overlapping set of binary failure categories (axial coding). Also use when the user mentions "failure modes", "error taxonomy", "axial coding", "cluster annotations", "categorize errors", "failure analysis", or wants to go from raw observation notes to structured evaluation criteria. This skill covers the full pipeline: grouping open codes, defining failure modes, re-labeling traces, and quantifying error rates.
Develop custom WebF native plugins based on Flutter packages. Create reusable plugins that wrap Flutter/platform capabilities as JavaScript APIs. Use when building plugins for native features like camera, payments, sensors, file access, or wrapping existing Flutter packages.
Comprehensive iOS development skill for Apple's ProximityReader framework. Covers Tap to Pay on iPhone (payment card reading), loyalty card (VAS) integration, Store and Forward mode, the Verifier API (mobile document / ID reading), and merchant discovery UI. Use this skill whenever the user mentions ProximityReader, Tap to Pay on iPhone, contactless payments on iPhone, NFC payment reading, loyalty card reading from Wallet, VAS requests, mobile driver's license verification, ID verification on iPhone, MobileDocumentReader, PaymentCardReader, PaymentCardReaderSession, or any related topic. Also trigger when the user wants to build a point-of-sale (POS) app, accept contactless payments without hardware, or read digital wallet passes on iPhone.
Frontend interviewer from top internet companies, conducts step-by-step technical questions from shallow to deep based on project or work experience in resumes, and provides real-time feedback and improvement suggestions. Use when: (1) Users request frontend interview simulation, (2) Need in-depth technical exploration of frontend projects/work experience in resumes, (3) Users provide resume content and want to practice interviews, (4) Need to assess frontend technical depth and comprehension ability, (5) Want to obtain interview expression skills and improvement suggestions.
Compose new Rails backend pages and refactor existing Rails UI to use premium blocks from templates/application-ui. Use when requests mention ERB views, Rails partials, admin/dashboard screens, Tailwind UI assembly, or replacing custom markup with existing premium blocks while preserving behavior, accessibility, and Turbo/Stimulus hooks.
Security vulnerability scanner and OWASP compliance auditor for codebases. Dependency scanning (npm audit, pip-audit), secret detection (high-entropy strings, API keys), SAST for injection/XSS vulnerabilities, and security posture reports. Activate on 'security audit', 'vulnerability scan', 'OWASP', 'secret detection', 'dependency check', 'CVE', 'security review', 'penetration testing prep'. NOT for runtime WAF configuration (use infrastructure tools), network security/firewalls, or compliance certifications like SOC2/HIPAA (legal/organizational).
Guides "ship or iterate?" decisions using Shreyas Doshi's frameworks, Marty Cagan's shipping philosophy, and Tobi Lutke's reversible decision-making. Use when deciding if feature is ready, preventing perfectionism paralysis, applying one-way vs two-way door thinking, or balancing technical debt vs shipping speed.
Discover genes associated with diseases and traits using GWAS data from the GWAS Catalog (500,000+ associations) and Open Targets Genetics (L2G predictions). Identifies genetic risk factors, prioritizes causal genes via locus-to-gene scoring, and assesses druggability. Use when asked to find genes associated with a disease or trait, discover genetic risk factors, translate GWAS signals to gene targets, or answer questions like "What genes are associated with type 2 diabetes?"
Authorization policies for resource access control. Use when working with authorization, permissions, access control, or when user mentions policies, authorization, permissions, can, ability checks.
This skill guides writing of new Ruby code following modern Ruby 3.x syntax, Sandi Metz's 4 Rules for Developers, and idiomatic Ruby best practices. Use when creating new Ruby files, writing Ruby methods, or refactoring Ruby code to ensure adherence to clarity, simplicity, and maintainability standards.
Guide for creating and reviewing skills. This skill should be used when users want to create a new skill, review an existing skill for quality, or optimize a skill that extends Claude's capabilities with specialized knowledge, workflows, or tool integrations.
Ethereum Layer 2 landscape — Arbitrum, Optimism, Base, zkSync, Scroll, Unichain, Celo, and more. How they work, how to deploy on them, how to bridge, when to use which. Includes per-chain DeFi ecosystems and critical corrections. Use when choosing an L2, deploying cross-chain, or when a user asks about Ethereum scaling.