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Found 2,139 Skills
Mutation-driven test vector generation. Finds implementations of a cryptographic algorithm or protocol, runs mutation testing to identify escaped mutants, then generates new test vectors that deliberately exercise the uncovered code paths. Compares before/after mutation kill rates to prove vector effectiveness. Use when generating cryptographic test vectors, measuring Wycheproof coverage gaps, finding escaped mutants via mutation testing, creating cross-implementation test suites, or improving test vector coverage for crypto primitives.
Hypothesis → Prediction → Test → Revise with explicit falsification. Use for debugging, feature experimentation, performance investigation, and A/B testing design.
Ruby development guidelines covering idiomatic code style, Ruby 3.x features, testing with RSpec, and best practices for building maintainable Ruby applications.
Safe, verified refactoring with regression testing at each step. Identify targets, plan transformation, execute incrementally. Triggers: "refactor", "restructure", "extract", "rename", "move", "simplify", "reduce complexity", "clean up", "decompose".
Reads documented bugs from bugs.md, analyzes root causes, implements fixes with regression tests, and validates the full test suite. Prioritizes fixes by severity (high to low). Updates bugs.md with correction status and generates a final bugfix report. Use when the user asks to fix bugs, resolve issues, or run the bugfix workflow for a feature. Do not use for new feature implementation, code review, or QA testing.
When the user wants help writing, improving, or auditing Google Ads ad copy — RSA headlines, descriptions, headline frameworks, value propositions, CTAs, ad copy testing strategy, or matching copy to search intent. Triggers on 'write ad copy', 'headline ideas', 'RSA headlines', 'ad copy', 'improve my ads', 'ad copy audit', 'write better ads', 'headline frameworks', 'description copy', 'ad relevance', 'CTA copy', 'value proposition in ads', or 'ad copy for [campaign type]'. For RSA structure and technical setup see google-ads-search. For testing ad copy variations see google-ads-experiments.
Comprehensive Drupal patterns from "Drupal at Your Fingertips" by Selwyn Polit. Covers 50+ topics including services, hooks, forms, entities, caching, testing, and more.
Guide users through TDD and TCRDD (Test && Commit || Revert + Test Driven Development). Use this skill whenever a user mentions TDD, test-driven development, writing tests before code, red-green-refactor cycles, or unit testing workflows. Also trigger when a user asks about TCRDD, TCR, "test commit revert", "git gamble", or wants a strict TDD workflow with automatic commits and reverts. Trigger when the user asks to implement a feature, fix a bug, or write a class/function and mentions tests, TDD, or "test first". If the user shares code and asks for a review with any testing angle, consult this skill.
Craft CMS 5 plugin and module development — extending Craft. Covers the full extend surface: elements, element queries, services, models, records, project config, controllers, CP templates, migrations, queue jobs, console commands, field types, native fields, events, behaviors, Twig extensions, utilities, widgets, filesystems, debugging, testing, and GraphQL. Triggers on: beforePrepare(), afterSave(), defineSources(), defineTableAttributes(), attributeHtml(), MemoizableArray, getConfig(), handleChanged, $allowAnonymous, $enableCsrfValidation, BaseNativeField, EVENT_DEFINE_NATIVE_FIELDS, FieldLayoutBehavior, EVENT_REGISTER, EVENT_DEFINE, EVENT_BEFORE, EVENT_AFTER, CraftVariable, registerTwigExtension, DefineConsoleActionsEvent, PHPStan, Pest. Always use when writing, editing, or reviewing any Craft CMS plugin or module code.
Use when working on Hono projects or adding Hono into a codebase. Enforces Hono architecture rules for app composition, route modules, middleware, validation, error handling, testing, and typed RPC boundaries before any code change.
Reference skill for Zoom Probe SDK. Use after routing to a preflight workflow when testing browser compatibility, media permissions, audio or video diagnostics, and network readiness before users join.
Use when writing, reviewing, or debugging pure Ruby code — idiomatic patterns, modern 3.x+ features (pattern matching, Data.define, endless methods), error handling conventions (raise vs fail, result objects), memoization, and performance idioms. For Rails use rails-guides. For testing use minitest. For code style use sandi-metz-rules.