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SkillNo. 01Hardens code against vulnerabilitiesSecurity and hardening
addyosmani/agent-skills · by addyosmaniHardens code against vulnerabilities. Use when auditing an input handler for vulnerabilities, when handling user input, authentication, data storage, or external integra…★ 98.7k GitHub starsFree
SkillNo. 02Discovers and invokes agent skillsUsing agent skillsaddyosmani/agent-skills · by addyosmaniDiscovers and invokes agent skills. Use when starting a session, or when you need to decide which skill or workflow applies to the piece of work at hand. This is the met…★ 98.7k GitHub starsFree
SkillNo. 03Conducts multi-axis code reviewCode review and qualityaddyosmani/agent-skills · by addyosmaniConducts multi-axis code review. Use before merging any change. Use when reviewing code written by yourself, another agent, or a human. Use when you need to assess code…★ 98.7k GitHub starsFreeSkillHardens code against vulnerabilitiesSecurity and hardeningaddyosmani/agent-skills · by addyosmaniHardens code against vulnerabilities. Use when auditing an input handler for vulnerabilities, when handling user input, authentication, data storage, or external integra…★ 98.7k GitHub starsFreeSkillDiscovers and invokes agent skillsUsing agent skillsaddyosmani/agent-skills · by addyosmaniDiscovers and invokes agent skills. Use when starting a session, or when you need to decide which skill or workflow applies to the piece of work at hand. This is the met…★ 98.7k GitHub starsFreeSkillConducts multi-axis code reviewCode review and qualityaddyosmani/agent-skills · by addyosmaniConducts multi-axis code review. Use before merging any change. Use when reviewing code written by yourself, another agent, or a human. Use when you need to assess code…★ 98.7k GitHub starsFree
SkillOptimizes application performance across frontend, backendPerformance optimizationaddyosmani/agent-skills · by addyosmaniOptimizes application performance across frontend, backend, queries, and databases. Use when performance requirements exist, when you suspect performance regressions, wh…★ 98.7k GitHub starsFree
SkillCreates specs before codingSpec driven developmentaddyosmani/agent-skills · by addyosmaniCreates specs before coding. Use when starting a new project, feature, or significant change and no specification exists yet. Use when drafting a PRD or requirements doc…★ 98.7k GitHub starsFree
SkillBuilds production-quality, accessibleFrontend UI engineeringaddyosmani/agent-skills · by addyosmaniBuilds production-quality, accessible, responsive user-facing UIs. Use when building or modifying interfaces and pages, creating components, implementing layouts, meetin…★ 98.7k GitHub starsFree
SkillPrepares production launchesShipping and launchaddyosmani/agent-skills · by addyosmaniPrepares production launches. Use when preparing to deploy to production, or when asking what needs to be in place before shipping. Use when you need a pre-launch checkl…★ 98.7k GitHub starsFree
SkillDelivers changes incrementally in thin, verifiable slicesIncremental implementationaddyosmani/agent-skills · by addyosmaniDelivers changes incrementally in thin, verifiable slices. Use when implementing any feature or change that touches more than one file, or when picking up the next task…★ 98.7k GitHub starsFree
SkillDrives development with tests using the red-green-refactorTest driven developmentaddyosmani/agent-skills · by addyosmaniDrives development with tests using the red-green-refactor loop. Use when implementing any logic, fixing any bug, or changing any behavior. Use when you need to prove th…★ 98.7k GitHub starsFree
SkillOptimizes agent context setupContext engineeringaddyosmani/agent-skills · by addyosmaniOptimizes agent context setup. Use when starting a new session, when agent output quality degrades, when switching between tasks, or when you need to configure rules fil…★ 98.7k GitHub starsFree
SkillBreaks work into ordered tasksPlanning and task breakdownaddyosmani/agent-skills · by addyosmaniBreaks work into ordered tasks. Use when you have a spec or clear requirements and need to break work into implementable tasks. Use when a task feels too large to start,…★ 98.7k GitHub starsFree
SkillGuides systematic root-cause debuggingDebugging and error recoveryaddyosmani/agent-skills · by addyosmaniGuides systematic root-cause debugging. Use when tests fail, builds break, something that worked yesterday broke, behavior doesn't match expectations, or you encounter a…★ 98.7k GitHub starsFree
SkillInstruments code so production behavior is visibleObservability and instrumentationaddyosmani/agent-skills · by addyosmaniInstruments code so production behavior is visible and diagnosable. Use when adding logging, metrics, tracing, or alerting. Use when shipping any feature that runs in pr…★ 98.7k GitHub starsFree
SkillStructures git workflow practicesGit workflow and versioningaddyosmani/agent-skills · by addyosmaniStructures git workflow practices. Use when making any code change. Use when committing, branching, resolving conflicts, splitting uncommitted work in a messy working tr…★ 98.7k GitHub starsFree
SkillGrounds every implementation decision in officialSource driven developmentaddyosmani/agent-skills · by addyosmaniGrounds every implementation decision in official documentation. Use when you want to verify an approach against the official docs before implementing it, or when you wa…★ 98.7k GitHub starsFree
SkillGuides stable API and interface designaddyosmani/agent-skills · by addyosmaniGuides stable API and interface design. Use when designing APIs, module boundaries, or any public interface. Use when creating REST or GraphQL endpoints, defining type c…★ 98.7k GitHub starsFree
SkillTests in real browsers via Chrome DevTools MCPBrowser testing with devtoolsaddyosmani/agent-skills · by addyosmaniTests in real browsers via Chrome DevTools MCP. Use when building or debugging anything that runs in a browser. Use when you need to inspect the DOM, capture console err…★ 98.7k GitHub starsFree
SkillRecords decisions and documentationDocumentation and adrsaddyosmani/agent-skills · by addyosmaniRecords decisions and documentation. Use when you need to document an architecture decision (ADR) or the reasoning behind a design choice, when changing public APIs, shi…★ 98.7k GitHub starsFree
SkillRefines raw ideas into sharpIdea refineaddyosmani/agent-skills · by addyosmaniRefines raw ideas into sharp, actionable concepts through structured divergent and convergent thinking. Use when an idea is still vague, when you need to stress-test ass…★ 98.7k GitHub starsFree
SkillExtracts what the user actually wants instead of what theyInterview meaddyosmani/agent-skills · by addyosmaniExtracts what the user actually wants instead of what they think they should want. Achieves this through one-question-at-a-time interview until ~95% confidence about the…★ 98.7k GitHub starsFree
SkillAutomates CI/CD pipeline setupCI/CD and Automationaddyosmani/agent-skills · by addyosmaniAutomates CI/CD pipeline setup. Use when setting up or modifying build and deployment pipelines. Use when you need to automate quality gates, configure test runners in C…★ 98.7k GitHub starsFree
SkillManages deprecation and migrationaddyosmani/agent-skills · by addyosmaniManages deprecation and migration. Use when removing old systems, APIs, or features. Use when migrating users from one implementation to another. Use when migrating a da…★ 98.7k GitHub starsFree
SkillSimplifies code for clarityCode simplificationaddyosmani/agent-skills · by addyosmaniSimplifies code for clarity. Use when refactoring code for clarity without changing behavior. Use when code works but is harder to read, maintain, or extend than it shou…★ 98.7k GitHub starsFree
SkillEstablishes a project's quality bar as a written contractConstraint driven developmentaddyosmani/agent-skills · by addyosmaniEstablishes a project's quality bar as a written contract and stops agents quietly lowering it. Interviews the user on which dimensions matter, supplies sane default thr…★ 98.7k GitHub starsFree
SkillSubjects every non-trivial decision to a fresh-contextDoubt driven developmentaddyosmani/agent-skills · by addyosmaniSubjects every non-trivial decision to a fresh-context adversarial review before it stands. Use when you want every assumption cross-examined before proceeding, when str…★ 98.7k GitHub starsFree
SkillOptimize web performance for faster loadingPerformance optimizationaddyosmani/web-quality-skills · by addyosmaniOptimize web performance for faster loading and better user experience. Use when asked to "speed up my site", "optimize performance", "reduce load time", "fix slow loadi…★ 2.8k GitHub starsFree
SkillAudit and improve web accessibility following WCAG 2.2Accessibility (a11y)addyosmani/web-quality-skills · by addyosmaniAudit and improve web accessibility following WCAG 2.2 guidelines. Use when asked to "improve accessibility", "a11y audit", "WCAG compliance", "screen reader support", "…★ 2.8k GitHub starsFree
SkillApply modern web development best practices for securityaddyosmani/web-quality-skills · by addyosmaniApply modern web development best practices for security, compatibility, and code quality. Use when asked to "apply best practices", "security audit", "modernize code",…★ 2.8k GitHub starsFree
SkillOptimize Core Web Vitals for better page experienceCore Web Vitals optimizationaddyosmani/web-quality-skills · by addyosmaniOptimize Core Web Vitals (LCP, INP, CLS) for better page experience using field and lab evidence. Use when asked to "improve Core Web Vitals", "fix LCP", "reduce CLS", "…★ 2.8k GitHub starsFree
SkillOptimize for search engine visibility and rankingSEO optimizationaddyosmani/web-quality-skills · by addyosmaniOptimize for search engine visibility and ranking. Use when asked to "improve SEO", "optimize for search", "fix meta tags", "add structured data", "sitemap optimization"…★ 2.8k GitHub starsFree
SkillRun an evidence-led web quality audit covering performanceaddyosmani/web-quality-skills · by addyosmaniRun an evidence-led web quality audit covering performance, accessibility, SEO, best practices, and agentic browsing. Use when asked to "audit my site", "review web qual…★ 2.8k GitHub starsFree