Agent skills you can check before you install
Public SKILL.md skills from GitHub repositories with 50+ stars and from the vendors themselves, scanned and scored. Install any of them with one command in Claude Code, Cursor, Codex, GitHub Copilot or Gemini CLI.
5,395 skills from 133 repositories · updated 2 minutes ago
5,394 skills
- pdfnexu-io/open-designExtract text, create PDFs, and handle forms. Useful for press releases, branded one-pagers, and printable design deliverables.DocumentsNo warnings★ 102.9K↓ —
- frontend-ui-engineeringaddyosmani/agent-skillsBuilds production-quality, accessible, responsive user-facing UIs. Use when building or modifying interfaces and pages, creating components, implementing layouts, meeting WCAG accessibility requirements, managing state, or when the output needs to look and feel production-quality rather than AI-generated.DesignNo warnings★ 109.1K↓ —
- ponytail-helpDietrichGebert/ponytailQuick reference for ponytail's modes, skills, and commands. One-shot display.OtherNo warnings★ 170.7K↓ —
- security-and-hardeningaddyosmani/agent-skillsHardens code against vulnerabilities. Use when auditing an input handler for vulnerabilities, when handling user input, authentication, data storage, or external integrations, or when checking a login flow is safe against the OWASP Top Ten. Use when building any feature that accepts untrusted data, manages user sessions, or interacts with third-party services. Use when auditing dependencies for known vulnerabilities, triaging package-manager audit findings, or assessing supply-chain risk in a new package. Use when personal data or privacy compliance (GDPR, CCPA) is involved.SecurityNo warnings★ 109.1K↓ —
- ponytailDietrichGebert/ponytailLazy senior dev mode: the smallest change that fully solves the task, and a reply a busy human understands in one read. Use on any coding task (writing, fixing, refactoring, reviewing, choosing dependencies) and when the user says "ponytail", "be lazy", "simplest solution", "yagni", or complains about over-engineering or bloat. Levels: lite, full (default), ultra.WritingNo warnings★ 170.7K↓ —
- ponytail-debtDietrichGebert/ponytailList every `shortcut:` comment (and older `ponytail:` ones) as a debt ledger. One-shot report, changes nothing. Use for "ponytail debt", "what did ponytail defer", "list the shortcuts", /ponytail-debt.OtherNo warnings★ 170.7K↓ —
- api-and-interface-designaddyosmani/agent-skillsGuides stable API and interface design. Use when designing APIs, module boundaries, or any public interface. Use when creating REST or GraphQL endpoints, defining type contracts between modules, or establishing boundaries between frontend and backend.DesignNo warnings★ 109.1K↓ —
- browser-testing-with-devtoolsaddyosmani/agent-skillsTests 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 errors, analyze network requests, profile performance, or verify visual output with real runtime data. Requires the chrome-devtools MCP server to be configured.TestingNo warnings★ 109.1K↓ —
- doubt-driven-developmentaddyosmani/agent-skillsSubjects every non-trivial decision to a fresh-context adversarial review before it stands. Use when you want every assumption cross-examined before proceeding, when stress-testing a plan for hidden failure modes, when correctness matters more than speed, when working in unfamiliar code, when stakes are high (production auth, security-sensitive logic, a high-stakes migration, irreversible operations), or any time a confident output would be cheaper to verify now than to debug later.SecurityNo warnings★ 109.1K↓ —
- ponytailDietrichGebert/ponytailLazy senior dev mode for any coding task: the smallest change that fully solves it, and a reply a busy human understands in one read.EngineeringNo warnings★ 170.7K↓ —
- ponytail-reviewDietrichGebert/ponytailQuality review of a change: is the logic right, is it safe, does it hold under real load, is risky code tested, is it fast enough, and is every line needed. Reads the connected code, not only the diff. Each finding is explained in plain English. Use for "review this", "code review", "review the last commit", "review my PR", "is this over-engineered", /ponytail-review.EngineeringNo warnings★ 170.7K↓ —
- git-workflow-and-versioningaddyosmani/agent-skillsStructures git workflow practices. Use when making any code change. Use when committing, branching, resolving conflicts, splitting uncommitted work in a messy working tree into clean atomic commits, opening or reviewing a pull request (PR), pushing to a remote, or when you need to organize work across multiple parallel streams. Use when cutting a release, choosing a semantic version bump, tagging, or writing a changelog.EngineeringNo warnings★ 109.1K↓ —
- ponytail-debtDietrichGebert/ponytailHarvest every shortcut: comment into one debt ledger, so deferrals get tracked instead of forgotten. One-shot report.OtherNo warnings★ 170.7K↓ —
- ponytail-gainDietrichGebert/ponytailShow ponytail measured impact as a scoreboard: less code, less cost, more speed, from the agentic benchmark averages. One-shot display.EngineeringNo warnings★ 170.7K↓ —
- ponytail-auditDietrichGebert/ponytailQuality audit of a whole repo: bugs, security holes, what breaks under real load, risky code without tests, slow paths, and what to delete, merge or split. Ranked, each finding explained in plain English. One-shot report, changes nothing. Use for "audit this codebase", "review the whole repo", "find bloat", "what can I delete", /ponytail-audit.SecurityNo warnings★ 170.7K↓ —
- ponytail-auditDietrichGebert/ponytailQuality audit of the whole repo: bugs, security, real load, missing tests, speed, and what to delete. Most important first.SecurityNo warnings★ 170.7K↓ —
- ponytail-helpDietrichGebert/ponytailQuick reference for ponytail levels, skills and commands. One-shot display. Use for /ponytail-help, "ponytail help", "how do I use ponytail".OtherNo warnings★ 170.7K↓ —
- ponytail-reviewDietrichGebert/ponytailQuality review of a diff: bugs, security, real load, missing tests, speed, and what to delete. Each finding says what goes wrong and how to fix it.EngineeringNo warnings★ 170.7K↓ —
- interview-meaddyosmani/agent-skillsExtracts 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 underlying intent. Use when an ask is underspecified ("build me X" without "for whom" or "why now"), when the user explicitly invokes ("interview me", "grill me", "are we sure?", "stress-test my thinking"), or when you catch yourself silently filling in ambiguous requirements before any plan, spec, or code exists.PlanningNo warnings★ 109.1K↓ —
- using-agent-skillsaddyosmani/agent-skillsDiscovers 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 meta-skill that governs how all other skills are discovered and invoked.ProductivityNo warnings★ 109.1K↓ —
- code-simplificationaddyosmani/agent-skillsSimplifies 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 should be. Use when reviewing code that has accumulated unnecessary complexity.EngineeringNo warnings★ 109.1K↓ —
- context-engineeringaddyosmani/agent-skillsOptimizes 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 files and context for a project.ProductivityNo warnings★ 109.1K↓ —
- ponytail-gainDietrichGebert/ponytailShow ponytail's measured savings (code, cost, speed) from the benchmark. One-shot display. Use for /ponytail-gain, "what does ponytail save", "ponytail impact".EngineeringNo warnings★ 170.7K↓ —
- docnexu-io/open-designRead, create, and edit .docx documents with formatting and layout fidelity via OpenAI's document skill.DocumentsNo warnings★ 102.9K↓ —
performance-optimization
addyosmani/agent-skills
DesignUpdated Oct 13, 2026
From the author
Optimizes application performance across frontend, backend, queries, and databases. Use when performance requirements exist, when you suspect performance regressions, when Core Web Vitals or load times need improvement, when N+1 query patterns need fixing, or when profiling reveals bottlenecks.
Install
npx skills add addyosmani/agent-skills --skill performance-optimization -a claude-code
Installs to .claude/skills/performance-optimization/ · Each command fetches the skill straight from GitHub with the open skills CLI.
Download .zip
Byte-identical to the scanned commit, with the repository’s licence and a SOURCE.txt.
What it can touch
Instructions onlyUses the networkLicence: MIT
Safety checks on SKILL.md
No warnings.
Why 96
Security100
Provenance95
Maintenance100
Licence100
Adoption77
Files (2)
- SKILL.md
- references/optimization-patterns.md