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.
49,396 skills from 2,375 repositories · updated 39 minutes ago
48,348 skills
- ab-test-setupalirezarezvani/claude-skillsUse before planning or launching any A/B, split or multivariate test, or when asked if a result is significant. Sizes the test with sample_size_calculator.py and writes the hypothesis, metric and stop rule first, so it is not called early on noise.TestingNo warnings★ 29.2K↓ —
- ui-design-systemalirezarezvani/claude-skillsUse when building a design system: tokens, component docs, responsive scales or developer handoff. Generates tokens with design_token_generator.py.DesignNo warnings★ 29.2K↓ —
- research-market-edge-casesgooseworks-ai/goose-skillsStep of the research-market playbook: rules for run edge cases such as no browser, stalled workers, earlier reports and late reads. Run research-market instead; not for direct use.ScienceNo warnings★ 1.3K↓ —
- database-designeralirezarezvani/claude-skillsUse when designing a database schema, choosing SQL vs NoSQL, modeling relationships or planning a data migration, before writing DDL. Applies normalization, index strategy and a database selection decision tree.DataNo warnings★ 29.2K↓ —
- canonical-tagkostja94/marketing-skillsAudit and fix duplicate-page canonicalization across protocol, host, slash, default-document, extension, case, and tracking-parameter URL variants. Use for canonical URLs, duplicate content, preferred URLs, URL consolidation, or conflicting canonical signals. For URL naming and hierarchy design, use url-structure.DesignNo warnings★ 1.1K↓ —
- vitestjezweb/claude-skillsSet up Vitest testing in any project — detects type (Cloudflare Workers, React, Node, library), generates vitest.config.ts, test setup, utilities, and a sample test. Covers mocking patterns, coverage config, workspace setup, Jest migration. Use whenever the user mentions adding tests, setting up Vitest, configuring tests, migrating from Jest, fixing testing infrastructure, or asks 'how do I test this'.TestingNo warnings★ 1.1K↓ —
- runbook-generatoralirezarezvani/claude-skillsUse when a service needs runbooks for deploy, incident response, maintenance or rollback, before launch. Generates them per environment with runbook_generator.py.DevOpsNo warnings★ 29.2K↓ —
- uk-business-englishjezweb/claude-skillsBritish business English writing style for professional communications — polished, understated, EN-GB spelling (colour, organise, centre). Use whenever the user is writing for a British audience: emails, chat messages, proposals, client communications, blog posts, web copy, or any business writing. Apply to drafting, editing, and tone-checking professional text.WritingNo warnings★ 1.1K↓ —
- braindumphuytieu/COG-second-brainQuick capture of raw thoughts with intelligent domain classification and competitive intelligence extractionOtherNo warnings★ 1.3K↓ —
- research-competitors-edge-casesgooseworks-ai/goose-skillsStep of the research-competitors playbook: rules for run edge cases such as no browser, stalled workers, earlier reports and late reads. Run research-competitors instead; not for direct use.ScienceNo warnings★ 1.3K↓ —
- agenthubalirezarezvani/claude-skillsUse when a task should be attempted by several agents in parallel and the best result kept (code speed, copy variants, research angles). Spawns N agents in git worktrees, ranks results by metric or judge with result_ranker.py and merges the winner.ScienceNo warnings★ 29.2K↓ —
- sfxmintNewhashgraph-online/awesome-codex-pluginsAdd free CC0 sound effects to a web app or game without an API key, using the SFXMint API (sound roles, sets grouped by event, search) and permanent hotlinkable MP3/WAV URLs. With an SFXMint API key it can also generate a sound the library lacks. Use when the user asks to add sounds, audio feedback or UI sounds to an app, wants click / notification / success / error / alert sounds, game sound effects (coin, jump, hit, explosion, power-up, game over), ambience (rain, forest, drone), sound on a code-driven video or animation (Remotion, motion graphics), or asks where to get free sound effects for an app, game, video, prototype or demo. Not for music, voice or speech.DesignNo warnings★ 1.5K↓ —
- nz-business-englishjezweb/claude-skillsNew Zealand business English writing style for professional communications — warm, inclusive, EN-NZ spelling (colour, organise, centre). Use whenever the user is writing for a New Zealand audience: emails, chat messages, proposals, client communications, blog posts, web copy, or any business writing. Apply to drafting, editing, and tone-checking professional text.WritingNo warnings★ 1.1K↓ —
- dbt-model-specmohitagw15856/pm-claude-skillsSpec a dbt model — its grain, sources, transformations, tests, and materialization. Use when asked to design a dbt model, plan a data transformation, write a staging/intermediate/mart model spec, or define dbt tests for a table. Produces a model spec — purpose & grain, lineage (sources → refs), the transformation logic, column definitions, dbt tests, materialization choice, and the skeleton SQL/YAML.DataNo warnings★ 1.5K↓ —
- email-lifecycle-lifecycle-auditgooseworks-ai/goose-skillsStep of the email-lifecycle playbook: audits list, consent, live flows, recent sends and sending setup, marking every item verified, from-you or unknown. Run email-lifecycle instead; not for direct use.ProductivityNo warnings★ 1.3K↓ —
- macboxNewhashgraph-online/awesome-codex-pluginsBuild, test, run, and tap through native iOS apps on a real remote Mac. Use for iOS build, test, and simulator work when this machine can't run Xcode, or when CLAUDE.md or AGENTS.md says to use macbox.TestingNo warnings★ 1.5K↓ —
- harvesthuytieu/COG-second-brainCapture durable session learnings, stage for human promotion to 05-knowledge/lizard, and propose skill/CLAUDE.md patches. Triggered by /harvest, SessionEnd hook staging, or nightly enhance. Never writes durable knowledge without your approval.WritingNo warnings★ 1.3K↓ —
- memory-hygienehuytieu/COG-second-brainPeriodic trust sweep of persistent memory and durable knowledge notes - re-verifies environment-dependent claims against the live environment, stamps last_verified + confidence, and proposes archiving drifted entriesProductivityNo warnings★ 1.3K↓ —Also in 1 other repo
- gtm-strategykostja94/marketing-skillsWhen the user wants to plan go-to-market strategy, GTM framework, or market entry. Also use when the user mentions "GTM," "go-to-market," "market entry," "new market," "repositioning," "PLG," "sales-led," "product-led," "marketing-led," "ICP," "buyer persona," "GTM motion," or "market expansion." For launch checklist, use product-launch.MarketingNo warnings★ 1.1K↓ —
- ergonomicshashgraph-online/awesome-codex-pluginsAudit CLI, API, MCP or SDK discovery, first use and error recovery. Use when: designing an agent-facing tool or investigating misuse, including one command.FinanceNo warnings★ 1.5K↓ —Also in 2 other repos
- ai-code-reviewmohitagw15856/pm-claude-skillsReview AI-authored code for its characteristic failure modes — plausible-but-wrong logic, hallucinated APIs, over-engineering, dead scaffolding, and silent security shortcuts. Use when reviewing an AI-generated or heavily AI-assisted PR, when AI-written code keeps shipping subtle bugs, or when setting review standards for a team using coding agents. Produces a focused review with AI-specific findings, verification steps per risk class, and a team checklist for AI-authored changes. For general PR review use code-review-checklist — this skill covers what that one assumes a human wouldn't do.EngineeringNo warnings★ 1.5K↓ —
- research-audiencegooseworks-ai/goose-skillsAudience research: who the buyers are, in their own words, where they gather and how to reach them — plus named prospect lists when asked. Use when the marketer says "research our audience", "who should we target", "mine our reviews", "why do people buy us or leave", "where does our audience hang out"; or for lists: "find 50 right-fit leads with emails", "find retailers or accounts to pitch", "score these leads / who do we call first", "who's looking for an alternative to X", "tell me when a past champion changes jobs". Reads the brand's own customer data first and delivers a readable report saved to the brand. Never contacts anyone. Not for market size or trends — use research-market; not for writing the messages — use write-outreach.ScienceNo warnings★ 1.3K↓ —
- iamitsmostafa/aws-agent-skillsAWS Identity and Access Management for users, roles, policies, and permissions. Use when creating IAM policies, configuring cross-account access, setting up service roles, troubleshooting permission errors, or managing access control.DevOpsNo warnings★ 1.2K↓ —
- ad-campaign-analyzergooseworks-ai/goose-skillsAnalyze ad campaign performance data (Google, Meta, LinkedIn) to identify what's working, what's wasting budget, and specific cut/scale/test recommendations. Runs statistical analysis, funnel diagnostics, and multi-channel budget reallocation with specific dollar-amount shift recommendations and scenario modeling.MarketingNo warnings★ 1.3K↓ —
update-cog
huytieu/COG-second-brain
OtherUpdated Oct 23, 2026
From the author
Check for and apply upstream COG framework updates (skills, docs, scripts) without touching personal content
Install
npx skills add huytieu/COG-second-brain --skill update-cog -a claude-code
Installs to .claude/skills/update-cog/ · 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 onlyNo network use seenLicence: MIT
Safety checks on SKILL.md
No warnings.
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- SKILL.md