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.
46,700 skills from 2,243 repositories · updated 5 hours ago
3,310 skills
- cm-browsetody-agent/codymasterUse when you need visual QA, screenshots, or post-deploy smoke testing through a real browser with Playwright.TestingNo warnings★ 55↓ —
- debugging-testingTibsfox/gsd-skill-creatorUse when the user reports a bug they can't reproduce, asks where to start debugging, or mentions a Heisenbug / production-only failure. Drives the observe→hypothesize→predict→test→iterate scientific method.TestingNo warnings★ 71↓ —
- mathematical-modelingTibsfox/gsd-skill-creatorReal-world problem formulation, mathematical abstraction, and applied mathematics for translating between practical problems and mathematical frameworks. Covers the modeling cycle (problem identification, assumptions, formulation, analysis, validation, interpretation), Polya's framework adapted for modeling, common model types (linear, exponential, logistic, periodic, power-law), dimensional analysis (Buckingham Pi theorem), optimization (linear programming, gradient descent, constraint satisfaction), probability models (Markov chains, queuing theory, Monte Carlo simulation), statistical modeling (regression, hypothesis testing, model selection), model criticism (overfitting, underfitting, sensitivity analysis), and real-world case studies. Use when formulating mathematical models, performing dimensional analysis, optimizing systems, running simulations, or evaluating model validity.TestingNo warnings★ 71↓ —
- cm-browsetody-agent/codymasterUse when you need visual QA, screenshots, or post-deploy smoke testing through a real browser with Playwright.TestingNo warnings★ 55↓ —
- cm-tddtody-agent/codymasterUse when implementing any feature or bugfix, before writing implementation codeTestingNo warnings★ 55↓ —
- cm-browsetody-agent/codymasterUse when you need visual QA, screenshots, or post-deploy smoke testing through a real browser with Playwright.TestingNo warnings★ 55↓ —
- cm-tddtody-agent/codymasterUse when implementing any feature or bugfix, before writing implementation codeTestingNo warnings★ 55↓ —
- pair-trade-screenernicepkg/ai-workflowStatistical arbitrage tool for identifying and analyzing pair trading opportunities. Detects cointegrated stock pairs within sectors, analyzes spread behavior, calculates z-scores, and provides entry/exit recommendations for market-neutral strategies. Use when user requests pair trading opportunities, statistical arbitrage screening, mean-reversion strategies, or market-neutral portfolio construction. Supports correlation analysis, cointegration testing, and spread backtesting.TestingNo warnings★ 288↓ —Also in 1 other repo
- testserpro69/claude-toolboxGuidelines describing how to test the code. Use whenever writing new or updating existing code, for example after implementing a new feature or fixing a bug.TestingNo warnings★ 152↓ —
- webapp-testingNickCrew/Claude-CortexToolkit for interacting with and testing local web applications using Playwright. Use when verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs.TestingNo warnings★ 62↓ —
- shipping-changestelagod/code-abyssEnd-to-end change-shipping closed loop for non-trivial work — research → proposal doc → phased guarded implementation → PR self-review → harden → merge. Use when taking a substantial change from idea to merged PR, when a task needs a written proposal before code, when implementing in reversible phases behind a guarded commit chain (assert + test + verify, all green before commit), or when self-reviewing your own PR. Complements automating-devops (which is the git/CI/release knowledge reference); this skill is the orchestration spine that sequences a change from zero to merged.TestingReview first★ 244↓ —
- cm-browsetody-agent/codymasterUse when you need visual QA, screenshots, or post-deploy smoke testing through a real browser with Playwright.TestingNo warnings★ 55↓ —
- ethics-governanceTibsfox/gsd-skill-creatorBias detection and mitigation, fairness metrics, privacy frameworks, consent models, transparency requirements, and accountability structures for data science practice. Covers algorithmic bias sources, disparate impact testing, differential privacy, GDPR principles, model cards, datasheets for datasets, responsible AI frameworks, and the organizational governance needed to make ethics actionable. Use when auditing models for bias, designing privacy-preserving systems, establishing governance processes, or evaluating the social impact of data-driven decisions.TestingNo warnings★ 71↓ —
- crabbox-setupAI-Builder-Club/skillsScaffold an isolated CLOUD dev box per agent (via crabbox + Daytona) for any codebase — the parallel-safe counterpart to dev-local-setup. Each agent gets its own full stack (own DB + dev server) and an in-box browser for e2e, so concurrent loops never collide on ports/state. Sets up the snapshot image, .crabbox.yaml, an idempotent setup.sh (also boots the stack locally), and a cbx.sh wrapper. Use when the user says "set up crabbox", "give each agent its own box", "add cloud testing", "make this repo testable in the cloud / on Daytona", "parallel-test this", or when setup-codebase-harness needs true per-agent isolation.TestingNo warnings★ 1.3K↓ —
- skill-testerpskoett/pskoett-ai-skillsValidates all interactive skills in this repo against the Agent Skills spec, project conventions, and structural requirements. Runs quick_validate.py, checks line limits, verifies cross-references, and tests hook scripts. Use when skills have been added or modified and you want to verify everything passes before committing or submitting.TestingNo warnings★ 324↓ —
- self-healingpskoett/pskoett-ai-skillsActive runtime recovery for coding agents: when something breaks mid-task, diagnose the root cause, write a fix, VERIFY by re-running the broken thing, then file a `HEAL-` entry to `.learnings/HEALS.md` with proof. Use whenever a command, test, build, or lint fails or exits non-zero; on missing tooling, dependency/lockfile mismatch, wrong runtime version, venv or permission errors, port conflicts, dirty git state, or a missing `.env`; when the agent needs a helper or one-off script that doesn't exist yet; when an external API, tool, or MCP errors or rate-limits; or when a test flakes. Search `HEALS.md` by `Pattern-Key` first — most heals are recurrences, so increment `Recurrence-Count` instead of duplicating. Verify is mandatory: mark `pending-verify` honestly if sandboxed, `abandoned` if the fix can't be made to work. Pairs with `self-improvement` (which promotes recurring heals to durable memory) but owns the verify-before-persist discipline self-improvement doesn't.TestingNo warnings★ 324↓ —Also in 1 other repo
- optimizemarketcalls/vectorbt-backtesting-skillsOptimize strategy parameters using VectorBT. Tests parameter combinations and generates heatmaps.TestingNo warnings★ 211↓ —
- cm-test-gatetody-agent/codymaster[Deprecated] quality gate now covers tests + canary. Use `cm-quality-gate` instead.TestingNo warnings★ 55↓ —
- cm-browsetody-agent/codymasterUse when you need visual QA, screenshots, or post-deploy smoke testing through a real browser with Playwright.TestingNo warnings★ 55↓ —
- cm-browsetody-agent/codymasterUse when you need visual QA, screenshots, or post-deploy smoke testing through a real browser with Playwright.TestingNo warnings★ 55↓ —
- cm-browsetody-agent/codymasterUse when you need visual QA, screenshots, or post-deploy smoke testing through a real browser with Playwright.TestingNo warnings★ 55↓ —
- cm-test-gatetody-agent/codymaster[Deprecated] quality gate now covers tests + canary. Use `cm-quality-gate` instead.TestingNo warnings★ 55↓ —
- cm-test-gatetody-agent/codymaster[Deprecated] quality gate now covers tests + canary. Use `cm-quality-gate` instead.TestingNo warnings★ 55↓ —
- cm-test-gatetody-agent/codymaster[Deprecated] quality gate now covers tests + canary. Use `cm-quality-gate` instead.TestingNo warnings★ 55↓ —