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stonybrooknlp-appworld

🌍 AppWorld: A Controllable World of Apps and People for Benchmarking Function Calling and Interactive Coding Agent, ACL'24 Best Resource Paper.

Contributed by Sentinel

web-assets-generator-skill

Easily generate web assets from Claude Code including favicons, app icons (PWA), and social media meta images (Open Graph) for Facebook, Twitter, WhatsApp, and LinkedIn. Handles image resizing, text-to-image generation, emojis, and provides proper HTML meta tags.

superdesign-skill

The design skill for Claude Code, Cursor and any coding agent. Stop shipping AI-slop UI: turn it into shippable, tasteful frontend. Install: npx skills add superdesigndev/superdesign-skill. Powered by superdesign.dev

Contributed by Sentinel

continuous-eval

Relari's modular evaluation library for LLM pipelines with deterministic + LLM-based metrics for RAG and agent workflows.

cc-devops-skills

Skills for DevOps work that generate and validate infrastructure-as-code with shell scripts and CLI tools, for most deployment platforms. Also useful as documentation.

metr-task-standard

METR's Task Standard: a specification and scaffold for creating agentic tasks used in autonomous agent capability evaluations.

harbor-framework-terminal-bench-2-1

Terminal-Bench 2.1

Contributed by Sentinel

claude-code-agents

Comprehensive E2E development workflow with helpful Claude Code subagent prompts for solo devs. Run multiple auditors in parallel, automate fix cycles with micro-checkpoint protocols, and do browser-based QA. Includes strict protocols to prevent AI going rogue.

book-factory

A comprehensive pipeline of Skills that replicates traditional publishing infrastructure for nonfiction book creation using specialized Claude skills.

vellum-evals

Vellum evaluation SDK for running LLM test suites with custom metrics, dataset pinning, and CI workflow integration.

braintrust

Developer platform for logging, evaluating, and comparing LLM experiments with dataset versioning and scoring functions.

galileo-evaluate

Galileo evaluation and observability SDK for detecting hallucinations, data errors, and model weaknesses in LLM pipelines.

claude-mountaineering-skills

Claude Code skill that automates mountain route research for North American peaks. Aggregates data from 10+ mountaineering sources like Mountaineers.org, PeakBagger.com and SummitPost.com to generate detailed route beta reports with weather, avalanche conditions, and trip reports.

humanloop-evals

Humanloop Python SDK with integrated evals, dataset versioning, and human + LLM judge scoring for production pipelines.

read-only-postgres

Read-only PostgreSQL query skill for Claude Code. Executes SELECT/SHOW/EXPLAIN/WITH queries across configured databases with strict validation, timeouts, and row limits. Supports multiple connections with descriptions for database selection.

agentbench

Use to put a number on harness quality: run an agent harness against a task set and get a score, so harness changes are validated by evidence. It is the eval backbone of a self-improving loop.

2d-games

2D game development principles. Sprites, tilemaps, physics, camera.

3d-artist

3D art and asset creation specialist for game development. Use PROACTIVELY for 3D modeling, texturing, animation, asset optimization, and technical art workflows for Unity and Unreal Engine.

3d-games

3D game development principles. Rendering, shaders, physics, cameras.

3d-web-experience

Expert in building 3D experiences for the web - Three.js, React Three Fiber, Spline, WebGL, and interactive 3D scenes. Covers product configurators, 3D portfolios, immersive websites, and bringing depth to web experiences. Use when: 3D website, three.js, WebGL, react three fiber, 3D experience.

4-1-beast

An agent definition that sets GPT-4.1 up as a coding agent.

a11y-architect

Accessibility Architect specializing in WCAG 2.2 compliance for Web and Native platforms. Use PROACTIVELY when designing UI components, establishing design systems, or auditing code for inclusive user experiences.

ab-test-analysis

Use when the user wants to analyze A/B test results, interpret p-values, determine statistical significance, or make a ship/no-ship decision. Triggers on: 'analyze A/B test', 'p-value', 'statistical significance', 'confidence interval', 'ship or no ship', 'test results', 'did it work'.

ab-test-setup

When the user wants to plan, design, or implement an A/B test or experiment. Also use when the user mentions "A/B test," "split test," "experiment," "test this change," "variant copy," "multivariate test," or "hypothesis." For tracking implementation, see analytics-tracking.