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phospho

Phospho is a text analytics and evaluation platform for LLM apps. It logs sessions, runs clustering, detects failures, and surfaces actionable insights.

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.

athina-ai

Athina AI provides developer-focused LLM monitoring and eval framework: real-time inference logging, automated evals, and regression detection in CI.

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-pace

A lightweight Bash + jq statusline for Claude Code that displays rate limit pace delta (burn rate vs. time remaining), 5h/7d usage percentage, context window usage, git branch and diff stats. Compares current consumption rate against time remaining in each rate limit window to indicate whether quota is being used faster or slower than the window allows. Single file with no external dependencies beyond jq.

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.

claudia-statusline

High-performance Rust-based statusline for Claude Code with persistent stats tracking, progress bars, and optional cloud sync. Features SQLite-first persistence, git integration, context progress bars, burn rate calculation, XDG-compliant with theme support (dark/light, NO_COLOR).

galileo-evaluate

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

honeycomb

Honeycomb's OpenTelemetry-native observability platform: a high-cardinality event store ideal for tracing LLM pipelines and debugging slow agent traces.

baserun

Baserun captures LLM traces via a lightweight decorator-based SDK and provides a dashboard for debugging prompt chains, testing variants, and measuring quality.

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.