Top Agent Skills for December 19, 2025
Daily rankings of Agent Skills for Claude, ChatGPT & Codex sorted by GitHub stars.
Skill Writer
Author and optimize custom Agent Skills for Claude Code with standardized structures, frontmatter, and discovery-optimized descriptions.
Financial Modeling Suite
Constructs advanced financial models including DCF analysis, sensitivity testing, and Monte Carlo simulations for professional investment valuation.
Create Skill File
Guides the creation of standardized SKILL.md files to enhance Claude agents with domain-specific knowledge and structured workflows.
Skill Builder
Generates production-ready Claude Code Skills following the official specification for optimal discovery and performance.
Documentation Sync
Ensures technical documentation remains accurate by validating code examples, API signatures, and file paths against the current codebase and git history.
Route Tester
Tests and validates authenticated API routes using cookie-based JWT authentication and mock authorization patterns.
Error Tracking
Enforces comprehensive Sentry v8 error tracking and performance monitoring across services to ensure every exception is captured and analyzed.
Web E2E Testing
Develops, executes, and debugs Playwright end-to-end tests for the Uniswap web application using custom fixtures and automated blockchain environments.
Buck2 Rule Basics
Teaches the fundamentals of writing Buck2 rules through an interactive, step-by-step tutorial covering implementation, actions, and configurations.
Positron Notebooks
Facilitates the development, debugging, and maintenance of React-based notebook interfaces within the Positron IDE.