Create interactive Chart.js visualizations for DST data analysis. Use when generating charts, creating visual reports, building dashboards, or displaying trends from database tables.

Workflow for private repos + Colab training. Trigger when: (1) training on Colab with private repo, (2) separating dev from production, (3) avoiding untested code in production.

Use when building reusable PyPI package with pgdbm - provides complete pattern for libraries that work standalone or embedded without needing examples

Use AFTER any code changes (feature implementation, bug fix, refactor) to enforce mandatory dual-pass review. First pass reviews unstaged changes for correctness and convention compliance. Second pass ONLY executes if first pass made any corrections. Ensures work follows project conventions, development rules, and best practices before task completion.

Use two independent agents for reviews or research, then collate findings to identify common findings, unique insights, and divergences

Analyze AWS Application Load Balancer (ALB) logs stored in S3 using DuckDB. Use when users request ALB log analysis, error investigation, performance analysis, traffic analysis, or need to query ALB access logs. Supports analyzing response times, status codes, error patterns, and traffic trends from S3-stored logs.

Building DuckDB loadable extensions with CMake, FetchContent, and proper metadata handling

Generate DuckDB SQL queries. Use when user asks about DuckDB queries, data analysis, exploring .ddb database files, CSV files, Parquet files, wants help editing/improving SQL, asks to use the duckdb skill, references duckdb assets, or wants to initialize/setup duckdb analysis.

' Layer 3: Temporal Versioning and ACSet Schema Generation for DuckDB'

Comprehensive application audit. Analyzes best practices, security compliance, frontend design quality. Identifies top improvements and critical errors. Produces scores for design, code quality, and security.

Single source of truth and librarian for ALL Duende Software documentation. Manages local documentation storage, scraping, discovery, and resolution. Use when finding, locating, searching, or resolving Duende documentation; discovering docs by keywords, category, tags, or natural language queries; scraping from llms-full.txt; managing index metadata (keywords, tags, aliases); or rebuilding index from filesystem. Run scripts to scrape, find, and resolve documentation. Handles doc_id resolution, keyword search, natural language queries, category/tag filtering, alias resolution, llms-full.txt parsing, markdown subsection extraction for internal use, hash-based drift detection, and comprehensive index maintenance.

Provider-agnostic wait-for-change skill that uses the Dumbwaiter MCP server to wait on PR events (GitHub first) via wait.start/status/cancel/await, with progress notifications and durable state.

A dummy skill that returns a fixed response.

Mark and remove PCR/optical duplicates using samtools fixmate and markdup. Use when preparing alignments for variant calling or when duplicate reads would bias analysis.

Find and eliminate code duplication with DRY refactoring strategies

Automatically validates Cloudflare Durable Objects usage patterns, ensuring correct state management, hibernation, and strong consistency practices

Lightweight tactical guidance during implementation. Just MCP suggestions and quick lookups, no heavy Graphiti searches.

Writing durable workflows using Duroxide in Rust. Use when creating orchestrations, activities, workflows, or when the user mentions duroxide, durable functions, or workflow orchestration.

Downloads Dutch official legal publications including national laws (wetten, ministeriele regelingen, koninklijk besluiten), local regulations (lokale verordeningen, gemeentelijk beleid), and implementation policies (uitvoeringsbeleid) from government databases (BWB, CVDR) and converts them to YAML format with textual content only. Use when user wants to download, fetch, or import any Dutch regulation by name or type.

Convert AutoCAD DWG files (1983-2026) to Excel databases using DwgExporter CLI. Extract layers, blocks, attributes, and geometry data without Autodesk licenses.

Automatically applies when adding configuration settings. Ensures proper dynaconf pattern with @env, @int, @bool type casting in settings.toml and environment-specific overrides.

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Use when implementing flexible content schemas using EF Core JSON columns, `OwnsOne().ToJson()` patterns, or designing dynamic field storage that avoids migrations. Covers JSON column configuration, LINQ querying of JSON properties, indexing strategies, and schema evolution patterns for headless CMS architectures.

AWS DynamoDB NoSQL database for scalable data storage. Use when designing table schemas, writing queries, configuring indexes, managing capacity, implementing single-table design, or troubleshooting performance issues.

Execute AI-generated code in secure isolated E2B cloud sandboxes with advanced monitoring, MCP gateway integration (200+ tools), and multi-language support. Use for running Python/JavaScript/TypeScript/Bash code, managing sandbox lifecycle (create, pause, resume, kill, list, connect), monitoring metrics (CPU, memory, disk), handling lifecycle events, uploading/downloading files, streaming command output, environment variable management, and integrating LLMs with code execution capabilities.

Playwright E2E testing patterns. Use when working on files in tests/e2e/.

Generate end-to-end tests with Playwright browser automation

Systematically test all pages for errors, functionality, and proper rendering using Playwright MCP

Diagnose and resolve E2E test failures in Playwright. This skill should be used when E2E tests fail and need investigation, when Playwright test errors require root cause analysis, or when test failures need to be reproduced in the browser for debugging. Orchestrates MCP tools (Playwright, Chrome DevTools, Serena) and delegates code fixes to specialized agents.

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Playwright end-to-end testing expert. Use when writing E2E tests, browser automation, or debugging flaky tests.

Production E2E testing for The Simpsons API using Chrome DevTools MCP for browser automation and Neon MCP for real-time database verification. Covers smoke journeys, mutation validation, and deployment sanity checks. Use when the user asks to run, design, or validate E2E tests against the production site, verify live deployments, or perform post-deploy checks.

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Build reliable end-to-end tests for critical user flows.

Execute end-to-end test scenarios against running microservices with automatic debugging and reporting.

Design E2E tests following user-story-driven patterns with verification checkpoints. Use when creating end-to-end tests, validating complete user journeys, or designing Playwright/Cypress test patterns.

This skill helps fix three critical E2E test issues:

e2e-test-runner

End-to-end testing scenarios for Supabase - complete workflow tests from project creation to AI features, validation scripts, and comprehensive test suites. Use when testing Supabase integrations, validating AI workflows, running E2E tests, verifying production readiness, or when user mentions Supabase testing, E2E tests, integration testing, pgvector testing, auth testing, or test automation.

Write comprehensive end-to-end tests using Playwright with page object

End-to-end testing using Playwright MCP. Automate user workflows, take screenshots, validate UI/UX, perform visual regression testing, and verify complete user journeys. Use after feature implementation or before deployment.

Build autonomous end-to-end full-stack testing agents using Claude's Computer Use API, LangGraph orchestration, and hybrid Playwright automation. Use this skill when building testing infrastructure, test automation, CI/CD test integration, or self-healing test systems.

Build end-to-end automated tests that simulate real user interactions across the full application stack. Use for E2E test, Selenium, Cypress, Playwright, browser automation, and user journey testing.

End-to-end testing expert for Playwright, Cypress, visual regression (Percy, Chromatic), and UI testing. Use for E2E tests, browser automation, visual diffs, or debugging flaky tests.

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Write E2E tests with Playwright using selector best practices. Use when you need to write end-to-end integration tests, user scenarios, or complete workflows.

Run E2E tests for Sentry JavaScript SDK test applications

Analyzes why stocks moved after 8-K earnings filings. Use ultrathink for all analyses. Invoke when asked to analyze stock movements, earnings reactions, or determine the primary driver of price changes.

EARS requirement pattern authoring. Use when writing requirements using EARS patterns (Ubiquitous, State-Driven, Event-Driven, Unwanted, Optional, Complex). Provides pattern templates, validation, and examples.

EAS Build configuration for iOS and Android. Use when setting up cloud builds.