Build retrieval-augmented generation pipelines with ColBERTv2 that can be systematically optimized.

Build type-safe LLM applications with DSPy.rb - Ruby's programmatic prompt framework with signatures, modules, agents, and optimization

This skill should be used when working with DSPy.rb, a Ruby framework for building type-safe, composable LLM applications. Use this when implementing predictable AI features, creating LLM signatures and modules, configuring language model providers (OpenAI, Anthropic, Gemini, Ollama), building agent systems with tools, optimizing prompts, or testing LLM-powered functionality in Ruby applications.

Optimize DSPy programs using mini-batch Bayesian optimization with statistical analysis of feedback signals.

Execute SQL queries on Danmarks Statistik data stored in DuckDB. Use when user needs specific data analysis, filtering, aggregation, or joins. Also includes table summary functionality.

dst-report-template

Test distributed systems with reproducible deterministic simulation using turmoil

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.

This skill should be used when performing local data exploration, profiling, quality analysis, or transformation tasks using DuckDB. It handles CSV, Parquet, and JSON files, provides automated data quality reports, supports complex JSON transformations, and generates interactive HTML reports for data analysis.

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.

Fast in-process analytical database for SQL queries on DataFrames, CSV, Parquet, JSON files, and more. Use when user wants to perform SQL analytics on data files or Python DataFrames (pandas, Polars), run complex aggregations, joins, or window functions, or query external data sources without loading into memory. Best for analytical workloads, OLAP queries, and data exploration.

Coordinate and prepare for investor due diligence with organized data rooms

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.

Track Duolingo language learning progress and maintain streaks

**Core principle:** Systematic automated detection > manual subjective review

Find and eliminate code duplication with DRY refactoring strategies

Create and review Cloudflare Durable Objects. Use when building stateful coordination (chat rooms, multiplayer games, booking systems), implementing RPC methods, SQLite storage, alarms, WebSockets, or reviewing DO code for best practices. Covers Workers integration, wrangler config, and testing with Vitest.

Expert in optimizing the end-to-end developer journey. Specializes in Internal Developer Portals (IDP), DORA metrics, and on-call health. Use when improving developer experience, building internal platforms, measuring engineering productivity, or reducing developer friction.

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

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.

Analyze Dynamo (.dyn) graphs to extract workflow, Python/DesignScript code, Revit API patterns, and generate comprehensive reports for C# developers

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.

Control Dyson air purifiers, fans, and heaters via local MQTT. Use when asked to control Dyson devices, adjust fan speed, set temperature/heat, enable oscillation, or check room temperature/humidity. Requires being on the same WiFi network as the device.

Comprehensive skill for building, debugging, and optimizing DZMM.AI applications. Use this skill when users request creating interactive web apps on the DZMM platform, need guidance on DZMM API usage, or require help with existing DZMM applications. Covers AI-driven chatbots, visual novels, dating sims, content generators, RPG games, content platforms, and visual effect systems. Includes state management games, message management (reroll/edit/delete), multi-opening systems, rich text rendering, modular prompt engineering, resource reuse strategies, React/Vue to DZMM migration, and responsive mobile design.

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.

e2e-first-planning

Execute complete user flow testing with Playwright MCP, testing end-to-end journeys through the application

Generate end-to-end tests with Playwright browser automation

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

Use when symfony e2e panther playwright

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.

Execute comprehensive role-based E2E testing with Playwright, testing all user flows for each role

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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:

Create comprehensive E2E test plans with deep application analysis, navigation coverage audit, and browser-testable scenarios

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

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.