Development

Expo development and build workflows. Use when working with Expo CLI, development builds, adding native dependencies, or configuring app.json.

Auto-activates when writing or editing prose in the manuscript/ directory. Applies Max Ghenis's direct, active voice, data-driven writing style.

This skill provides comprehensive knowledge for integrating Neon serverless Postgres and Vercel Postgres (which is built on Neon infrastructure) into web applications. It should be used when setting up serverless Postgres databases, configuring connection pooling for edge and serverless environments, implementing database branching workflows, or troubleshooting Postgres connection issues in Cloudflare Workers, Vercel Edge Functions, or Node.js serverless functions.Use this skill when:- Setting up Neon Postgres for Cloudflare Workers, Vercel Edge, or serverless environments- Configuring Vercel Postgres for Next.js applications- Implementing database branching workflows (git-like database branches)- Integrating Drizzle ORM or Prisma with Neon/Vercel Postgres- Debugging connection pool errors, transaction timeouts, or SSL configuration issues- Migrating from D1/SQLite to Postgres or from traditional Postgres to serverless Postgres- Setting up point-in-time restore (PITR) or database backups- Encounteri

Maintain in-repo documentation for the widget host app: doc templates, ADRs, and architecture diagrams. Use when creating or updating docs under `docs/`, or when standardizing doc formats for contributors.

Expert-level C# unit testing skill based on ISTQB standards and best practices. Use this skill when creating, reviewing, or refactoring unit tests for C# applications (.NET/ASP.NET Core). Applies test design techniques, coverage strategies, and quality assurance principles from ISTQB Foundation and Advanced levels.

Code navigation and indexing (F#, Ruby)

Design and implement RESTful APIs, GraphQL endpoints, and backend API architecture following modern standards. Use this skill when creating or modifying API endpoints, route handlers, controllers, API middleware, authentication/authorization logic, or any files that define HTTP endpoints such as routes.py, api.js, controllers/, endpoints/, or API specification files (OpenAPI/Swagger). Apply this skill when implementing API versioning, rate limiting, request/response handling, API documentation, or when working with API gateway configurations. This skill is essential for building scalable, secure, and well-documented APIs that follow RESTful principles, handle errors gracefully, and provide consistent developer experiences across microservices and serverless architectures.

This skill should be used when working with LaminDB, an open-source data framework for biology that makes data queryable, traceable, reproducible, and FAIR. Use when managing biological datasets (scRNA-seq, spatial, flow cytometry, etc.), tracking computational workflows, curating and validating data with biological ontologies, building data lakehouses, or ensuring data lineage and reproducibility in biological research. Covers data management, annotation, ontologies (genes, cell types, diseases, tissues), schema validation, integrations with workflow managers (Nextflow, Snakemake) and MLOps platforms (W&B, MLflow), and deployment strategies.

Find existing packages before writing custom code. Uses context7 and websearch to discover battle-tested solutions, maximizes package usage to minimize custom code and complexity. Use when implementing features, adding functionality, or when user requests new capabilities.

Understand and apply psychological concepts to create superior user experiences (UX) in frontend design.

Use when applying animation principles in any context, for any role, or when a general understanding of Disney's 12 principles is needed.

Unified Twitter/X API client for retrieving user info and tweets via twitterapi.io. Supports user lookup and advanced tweet search with a clean Typer-based CLI and agent-friendly Python interface.

Invoke IMMEDIATELY via python script for structured problem analysis and decision reasoning. Do NOT explore first - the script orchestrates the workflow.

Create beautiful, accessible user interfaces with shadcn/ui components (built on Radix UI + Tailwind), Tailwind CSS utility-first styling, and canvas-based visual designs. Use when building user interfaces, implementing design systems, creating responsive layouts, adding accessible components (dialogs, dropdowns, forms, tables), customizing themes and colors, implementing dark mode, generating visual designs and posters, or establishing consistent styling patterns across applications.

Guide d'installation Astro + Tailwind sur Windows. Covers Node.js setup, pnpm, project creation, common Windows issues, and troubleshooting.

Fix React Rules of Hooks violations - conditional calls, hooks in loops/callbacks/classes

PROACTIVELY use when exploring unfamiliar codebases, analyzing remote repositories, generating reference skills from code, or needing AI-optimized context for code review. Triggers on "analyze repo", "explore codebase", "pack repository", "generate skill from", "understand this codebase", "code context".

Follow project-wide development conventions for file organization, version control, documentation, and dependency management. Use this skill when organizing project directories and files, writing README documentation, creating commit messages, working with git branches, managing pull requests, configuring environment variables, handling secrets and API keys, managing project dependencies, setting up feature flags, maintaining changelogs, defining testing requirements, establishing code review processes, or structuring the overall project architecture. Apply this skill when setting up new projects, refactoring project structure, working with version control, managing configuration files, or ensuring the project follows consistent organizational patterns and best practices.

Use when writing Go code to interact with Gitea API - automation, bots, integrations, migrations, or programmatic git forge operations

HTMLCSStoImage API via curl. Use this skill to generate images from HTML/CSS or capture screenshots of web pages.