Frontend

Operational patterns, templates, and decision rules for time series forecasting (modern best practices): tree-based methods (LightGBM), deep learning (Transformers, RNNs), future-guided learning, temporal validation, feature engineering, generative TS (Chronos), and production deployment. Emphasizes explainability, long-term dependency handling, and adaptive forecasting.

Specialized Preact development skill for standards-based web applications with native-first architecture and minimal dependency footprint. Use when building Preact projects, particularly those involving data visualization, interactive applications, single-page apps with HTM syntax, Web Components integration, CSV/JSON data parsing, WebGL shader visualizations, or zero-build solutions with CDN imports.

Complete LLM development and engineering skill. Covers strategy selection (prompting vs fine-tuning vs RAG), dataset design, PEFT/LoRA fine-tuning, evaluation workflows, vLLM deployment, and production optimization. Modern best practices for building, evaluating, and scaling LLM systems.

Use when building persistent codebase intelligence for AI agents or integrating knowledge systems via MCP

Expert on building decentralized applications with Shelby Protocol storage on Aptos. Helps with dApp architecture, wallet integration (Petra), browser SDK usage, React/Vue integration, file uploads, content delivery, and building Shelby-powered applications. Triggers on keywords Shelby dApp, build on Shelby, Shelby application, Petra wallet, browser storage, web3 app, decentralized app Shelby, React Shelby, Vue Shelby.

Expert CLI developer specializing in command-line interface design, developer tools, and terminal applications. Masters user experience, cross-platform compatibility, and building efficient CLI tools that developers love to use.

Use when creating new Angular components, directives, or pipes. Triggers on requests to "create component", "add component", "new component", "build a component", or modify existing component patterns.

Use when creating forms with validation in Angular. Triggers on requests involving "form", "validation", "input fields", "form validation", "schema validation", or when building user input forms.

Delivers a static Hello World HTML demo page with bookmarklet. Use when user requests the hello demo, hello world demo, or demo page.

Expert MCP developer specializing in Model Context Protocol server and client development. Masters protocol specification, SDK implementation, and building production-ready integrations between AI systems and external tools/data sources.

Expert guidance for Plaid banking API integration including Link, Auth, Transactions, Identity, and webhook handling. Invoke when user mentions Plaid, bank connections, financial data, ACH, or banking APIs.

Technical writing patterns for README files, API documentation, architecture decision records (ADRs), changelogs, contributing guides, code comments, and docs-as-code workflows. Covers documentation structure, style guides, Markdown best practices, and documentation testing.

Expert build engineer specializing in build system optimization, compilation strategies, and developer productivity. Masters modern build tools, caching mechanisms, and creating fast, reliable build pipelines that scale with team growth.

Systematic research methodology for building comprehensive, current knowledge on any topic. Requires web_search tool. Use when questions require thorough investigation, recent developments post-cutoff, synthesis across multiple sources, or when Claude's knowledge may be outdated or incomplete. Triggered by "Research", "Investigate", "What's current on", "Latest info on", complex queries needing validation, or technical topics with recent changes.

Expert Vue specialist mastering Vue 3 with Composition API and ecosystem. Specializes in reactivity system, performance optimization, Nuxt 3 development, and enterprise patterns with focus on building elegant, reactive applications.

Implements CLI user experience with output formatting, progress indicators, and interactive prompts. Uses chalk, ora, and inquirer for consistent terminal interactions. Triggers on: CLI output, progress bar, spinner, ora, chalk, inquirer prompts, error formatting, exit codes, reporter.

Turns product or tech specs into concrete Notion tasks that Claude code can implement. Breaks down spec pages into detailed implementation plans with clear tasks, acceptance criteria, and progress tracking to guide development from requirements to completion.

Manages Fizzy boards, cards, steps, comments, and reactions. Use when user asks about boards, cards, tasks, backlog or anything Fizzy.

TypeScript code quality patterns for writing and reviewing code. Covers type safety, clean code, functional patterns, Zod usage, and error handling. Triggers on: add entity, create service, add repository, create comparator, add formatter, deployment stage, GraphQL query, GraphQL mutation, bootstrap method, diff support, command handler, Zod schema, error class, implement feature, add function, refactor code, clean code, functional patterns, map filter reduce, satisfies operator, type guard, code review, PR review, check implementation, audit code, fix types.

Complete guide to Next.js 16 features, breaking changes, and migration from v15. Use when building new Next.js projects or upgrading existing ones to leverage Turbopack, Cache Components, and latest performance optimizations.