joemccann

Show native macOS UI from scripts and agents — dialogs, forms, visualizations, floating widgets, cursor companions. Use when you need to display HTML to the user, collect input, show a chart, render markdown, or create any visual interaction without a browser.

Send branded macOS notifications with custom app icon using terminal-notifier. Use when implementing native Notification Center integration with custom branding.

Best practices and example-driven guidance for building SwiftUI views and components. Use when creating or refactoring SwiftUI UI, designing tab architecture with TabView, composing screens, or needing component-specific patterns and examples.

Use this skill when planning, auditing, or refining the assistant UX in the native macOS client, especially setup, settings, chat trust surfaces, prompt wrappers, and command transparency.

Use this skill when planning, auditing, or implementing Metal-backed macOS desktop surfaces, especially hybrid SwiftUI/AppKit plus MetalKit apps, shader packaging, MTKView integration, and Metal toolchain setup.

Run an autonomous browser agent to complete a task on a website

Take a screenshot of a webpage using the streaming browser

Start a streaming browser session with real-time visual feedback

Institutional-grade Python backtesting framework builder for Codex. Use this skill whenever the user mentions backtesting, quant strategy, alpha model, trading system, signal engine, portfolio backtest, walk-forward optimization, strategy performance, Sharpe ratio calculation, look-ahead bias, transaction cost modeling, or building any systematic trading infrastructure. Also trigger on mentions of vectorized signals, position sizing, mark-to-market, risk metrics (VaR, Sortino, Calmar), regime filters, or factor attribution. If the user says "backtest this idea" or "test my trading strategy", use this skill.

Semantic web search, similar page discovery, and content extraction via Exa AI API. Use when the user needs meaning-based search (not keyword matching), wants to find pages similar to a URL, or needs clean content extraction from web pages. Requires EXA_API_KEY environment variable.

Use this skill whenever the user wants to do anything with PDF files. This includes reading or extracting text/tables from PDFs, combining or merging multiple PDFs into one, splitting PDFs apart, rotating pages, adding watermarks, creating new PDFs, filling PDF forms, encrypting/decrypting PDFs, extracting images, and OCR on scanned PDFs to make them searchable. If the user mentions a .pdf file or asks to produce one, use this skill.

xAI Grok APIs for image generation, chat, vision, live search, and video. Use when the user asks to use Grok, xAI, or Grok Imagine for generating images, chatting with Grok, analyzing images with Grok Vision, searching the web/news/X with Grok, or generating videos. Triggers on "grok", "xai", "grok imagine", "ask grok", "grok vision", "grok search".