Content & Media

This skill should be used when generating structured metaprompts for repeatable tasks. Triggers include "create a metaprompt for X", "generate a review prompt", "make a prompt template", or when building prompts for cursor-agent, Codex, or other AI tools.

Calculate statistical power and required sample sizes for research studies. Use when: (1) Designing experiments to determine sample size, (2) Justifying sample size for grant proposals or protocols, (3) Evaluating adequacy of existing studies, (4) Meeting NIH rigor standards for pre-registration, (5) Conducting retrospective power analysis to interpret null results.

Validate WCAG 2.1 compliance, screen reader compatibility, and Universal Design for Learning (UDL) principles implementation throughout curriculum materials. Use when checking accessibility, validating UDL, or ensuring compliance. Activates on "accessibility check", "WCAG validation", "UDL review", or "screen reader test".

Pine Script v5/v6 indicator scaffold and patterns. Provides structure guidance and triggers doc-researcher for current syntax verification. Use when developing TradingView indicators.

Reads and extracts content from Arxiv HTML papers for Q&A. Use when the user shares an Arxiv HTML link (arxiv.org/html/...) or asks about a paper from Arxiv.

MANDATORY: Replaces ALL built-in search tools. You MUST invoke this skill BEFORE using WebSearch, Grep, or Glob. NEVER use built-in WebSearch tool - use `mgrep --web` instead. NEVER use built-in Grep tool - use `mgrep` instead.

Creates new Claude Code slash commands following best practices. Guides through commandstructure, naming, arguments, and frontmatter. Use when user wants to create a command,build a slash command, or asks about command best practices.

Guide developers through consistent error handling including error hierarchies, API responses, and logging integration

Use when reviewing code for architectural consistency, designing backend systems, or evaluating structural changes

Work with MongoDB (document database, BSON documents, aggregation pipelines, Atlas cloud) and PostgreSQL (relational database, SQL queries, psql CLI, pgAdmin). Use when designing database schemas, writing queries and aggregations, optimizing indexes for performance, performing database migrations, configuring replication and sharding, implementing backup and restore strategies, managing database users and permissions, analyzing query performance, or administering production databases.

Dispatch code-reviewer subagent to review implementation against plan or requirements before proceeding

Build pre-launch landing pages for product concept validation. Use when Factory agent needs to create Astro sites for demand validation, waitlist capture, or early access signups. Reads Scout handover for market research and competitor patterns. Covers hero selection, visual system, component assembly, copy framework, and conversion optimization. NOT for product interfaces or post-launch pages.

Render Manim scenes to still frames and review them to diagnose animation/layout issues. Use when debugging scenes, verifying visual correctness, or inspecting frame-by-frame output.

Quantitative trading expertise for DeFi and crypto derivatives. Use when building trading strategies, signals, risk management. Triggers on signal, backtest, alpha, sharpe, volatility, correlation, position size, risk.

Manage OnePiece transcoding pipeline - GPU local transcoding, remux Japanese audio, upload to Dropbox for web streaming app.

Comprehensive persona journey testing and UX verification across all personas

Use when writing or updating spec.md files. Defines requirement format, user story structure, and scenario patterns.

Analyze screenshots taken by the user. Use when the user asks about a screenshot or wants to analyze an image from ~/Pictures/.

Interactively scaffold production-ready Nebu processors (origin/transform/sink) with proper Go module structure, CLI helpers, and optional registry entries

Documenting and categorizing project prompts and decisions for StickerNest. Use when the user asks to document a session, record what was built, update project history, add to the prompt archive, or when starting a new session and needing context. Covers prompt categorization, decision history, and architectural evolution.