data-systems-architecture

# Claude Skills

A curated collection of skills for [Claude Code](https://docs.anthropic.com/en/docs/claude-code)—reusable knowledge that Claude automatically applies when relevant.

| Skill | Description |

|-------|-------------|

| [annas-archive-ebooks](#annas-archive-ebooks) | Search and download ebooks from Anna's Archive |

| [assembly-ai-streaming](#assembly-ai-streaming) | Real-time speech-to-text and voice agent development |

| [clean-code](#clean-code) | Write readable, maintainable code (Robert C. Martin) |

| [design-patterns](#design-patterns) | GoF and enterprise architecture patterns |

| [documentation-scraper](#documentation-scraper) | Scrape docs sites into markdown for AI context |

| [ebook-extractor](#ebook-extractor) | Extract text from EPUB, MOBI, and PDF files |

| [kalshi-prediction-market](#kalshi-prediction-market) | Prediction market mechanics and Kalshi API |

| [medium-paywall-bypass](#medium-paywall-bypass) | Read paywalled Medium articles |

| [modern-web-app-architecture](#modern-web-app-architecture) | SPA/SSR/SSG architecture decisions |

| [postgres-query-expert](#postgres-query-expert) | PostgreSQL 16 queries and optimization |

| [systematic-debugging](#systematic-debugging) | Root-cause debugging methodology |

| [web-interface-design](#web-interface-design) | UI design: forms, buttons, layouts, color |

| [writing-claude-skills](#writing-claude-skills) | Create effective Claude Code skills |

---

annas-archive-ebooks

Search and download ebooks from Anna's Archive

Search millions of books across formats (PDF, EPUB, MOBI, etc.) and download them using the fast download API.

Features:

• Search by title, author, or both
• Filter by format (PDF, EPUB, MOBI, AZW3, DJVU)
• Sort by year to get most recent editions
• Verify search results match expected title
• Download via fast API

Requirements:

• ANNAS_ARCHIVE_KEY environment variable (requires Anna's Archive membership)

Usage:

```bash

python3 annas.py search "Clean Code Robert Martin" --format pdf

python3 annas.py download --output ./books/

```

---

assembly-ai-streaming

AssemblyAI Speech-to-Text and streaming transcription

Work with AssemblyAI's Speech-to-Text and LLM Gateway APIs, especially for streaming/live transcription, meeting notetakers, and voice agents.

Covers:

• Real-time streaming transcription
• Meeting notetaker integration
• Voice agent development
• LLM Gateway API usage
• Low-latency audio analysis

---

clean-code

Write readable, maintainable code (based on Robert C. Martin)

Apply Clean Code principles when writing, reviewing, or refactoring code. Covers naming, functions, classes, error handling, and tests.

Key Principles:

• Names should reveal intent
• Functions should do one thing
• Classes should have single responsibility
• Handle errors explicitly, don't return null
• Tests should be fast, independent, and readable

Chapter References:

• chapters/names.md — Naming conventions
• chapters/functions.md — Function design
• chapters/classes.md — Class structure
• chapters/comments.md — When (not) to comment
• chapters/error-handling.md — Exception patterns
• chapters/objects-and-data.md — Data structures vs objects
• chapters/tests.md — Test design

---

documentation-scraper

Scrape documentation sites into markdown for AI context

Use slurp-ai to download and compile documentation websites into a single markdown file optimized for AI agent consumption.

Workflow:

1. Analyze sitemap first (node analyze-sitemap.js )
2. Review page counts and section structure
3. Run slurp with informed --base-path and --max parameters

Features:

• Sitemap analyzer script for pre-scrape reconnaissance
• Guidance on scoping large documentation sites
• CLI reference for slurp-ai options

Requirements:

• Node.js v20+
• npm install -g slurp-ai

---

design-patterns

**GoF and enterprise a