Claude
A comprehensive skill catalog for AI agents
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Anthropic Claude AI models for analysis and coding. Use for AI assistants.
SKILL.md
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Claude
Claude (by Anthropic) is OpenAI's main competitor. It is famous for its large context window (200k+), low hallucination rates, and "Artifacts" UI.
When to Use
- Coding: Claude 3.5 Sonnet is widely considered the best coding model in 2025.
- Long Context: Analyzing massive PDFs or codebases.
- Safety: Enterprise-grade safety guardrails.
Core Concepts
Models
- Opus: The smartest, largest model.
- Sonnet: The sweet spot. Fast and incredibly capable.
- Haiku: Fast and cheap.
Artifacts
A UI feature (now an API pattern) where the model generates standalone content (React components, SVGs) in a side window.
Computer Use
Claude can interact with a computer GUI (moving mouse, clicking) via API.
Best Practices (2025)
Do:
- Use Sonnet for Dev: It beats GPT-4o in many coding benchmarks.
- Use XML Tags: Claude loves
<instructions>and<context>tags in prompts. - Prefill Responses: Guide Claude by prefilling the
{"role": "assistant", "content": "{"}to force JSON.
Don't:
- Don't ignore System Prompts: Claude relies heavily on strong system instructions.