PromptsMar 29, 2026·1 min read

Anthropic Prompt Engineering Guide

Official prompting guide from Anthropic for Claude models. Covers system prompts, chain-of-thought, few-shot examples, XML tags, tool use, and advanced techniques.

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Quick Use

Use it first, then decide how deep to go

This block should tell both the user and the agent what to copy, install, and apply first.

Apply these techniques in any Claude conversation or API call.


Intro

The official Anthropic guide to getting the best results from Claude. Covers foundational techniques, advanced patterns, and real-world examples for prompt engineering.

Best for: Developers building with Claude API, prompt engineers, AI application builders Works with: Claude (all models)


Key Techniques

1. Be Specific and Direct

Bad: "Help me with code" Good: "Write a Python function that takes a list of integers and returns the top 3 most frequent elements. Use type hints and include docstring."

2. Use XML Tags for Structure

<instructions>
Analyze the following code for security vulnerabilities.
Focus on: SQL injection, XSS, authentication bypass.
</instructions>

<code>
{user_code}
</code>

3. Chain of Thought

"Think step by step before answering. First identify the problem, then consider approaches, then implement the best one."

4. Few-Shot Examples

Provide 2-3 input/output examples before the actual task.

5. Role Prompting

"You are a senior security researcher with 15 years of experience in web application penetration testing."

6. Prefilled Responses

Start Claude's response with the format you want.


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Source & Thanks

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