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prompt-engineer · davila7 — Claude Code skill: what it does, how to install

Designs structured system prompts, few-shot examples, and reasoning chains for LLM apps. Helpful when prompts need rigorous instructions and strict output formats.

Install into Claude Code · claude-code-templates All methods and platforms ↓
npx claude-code-templates@latest --skill ai-research/prompt-engineer
Open on GitHub

What prompt-engineer does

This skill treats prompts like code. It arranges system instructions into separate blocks: persona, background context, direct instructions, negative constraints, output schema, and demonstrations. This setup keeps models from guessing schemas.

It applies few-shot patterns using 2 to 5 diverse test cases, including edge cases and negative samples. For difficult logic, it configures chain-of-thought prompts to extract intermediate thinking before the answer. Basic programming concepts and tokenization knowledge are required.

Uncurated context degrades prompt performance fast. The skill focuses on removing irrelevant details, setting task-specific temperature, and guarding inputs against prompt injection. Measuring output quality matters.

What it helps with

  • Structure complex system prompts with negative constraints and clear schemas
  • Select 2 to 5 balanced few-shot examples covering edge cases
  • Implement chain-of-thought logic to inspect intermediate reasoning steps
  • Protect user inputs against prompt injection attacks

Example prompts for the agent

  • Write a structured system prompt for an API log parser with negative constraints
  • Build few-shot examples for a classifier handling ambiguous inputs
  • Add chain-of-thought reasoning to debug our reasoning prompt failures

How to install prompt-engineer

1claude-code-templates

npx claude-code-templates@latest --skill ai-research/prompt-engineer

2Skills CLI (Vercel)

npx skills add davila7/claude-code-templates --skill prompt-engineer -a claude-code

3Manually: put the files in place

~/.claude/skills/prompt-engineer/SKILL.md

Copy the whole skill folder; for one project use .claude/skills/prompt-engineer/

Step by step, with commands for each platform: How to install skills in Claude Code: five ways

Questions about prompt-engineer

How do I install prompt-engineer in Claude Code?

Run npx claude-code-templates@latest --skill ai-research/prompt-engineer in your terminal. Claude Code will immediately make the skill available.

What does the prompt-engineer skill do?

It guides the creation of system prompts, context management, few-shot demonstrations, and chain-of-thought reasoning for LLM applications.

What skills work well alongside prompt-engineer?

It pairs directly with ai-agents-architect, rag-engineer, backend, and product-manager.

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