Prompt Mastery

Name: Prompt Mastery
Availability: InStock
Author: robertcope

Craft structured Claude prompts using XML, chain-of-thought, and prefilling techniques.

1|Updated Dec 24, 2025

Search Tags:#Claude #few-shot #prompt-engineering #prompt #CoT #XML prompts #prefill

One-click install

npx skills add https://github.com/robertcope/mira --skill prompt-mastery-robertcope

Or copy as Structured Prompt for Agent▼

Please help me install this Agent Skill.
Skill: Prompt Mastery
Source: https://github.com/robertcope/mira/tree/main/.claude/skills/prompt-mastery
Command: npx skills add https://github.com/robertcope/mira --skill prompt-mastery-robertcope

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Provides advanced prompt engineering techniques for Claude, enabling robust, structured prompts with XML, CoT, prefilling, and role-based prompting.

Core Features & Use Cases

XML-based prompt structure for Claude
Thinking-cap and meta-prompting patterns
Prefill and JSON/XML structured outputs
Few-shot prompting and chain-of-thought techniques
Role-based prompting and scaffolding

Quick Start

Before writing system prompts or tool descriptions, use this skill to craft a Claude-friendly prompt with explicit structure and output format.