prompt-creator

Expert prompt engineering for creating effective prompts for Claude, GPT, and other LLMs. Use when writing system prompts, user prompts, few-shot examples, or optimizing existing prompts for better performance.

8 stars

Best use case

prompt-creator is best used when you need a repeatable AI agent workflow instead of a one-off prompt.

Expert prompt engineering for creating effective prompts for Claude, GPT, and other LLMs. Use when writing system prompts, user prompts, few-shot examples, or optimizing existing prompts for better performance.

Teams using prompt-creator should expect a more consistent output, faster repeated execution, less prompt rewriting.

When to use this skill

  • You want a reusable workflow that can be run more than once with consistent structure.

When not to use this skill

  • You only need a quick one-off answer and do not need a reusable workflow.
  • You cannot install or maintain the underlying files, dependencies, or repository context.

Installation

Claude Code / Cursor / Codex

$curl -o ~/.claude/skills/meta-prompt-creator/SKILL.md --create-dirs "https://raw.githubusercontent.com/atournayre/claude-marketplace/main/mlvn/skills/meta-prompt-creator/SKILL.md"

Manual Installation

  1. Download SKILL.md from GitHub
  2. Place it in .claude/skills/meta-prompt-creator/SKILL.md inside your project
  3. Restart your AI agent — it will auto-discover the skill

How prompt-creator Compares

Feature / Agentprompt-creatorStandard Approach
Platform SupportNot specifiedLimited / Varies
Context Awareness High Baseline
Installation ComplexityUnknownN/A

Frequently Asked Questions

What does this skill do?

Expert prompt engineering for creating effective prompts for Claude, GPT, and other LLMs. Use when writing system prompts, user prompts, few-shot examples, or optimizing existing prompts for better performance.

Where can I find the source code?

You can find the source code on GitHub using the link provided at the top of the page.

SKILL.md Source

<objective>
Create highly effective prompts using proven techniques from Anthropic and OpenAI research. This skill covers all major prompting methodologies: clarity, structure, examples, reasoning, and advanced patterns.

Every prompt created should be clear, specific, and optimized for the target model.
</objective>

<quick_start>
<workflow>

1. **Clarify purpose**: What should the prompt accomplish?
2. **Identify model**: Claude, GPT, or other (techniques vary slightly)
3. **Select techniques**: Choose from core techniques based on task complexity
4. **Structure content**: Use XML tags (Claude) or markdown (GPT) for organization
5. **Add examples**: Include few-shot examples for format-sensitive outputs
6. **Define success**: Add clear success criteria
7. **Test and iterate**: Refine based on outputs
   </workflow>

<core_structure>
Every effective prompt has:

```xml
<context>
Background information the model needs
</context>

<task>
Clear, specific instruction of what to do
</task>

<requirements>
- Specific constraints
- Output format
- Edge cases to handle
</requirements>

<examples>
Input/output pairs demonstrating expected behavior
</examples>

<success_criteria>
How to know the task was completed correctly
</success_criteria>
```

</core_structure>
</quick_start>

<core_techniques>
<technique name="be_clear_and_direct">
**Priority**: Always apply first

- State exactly what you want
- Avoid ambiguous language ("try to", "maybe", "generally")
- Use "Always..." or "Never..." instead of "Should probably..."
- Provide specific output format requirements

See: [references/clarity-principles.md](references/clarity-principles.md)
</technique>

<technique name="use_xml_tags">
**When**: Claude prompts, complex structure needed

Claude was trained with XML tags. Use them for:

- Separating sections: `<context>`, `<task>`, `<output>`
- Wrapping data: `<document>`, `<schema>`, `<example>`
- Defining boundaries: Clear start/end of sections

See: [references/xml-structure.md](references/xml-structure.md)
</technique>

<technique name="few_shot_examples">
**When**: Output format matters, pattern recognition easier than rules

Provide 2-4 input/output pairs:

```xml
<examples>
<example number="1">
<input>User clicked signup button</input>
<output>track('signup_initiated', { source: 'homepage' })</output>
</example>
</examples>
```

See: [references/few-shot-patterns.md](references/few-shot-patterns.md)
</technique>

<technique name="chain_of_thought">
**When**: Complex reasoning, math, multi-step analysis

Add explicit reasoning instructions:

- "Think step by step before answering"
- "First analyze X, then consider Y, finally conclude Z"
- Use `<thinking>` tags for Claude's extended thinking

See: [references/reasoning-techniques.md](references/reasoning-techniques.md)
</technique>

<technique name="system_prompts">
**When**: Setting persistent behavior, role, constraints

System prompts set the foundation:

- Define Claude's role and expertise
- Set constraints and boundaries
- Establish output format expectations

See: [references/system-prompt-patterns.md](references/system-prompt-patterns.md)
</technique>

<technique name="prefilling">
**When**: Enforcing specific output format (Claude-specific)

Start Claude's response to guide format:

```
Assistant: {"result":
```

Forces JSON output without preamble.
</technique>

<technique name="context_management">
**When**: Long-running tasks, multi-session work, large context usage

For Claude 4.5 with context awareness:

- Inform about automatic context compaction
- Add state tracking (JSON, progress.txt, git)
- Use test-first patterns for complex implementations
- Enable autonomous task completion across context windows

See: [references/context-management.md](references/context-management.md)
</technique>
</core_techniques>

<prompt_creation_workflow>
<step_0>
**Gather requirements** using AskUserQuestion:

1. What is the prompt's purpose?
   - Generate content
   - Analyze/extract information
   - Transform data
   - Make decisions
   - Other

2. What model will use this prompt?
   - Claude (use XML tags)
   - GPT (use markdown structure)
   - Other/multiple

3. What complexity level?
   - Simple (single task, clear output)
   - Medium (multiple steps, some nuance)
   - Complex (reasoning, edge cases, validation)

4. Output format requirements?
   - Free text
   - JSON/structured data
   - Code
   - Specific template
     </step_0>

<step_1>
**Draft the prompt** using this template:

```xml
<context>
[Background the model needs to understand the task]
</context>

<objective>
[Clear statement of what to accomplish]
</objective>

<instructions>
[Step-by-step process, numbered if sequential]
</instructions>

<constraints>
[Rules, limitations, things to avoid]
</constraints>

<output_format>
[Exact structure of expected output]
</output_format>

<examples>
[2-4 input/output pairs if format matters]
</examples>

<success_criteria>
[How to verify the task was done correctly]
</success_criteria>
```

</step_1>

<step_2>
**Apply relevant techniques** based on complexity:

- **Simple**: Clear instructions + output format
- **Medium**: Add examples + constraints
- **Complex**: Add reasoning steps + edge cases + validation
  </step_2>

<step_3>
**Review checklist**:

- [ ] Is the task clearly stated?
- [ ] Are ambiguous words removed?
- [ ] Is output format specified?
- [ ] Are edge cases addressed?
- [ ] Would a person with no context understand it?
      </step_3>
      </prompt_creation_workflow>

<anti_patterns>
<pitfall name="vague_instructions">
❌ "Help with the data"
✅ "Extract email addresses from the CSV, remove duplicates, output as JSON array"
</pitfall>

<pitfall name="negative_prompting">
❌ "Don't use technical jargon"
✅ "Write in plain language suitable for a non-technical audience"
</pitfall>

<pitfall name="no_examples">
❌ Describing format in words only
✅ Showing 2-3 concrete input/output examples
</pitfall>

<pitfall name="missing_edge_cases">
❌ "Process the file"
✅ "Process the file. If empty, return []. If malformed, return error with line number."
</pitfall>

See: [references/anti-patterns.md](references/anti-patterns.md)
</anti_patterns>

<reference_guides>
**Core principles:**

- [references/clarity-principles.md](references/clarity-principles.md) - Being clear and direct
- [references/xml-structure.md](references/xml-structure.md) - Using XML tags effectively

**Techniques:**

- [references/few-shot-patterns.md](references/few-shot-patterns.md) - Example-based prompting
- [references/reasoning-techniques.md](references/reasoning-techniques.md) - Chain of thought, step-by-step
- [references/system-prompt-patterns.md](references/system-prompt-patterns.md) - System prompt templates
- [references/context-management.md](references/context-management.md) - Context windows, long-horizon reasoning, state tracking

**Best practices by vendor:**

- [references/anthropic-best-practices.md](references/anthropic-best-practices.md) - Claude-specific techniques
- [references/openai-best-practices.md](references/openai-best-practices.md) - GPT-specific techniques

**Quality:**

- [references/anti-patterns.md](references/anti-patterns.md) - Common mistakes to avoid
- [references/prompt-templates.md](references/prompt-templates.md) - Ready-to-use templates
  </reference_guides>

<success_criteria>
A well-crafted prompt has:

- Clear, unambiguous objective
- Specific output format with example
- Relevant context provided
- Edge cases addressed
- No vague language (try, maybe, generally)
- Appropriate technique selection for task complexity
- Success criteria defined
  </success_criteria>

Related Skills

prompt:validate

8
from atournayre/claude-marketplace

Vérifie la checklist avant exécution et liste les oublis

prompt:transform

8
from atournayre/claude-marketplace

Transforme un prompt en prompt exécutable compatible avec le Task Management System (TaskCreate/TaskUpdate/TaskList)

prompt:team

8
from atournayre/claude-marketplace

Orchestre une équipe d'agents spécialisés pour les tâches complexes. Auto-détecte le type, compose l'équipe, coordonne les phases analyse → challenge → implémentation → QA.

prompt:start

8
from atournayre/claude-marketplace

Démarre un développement avec un starter léger puis active le mode plan

skill-creator

8
from atournayre/claude-marketplace

This skill should be used when the user asks to "create a skill", "build a skill", "write a skill", "improve skill structure", "understand skill creation", or mentions SKILL.md files, skill development, progressive disclosure, XML structure, or bundled resources (scripts, references, assets). Comprehensive guide for creating effective Claude Code skills.

skill-workflow-creator

8
from atournayre/claude-marketplace

Expert guidance for creating, building, and using Claude Code subagents and the Task tool. Use when working with subagents, setting up agent configurations, understanding how agents work, or using the Task tool to launch specialized agents.

fix-grammar

8
from atournayre/claude-marketplace

Fix grammar and spelling errors in one or multiple files while preserving formatting

symfony-framework

8
from atournayre/claude-marketplace

Comprehensive Symfony 6.4 development skill for web applications, APIs, and microservices.

symfony:make

8
from atournayre/claude-marketplace

Cherche si il existe un maker Symfony pour faire la tache demandée et l'utilise si il existe. Si aucun maker n'existe alors utilise la slash command "/prepare"

phpstan-resolver

8
from atournayre/claude-marketplace

Résout automatiquement les erreurs PHPStan en analysant et corrigeant les problèmes de types. Boucle jusqu'à zéro erreur ou stagnation.

elegant-objects

8
from atournayre/claude-marketplace

Vérifie la conformité du code PHP aux principes Elegant Objects de Yegor Bugayenko. Analyse un fichier spécifique ou tous les fichiers modifiés dans la branche.

apex

8
from atournayre/claude-marketplace

Systematic implementation using APEX methodology (Analyze-Plan-Execute-eXamine) with parallel agents, self-validation, and optional adversarial review. Use when implementing features, fixing bugs, or making code changes that benefit from structured workflow.