Prompt Library

Prompt Library

When to Use This Skill

Use this skill when you need to:

• Build an organized library of reusable AI prompts for business tasks
• Document prompts with variables, examples, and usage instructions
• Create a quality scoring system for prompt effectiveness
• Standardize prompt usage across a team or workflow

DO NOT use this skill for writing individual prompts, prompt engineering tutorials, or AI tool comparisons. This is for organizing and documenting a collection of prompts.

Core Principle

A PROMPT LIBRARY IS A BUSINESS ASSET — EVERY PROMPT SHOULD BE DOCUMENTED, TESTED, AND VERSIONED SO ANYONE CAN USE IT AND GET CONSISTENT RESULTS.

Phase 1: Brief

Required Inputs

GATE: Confirm the brief before designing the library structure.

Phase 2: Design the Library

Category Structure

Organize prompts by business function:

prompt-library/
├── content/
│   ├── blog-post-draft.md
│   ├── social-media-caption.md
│   └── email-newsletter.md
├── marketing/
│   ├── ad-copy.md
│   ├── landing-page-copy.md
│   └── lead-magnet-outline.md
├── operations/
│   ├── meeting-summary.md
│   ├── process-documentation.md
│   └── project-brief.md
├── finance/
│   ├── invoice-reminder.md
│   └── expense-report.md
├── customer/
│   ├── support-response.md
│   ├── review-reply.md
│   └── onboarding-email.md
└── research/
    ├── competitor-analysis.md
    └── market-research.md

Prompt Card Template

Every prompt in the library uses this format:

# [Prompt Name]

**Category:** [Business function]
**AI Tool:** [Claude / ChatGPT / Any]
**Version:** [1.0]
**Last tested:** [Date]
**Quality score:** [1-5]

## Purpose
[One sentence: what this prompt produces]

## Variables
- {{VARIABLE_1}}: [Description, example]
- {{VARIABLE_2}}: [Description, example]

## Prompt
[The full prompt text with {{VARIABLES}} marked]

## Example Output
[A sample of what good output looks like]

## Tips
- [Usage tip 1]
- [Usage tip 2]

## Changelog
- v1.0 — Initial version

GATE: Confirm the structure and template before populating the library.

Phase 3: Populate

Prompt Writing Rules

• One prompt, one purpose — do not combine tasks. A prompt that writes AND edits AND formats is three prompts.
• Variables are explicit — use {{DOUBLE_BRACES}} for every input the user must provide. Never leave implicit assumptions.
• Include constraints — word count, tone, format, what to avoid. Constraints improve output quality.
• Show the ideal output — include one example of what a good response looks like. This sets the quality bar.
• Version everything — when you improve a prompt, increment the version and note what changed.

Quality Scoring Rubric

Prompt Iteration Process

1. Write the initial prompt (v1.0)
2. Test with 3 different inputs
3. Score the outputs
4. Identify weaknesses (too long, wrong tone, missing elements)
5. Revise the prompt (v1.1)
6. Retest and rescore
7. Repeat until score reaches 4+

Phase 4: Polish

1. Library Maintenance

• Monthly review: Test top 10 most-used prompts with current AI model versions
• Quarterly audit: Archive prompts not used in 90 days, add new ones for emerging needs
• Version control: Never overwrite — always create a new version and note changes
• Usage tracking: Note which prompts get used most and which produce the best results

2. Team Sharing Guide (if applicable)

• Store in a shared location (Notion, shared folder, repo)
• Create a quick-start guide: how to find prompts, how to use variables, how to submit new prompts
• Designate a prompt librarian (or rotate the role)
• Set up a feedback mechanism: "This prompt worked / didn't work because..."

3. Quality Checklist

## Prompt Library Checklist

- [ ] Categories cover all major business functions
- [ ] Every prompt uses the standard card template
- [ ] All variables are marked with {{DOUBLE_BRACES}} and described
- [ ] Each prompt includes at least one example output
- [ ] Quality scores are assigned and up to date
- [ ] Prompts are versioned with changelogs
- [ ] Library is organized in a searchable structure
- [ ] Monthly review cadence is scheduled
- [ ] Top prompts are tested with current AI model versions
- [ ] Archive process exists for unused prompts

Example

Prompt card:

# Social Media Caption

**Category:** Content
**AI Tool:** Claude
**Version:** 1.2
**Last tested:** 2026-02-15
**Quality score:** 4

## Purpose
Writes a social media caption for Instagram or LinkedIn from a topic and key message.

## Variables
- {{PLATFORM}}: Instagram or LinkedIn
- {{TOPIC}}: The subject of the post
- {{KEY_MESSAGE}}: The one point you want to make
- {{TONE}}: casual, professional, motivational, witty
- {{CTA}}: What you want the reader to do

## Prompt
Write a {{PLATFORM}} caption about {{TOPIC}}.

Key message: {{KEY_MESSAGE}}
Tone: {{TONE}}
Include a call to action: {{CTA}}

Requirements:
- Under 150 words for Instagram, under 200 for LinkedIn
- Open with a hook (question, bold statement, or surprising fact)
- Use line breaks for readability
- End with the CTA
- No hashtags in the body (I will add them separately)

## Example Output
"Most solopreneurs spend 6 hours a week on invoicing.

Six. Hours.

That is an entire workday every month spent on paperwork instead of revenue.

I cut that to 45 minutes by automating three things:
→ Invoice generation from project completion
→ Automatic payment reminders
→ Expense categorization

The tools cost $30/month total. The time savings are worth $1,200.

Drop a 🔥 if you want the exact setup."

## Changelog
- v1.2 — Added "no hashtags" constraint, improved hook instruction
- v1.1 — Added platform-specific word count limits
- v1.0 — Initial version

Anti-Patterns

• Hoarding untested prompts — a library of 50 untested prompts is a junk drawer. Test and score before adding.
• No variables — hardcoded details make prompts single-use. Extract every changeable element into a variable.
• No examples — without a sample output, quality is subjective. Always show what good looks like.
• Never updating — AI models change. A prompt that worked 6 months ago may not work as well today. Review regularly.
• Overcomplicating — a prompt that requires 15 variables is too complex. Break it into multiple simpler prompts.

Recovery

• Too many prompts to organize: Start by categorizing the 10 you use most. Archive everything else and add as needed.
• Prompts produce inconsistent results: Add more constraints (word count, format, tone, examples). Constraints reduce variance.
• Team members not using the library: The library is too hard to access or search. Simplify structure and create a quick-start guide.
• Quality scores are all low: The prompts may be too broad. Narrow the purpose of each prompt to one specific output.