Prompt Libraries

Introduction

Prompt libraries are curated, reusable prompts shared across an organisation. They turn one team's wins into everyone's defaults.

Beginner analogy: Like Stack Overflow inside your company — proven solutions reused.

Understanding the topic

Core concepts to understand:

• Central repo with categories, search, evals attached.
• Each prompt: description, owner, version, eval, examples.
• Tools: LangChain Hub, OpenPrompt, internal Notion/git.
• Promotes consistency & safety across teams.

Syntax reference

Visual workflow / architecture:

Library/
  customer_support/
    triage.md (v3)
    reply_draft.md (v5)
  marketing/
    blog_outline.md (v2)
    headline_ab.md (v1)

Real-world use

Shopify, Stripe, and Klarna all maintain internal prompt libraries — saves duplicated effort and centralises governance.

Best practices

• Curate & review prompts before publishing.
• Require evals before adding to library.
• Track usage per prompt.

Hands-on exercise

Interview preparation — practice these questions:

• Q1. Why a central prompt library?
• Q2. What metadata per prompt?
• Q3. Tools available?
• Q4. Risks of stale library prompts?