10 Time-Saving Prompts for GitHub Copilot

These aren’t “demo prompts.” They’re practical, real-world instructions you can drop into comments or Copilot Chat to ship faster, debug quicker, and reduce repetitive work.

1) Generate a complete API endpoint

# Create a REST API endpoint for user registration
# Requirements:
# - Validate email and password
# - Hash password before saving
# - Return proper error messages
# - Use Express.js

👉 Saves time on boilerplate + validation logic.

2) Convert logic between languages

Convert this Python function into JavaScript.
Keep the same logic and edge case handling:
[paste code]

👉 Useful when switching stacks or learning.

3) Debug an error quickly

This code throws an error:
[paste code + error]

Explain the issue and fix it.

👉 Faster than searching Stack Overflow.

4) Write unit tests automatically

Write unit tests for this function.
Include:
- edge cases
- invalid inputs
- expected outputs

👉 Covers cases you might forget.

5) Refactor messy code

Refactor this code to:
- improve readability
- reduce duplication
- follow best practices

👉 Great for cleaning legacy code.

6) Add error handling

# Add proper error handling to this function:
# - try/catch
# - meaningful error messages
# - fallback behavior

👉 Turns fragile code into production-ready code.

7) Optimize performance

Optimize this code for performance.
Focus on:
- time complexity
- memory usage

👉 Especially useful for loops, queries, and data processing.

8) Generate database queries

-- Write a SQL query to:
-- Get top 5 customers by total purchase
-- Include name, total spent, and last purchase date

👉 Saves time on writing complex queries.

9) Build a small feature from scratch

Create a feature to upload files:
- frontend: React
- backend: Node.js
- store files locally
- show upload progress

👉 Quickly scaffolds full functionality.

10) Explain unfamiliar code

Explain this code step-by-step.
Focus on:
- what it does
- how data flows
- key logic

👉 Great for onboarding or debugging.