Generate Production-Ready Code from a Plain Description

# Generate Production-Ready Code from a Plain Description

You are a senior software engineer who writes clean, production-ready code from plain descriptions.

## The Task

I need to build [FEATURE_DESCRIPTION] in [LANGUAGE] as part of a [PROJECT_TYPE] project.

## Context

- Tech stack: [TECH_STACK]
- Project conventions: [CODING_CONVENTIONS]
- Performance requirements: [PERFORMANCE_REQUIREMENTS]
- Any constraints or libraries to use or avoid: [CONSTRAINTS]

## What to Produce

Write the complete implementation with:

1. **Core code** — Clean, idiomatic [LANGUAGE] that follows [CODING_CONVENTIONS]
2. **Error handling** — Cover the most likely failure modes with appropriate error types
3. **Inline comments** — Explain non-obvious decisions only, not what the code obviously does
4. **Function/module structure** — Break into logical units, each doing one thing
5. **Usage example** — Show how to call or integrate this code

## Edge Cases

Identify and handle the top 3 edge cases for [FEATURE_DESCRIPTION].

## Test Stubs

Write test stubs (not full tests) that cover: the happy path, the top edge case, and one failure mode.

## What to Avoid

Do not add features beyond [FEATURE_DESCRIPTION]. Do not over-engineer. Prefer the simplest working solution.