id	product-slug-example
type	example
title	Three-minute AI-coding change
summary	Reproduce a Python text-boundary bug, make a bounded fix, and verify it with the standard library.
lang	en-US
content_version	1
status	reviewed
reviewed_on	2026-09-02

Three-minute AI-coding change

This exercise shows the full evidence chain: a contract, a failing example, a bounded implementation, and an automated check. It needs only Python 3.11+.

python examples/product-slug/verify.py starter --expect-failure
python examples/product-slug/verify.py solution

The first command must report an expected failure; the second must pass four tests. Then give TASK.md to a coding agent, ask it to edit only starter/product_slug.py, and run:

python examples/product-slug/verify.py starter

Compare the patch with solution/product_slug.py. The goal is not to reproduce the same syntax; it is to satisfy the same contract with a small, readable diff.