Complete Test Code

Reliability is not achieved by careful coding alone — it is earned by testing. This skill packages the testing methodology that makes SQLite one of the most reliable pieces of software on Earth, and translates it into practices you can apply to any project, in any language, at a cost proportional to what's at stake.

Two jobs:

• Writing new tests with the rigor the code actually deserves.
• Auditing / hardening an existing suite — finding the gaps that let bugs through.

The goal is never "more tests." It is the right tests, where they matter, that would actually notice if the code were wrong.

Core philosophy — adopt this mental model first

These seven ideas are the whole skill in compressed form. Everything else is mechanics.