Version Pinning
Domain: Package Ecosystem
🎯 Motivation
Pinning exact versions prevents a dependency update from silently breaking your project. Reproducible builds depend on pinning so the same install today and next month produces identical environments.
📋 Concrete Example
Write requests==2.31.0 in requirements.txt instead of requests. Tomorrow requests 2.32 might drop a feature you use. The pin locks the tested version until you deliberately upgrade.
🔗 Analogy
A recipe says “2 teaspoons of salt,” not “some salt.” The precise amount makes the dish turn out the same every time. “Some salt” leaves each batch to chance.