What maintaining your own small library teaches you

Publishing a small library — barely a hundred lines — taught me more about software responsibility than most of my larger private projects. Because the moment something has users, even two, the job changes.

What changes with strangers

Semver becomes real. In private code, I rename freely. In a published package, a renamed function is a broken build on someone else's machine. Version numbers stop being decoration and become promises.

Documentation is the product. Users experience the README first and the code never. Publishing taught me that clarity of the interface matters more than elegance of the implementation.

Issues are gifts in disguise. My first reaction to a bug report was embarrassment. The correct reaction: someone cared enough to try it, and told me where it breaks. Bug reports are free testing from people I never hired.

The uncomfortable lessons

• I now read my own library's README as a stranger would, and fix what confuses
• I version like it's a contract, because it is
• I say no to feature requests that bloat a small, sharp tool

Even if nobody ever adopts your package, publishing one honestly — with a real changelog, real docs, real versions — is a masterclass in software being a promise, not just a program.