not using version control (or using it wrong)

(common gotcha)

what happened

you make a change that breaks everything. you can't undo it because you don't have version control, or you've been committing everything to main with messages like "fix" and "update" and "asdf." you can't find the last working version.

why it's a gotcha

without version control, every change is permanent and irreversible. with bad version control, every change is technically reversible but practically impossible to find. both leave you stranded when something breaks, which it will.

the fix

use git from the start of every project. commit often with descriptive messages. use branches for features. this isn't about best practices — it's about having a time machine for your code. the 30 seconds per commit saves you hours of "wait, what did i change?" be careful though: git history remembers everything, including secrets you accidentally committed. version control also lets you bisect bugs — something that would have saved hours during the esp32-debugging-saga.