Go's standard library is solid. The ecosystem is mature. But none of that protects you from leaked secrets, vulnerable dependencies. Security tooling fills the gap. The good news: the best tools in this space are open-source, free, and take about 1-10 minutes to set up. Here are four that punch way above their weight — what they do, why they matter, and how to drop them into your workflow today. 1. Gitleaks — The Secret Scanner That Doesn't Sleep ⭐ 26k stars · gitleaks.io Gitleaks scans your git history (yes, the whole thing) and your working tree for leaked secrets — API keys, AWS credentials, JWTs, private keys, the whole rogues' gallery. It's basically the de facto standard. gitleaks detect --source . -v Enter fullscreen mode Exit fullscreen mode That's the whole command. Run it, and within seconds it tells you exactly which commit, which file, which line you screwed up. 2. Semgrep — Grep, But It Actually Understands Code ⭐ 15k stars · semgrep.dev Regular grep is a hammer. Semgrep is a scalpel.…