Persistent anxiety over secret leakage (.env, API keys) with no runtime guard before the damage is done

Summary

Engineers admit they constantly second-guess whether their API keys and secrets are 'genuinely secure' and recall the panic of accidentally committing sensitive info to Git, catching it only by luck. The tooling landscape they discuss (HashiCorp Vault, environment variables, generators) covers storage and rotation, but nothing watches the moment an agent or script actually reads a .env file, echoes a token, or pushes credentials to a remote — so detection happens after exposure. Secrets scanners only flag what already leaked into a repo; they cannot block a risky read or commit in real time. This is a high-anxiety, recurring, career-damaging problem for developers and small teams who now hand broad shell access to AI agents that can read secrets in milliseconds, and there is no free, local, open checkpoint that pauses secret-touching actions for approval before they execute.