You wrote the post yourself. Sunday morning, two coffees, no assistant. On Monday a reader pastes it into an AI detector, it lights up red, and now you are in a comment thread defending your own sentences. Or the reverse: you used an LLM for a first draft and it reads like every other LLM draft, smooth, confident, and dead. Both problems have the same root, and neither is solved by the “undetectable AI humanizer” tools the internet keeps selling you.

You clone a repo, open it in your editor, and your AI assistant starts indexing it. You install a Claude skill or an MCP server someone shared. You add a dependency. Every one of those is a moment where something untrusted touches your machine, and almost nobody runs a check first. SecKit is the pre-flight you run before any of it: one script, every platform.

You committed an API key by accident. You notice, delete the line, commit again, and push. Crisis averted, right? No. That key is still sitting in your git history, one git log -p away from anyone who clones the repo. A new commit only adds a layer on top. It never removes the old one.

You’re debugging a failing API call. Frustrated, you paste your key straight into the chat with GitHub Copilot or Claude to get a faster answer. Feels harmless, right? It’s not. And the problem goes deeper than you think, your AI assistant might already be reading your .env file without you even knowing.