Claude Context Pollution Is Real — This Is How I Solved It

I keep a repo of markdown files that I use as context for Claude. Notes about how I write, project details, decisions I've made and why, things I want Claude to know about me so I don't have to re-explain them every session. It works well. Until it doesn't. The problem showed up when I started adding job-hunting material - cover letter drafts, notes about specific companies, salary expectations, the whole thing. Suddenly that information was leaking into unrelated sessions. I'd be thinking through a technical essay and Claude would have all that hiring context loaded for no reason.