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notes worth keeping.

dirty frag field notes: from a patched server that was "safe" (a public Dirty Frag PoC failed, so the server looked safe. a cheap DeepSeek-V4-Flash feedback loop found the missed path -> fcrypt mismatch, nscd cache, and root in ~90 minutes.) → fish startup: 160ms -> 24ms by deleting startup work (profiling my fish shell startup and removing the stuff that had no business running every time a shell opened) →