The Fix Was Committed. The Old Value Kept Running.

Originally published on hexisteme notes . I deleted three ambient API keys from my shell profile. Then I ran the standard clean-room check — spawn a shell with no inherited environment at all, env -i HOME="$HOME" /bin/zsh -lc 'echo "${VARNAME:-unset}"' , and read unset back for all three. That command doesn't lie: a shell started with an empty environment can only see what the current profile puts there, so if it reports the variable missing, the profile is clean. I closed the loop, reconnected my tools, and moved on. Minutes later I reconnected a review tool I run for cross-vendor sanity checks, and it came back healthy — with eight providers registered, one of them authenticated with a key I had just deleted. Not a cached credential from an old response. A live, working authentication, using a value that no longer existed anywhere on disk. The fix was committed. The old value kept running. Two different questions that sound like one "Did I fix the config?" and "Is the fix in effect?" collapse into a single question in your head, because in the common case they're the same event: you edit a file, the next thing that reads the file gets the new value, done. env -i answers the first question perfectly. It says nothing about the second, because it doesn't test any process that already exists — it only tests a brand-new one, freshly spawned, that has no choice but to read the current profile because it has no environment of its own yet. Every process that was already running before you made the edit is a different story. It read the profile once, at its own startup, copied whatever it found into its own memory, and has not looked at the file since. From that point forward it is not a reader of your shell profile — it is a cache of it. And caches don't invalidate themselves. Finding the actual culprit The process holding the stale value here was the editor I was working in — the same long-lived process that hosts my coding sessions and manages tool connections through M