Removing an env-seeded credential only cleared ~/.hermes/.env and the
current process's os.environ, leaving shell-exported vars (shell profile,
systemd EnvironmentFile, launchd plist) to resurrect the entry on the
next load_pool() call. This matched the pre-#11485 codex behaviour.
Now we suppress env:<VAR> in auth.json on remove, gate _seed_from_env()
behind is_source_suppressed(), clear env:* suppressions on auth add,
and print a diagnostic pointing at the shell when the var lives there.
Applies to every env:* seeded credential (xai, deepseek, moonshot, zai,
nvidia, openrouter, anthropic, etc.), not just xai.
Reported by @teknium1 from community user 'Artificial Brain' — couldn't
remove their xAI key via hermes auth remove.
b341b19fff