Files
hermes-agent/tools
kshitij 222465d847 refactor(tools): unify probe caches and dedupe the exclusion log
/simplify-code findings on the full PR diff:

- _is_usable_python had the same sticky-failure bug the previous commit
  fixed in _python_environment_prefix: lru_cache pinned a transient
  probe failure (fork pressure, timeout) as False forever, silently
  locking project mode to sys.executable. Both probes now share a
  success-only bounded dict cache via _cache_probe_result() with FIFO
  eviction at _PROBE_CACHE_MAX (the old < cap guard stopped caching new
  entries instead of evicting, re-probing entry 33+ on every call).
- The hermes-root-omitted logger.info fired on every external-env call
  in project mode; now deduped once per interpreter path per process
  (matching the tirith/mcp warn-once convention).
- Regression test: _is_usable_python probe failures are retried, not
  cached (mutation-verified).
2026-08-12 17:42:34 +05:30
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