Round 2 review found the function-level doc-comment still referenced the
old fs::exists() (now replaced by try_exists().unwrap_or(true) in commit
2baa846). One-line clarification — describes the conservative-on-Err
semantics so future readers don't reintroduce the data-safety bug.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>