What
Claude Code watches your plugin directory for new or changed plugin manifests so it can pick them up automatically. That watcher now compares each file's ctime (the time its metadata last changed) instead of its mtime (the time its content last changed) to decide whether something changed. It also gained explicit controls for how often it rescans and for coalescing rapid bursts of changes so they don't trigger repeated rescans.
Why
Using ctime instead of mtime can catch changes that don't update a file's modification time, such as permission or metadata changes, making plugin detection more reliable. The new debounce tuning helps avoid unnecessary repeated rescans when several files change in quick succession.