A missing trailing backslash after the Thumbs.db:encryptable pattern
terminated the `set -l aggressive_patterns` array early. The AI-tool
patterns (.gemini*, .claude*, .antigravity*, .remember*) were then
executed as a bogus command instead of being appended to the array,
so scrub -a never actually purged them, and every scrub invocation
printed a spurious "Unknown command" error.
rootiest