Claude Code's Bash permission checker rejects \${VAR} parameter
substitution in skill ! commands. Replace all occurrences with \$VAR
(identical shell expansion) across log, reflect-logs, and
distill-best-practices skills. Rewrite \${VAR:-default} to use
test -n / || pattern instead.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>