Shows how to declare a boolean IsError param (regex (?i)error, kind boolean, no capture group) that's true/false on every log line, using the boolean param kind added in ticket 018. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XFUNZwCvz3kcod3352ZR2o