Introducing activesupport-logger

🏷️ introduction activesupport-logger

This backport makes Rails 8 ActiveSupport logger behavior available to older supported Rails applications. It includes thread-local severity handling and formatter behavior. The README recommends integrating through activesupport-tagged_logging or activesupport-broadcast_logger so the dependencies load in the required order.

Read the upstream README for installation and usage, or browse the project repository.