Sourced from rails_semantic_logger's changelog.

[5.0.0] - 2026-06-29

• Bump the major version to keep it in lock step with Semantic Logger v5, and require semantic_logger >= 5.0.
• Appenders: add a config.rails_semantic_logger.appenders do |appenders| ... end block to declare log destinations by context. The method names the context (when) and the args name the destination (where): add is always created at init, add_server applies when serving requests (defaults to $stdout), and add_console applies inside the Rails console (defaults to $stderr). This replaces the single default log/<env>.log file appender plus the format/filter/ap_options options.
• Appenders: deprecate the format, ap_options, filter, console_logger, and add_file_appender options in favor of the appenders block. They still work but warn via the deprecator and will be removed in v6.
• Forking: rely on Semantic Logger v5's automatic reopen-after-fork (the Process._fork / Process.daemon hook reopens appenders in the child, once per process). Remove the now-redundant manual reopen hooks for Passenger, Resque, Spring, and SolidQueue, the rack/rackup daemonize_app overrides, and the DelayedJob plugin. Apps that opt out with SemanticLogger.reopen_on_fork = false are responsible for reopening themselves.
• ActionMailer: match Rails' subscribe_log_level gating so the deliver and process events are only emitted when the logger is at debug level, and log process at debug to match upstream.
• ActionMailer: include the full encoded message (mail) in the deliver payload, mirroring Rails' debug-level mail dump.
• ActionMailer: remove dead code from the log subscriber (the inapplicable log_arguments? branch and an unreachable, self-recursive date-string branch).
• ActionView: add gc_time to the render_template, render_partial, and render_collection payloads, matching the GC timing Rails now reports.
• ActionView: emit a Rendered layout completion event (with duration, allocations, and gc_time) to mirror Rails' render_layout subscriber. The upstream ActionView log subscriber is identical across Rails 7.2 / 8.0 / 8.1, so no version-specific behavior is required.
• ActionView: log under the name ActionView::Base (via ActionView::Base.logger) instead of ActionView, for consistency with the ActiveRecord::Base, ActiveJob::Base, ActionMailer::Base, and ActionController::Base logger names.
• ActiveJob: add the enqueue_retry, retry_stopped, and discard events (present in Rails since before 7.2 but never reimplemented here, so they previously produced no output).
• ActiveJob: add the Rails 8.1 Continuation events (interrupt, resume, step_skipped, step_started, step). The handlers are defined unconditionally; on Rails < 8.1 those notifications are never emitted, so no version-specific behavior is required.
• ActiveJob: fall back to job.enqueue_error when no exception_object is present, matching Rails, so a failed enqueue is no longer logged as a success.
• ActiveJob: add the aborted branch to perform, logging a halted before_perform callback as an error to match upstream.
• ActiveJob: add enqueued_at and scheduled_at to the event payload (when applicable), plus executions/wait on retry events and step_name/step_cursor on Continuation step events.
• ActiveRecord: handle the strict_loading_violation event (previously dropped entirely when our subscriber replaced Rails'), emitting the violation message plus a structured payload (owner, association, and class for non-polymorphic reflections).
• ActiveRecord: add lock_wait to the sql payload for async queries, matching Rails.
• ActiveRecord: only set cached in the sql payload when the result was served from the query cache, instead of writing cached: nil on every query.
• ActiveRecord: filter sensitive bind values via Rails' own ActiveRecord::Base.inspection_filter

... (truncated)

• 001d671 README: move container platform recipe to docs
• f11ebd6 Rewrite README to match docs and the appenders configuration
• bf4c700 Trim README: move upgrade notes to docs, condense examples
• 2ca6cf6 Prepare v5.0.0 release: use rubygems semantic_logger 5.0
• 6756a86 Merge pull request #314 from reidmorrison/fix/activesupport-logger-hijack-141
• aabc6ec Stop hijacking ActiveSupport::Logger.new when a destination is given
• 1b5a698 Merge pull request #313 from reidmorrison/feature/subscriber-metrics
• c237585 Pass class/module constants to SemanticLogger[] instead of strings
• 2ebe76a ActionView: log under ActionView::Base name
• c956f1b Emit prototype metrics for info/warn/error log subscriber entries
• Additional commits viewable in compare view