Julewire Core

julewire-core is the synchronous structured logging runtime behind Julewire.

It builds provider-neutral records, execution context, propagated carry, non-propagated attributes, final summaries, processor chains, and synchronous direct outputs. It does not know about app frameworks, privacy policy, provider schemas, async queues, or delivery.

Install

gem "julewire-core"

Quickstart

Julewire.configure do |config|
  config.destinations.use(:default, output: $stdout)
end

Julewire.with_execution(type: :job, id: "job-1") do
  Julewire.context.add(tenant_id: "tenant-1")
  Julewire.summary.increment(:records_seen)

  Julewire.measure(:process_record) do
    Julewire.emit("processed record", id: 123)
  end
end

By default, direct output is newline-delimited JSON.

Field Bags

Bag	Use it for	Propagates?	Default JSON?
context	queryable facts copied onto records in the current scope	yes	yes
carry	hidden forwarding metadata for integrations and formatters	yes	no
neutral	provider-neutral formatter-coordination facts	no	no
attributes	integration and application namespaces	no	yes
summary	final-only counters, timings, and completion facts	no	summary only
labels	operator-safe routing/grouping metadata	no	yes
metrics	numeric measurements such as duration	no	yes

Docs

• Quickstart
• Configuration
• Advanced Configuration
• Context and Propagation
• Instrumentation Cheatsheet
• Attribute Keys
• Records and Data Policy
• Outputs and Lifecycle
• Developer Tail
• Health Schema
• Security and Wire Keys
• Extension Contracts
• Extensions and API
• Record Sources
• Internals
• Development

Runtime Promise

Julewire is best-effort logging infrastructure. StandardError failures inside Julewire's own normalization, processing, formatting, encoding, and output path are contained so application code keeps running.

Core stays synchronous. Custom destinations own async queues, files, fanout, batching, retries, and delivery health.