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What's New in ETLantic 0.34

Status: Available in ETLantic 0.34.0. Operations, Evidence, and Production Readiness (Medallantic M6): observability providers, durable run history, event consumers, and production conformance.

Milestone name vs enterprise claim

“Production readiness” here means the M6 observability/history pilot slice. It does not mean unrestricted enterprise production. See Production readiness and CHANGELOG [Unreleased] for post-cut hardening that may land in later 0.34.x patches.

Highlights

  • Lifecycle event correlation — plan_id, region_id, backend, and facade-safe annotations on etlantic.lifecycle_event/1
  • Observability provider protocol (etlantic.observability/1) with reference JSON console and optional OpenTelemetry adapter
  • Run history providers — in-memory and file-backed reference implementations with conformance suite (create / append / read / list)
  • Event consumers — reference trend consumer; etlantic reliability quality-trends uses consumer summaries when no inline --values given
  • Profile composition — observability_providers, run_history_provider, event_consumers, observability_delivery (best_effort | durable_audit)
  • Runtime bridge — EventBus and structured logs fan out to registered providers; terminal reports include observability metadata
  • CLI — workspace .etlantic/history/ file history; etlantic report query
  • Medallantic M6 — explain_medallion_plan, layer lifecycle views, medallion_*_profile() templates
  • Migration 0.33 → 0.34 and Exit gate 0.34

Not in 0.34

  • SparkForge migration inventory (0.35 / M7)
  • First-party SQL/Delta run-history PyPI plugins
  • Multi-tenant control plane

Upgrade

Pin core and plugins to the same minor:

python -m pip install --upgrade 'etlantic==0.34.0'
python -m pip install --upgrade 'medallantic==0.34.0'

Plugin authors: pin etlantic>=0.34.0,<0.35.