v2.4.29

Highlights

This release rolls up everything shipped on main since the last published GitHub release, v2.4.15, through v2.4.29.

• OpenTelemetry tracing is now much more complete across runtimes. The OTEL middleware work tightened root span parenting, preserved nanosecond timing, aligned Python/TypeScript tracing behavior, added stronger TypeScript coverage, and documented the integration path for both runtimes.
• Optional integrations and package exports are cleaner. Root imports stay lightweight, peer-backed integrations stay opt-in, TypeScript now supports direct source imports via abxbus/source and abxbus/source/*, and the runtime export surface is better aligned across Python and TypeScript.
• Cross-runtime metadata/serialization got tighter. Event result serialization, handler naming, handler metadata, and optional export behavior were aligned so forwarded/rehydrated events behave more consistently between Python and TypeScript.
• Immediate execution docs now cover parallel fan-out. The RPC-style immediate execution page now shows how to combine event_concurrency='parallel' with racing child events in both TypeScript and Python, and the pattern is covered by mirrored regression tests.
• Python and TypeScript package versions are both bumped to 2.4.29.

Example Snippets

OTEL middleware setup

import { EventBus } from 'abxbus'
import { OtelTracingMiddleware } from 'abxbus/OtelTracingMiddleware'

const bus = new EventBus('AppBus', {
  middlewares: [new OtelTracingMiddleware()],
})

Immediate-execution parallel fan-out

const settled = await Promise.allSettled([
  event.emit(SomeChildEvent1({})).done(),
  event.emit(SomeChildEvent2({})).done(),
  event.emit(SomeChildEvent3({})).done(),
])

The Python equivalent is documented with asyncio.gather(..., return_exceptions=True) in the immediate-execution guide.

Resources

• OTEL middleware docs
• Immediate Execution (RPC-style)
• Parent-Child Tracking
• TypeScript OTEL implementation
• TypeScript optional-dependency/export coverage
• Python optional-integration import coverage
• Immediate execution Python regression coverage
• Immediate execution TypeScript regression coverage
• Full compare: v2.4.15...v2.4.29

Validation

• main CI for 3ad9fd0 completed successfully:
  • Dependency Graph
  • Release State
  • pre-commit-hooks
  • test-py
  • test-ts
• Local packaging/build verification:
  • uv build
  • pnpm run build