[lmolkova]

Stacked on #5819.

Fixes #3350 for the new experimental method; see also #2432.

start_as_current_span(..., context=ctx) uses ctx only to find the parent. Inside the block, the current context is the caller's implicit context plus the span, so values in ctx such as baggage or custom keys aren't visible. That behavior is documented as intended for start_as_current_span and can't change there without breaking users.

_start_as_current_typed_span is new, so it can do what users expect: when context is passed, it becomes the current context for the block, with the new span set in it.

For tracers without span type support, the call is delegated to that tracer's start_as_current_span, so its existing behavior applies there.

[opentelemetry-pr-dashboard]

Pull request dashboard status

Waiting on the author · refreshed 2026-10-26 22:45 UTC

Move out of draft to request review.

Status above doesn't look right?

• Just replied or pushed? Anything around or after the refresh time above may not be picked up yet — give it a few minutes.
• Anything look wrong? Report it with what you expected; it helps us improve the dashboard.