`CREWAI_TRACING_ENABLED=false` is the project's no, and nothing overrules it,
not even a run `crewai eval` started.
- `crewai eval` at a terminal asks to turn tracing on before running the crew.
A yes writes it to the project's `.env`; a no runs nothing (exit 0,
`eval_stopped:declined`). With no terminal it stops and says how to turn it
on (`eval_stopped:tracing_off`), which a coding agent can do itself.
- The run app's Evaluate on an untraced run asks the same question in a modal
(TurnTracingOnScreen) before running the crew again. Otherwise it still runs
it again with no question.
- crewAI's tracing respects an explicit off again: `should_enable_tracing`
checks it before a run `crewai eval` started, and `execution._tracing_disabled`
is back to what main has.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
