Add example for logging to multiple projects with OTEL tracing #67
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slavinnj-bt
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documentation
clutchski
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Dec 30, 2025
| model2 = "claude-sonnet-4" | ||
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| # check for API keys | ||
| unless ENV["OPENAI_API_KEY"] && ENV["ANTHROPIC_API_KEY"] |
clutchski
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Dec 30, 2025
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We can achieve this in a simpler way. You only need to set the braintrust.parent tag on a span and then it will get sent to that project. See here.
https://gist.github.com/clutchski/74fa36bfb62301dad88924ce39449552
What we should do is have some nice helper functions to do this:
- e.g.
set_parent(span, 'project_id:1243')orset_parent(span, Parent.project_id("123"))
Also in general, multiple tracer providers isn't really advisable because our customers instrumentation won't look them up, they'll just use the global tracer provider.
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We recommend considering "...projects analogous to an AI feature in your application." Customers may have multiple projects defined for different features in the same application, especially for large monolithic apps. This PR creates an example showing multiple OTEL tracer providers, each scoped to a non-global state and a separate Braintrust project. It also makes some updates to the README, including for already existing tracing and eval examples.