[Luca Forstner (lforst)]

• When you call init_logger(project="..."), the SDK looks the project up by name and creates it if it doesn't exist yet. This happens lazily, the first time the logger actually needs the project ID.
• Until now there was no way to say which project group a newly created project should go into. Logger-created projects always landed ungrouped.
• init_logger now accepts an experimental _create_in_project_group option. When it is set, the SDK passes project_group_name along with the project name when it registers the project.
  • If the project already exists but belongs to a different group, the backend rejects the request with a 409. The SDK raises that error and does not retry without the group.
  • The option is ignored when project_id is passed, because no project is created in that case.
• The group name is stored with the logger's other lazy project-resolution arguments. That means it is kept when a logger or span is exported and later resolved somewhere else, and it stays compatible with span exports from the JS SDK.
• The option has a leading underscore because project_group_name isn't in the pinned OpenAPI schema yet. The SDK uses a local extension of the generated request type until it is.

import braintrust

logger = braintrust.init_logger(
    project="my-project",
    _create_in_project_group="my-group",  # new: create the project inside this existing project group
)

[chatgpt-codex-connector]

Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-01T20:03:51.627046Z	df5e686	New commits

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[Abhijeet Prasad (AbhiPrasad)]

this will break tests, means we dont lazy load the api.

[Abhijeet Prasad (AbhiPrasad)]

will take this over to fix CI

[chatgpt-codex-connector]

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Reviewed commit: df5e6867fc

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[chatgpt-codex-connector]

Preserve the group in exported OTel contexts

When an unresolved span from a grouped logger is passed to braintrust.otel.context_from_span_export(), that helper still converts compute_object_metadata_args to project_name:<name> via _get_braintrust_parent() and drops project_group_name. The receiving service will therefore register or route the project outside the requested group—the exact case this new special handling avoids for direct injection. Resolve the grouped project to a project_id in this export-to-OTel path as well.

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