Add version parameter to LLM instrumentation#1702
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dmontagu merged 3 commits intojulian/semconvs-messagefrom Feb 11, 2026
Merged
Add version parameter to LLM instrumentation#1702dmontagu merged 3 commits intojulian/semconvs-messagefrom
dmontagu merged 3 commits intojulian/semconvs-messagefrom
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Adds a `version` parameter that accepts `1`, `2`, or `[1, 2]`: - version=1 (default): legacy request_data/response_data format - version=2: structured OTel Gen AI semconv messages (gen_ai.input.messages, gen_ai.output.messages, gen_ai.system_instructions) - version=[1, 2]: both formats simultaneously for migration/testing Built on top of PR #1666 (julian/semconvs-message).
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Remove v2 semconv attributes (gen_ai.input.messages, gen_ai.system_instructions, gen_ai.output.messages) from the bedrock test snapshot since the default version=1 no longer emits them.
OpenaiChatCompletionStreamState and AnthropicMessageStreamState now emit gen_ai.output.messages when version=2 is active, matching the non-streaming behavior.
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Summary
versionparameter toinstrument_openai()andinstrument_anthropic()that accepts1,2, or[1, 2]version=1(default): legacyrequest_data/response_dataformatversion=2: structured OTel Gen AI semconv messages (gen_ai.input.messages,gen_ai.output.messages,gen_ai.system_instructions)version=[1, 2]: both formats simultaneously for migration/testingStacked on
Test plan
version=1version=2verify only semconv attributes emittedversion=[1, 2]verify both formats emitted