feat: Add Tracing Support For Anthropic/Claude Code With Arize/Phoenix Integration #12987
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why do we need custom handling here? @ialisaleh
the message payload across api's is already standardized to the standard logging payload format, which would then be emitted to all integrations
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Title
This pull request adds tracing support for Anthropic/Claude Code in the LiteLLM Proxy, integrating with Arize/Phoenix for enhanced observability.
Relevant issues
None
Pre-Submission checklist
Please complete all items before asking a LiteLLM maintainer to review your PR
tests/litellm/directory, Adding at least 1 test is a hard requirement - see detailsmake test-unitType
🆕 New Feature
Changes
I have added multiple spans to represent internal Claude Code prompts and a final output span for end-to-end visibility.
I have integrated proper JSON detection and rendering for structured Claude outputs.
I have ensured the span ordering, which reflects logical execution.
I have improved observability for Arize/Phoenix integrations by capturing internal reasoning steps for debugging and monitoring.
Anthropic / Claude Code Trace - Internal Prompt
Anthropic / Claude Code Trace - Final Output