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0.6

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0.6.0
Fiddler Strands Agent SDK
April 14, 2026
  • New Features
    • clear_llm_context() function: New convenience function to explicitly remove LLM context from a Model instance, preventing faithfulness evaluation on subsequent non-RAG spans. In multi-step agent workflows, context set after a RAG retrieval step previously leaked into later non-RAG LLM calls (tool planning, routing, etc.), causing unintended faithfulness evaluation. set_llm_context(model, None) also now clears context.
    • Python 3.14 support: Added Python 3.14 to the CI test matrix and PyPI classifiers. All runtime dependencies have compatible wheels.
    • Fiddler attributes bridged to Strands trace_attributes: Custom span and session attributes set via set_span_attributes() and set_session_attributes() are now bridged to Strands’ native trace_attributes mechanism, enabling propagation through the Strands telemetry pipeline without custom hook plumbing for every span type.
  • Changes
    • strands-agents floor bumped from >=1.10.0 to >=1.19.0: Required to align with the Strands telemetry features the SDK now consumes. Users on Strands 1.10.x–1.18.x must upgrade to at least strands-agents 1.19.0.
    • Extended strands-agents upper bound to <=1.33.0: Tested compatibility extended to support newer Strands releases.
    • Bumps fiddler-otel dependency to 1.1.1 (gains add_session_attributes() support for all OTel primitive value types — str, bool, int, float, and homogeneous sequences — previously restricted to str).
  • Bug Fixes
    • Defensive guard for trace_attributes access: Added a defensive check before accessing trace_attributes to prevent attribute errors when bridging Fiddler attributes to Strands telemetry on agents that have not yet initialized the field.

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0.5

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0.5.0
Fiddler Strands Agent SDK
March 26, 2026
  • Initial PyPI Release
    • First version-tagged build of fiddler-strands published to PyPI from the consolidated fiddler-sdk monorepo (pip install fiddler-strands).
    • Includes all functionality from the 0.4.0 development build (auto-instrumentation, conversation tracking, session and span attributes, LLM context management, and tool-definition tracing). Version 0.4.0 was never published to PyPI.

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0.4

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0.4.0
Fiddler Strands Agent SDK
December 12, 2025
  • Enhancements
    • Tool Definition Tracing: Added gen_ai.tool.definitions span attribute to all child spans, providing visibility into tool schemas within agent traces.
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0.3.0
Fiddler Strands Agent SDK
November 17, 2025
  • Enhancements
    • API Export Fix: Added get_llm_context to module exports — previously available but not importable from the top-level package.
    • Documentation: Added comprehensive docstrings to all critical public APIs to support automatic documentation generation.
    • Examples: Fixed missing example dependencies and Fiddler configuration setup.
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0.2.0
Fiddler Strands Agent SDK
November 11, 2025
  • Enhancements
    • LLM Context Management: New set_llm_context() and get_llm_context() functions for setting additional context for LLM processing within Strands agent workflows.
    • System Prompt Telemetry: System prompts are now included as part of telemetry events for backend processing.
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0.1.0
Fiddler Strands Agent SDK
November 10, 2025
  • Initial Release
    • Core StrandsAgentInstrumentor with instrument() and uninstrument() for automatic OpenTelemetry instrumentation of Strands agents.
    • Conversation Tracking: set_conversation_id() and get_conversation_id() for multi-turn conversation tracking.
    • Session Attributes: set_session_attributes() and get_session_attributes() for adding custom metadata to trace sessions.
    • Span Attributes: set_span_attributes() and get_span_attributes() for adding custom metadata to individual spans.
    • Available as pip install fiddler-strands.