v1.9.1

Changes

Bug Fixes

• Prevent null dereference when finalizing streaming responses with no current attempt
• packages/polyglot/src/Inference/Data/InferenceExecution.php
  • Null-safe access to currentAttempt in withFinalizedPartialResponse() and withFailedFinalizedResponse()

• packages/polyglot/src/Inference/Data/InferenceAttempt.php

  • Null-safe withFinalizedPartialResponse() using empty PartialInferenceResponseList when needed

• Console display stability in evals

• packages/evals/src/Console/Display.php
  • Replaced invalid ImmutableDataMap::except() usage with safe filtering of toArray() output
  • Fixed constant name COLOR::BOLD → Color::BOLD

Behavior/Compatibility

• Groq driver request body cleanup
• packages/polyglot/src/Inference/Drivers/Groq/GroqBodyFormat.php
  • Removed redundant max_tokens → max_completion_tokens conversion (already handled by parent)

Immutability & Usage Accounting

• Immutable accumulation for usage data to avoid inadvertent mutation/double-counting
• packages/polyglot/src/Inference/InferenceResponseFactory.php
  • Use withAccumulated(...) when combining partial usage
• packages/addons/src/StepByStep/State/Traits/HandlesUsage.php
  • Replace clone+mutate with withAccumulated(...)
• packages/evals/src/Traits/Experiment/HandlesAccess.php
  • Compute experiment usage on demand by accumulating execution usages immutably
• packages/evals/src/Experiment.php
  • Removed cached $usage and post-run accumulator; observations/summary rely on computed usage

Notes

• This release focuses on correctness and immutability:
• Eliminates potential fatals in streaming finalization and console display
• Standardizes usage accumulation to immutable patterns across modules