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Add GRPO fine-tuning notebook for Qwen3.5-0.8B
Browse filesTrains Qwen3.5-0.8B with GRPO on the ReplicaLab negotiation environment.
Includes fixed action parser (invalid action_type validation, null handling,
int coercion, <think> tag stripping) and reward_fn with proper native type
casting to avoid numpy serialization errors.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>