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Version 0.0.6 Jan 12, 2026 (ARC Explainer integration)

  • Feat: Add Player C variant with minimal prompt (Author: Cascade)
    • Created LLMPlayerC with minimal prompt containing only rules and requiring single-word response.
    • Registered Player C in variant registry.
    • Files Modified: backend/players/variant_registry.py
    • Files Added: backend/players/llm_player_c.py

Version 0.0.5 Jan 12, 2026 (ARC Explainer integration)

  • Feat: Add player persona variant support (Author: Cascade (ChatGPT 5.1))
    • Added variant registry to support multiple LLM player prompt strategies (default, A, B).
    • Created LLMPlayerB with open-ended prompt focusing on rules and survival.
    • Updated main.py to use get_player_class() to instantiate correct player variant based on player_persona parameter.
    • Files Modified: backend/main.py, backend/players/variant_registry.py
    • Files Added: backend/players/llm_player_b.py

Version 0.0.4 Dec 27, 2025 (ARC Explainer integration)

  • Prompt: Disable web search for LLM players (Author: Claude Sonnet 4.5)
    • Added explicit instruction to prevent models from performing web searches during gameplay.
    • Ensures models only use the provided game state without accessing external information.
    • Files Modified: backend/players/llm_player.py:187, backend/players/llm_player_a.py:198

Version 0.0.3 Dec 25, 2025 (ARC Explainer integration)

  • Fix: OpenRouter transforms routing for Worm Arena (Author: GPT-5)
    • OpenRouter-only transforms are routed through extra_body to avoid OpenAI SDK errors.
    • OpenAI direct calls strip transforms entirely.
    • Files Modified: backend/llm_providers.py, README.md

Version 0.0.2 Dec 11, 2025 (ARC Explainer integration)

  • Changelog alignment with ARC Explainer (Author: GPT-5.2 Extra High)
    • No SnakeBench-core code changes in this submodule for the Worm Arena Live streaming/Hall of Fame refactor; those changes live in the ARC Explainer repo and are documented in the root CHANGELOG.md.
    • This entry exists only to keep integration history consistent across changelogs.

Version 0.0.1 Dec 12, 2025 (ARC Explainer integration)

  • OpenRouter Responses defaults for OpenAI/xAI models (Author: Cascade)
    • When using OpenRouter models under the openai/* or x-ai/* namespaces with the Responses API, SnakeBench now enforces reasoning-friendly defaults to avoid runs that incur reasoning tokens but return no captured reasoning artifacts.
    • Defaults enforced (when missing): reasoning.summary: "detailed", text.verbosity: "medium", store: true, and include: ["reasoning.encrypted_content"].
    • Files Modified: backend/llm_providers.py