Add novelty rejection sampling feature #287
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This commit introduces a novelty checking system that uses embeddings and LLM-based judging to ensure programs added to the database are meaningfully different from existing ones in their island. Changes: - Added EmbeddingClient class for computing code embeddings using OpenAI/Azure models - Added novelty judge prompts for LLM-based similarity assessment - Modified ProgramDatabase to support novelty checking before adding programs - Added embedding vector field to Program dataclass - Added configuration options for embedding model, novelty LLM, and similarity threshold - Integrated novelty LLM ensemble in controller setup - Updated example config with novelty checking parameters The novelty check uses cosine similarity of embeddings as a first pass, then uses an LLM judge to determine if programs exceeding the similarity threshold are truly novel or just trivial variations. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
- Fix novelty check in database.py to pass program.id instead of program object - Fix missing self parameter in embedding.py _get_client_model method - Fix serialization error by clearing novelty_llm before config deepcopy - Update function_minimization config for testing with different models 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
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#277 Implemented novelty rejection sampling (as used in SakanaAI/ShinkaEvolve) and tested it on the function minimization example for 10 iterations. The combined score improved from 1.4975 -> 1.4995 (distance score 0.9950 -> 0.9995, value score unchanged). I’d appreciate any feedback or suggestions on this PR.
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Test plan