feat(search): add MLX tactic proposer for Apple Silicon#17
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Integrates the fine-tuned OpenProof Tactic 2B model (MLX 4-bit) into the BFS tactic search engine. On macOS with an MLX model installed at ~/.openproof/models/openproof-tactic-2b/, the system auto-detects and uses MLX as the default tactic proposer. Architecture: - MlxProposer talks to mlx_lm.server via OpenAI completions API - Server auto-spawned if not already running (port 8321) - Health polling with 30s timeout for model loading - Same filtering pipeline as Ollama (banned tactics, dedup) - Fallback to standard tactics if MLX unavailable New files: - crates/openproof-search/src/mlx.rs -- MlxProposer struct - Mlx variant added to TacticProposerBackend enum - Auto-detection: macOS + model dir exists -> use MLX by default - Override: OPENPROOF_TACTIC_PROPOSER=mlx|ollama|standard
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Summary
Integrates the fine-tuned OpenProof Tactic 2B model (markm39/openproof-tactic-2b, MLX 4-bit) into the BFS tactic search. Auto-detects and uses MLX on macOS when the model is installed.
Architecture
MlxProposerinopenproof-search/src/mlx.rs-- mirrorsOllamaProposerpattern~/.openproof/models/openproof-tactic-2b/exists -> default to MLXOPENPROOF_TACTIC_PROPOSER=mlx|ollama|standardTest plan
cargo clippy --workspace -- -D warningscargo test --workspaceopenproofwith MLX model on a proof