[claude] Autoresearch H1: Apple Silicon support + M3 Max baseline doc (#905) (#1252)

src/config.py

@@ -387,6 +387,11 @@ class Settings(BaseSettings):
     autoresearch_time_budget: int = 300  # seconds per experiment run
     autoresearch_max_iterations: int = 100
     autoresearch_metric: str = "val_bpb"  # metric to optimise (lower = better)
+    # M3 Max / Apple Silicon tuning (Issue #905).
+    # dataset: "tinystories" (default, lower-entropy, recommended for Mac) or "openwebtext".
+    autoresearch_dataset: str = "tinystories"
+    # backend: "auto" detects MLX on Apple Silicon; "cpu" forces CPU fallback.
+    autoresearch_backend: str = "auto"
 
     # ── Weekly Narrative Summary ───────────────────────────────────────
     # Generates a human-readable weekly summary of development activity.