diff --git a/CLAUDE.md b/CLAUDE.md
index 6bb73e8b2..54ddfa2a3 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -131,6 +131,7 @@ Each experiment (`spd/experiments/{tms,resid_mlp,lm}/`) contains:
 - WandB integration for experiment tracking and model storage
 - Supports both local paths and `wandb:project/runs/run_id` format for model loading
 - Centralized experiment registry (`spd/registry.py`) manages all experiment configurations
+- **When adding a new metric config class**, also add a short name entry in `METRIC_CONFIG_SHORT_NAMES` in `spd/utils/wandb_utils.py` — this is used for WandB run names and flattened config keys
 
 **Harvest, Autointerp & Dataset Attributions Modules:**