Shopify’s 53% Speed Claim Still Unmerged, Flagged as Overfit
In early March 2026, Andrej Karpathy — co-founder of OpenAI and former Director of AI at Tesla — launched a three-file GitHub repository that encodes one of many cleanest engineering concepts to emerge this yr: give a coding agent a single editable file, a frozen evaluator, and a scalar metric, then run a keep-or-revert loop…