Anthropic accelerated claude.ai and the Claude desktop app by 3x in two weeks using Claude itself to identify performance bottlenecks and ship over 3,000 changes. The team focused on four high-impact user journeys, reducing page load times from 3.1 to 0.55 seconds and new session starts from 0.8 to 0.3 seconds, saving tens of thousands of user-hours daily. Claude Tag (beta) autonomously monitored deploys, built benchmarks, and proposed improvements while humans steered through goal-setting and change approval.