Theme dev proxy intermittently returns 403 / "Verify your connection" since May 7 2026 bot rate-limit change

[Gray-Shopify]

429 Too many requests

Hi Everyone, I’m on the team that owns the Theme CLI. Thank you for all your reports and insights and for bearing with us while we sort out this most recent flare up of CLI errors. We know it’s very frustrating and disruptive to your workflows and productivity. I’d like to give you all some insight into what has been going on and what we’re trying to do about it For this specific case The 429s a number of you have been hitting with Shopify theme dev over the past week are caused by a UA-pars…