Engineering notes from Amir Khakshour — bug post-mortems, LLM gateway scars, and the occasional working theory. Drafted from real production fires at blog.sourceshift.io.https://blog.sourceshift.io/https://blog.sourceshift.io/blog/2026-05-12-anthropic-baseurl-env-leak/https://blog.sourceshift.io/blog/2026-05-12-anthropic-baseurl-env-leak/A 404 from Vercel @ai-sdk/anthropic that wasn't from Anthropic at all — and the env-var leak that caused it.Tue, 12 May 2026 00:00:00 GMT