When Third-Party Software Becomes the Wrong Answer

Two things happened today that point at the same tension: Julie Zhuo wrote about wanting to ditch third-party software entirely because vibe coding makes custom tools viable, and Pieter Levels published the receipts — $25K/month in SaaS replaced by tools he built himself. Meanwhile, LangChain shipped a meaningful auth primitive for multi-agent systems, and GPT-6 Astra landing on Amazon Bedrock closes a gap that was annoying enterprise teams building on AWS.