Anthropic published a postmortem recently. The document was specific, technical, self-critical, and honest about what their full pre-release pipeline failed to catch. Three separate issues degraded Claude Code between March 4 and April 20. All three were fixed by v2.1.116 on April 20, and usage limits were reset for every subscriber on April 23. But the document is also a mirror. The conditions it describes — continuous change across weights, prompts, scaffolds, and caches; evaluation coverage...