Opus 4.6’s Simple Reasoning Errors in the Wild

I consider myself a sophisticated LLM user. I&rsquo;m on the max plans of leading LLMs. I have suites of agents that use different skills and build on existing memory. I build verification agents to check its work. I understand the implications of context compaction and make efforts to mitigate the risk. But over the past week I’ve noticed what appears to be one (or possibly two) recurring and…