Summary (TL;DR)
AMD AI director Stella Laurenzo says Claude Code lost performance after a February 2026 update, based on analysis of over 6,800 coding sessions. Stop-hook violations increased from zero to roughly 10 per day. Laurenzo links the decline to thinking redaction, shift from research-first to edit-first behavior, and reduced code quality. Anthropic responded that redaction only hides reasoning, and introduced adaptive thinking. They recommend setting effort=high for complex tasks, and plan to test higher effort for Teams and Enterprise users.
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