An update on recent Claude Code quality reports

What this post added

This post details three specific issues that led to perceived degradation in Claude Code quality: 1. A change in default reasoning effort from 'high' to 'medium' to reduce latency, which was reverted due to user feedback preferring higher intelligence. 2. A bug in session idle handling that incorrectly cleared Claude's thinking history on every turn, causing forgetfulness and repetition, which was fixed. 3. An unintended consequence of a system prompt instruction to reduce verbosity that negatively impacted coding quality, which was reverted. The post also outlines improvements to internal tooling, code review capabilities, and system prompt change controls to prevent future regressions.