Claude Code v2.1.90: Interactive /powerup Lessons, Auto Mode Boundary Enforcement, and .husky Directory Protection

Releasebot·medium signal

Released April 2 with 19 CLI changes. The headline feature is /powerup — the first official in-terminal learning system with animated demonstrations of Claude Code features. Auto mode now respects explicit user boundaries ('don't push', 'wait for X before Y'), fixing a longstanding complaint where agents would take actions users specifically prohibited. Also adds .husky to protected directories, fixes an infinite loop causing rate-limit dialogs to repeatedly auto-open, fixes --resume prompt-cache misses for users with deferred tools, and fixes Edit/Write failing when format-on-save hooks rewrite files between edits.