Claude Code v2.1.210 Released: Major Bug Fixes and UX Improvements

Claude Code v2.1.210 is a major bug fix and improvement release. It adds a real-time runtime counter to prevent long-running tool calls from appearing stuck, and introduces startup warnings for Write, NotebookEdit, and Glob permission rules, recommending Edit or Read instead. On the security front, it fixes a worktree sub-agent isolation vulnerability that allowed git modifications to the main repo, and strengthens agent defenses against indirect prompt injection. Auto mode improvements include defaulting to Sonnet 5 as the permission classifier for external sessions, validating and pinning it on the first session request. For teams using Claude Code for long-running unattended automation, this release fixes a bug where hook callback timeouts were incorrectly reported as user rejections, preventing mid-session stops. Issues like background worker crash loops and task tracker loss are also resolved. The Fable advisor is temporarily shown as unavailable pending a server-side fix.