The Claude Code Changelog

Locking Down Subagent Tools and Environment Variables in 2.1.313

October 30, 2026·4 min
Episode Description from the Publisher

Explore the updates in Claude Code version 2.1.313, focusing on subagent tool restrictions through explicit allow and disallow lists to limit blast radius and save tokens. Learn how the new environment variable allowlist secures worker environments in headless and CI workflows, along with key bug fixes for nested Git worktrees and status bar metrics.

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