Claude Code Update Introduces Sandbox Controls and Expands System Prompts

Claude Code version 2.1.216 introduces a new filesystem sandbox toggle and fixes long-session stuttering issues. The update also includes 40 CLI changes and a 14% increase in system prompt tokens, reflecting a heavier reliance on prompt-based guidance.

2026-07-21 ~ 2026-07-21 · 4 related posts

• Claude Code 2.1.216 adds sandbox controls and fixes long-session stalls — ClaudeCodeLog · 2026-07-21
• Claude Code CLI 2.1.216 adds filesystem toggle and fixes long-session stalls — ClaudeCodeLog · 2026-07-21
• Claude Code 2.1.216 adds filesystem sandbox toggle and fixes long-session stalls — ClaudeCodeLog · 2026-07-21
• Claude Code Update Breakdown: System Prompt Tokens Surge by 14% — ClaudeCodeLog · 2026-07-21