Claude Code Update Defaults to Opus 5 and Enhances Sandbox Workflows

The Claude Code CLI 2.1.219 update introduces 27 changes, defaulting to Claude Opus 5 with 1M context. It also significantly enhances agent workflows and sandbox capabilities by adding strict command allowlists, hooks, nested sub-agent forwarding, and new shell tools.

2026-07-25 ~ 2026-07-25 · 3 related posts

• Claude Code 2.1.219 makes Opus 5 the default and adds shell-output tools — ClaudeCodeLog · 2026-07-25
• Claude Code 2.1.219 adds allowlists, hooks, and nested subagent forwarding — ClaudeCodeLog · 2026-07-25
• Claude Code 2.1.219 adds Opus 5, stricter sandbox allowlists, and a new agent tool — ClaudeCodeLog · 2026-07-25