Claude Code enters research preview with Opus support

Claude Code signals the end of the "AI assistant" era and the start of the "AI agent" era, where developers delegate high-level tasks instead of just accepting autocompletes.

• –Native terminal access allows the agent to run tests, grep files, and verify its own fixes in real-time.
• –Multi-file refactoring capability handles complex, cross-cutting changes that often trip up traditional IDE extensions.
• –Deep git integration automates the "boring" parts of dev life, from branch creation to descriptive commit messages.
• –Model Context Protocol (MCP) support pulls in data from Jira, Slack, and internal docs for richer context.
• –The CLI-first approach targets power users who want a "delegator" tool that fits into existing Unix pipelines.