Descriptions:
Ray Amjad runs through 17 recent Claude Code updates released over a two-week window, with the standout being native git worktree support via `claude worktree` (or `claude -w`). This lets developers spin up isolated branches for parallel feature work, preventing subagents from stepping on each other’s file changes. Adding `isolation: worktree` to any agent’s frontmatter makes the behavior automatic, and the `ctrl+W` shortcut in `/resume` now shows all active worktrees alongside current-branch sessions.
The Claude Code desktop app gains a built-in browser preview panel that lets Claude run a local development server, navigate pages, click UI elements, select specific DOM nodes for targeted edits, and capture screenshots — practical for design iteration and automated UI testing. Amjad demonstrates switching to a mobile viewport, changing a button color by selecting its element, and persisting browser session data (cookies, localStorage) across server restarts to avoid repeated logins. A `launch.json` is auto-generated and can be committed to GitHub for faster environment spin-ups in the future.
Other updates include worktree support in the desktop application, tmux integration that works alongside worktrees for background long-running agents, and an early look at a security research feature Anthropic is testing internally — using a less-restricted model variant to identify vulnerabilities in codebases. For teams doing parallel feature development or anyone who wants Claude Code to validate UI changes automatically, this release brings meaningful workflow improvements across both CLI and desktop surfaces.
📺 Source: Ray Amjad · Published February 21, 2026
🏷️ Format: Tutorial Demo
