Claude Code's New Desktop App Runs Parallel Coding Sessions Side by Side
A day after Claude Opus 4.5's launch, developers are getting hands-on with two Claude Code upgrades that shipped alongside it. The first is a native desktop application, which lets a developer run multiple local and remote sessions in parallel inside one window — one agent fixing a bug, a second researching an open GitHub issue, a third updating documentation — rather than juggling separate terminal tabs for each.
Plan Mode asks first, executes second
The second upgrade is a reworked Plan Mode, now powered by Opus 4.5. Instead of diving straight into changes, Claude asks clarifying questions upfront, then writes a user-editable plan.md file laying out its intended approach before executing anything. The plan can be edited or corrected before a single line of code changes — aimed at cutting down on the mid-task course corrections that come from Claude guessing wrong about an ambiguous instruction.
Running several agents in parallel only pays off if each one is working from an accurate plan. Pairing the desktop app with a stronger Plan Mode is a deliberate combination: more concurrency, but with a checkpoint before execution so mistakes are caught on paper instead of in the codebase.