Support parallelism (via Subagents)

[epoyraz]

Before submitting

• I searched existing issues and discussions.
• This is a feature request, not a bug.

Problem

I wanted to scrape the menus of the top 300 Restaurants in Zurich (according to TripAdvisor) and use Claude Code Sub-Agents for this task, because it's easily parallizable. Each Restaurant website is independent from the others.
Currently, this is not possible, with browser-harness: Subagent's (in Claude Code) would spawn a new tab and then fighting over tabs.

Proposal

I am not sure, but i think browser-harness does only use 1 port for the CDP connection.
See: obra/superpowers-chrome#24

Alternatives considered

The current alternative is to do it sequentially, which takes 10x more time.