Capabilities
Design first. Build second.
The Design tab is a website builder that settles how the site should look and what pages it needs before a line of code is written. Then the fleet builds it.
The flow
Three steps, in the right order.
Theme first
The build starts with the look. Settle the theme before anything else, so every page that follows is designed against a real visual direction instead of a default.
Then a page plan
Next comes the plan: which pages the site needs and what each one is for, agreed before the build begins. You are reviewing a sitemap, not untangling generated code.
Then the fleet builds
With the look and the plan settled, the work goes to the fleet: six real Claude Code sessions building in parallel from a brief that was designed, not improvised.
Why design before build
Most generated websites start with code and hope the design emerges. The Design tab inverts that. Decisions that are cheap to change on paper, the theme, the set of pages, the purpose of each one, get made first, while they are still cheap. By the time the fleet starts writing code, the expensive questions are already answered, and six sessions can build in parallel without pulling the site in six directions.
It also means you stay in the role Loom is built around: you decide, the fleet executes. You approve a look and a plan in minutes, then review the result instead of supervising the process. The Design tab shipped recently, and the announcement post tells the story of why it works this way.
After the build
See it, review it, refine it.
Watch it run
Dev servers are auto-detected and opened in an inline web preview tab, so you see the site take shape without leaving Loom.
Review the code
Everything the fleet writes lands in git. The source control panel gives you diffs and the full graph to review before anything ships.
Refine by hand
The editor is right there when you want to adjust something yourself, with inline AI autocomplete and hunk-by-hunk AI diffs.
Hand it the work.
Walk away.
macOS, Linux, and Windows. Around 13 MB. Free and open source.