Domain Arrivals
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Featured in Domain Arrivals · 2026-08-14

The diagram tool that lets an assistant inspect its own work

diagrambuilder.app ↗ · Developer Corner · score 84.0
○Open: public page gives enough substance to understand the site $Paid: pricing, booking, ecommerce, subscription, or paid access is visible ADAds: visible ad load or ad-supported content ✦Pretty: notable design, copy, craft, or presentation ◆Pro: polished, finished-feeling, serious, or operationally mature ◇Niche: specific audience, workflow, or unusually focused use case ◉Human: personal, local, community, civic, handmade, or real-person signal !Suspicious: scammy, spammy, trust theater, finance fog, or credibility concern

Diagram-builder is a local desktop app and MCP server for creating fixed-page diagrams with an assistant, then exporting them as SVG, PNG, or PDF.

Why it surfaced

Its hook is a closed visual feedback loop: the assistant renders a diagram, sees the PNG, and can correct an overflowing label or misplaced arrow. The tool also promises stable object identity, atomic diagram operations, and a one-time purchase rather than a subscription.

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The Largest Cat Has No Number

August 14’s newborn domains include an unnumbered giant among thirteen catalogued glossy cats, a shareable Visual Snow Syndrome simulator, two independent Colombian relief directories, and a snail farm with races, courtship, and its own Gazette.

This is one of 1,000 discoveries in the 2026-08-14 Domain Arrivals issue.

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An interactive population-genetics simulator that evolves 10,000 badge-like individuals across nine genetic loci.