One Line
A prompt box that compiles your description into a running WASM module in the browser. Built for One Prompt — ship a useful product where the entire interface is a single prompt field. Prompt-to-WASM compilation and in-browser execution. The interface is deliberately narrow: one path, done properly, rather than a broad surface that half-works at the deadline.
Gallery
Screens
One Line — main view
One Line — result state
On the clock
What shipped, what didn't
Completed in time
Prompt-to-WASM compilation and in-browser execution.
Unfinished / faked
Compile failures show a raw stack trace.
Obstacles
Rate limits hit at minute 20 and forced a caching layer I hadn't planned for.
Lessons learned
Hardcode the thing you can hardcode. Nobody is scoring your config system.
Process
Prompting approach
Started from a single system prompt describing the user and their constraint, then iterated with the assistant on the One Line data model before writing any interface code. Full prompt log is in the repository under /prompts.
Fairness
Disclosures
Declared by the builder at submission time, visible to judges before scoring.
Judging
Public feedback
Judges' private notes stay private — this is what they chose to say publicly.
Marcus Bell
Founder, Bellwether Studio
Nice work under the clock. The unfinished list is longer than the finished one, but what shipped works and you were straight about it.
Hana Kobayashi
Principal Research Engineer, Independent
Solid build with a clear user in mind. The interface is doing less than it could — a second pass on hierarchy would lift this considerably.
Ravi Anand
Head of Design, Tessellate
Solid build with a clear user in mind. The interface is doing less than it could — a second pass on hierarchy would lift this considerably.
Discussion
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