Prompt engineering, automated

Describe a thing.
Get a prompt that builds it.

1ShotGen turns a one-liner — or a wall of text — into a single, surgical prompt you can hand to Claude Code, Cursor, Codex, or Aider and have it built end-to-end in one shot. No back-and-forth. No half-finished scaffolds.

Start free → See how it works

5 free generations a month · no credit card

one-shot prompt

# Goal
Build a pixel-art pomodoro timer as a single-page web app…

## Tech stack
Vite + React + TypeScript, Tailwind, Web Audio API for the chime.

## Behavior & features
- A tomato sprite that grows across 8 frames as the 25:00 counts down
- Soft completion chime; gentle shake on the last 10s
- Local-storage streak counter

## Definition of done
- Timer is accurate to the second, pauseable, resettable
- Runs with one command, zero console errors

Three steps to a buildable prompt

Describe it

A sentence or a spec — whatever you've got. Pick a target (web app, CLI, iOS…) or let the model choose.

We engineer the prompt

1ShotGen expands it into a precise brief: stack, file layout, data model, edge cases, and a definition of done.

Paste & build

Hand it to your coding agent. Copy, download as .md, and watch it build the whole thing at once.

Simple pricing

Start free. Upgrade when one-shotting becomes a habit.

Free

$0/forever

5 generations / month
Every build target
Copy & download as Markdown
Saved prompt history