Quick start
npm ci
npm run serve # builds, then serves the UI on http://localhost:8790
# reachable over LAN / Tailscale so you can score from your phone:
npm run serve -- --host 0.0.0.0 --port 8790
Prompt Tournament Runner
Compare 3–5 prompt variants on the same task, score the outputs 1–5, pick a winner, and keep a local record so you never re-litigate the same prompt twice. No account, no API keys, no telemetry — it runs entirely on your machine.
The loop
- Capture the task (and optional context)
- Enter 3–5 prompt variants
- Run them, paste the outputs back in
- Score each 1–5 and pick a winner
- The run is saved locally for later review
Use it for
- choosing a system prompt with evidence, not vibes
- comparing outputs across models or temperatures
- prompt regression checks before you ship
- scoring a session from your phone over Tailscale
Privacy
100% local. The app never calls an external API and has no
analytics. Runs are written to
.prompt-tournament-runs.json in your working
directory — yours to keep, diff, or delete.