Overview
Prompt Diff is a browser extension that lets you compare two prompt revisions side-by-side with live output, latency, and cost deltas.
Challenge
Prompt iteration is usually tracked in a notes doc with screenshots. There is no way to see "what changed when I tweaked this sentence" at a glance.
Approach
- Capture runs directly from supported playgrounds.
- Diff the prompt text and the output in parallel.
- Surface latency, token, and cost deltas next to the text diff.