Sample output
Example design documents
The rate limiter is a complete, unedited document produced by the tool. The URL shortener is a shortened example. Start with the executive summary, alternatives considered, and failure modes — the rest is reference detail.
Design a URL shortener
A public link shortener handling 100M new links per month with a 100:1 read-to-write ratio and redirects under 50 ms at p99.
Short example · read →
Design a rate limiter
A distributed rate limiter in front of a public API: 50k requests/s across 20 gateway nodes, per-API-key limits, under 2 ms added latency.
Real tool output · read →
