Engineering notes
How we build Prufa: architecture decisions, trade-offs, and findings from real audits.
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We audited 49 Show HN launches. 38 had a critical bug on day one.
Free QA audits on 49 fresh Show HN launches: 78% had a critical finding. The full breakdown of what actually breaks at launch — analytics, links, cookies.
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How Prufa verifies a signup flow (and why the LLM never grades the result)
One signup run, end to end: an LLM-backed agent drives the browser, plain code grades the outcome against a public flow-spec. Same input, same verdict.