Vendo (YC S26) Runs LLM-Generated React Inside a QuickJS VM With No DOM, Network or Clock, So End Users Can Build Features in Your SaaS
The Launch HN, at 45 points and 20 comments, describes a drop-in that lets a product's own users describe a dashboard or workflow and get a durable, pinnable feature built against the host app's data and APIs. 'npx vendo init' extracts the API surface, theme and routes; generated React is compiled, type-checked and validated against real API responses, then run with Preact inside a QuickJS VM stripped of DOM, network and clock access, returning UI trees rendered with the host's own components and emitting interactions as guarded tool calls. Pricing is $49/month including usage credits. The founders' line, 'a rule in code always beats a rule in a prompt', is the interesting design claim; commenters focused on who supports a broken AI-generated feature.
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