Endgame Engineering
Notes from the Endgame engineering team — what we build and how.
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We Measured What Prompt Caching Actually Saves Us. It Was 68%.
Everyone says prompt caching saves money. We pulled our own usage logs and got a real number — 68% off our biggest model, net of what the cache itself costs.
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How We Swapped Next.js for Vite Without Rewriting the App
We moved a 236K-line production app off Next.js onto a Vite SPA in six weeks, zero downtime — by re-routing instead of rewriting, and leaning hard on AI agents.