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I spent a week building an optimization, A/B tested it, and deleted it

This story is from 2026-09-28. It is preserved in the archive; the latest stories are on the live feed.

I had a 25,000-token system-prompt overhead on every agent call. Obvious problem, obvious solution: build a session-reuse layer so the overhead is paid once and amortised across many calls. So I built it. Session pooling, lifecycle management, identity tracking, the works. It was the most intricate…

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  1. 2026-09-28 11:57 · DEV Community — AI
    I spent a week building an optimization, A/B tested it, and deleted it

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