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Your cache bill is a layout decision, and the layout rots silently

This story is from 2026-09-02. It is preserved in the archive; the latest stories are on the live feed.

Gal Zahavi went looking for where an agent's API bill was actually going, and found 84% of it sitting on cache reads and writes , split almost evenly. Not the input and output tokens everyone watches. The cache. Compaction, the periodic squashing of old conversation turns to reclaim room, helped on…

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  1. 2026-09-02 14:13 · DEV Community — AI
    Your cache bill is a layout decision, and the layout rots silently

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