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Cache Keys Are Contracts: Reviewing Agent PRs That Memoize

This story is from 2026-09-11. It is preserved in the archive; the latest stories are on the live feed.

Agent pull requests that add a cache usually ship a correctness bug, not a speedup. Green tests do not contradict that. They almost never write, then read, then write again. Review the cache key, the invalidation path, and object identity before you merge the decorator. Speed is a secondary claim.…

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  1. 2026-09-11 16:43 · DEV Community — AI
    Cache Keys Are Contracts: Reviewing Agent PRs That Memoize

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