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cache-assembler
Cuts Claude Code and API costs 8.2x by fixing prompt-caching
cache-assembler fixes prompt-cache invalidation for Claude Code and the Anthropic API. The cache only hits on byte-identical requests, but real traffic breaks that: inconsistent tool-schema ordering, session data leaking into prompts, concurrent requests racing to write the same entry. This proxy fixes all three, with a dedicated Claude Code preset. Measured against the real API (not synthetic): 8.2x cost reduction, $1.33 to $0.16 per 100-turn session. MIT licensed, zero dependencies.
Hey PH! Built this after realizing my own agentic Claude setup was burning way more tokens than it needed to - turns out prompt caching only works if your request bytes match exactly, and most real usage never hits that bar without help.
cache-assembler sits in front of the API and fixes what normally breaks the match. Measured it properly against the real Anthropic API (not a synthetic benchmark) - 8.2x cost reduction, $1.33 to $0.16 per session.
MIT licensed, zero dependencies. Happy to answer anything about the mechanism or the validation methodology - would love feedback from anyone else running heavy agentic workloads.
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About cache-assembler on Product Hunt
“Cuts Claude Code and API costs 8.2x by fixing prompt-caching”
cache-assembler was submitted on Product Hunt and earned 2 upvotes and 1 comments, placing #99 on the daily leaderboard. cache-assembler fixes prompt-cache invalidation for Claude Code and the Anthropic API. The cache only hits on byte-identical requests, but real traffic breaks that: inconsistent tool-schema ordering, session data leaking into prompts, concurrent requests racing to write the same entry. This proxy fixes all three, with a dedicated Claude Code preset. Measured against the real API (not synthetic): 8.2x cost reduction, $1.33 to $0.16 per 100-turn session. MIT licensed, zero dependencies.
cache-assembler was featured in Open Source (68.7k followers), Developer Tools (517.6k followers), Artificial Intelligence (476.1k followers) and GitHub (41.4k followers) on Product Hunt. Together, these topics include over 235.4k products, making this a competitive space to launch in.
Who hunted cache-assembler?
cache-assembler was hunted by Michael Nash. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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Michael Nash