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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.
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 #111 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.
On the analytics side, cache-assembler competes within Open Source, Developer Tools, Artificial Intelligence and GitHub — topics that collectively have 1.1M followers on Product Hunt. The dashboard above tracks how cache-assembler performed against the three products that launched closest to it on the same day.
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.
For a complete overview of cache-assembler including community comment highlights and product details, visit the product overview.
Michael Nash