Cache-hunter is presented in a Reddit post as a simple tool for harness builders to detect when prompt changes invalidate LLM prefill caches, a problem its unnamed author encountered while building a local-first harness. The surrounding results establish that cache invalidation can affect inference cost and latency, and that related harness-level prompt-caching tools exist. However, the supplied snippets do not identify Cache-hunter’s creator, explain its implementation, or provide evidence that it has gained—or will gain—adoption.
Cache-hunter operationalizes Scott’s prefix-caching economics and evaluation-driven development positions by treating prompt-induced cache invalidation as a reproducible harness regression. It could directly inform testing of the active `ask` harness, whose append-only tool loop and context compaction can alter prompt prefixes, although the supplied evidence does not establish the tool’s implementation quality or adoption.
ip:concept.prefix-caching-economicsip:concept.evaluation-driven-developmentdev:project.ask
queries asked of Scott's wikis
- prompt-prefix stability in agent harnesses
- prefill cache observability and regression testing
- cache-aware context compaction strategies
- local inference economics and KV-cache reuse
- prompt mutation and cache invalidation
- LLM harness cost and latency instrumentation
2026-08-04T13:23:46Z
The latest independent OpenCode cache-monitoring plugin further establishes the broader diagnostic-tooling pattern while again showing no uptake of Cache-hunter itself. With multiple fragmented implementations emerging and no integration signal after the launch window, the tool-specific adoption episode has closed.
2026-08-04T13:21:45Z
evidence attached: hn.story.49168155 — Independent corroboration that coding-agent builders need tooling to observe and diagnose prompt-cache behavior.
2026-07-30T16:27:36Z
The latest trigger adds no identifiable adoption or integration of Cache-hunter; independent work continues to validate cache diagnostics while favoring fragmented implementations. The tool-specific adoption hypothesis remains uncorroborated, so further engagement-only checks are not informative.
2026-07-30T14:28:48Z
Independent real-time cache-hit testing further validates reproducible cache diagnostics as a tooling pattern, but still shows no adoption or integration of Cache-hunter itself. Evidence increasingly points toward fragmented implementations rather than convergence on this specific tool.
2026-07-30T14:21:34Z
evidence attached: hn.story.49109979 — Independent testing supports the open case that real-time cache-hit verification is useful for diagnosing prompt-cache invalidation.
2026-07-27T15:27:24Z
The latest trigger adds no evidence of Cache-hunter adoption, integration, or consequential uptake beyond the already-assessed independent benchmark. The broader tooling pattern is corroborating, but it may favor fragmented implementations rather than this specific tool, so further engagement-only checks are not informative.
2026-07-27T11:28:13Z
An independent prompt-cache benchmark now corroborates the tooling pattern, showing that reproducible cache testing is emerging beyond Cache-hunter’s launch. It still provides no adoption, integration, or consequential uptake of Cache-hunter itself—and may indicate fragmented independent implementations instead.
2026-07-27T11:21:11Z
evidence attached: reddit.post.1v7x8g4 — This is an independent prompt-cache benchmarking tool for Anthropic-compatible endpoints, directly testing the cache-debugging hypothesis.
2026-07-26T15:23:36Z
No new evidence identifies Cache-hunter adoption, integration, or independent implementation; the attached material continues to corroborate only the broader cache-invalidation problem. Repeated observation is no longer informative, so defer another look until concrete uptake appears.
2026-07-26T13:22:02Z
The latest trigger adds no identifiable Cache-hunter adoption, integration, or independent implementation; all corroboration still concerns the underlying cache-invalidation problem rather than the tool-specific hypothesis. Repeated re-observation is no longer informative, so the case should cool until concrete uptake appears.
2026-07-26T10:21:45Z
The latest look adds no identifiable adoption, integration, or independent implementation of Cache-hunter; it continues to corroborate only the underlying cache-observability need. The tool-specific adoption hypothesis remains plausible but uncorroborated, and repeated engagement does not change its meaning.
2026-07-26T09:21:47Z
The new telemetry independently confirms that cache invalidation is a costly harness-level problem, but it does not show Cache-hunter adoption or implementation beyond its launch audience. The case remains a tool-specific adoption bet supported only by growing evidence for the underlying need.
2026-07-26T09:20:58Z
evidence attached: reddit.post.1v6xx6q — Independent session telemetry reports repeated file reads, cache invalidation after idle gaps, and substantial tool-result costs, materially supporting prompt-cache debugging as a real harness problem.
2026-07-26T08:22:11Z
No new adoption or implementation evidence is present beyond the already-assessed measurements of the underlying cache-invalidation problem. Cache-hunter remains a plausible but uncorroborated tool-adoption hypothesis, with current attention amounting to repetitive amplification.
2026-07-26T07:21:40Z
Independent measurements now strengthen the need for prompt-cache regression tooling, but still provide no evidence that Cache-hunter itself is being adopted by harness builders. The case remains a plausible tool-adoption hypothesis rather than a corroborated adoption trend.
2026-07-26T07:20:55Z
evidence attached: reddit.post.1v6wgdj — Detailed independent measurement identifies cache invalidation and subagent context rewrites as major coding-agent cost drivers, materially strengthening the prompt-cache debugging case.
2026-07-22T18:37:43Z
No new independent implementation or adoption evidence has emerged; the case still establishes a real cache-observability problem rather than uptake of Cache-hunter itself. Repeated favorable discussion does not change the adoption hypothesis.
2026-07-22T17:26:38Z
The added evidence strengthens the underlying need for prompt-cache observability, but does not show Cache-hunter adoption or implementation beyond its launch discussion. Favorable comments and marginal engagement growth are repetitive amplification rather than an independent adoption signal.
2026-07-22T17:21:44Z
evidence attached: hn.story.49009301 — The measured 8x cache-keepalive cost materially supports the case that prompt-cache behavior needs reproducible debugging and economic analysis.
2026-07-20T04:26:32Z
grounded: converges/medium — Cache-hunter operationalizes Scott’s prefix-caching economics and evaluation-driven development positions by treating prompt-induced cache invalidation as a rep
2026-07-20T02:21:35Z
The initial discussion remains favorable but has plateaued and provides no independent evidence of adoption by harness builders. The case still reflects interest in the problem and tool, not demonstrated uptake.
2026-07-19T11:24:20Z
case created — The released tool addresses a concrete local-inference cost problem and has meaningful early builder engagement.