docs: catch README and ROADMAP up to shipped semantic caching - #1021
docs: catch README and ROADMAP up to shipped semantic caching#1021moonming wants to merge 2 commits into
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v0.9.0 shipped semantic response caching (#918, #921), but the README still listed it only under Roadmap and described the cache as exact-match only. Move it into the Caching feature entry (wording aligned with the v0.9.0 release notes), fold it into the shipped-since trailer, and drop the ROADMAP Now row. Also narrow the 'Conditional and wildcard routing' Next row to the undelivered remainder: wildcard model rows (provider/*) and tag-conditional targets via x-aisix-routing-tags are already on main.
📝 WalkthroughWalkthroughThe README documents semantic response caching and lists it as shipped. The roadmap removes semantic caching from planned work and describes conditional routing by request metadata and arbitrary headers. ChangesDocumentation alignment
Estimated code review effort: 1 (Trivial) | ~3 minutes Merge Risk: 🔵 Low · up to The documentation update is mergeable, but the semantic-caching description omits model, sampling, and request-type constraints that affect cache hits, creating a bounded risk of users forming incorrect expectations until the wording is completed. Suggested reviewers: 🚥 Pre-merge checks | ✅ 6✅ Passed checks (6 passed)
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Pull request overview
Updates top-level project docs to reflect that semantic (embedding-similarity) response caching has shipped (v0.9.0), and removes/adjusts roadmap entries that still described it as upcoming.
Changes:
- README: update the Features → Caching description to include semantic caching, and move the semantic-caching bullet from “Roadmap” into the “Shipped since this list was last written” trailer.
- ROADMAP: remove the “Semantic caching” row from Now, and narrow “Conditional and wildcard routing” to the remaining undelivered scope (“Conditional routing”).
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.
| File | Description |
|---|---|
| ROADMAP.md | Removes semantic caching from “Now” and refines the conditional-routing roadmap entry to the remaining work. |
| README.md | Updates the caching feature description to include semantic caching and adjusts the roadmap bullets to reflect what has shipped. |
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| A cache policy carrying a `semantic` block serves a cached answer to a differently-worded | ||
| question at or above its cosine similarity threshold — in-process, or shared across | ||
| gateway replicas on Redis vector search. Separately, **automatic prompt caching** can be |
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Actionable comments posted: 1
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Inline comments:
In `@README.md`:
- Around line 177-183: Update the README Caching description to document
semantic cache-hit fingerprint constraints: require model alias, sampling
parameters, and all other response-affecting fields to match; state that image,
audio, and tool-result requests use exact matching only.
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Audit follow-up: the declarative-configuration bullet still said ten collections (filesource KINDS is 13 on main — claim_mappings shipped in v0.9.0, plus passthrough_routes and mcp_auth_settings); 'scope matchers' collided with the v0.9.0 scope field, renamed to match rules; and the semantic sentence now carries the textual-only and per-key isolation caveats from the release notes.
What
An external audit cross-checking the README against the v0.9.0 release notes found the README behind the release: semantic caching shipped in v0.9.0 (#918, #921) but the README still listed it as a Roadmap item and described the response cache as exact-match only.
semanticblock serves a cached answer to a differently-worded question at or above its cosine similarity threshold, in-process or shared across gateway replicas on Redis vector search.provider/*,crates/aisix-proxy/src/model_resolve.rs) and tag-conditional targets fed by thex-aisix-routing-tagsheader are on main. The row is narrowed to the undelivered remainder (conditional routing on request metadata and arbitrary headers). Happy to reword if maintainers see the remainder differently.Other Roadmap entries were checked against main and stand: no Langsmith/Helicone/Slack sinks, no prompt-template resource, no Llama-Guard provider in the tree.
Note on the performance-figure claim
The same audit flagged a "~28,300 req/s baseline predating v0.9's thread-per-core numbers" in the README. The README carries no throughput figure — none in the current text and none anywhere in its git history — so there is nothing to update; the figure the audit saw must live outside this repo. No performance numbers are touched by this PR.
Summary by CodeRabbit
Independent audit
A cold audit agent verified every claim above against main and the v0.9.0 release notes (wildcard/tag routing code, exporter kinds, schemas, and all 26 historical README revisions for the perf figure). No HIGH findings. Its one MEDIUM and two LOW findings are fixed in the follow-up commit: the declarative-configuration bullet said "ten resource collections" while
filesourceon main registers thirteen (claim_mappingsshipped in v0.9.0, pluspassthrough_routesandmcp_auth_settings); "scope matchers" collided with the v0.9.0 cachescopefield (now "match rules"); and the semantic-caching sentence now carries the release notes' two caveats (textual-only matching, per-key isolation unlessscope: env).