[acoliver]

Recreated after the llxprt account suspension removed original PR #295. Head 66225a9fccf059a6d24626fd6d4b85153dfe8720 on restored branch branch4-issue79-prompt-cache.

Contents: stateless prompt-cache routing/observation for the configured provider, vendor patch provenance, serialized-prefix coverage; matched live cache-on/off measurement recorded (off: 8250 input tokens/0 cached; enabled: 8250 input/2816 cached, 34.13% hit ratio) with the enabled arm slower in both final pairs and no latency-benefit claim; zero-hit and transient-503 evidence retained.

Verification recorded: 68 model-API, 85 profile, HTTP cache-integration, provenance/license tests pass. Remaining before ready: final shared #252/#286 integration, full/release/archive/extracted closure on final source, and independent native review. Do not merge.

[acoliver]

Current-main cache integration is local at c9dc4706d2fff963cabfc984542eadeb9e3d7243, with exact shared/profile scope mappings and preserved main SSE fixtures. Remaining independent review completed and requested two bounded changes: aggregate externally supplied cache-token counters can overflow into a process panic, and the owning documentation renderer restores obsolete routing guidance. Native Sol is repairing those in a separate isolated copy; original candidate/review/gate attempts remain intact.

Historical measured reads remain2816/8250 for a synthetic repeat-prefix workload; enabled was slower in both pairs. The original scripts explicitly prohibited tools, and the written issue does not require inventing a new tool-using live measurement. No provider/model experiment was repeated. Final source, findings-only follow-up, extracted/package acceptance and fresh exact-head CI remain pending; not merge-ready.

[acoliver]

Replacement draft #323 is published at e56e9fed853b7dbaa75149a474fd320b336c0f96. It maps the original cache-only port and reconciled current-main/shared/profile residuals, preserves original #303 refs/head/history and retains all historical measurement qualifications. The original branch is not rewritten or deleted.

The full initial review requested two changes; both now have committed native fixes and unchanged original overflow reproduction proof. Single findings-only completion was interrupted by a typed provider error after28events, without request replay, and remains unfinished. Full/package/native final acceptance is also running. #323 is a draft requesting fresh exact-head CI, not merge approval.

Closing this superseded delivery in favor of #323 avoids two open PRs for the same cache scope. No assertion/workflow weakening, lost historical negative results, invented tool-using measurement requirement or merge.