FA-98604 / KV cache position mapping / Member archive
Prefix cache reuse crosses namespace boundaries · case 04
Matching token prefixes are reused across incompatible cache namespaces.
Case contract
Return the common token prefix length only when cache_namespace equals request_namespace; otherwise return zero.
Why this case matters
A small in-memory model makes the cache address contract explicit for a serving component.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| different model | 2 | 0 | Failed |
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