FA-98573 / KV cache position mapping / Member archive
Append rejects a discontinuous logical position · case 03
A skipped position is silently written as if it followed the cache tail.
Case contract
Given cached logical positions and a candidate position, return whether the append is contiguous. Empty cache accepts any nonnegative position.
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 |
|---|---|---|---|
| gap | true | false | Failed |
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