FA-98413 / Token sampling filters / Member archive
Token sampling: No-repeat n-gram filter bans every token seen in an n-gram · case 03
No-repeat n-gram filter bans every token seen in an n-gram.
Case contract
Remove a candidate if appending it would repeat an n-token sequence already present in history; n<=0 disables the rule.
Why this case matters
A finite, deterministic token-selection contract isolates one decoding operation from model inference and runtime behavior.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| different context allowed | [] | ["a"] | Failed |
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