FA-73873 / Feature flag rollout bucketing / Member archive

Weighted variant allocation: Zero-weight arms participate in allocation · case 03

A variant switched off with weight zero still receives remainder traffic, and negative weights shrink totals.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

variants is an ordered list of [name, weight percent with at most two decimals]; bucket is an integer in [0, 10000). Walk variants in declared order, skipping non-positive weights, adding round(weight * 100) to a running total, and return the first variant whose total exceeds the bucket. Buckets beyond the total go to the last positively weighted variant; with none, None.

Why this case matters

Variant splits decide which arm of a flag a user receives and must honour declared weights exactly.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
trailing zero weight arm does not absorb remainder	`"off"`	`"treatment"`	Failed

MEMBER ARCHIVE

The complete case is available to members.

This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

Member access is invitation-based. Sign in with your invited account to inspect the sources.