FA-45652 / Data systems / Member archive

Session grouping overwrites the session start on every event · case 02

Session grouping overwrites the session start on every event.

Member previewVariant 2 · 3 implementations · 7 checks per implementation

Case contract

Group [key,time,id] events into sessions independently by key. Sort each key by (time,id); consecutive gaps <=gap belong to one transitive session. Emit [key,first-time,last-time,ordered-ids] ordered by key and session time. An intervening bridge may join otherwise distant endpoints.

Why this case matters

A bounded deterministic data engine model makes representation and changelog faults reproducible.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
bridge chain	`[["a", 6, 6, [10, 11, 12]]]`	`[["a", 2, 6, [10, 11, 12]]]`	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.