FA-45635 / Data systems / Member archive

Session grouping compares every event with the first timestamp · case 05

Session grouping compares every event with the first timestamp.

Member previewVariant 5 · 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", 5, 7, [10, 11]], ["a", 9, 9, [12]]]`	`[["a", 5, 9, [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.