FA-11919 / Scientific pipeline provenance / Member archive

A specimen custody ledger accepts a transfer from a noncustodian · case 04

A specimen is reported at its destination despite a broken handoff chain.

Member previewVariant 4 · 3 implementations · 7 checks per implementation

Case contract

Given initial specimen holder and chronological [sender,recipient] handoffs, return final holder if every sender equals the preceding holder; otherwise None. Empty history preserves initial holder. Names are nonempty strings; self handoffs are permitted.

Why this case matters

A deterministic offline model of scientific specimen processing and provenance; explicit fixtures test the stated bookkeeping or processing acceptance rule.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
later sender mismatch	`"archive"`	`null`	Failed

MEMBER ARCHIVE

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

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