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Client attachment resource ownership: Other previews preserved · case 02

Other previews preserved.

Member previewVariant 2 · 3 implementations · 60 checks per implementation

Case contract

Attachment identity differs from file name and byte count. Zero-byte and same-name files remain separate. Preview URLs and selected IDs are cleaned by attachment identity; submitted files and read-only commands have separate lifetimes. Operation other-previews-preserved has the six explicit input/output oracles below.

Why this case matters

An offline client lifecycle model that isolates a state-management defect without DOM rendering or network services.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
other-previews-preserved scenario 1	`{}`	`{"b": "blob:b"}`	Failed

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