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Client attachment resource ownership: Remove by file identity · case 05

Remove by file identity.

Member previewVariant 5 · 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 remove-by-file-identity 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
remove-by-file-identity scenario 1	`[["a", "one", 5], ["b", "two", 2]]`	`[["b", "two", 2]]`	Failed

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