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Client attachment resource ownership: Removed preview release · case 04

Removed preview release.

Member previewVariant 4 · 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 removed-preview-release 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
removed-preview-release scenario 1	`null`	`"blob:a"`	Failed

MEMBER ARCHIVE

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

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