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Build prerequisite closure: Requested root targets disappear from results · case 03

Requested root targets disappear from results.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

Return sorted unique reachable target names including roots. Traverse normal prerequisites, exclude order-only prerequisites, retain unknown leaves, and stop cycles.

Why this case matters

An offline model of build prerequisite closure, suitable for testing build and release tooling without external services.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
fixture 2	`[]`	`["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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