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Navigation active-link matching: Sibling prefixes mark unrelated navigation items active · case 03

Sibling prefixes mark unrelated navigation items active.

Member previewVariant 3 · 3 implementations · 13 checks per implementation

Case contract

Ignore URL query and fragment; normalize trailing slashes with root preserved; honor case policy; section matches require a slash boundary and root matches exactly.

Why this case matters

A deterministic model of navigation active-link matching; this isolates one interface invariant without requiring a browser.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
prefix sibling	`true`	`false`	Failed

MEMBER ARCHIVE

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

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