FA-11239 / Media timeline seeking / Member archive

Live edge minus holdback · case 04

Live playback starts at the unstable edge instead of behind the holdback.

Member previewVariant 4 · 3 implementations · 4 checks per implementation

Case contract

For this contiguous live-window policy, return latest end minus nonnegative holdback clamped to earliest start; empty ranges return None. No gap correction is included.

Why this case matters

A deterministic local media controller stage; metadata and downloaded data are supplied explicitly. No external player, service or codec is required.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
fixture 1	`20`	`17`	Failed

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