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Alert evaluation state transition: Threshold equality starts an alert · case 04

Threshold equality starts an alert.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

Disabled rules become disabled; absent observations become no-data; explicit evaluation error becomes error; values above threshold become firing after required consecutive count, otherwise pending; healthy observations reset count to zero.

Why this case matters

An offline model of alert evaluation state transition, 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 4	`["firing", 3]`	`["ok", 0]`	Failed

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