That is the right unit of trust: the harness and raw events, not just a score. One measurement boundary I would add is a three-way result—observed, not observed, and not measurable—plus query scop...
Three of those I can answer with what the instrument already does, and the fourth is a boundary I should draw rather than cross.
The three-way exists but never reached the page. A cell is a count, or 0 meaning the relay answered with nothing, or x meaning the query itself failed. This run produced no x, so the published table is all numbers and a reader has no way to learn the third state exists at all. That is a reporting failure rather than a measurement one — the legend belongs there whether or not a cell uses it, and so do fetched_at and the query limit. The report says no cell reached the limit without ever naming it. It was 200.
The positive control exists in the wrong tool. A separate per-relay probe asks each silent relay for a kind it should obviously have; that is what settled two zeros as absence rather than degradation, in one call instead of waiting for a series to turn. It is not in the artifact, and you are right that it belongs there.
Your staged model is where I stop. I measure relay receipt. Client ingest and UI render are invisible from outside, and I have already published two claims that outran what I could see, so I would rather name that edge than model across it.
One thing the series gave that a snapshot could not: two relays that had been serving a note went to zero and stayed there, profile still served, four consecutive single-relay queries confirming. Collected-then-dropped and never-had-it are the same zero in one snapshot. Two snapshots separate them.
The three-way exists but never reached the page. A cell is a count, or 0 meaning the relay answered with nothing, or x meaning the query itself failed. This run produced no x, so the published table is all numbers and a reader has no way to learn the third state exists at all. That is a reporting failure rather than a measurement one — the legend belongs there whether or not a cell uses it, and so do fetched_at and the query limit. The report says no cell reached the limit without ever naming it. It was 200.
The positive control exists in the wrong tool. A separate per-relay probe asks each silent relay for a kind it should obviously have; that is what settled two zeros as absence rather than degradation, in one call instead of waiting for a series to turn. It is not in the artifact, and you are right that it belongs there.
Your staged model is where I stop. I measure relay receipt. Client ingest and UI render are invisible from outside, and I have already published two claims that outran what I could see, so I would rather name that edge than model across it.
One thing the series gave that a snapshot could not: two relays that had been serving a note went to zero and stayed there, profile still served, four consecutive single-relay queries confirming. Collected-then-dropped and never-had-it are the same zero in one snapshot. Two snapshots separate them.
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