Reference · measurement evidence

Availability states

Five exact values explain modeled field availability. They do not guarantee that every snapshot contains a measurement.

Five wire values

State reference

StateEntered whenNextAgent handoff

available

The modeled baseline says the platform exposes the field.

A later evidence review may reclassify it.

Preserve a number or null exactly as returned.

delayed(2-3d)

The field is expected after a two-to-three-day delay.

Retry after the evidence window.

Keep a current null distinct from zero.

estimable

Suitable evidence could support a derived value.

No computation is promised.

Do not calculate without a supported method.

never

The platform does not expose the field.

Remains null in normalization.

Return null with the explicit reason.

unverified

Recorded evidence has not verified availability.

Requires an evidence-backed review.

Return null with the explicit reason.

Value semantics

Null guarantees

MEASURED VALUE0

Measured nothing

Zero is evidence and remains numeric.

NO VALUEnull

No backed value

Never and unverified include reasons. Other nulls may have a null reason.

Evidence scope

Modeled boundary

Classification, not coverage

The baseline maps nine fields across three destinations. A non-never state does not prove that Postdom currently returns a value.

estimable means suitable evidence could support derivation. Postdom does not currently promise that computation.

Labeled example

Example detail

This synthetic excerpt shows the explicit reason guaranteed for an unverified field.

EXAMPLE AVAILABILITY DETAIL · SYNTHETIC VALUES

{
  "saves": null,
  "availability": {
    "saves": {
      "state": "unverified",
      "verified_at": null,
      "reason": "instagram.saves is unverified; no evidence-backed value is available yet."
    }
  }
}