Main idea

The usual chain has only two floors: the raw material on one side, the documents produced on the other. One is missing in the middle — what has been understood, before being transformed for someone.

That layer gathers stabilized ideas, definitions, assumptions, contradictions, decisions, examples, limits, relationships between ideas, points to verify. Its peculiarity is negative and that is what defines it: it addresses no one. Not the client, not the developer, not the reader.

It speaks to the work itself. Its criterion is therefore not elegance, it is reusability.

In product work, this layer has an identifiable content: sources, transcribed interviews, atomic and thematic notes, glossaries, decisions, standards, product data, queries, analyses, customer signals, and the links between existing features and missing ones. It sits upstream of the tracking tool, which only receives an already structured result.

Layer added by "The Backlog Is Not a Dumping Ground: It's a Tool for Action" (2026-06-03).

Why it matters

Without that floor, every output has to be born either from the raw material — too costly to redo each time — or from another output, which makes you inherit choices that aren't yours. The intermediate layer is what makes it possible to produce several times without starting from zero and without starting askew.

And the fact that it addresses no one is not a lack: it is exactly what makes it addressable to everyone afterwards.

Nuances and limits

A badly kept intermediate layer becomes a third place to search, solving nothing. Its value lies in its discipline, not in its existence.

And it isn't free: maintaining it has a cost that has to be paid during the work, that is, before its usefulness is demonstrated.

Open questions

• What minimum granularity makes this layer reusable without turning it into an archive?