Design concept

The shared understanding of what's being built, held in common between user and agent but separate from any asset. Brookes' term (The Design of Design): the conversation, handoff artifacts, and the code are all assets that try to capture or reach the design concept, but none of them are it. Quality of the design concept is felt through the quality of the conversation that built it.

Usage:

"It's writing exactly what I asked for and it's still wrong."

"You don't share a design concept yet — it's filling gaps with assumptions. Keep talking until cancellation, refunds, and partial fulfilment all line up between you before you let it write a spec."