Nice and I'm thinking along similar lines but not DSLs.

My intuition off reading what you wrote is... Nobody is gonna want to write PTLs and ISLs.

Exactly right, and that's the core point. Users don't write PTL or ISLs. Let's say you have customer interactions (fetched from Zoom) or product/research notes. The AI structures that into PTL automatically. You see clean, editable notes and visual wireframes + high-fidelity prototypes and prompts. The structured formats exist in the background for token efficiency and interoperability.