The button on each card in the Template Library and Your Templates is now Modify Template. Clicking it opens /ai/chat with the chosen template already fetched, pre-rendered into the workspace pane, and primed in the system prompt. You see the starting PDF first, then describe the changes you want — colours, sections, copy, layout — and the assistant edits the DSL and re-renders in place.
When you're happy, save the template. Library seeds become a new row under your account; user-template seeds update the existing row in place. The workspace then shows the API recipe — a templateId plus a copy-pasteable two-step POST /api/v1/render snippet — so the path from "I like this" to "wired into my backend" is one screen.
The form-fill detail page at /templates/<id> is gone. The library exists to launch you into API integration, not to compete with consumer "fill in fields, download a PDF" tools — modifying a template through chat is faster and lands you with the artifact you actually need.