Introducing Substrate.
AI slide decks where you edit the prompt, not the pixels.
Pixels can't be diffed, reviewed, or co-authored. Prompts can. So in Substrate the rendered slide is just a build output: deck design prompt + slide prompt in, image out.
Humans edit in the UI, agents edit over MCP, same artifact. Version history, propose/approve review, seed-pinned regeneration.
Open source, MIT, installers for all three platforms:
https://t.co/x5x7CWkcG8