Use when the user asks you to build, edit, redesign, or export an AI-generated slide deck in Substrate — the desktop app with a local MCP server at http://127.0.0.1:4321/mcp. Triggers on: any substrate:* tool being available, "build a deck in Substrate", "make a slide deck", a deck/slide the user is editing in Substrate, or "open Substrate". Covers the build loop, writing render-quality slide prompts, applying brand designs, the propose/review flow, and known gotchas. Out of scope: editing pixels — Substrate has no pixel/layer surface by design.
2026-06-11