What problem does it solve? Creating consistent hand-drawn whiteboard-style concept illustrations for slides and educational material normally requires a human illustrator; this Skill produces them through the Gemini API with a fixed visual style, correct in-image text, and a mandatory verification loop. ## Core Features & Use Cases - Style-anchored generation: Embeds two shipped reference PNGs in every Gemini call so output stays within a consistent Excalidraw rough-sketch aesthetic across a whole deck. - Text-correctness techniques: A seven-section prompt template with letter-by-letter spelling blocks and framed-text rules keeps labels legible and correctly spelled; a two-phase Pillow overlay fallback fixes stubborn misspellings locally. - Gated cost control: Requires GEMINI_API_KEY and explicit per-call user consent, with aspect-ratio selection (16:9, 1:1, 4:3) asked before every paid call. - Use Case: A teacher needs a two-panel illustration comparing Realism and Naturalism for a slide deck; the Skill asks for the aspect ratio, builds the structured prompt with spelled-out author names, calls gemini-3-pro-image-preview, verifies every word in the PNG, and saves a descriptively named file. ## Quick Start Ask the assistant to create an Excalidraw-style hand-drawn illustration of your concept, for example: "Make an Excalidraw-style illustration of the OSI network stack in 16:9 for my slides."
