Agentic Workflow Turns Doodles into Charcoal Sketches
Boydbme · reddit · 2026-07-14
The author built an agentic workflow to automatically transform Remarkable tablet doodles into high-quality charcoal sketches. Instead of just outputting a static image, it preserves editable vector strokes.
Workflow
- Sketch and select it on the Remarkable.
- An agent reads the device screenshot and generates a creative brief.
- Another agent generates a charcoal-style image based on the brief and the sketch.
- A post-processing pipeline splits the result into multi-layer vectors: line art, shadows, and highlights.
- All vectors are converted back into Remarkable stroke data, injected directly into the clipboard, and pasted back onto the tablet to overwrite the original sketch.
Implementation Details
- Brief agent: Qwen
- Image generation: Nano-Banana-Lite
- Result QA: Qwen checks if it matches the brief
- Cost per generation is about $0.04
- Up to 3 rounds per attempt; if all fail, Qwen selects the best result
The author emphasizes that the effect is "like magic" and can be undone with a single click to revert to the original sketch.
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