Kontext is wayward in terms of wanting to resize things. But it’s a matter of getting the prompt right, for exact 1:1 registration.
Add a layer of simple black and white lineart, while showing the photo beneath and keeping identical subject placement, camera angle, framing and perspective.
Layer the result in Photoshop, and blend via Multiply. Brush a soft eraser over teeth etc. Then filter the base photo to lighten it up. I imagine it would blend nicely with a Poser real-time comic-book lineart render, for added line variation. You’re welcome.
Source image from the official test workflow. Using the official default GGUF workflow, but made compact by moving things around and with upscaling nodes removed.