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name: model-internals description: "Explain and verify the photo2cartoon generator, discriminator, normalization layers, face-ID feature path, tensor utilities, and checkpoint structure." disable-model-invocation: true metadata: disco-role: operating license: MIT

Model Internals

Use this sub-skill for the model core only: architecture, forward signatures, normalization layers, checkpoint contents, and safe synthetic verification.

Start here

• Architecture reference for generator/discriminator tuples, hourglass topology, Soft-AdaLIN / LIN behavior, CAM heatmaps, and verified smoke shapes.
• Training object reference for UgatitSadalinHourglass, losses, optimizer setup, checkpoint keys, and save/load behavior.
• Face ID loss reference for FaceFeatures, MobileFaceNet cropping, 112×112 embeddings, and cosine-distance loss.
• Image and tensor utilities for normalization range, CAM rendering, and helper semantics.
• Troubleshooting for shape mismatch, checkpoint key errors, deprecated F.upsample, device mismatch, and missing face-ID assets.
• Synthetic smoke for safe forward checks and optional checkpoint/face-ID validation.

Route elsewhere

• Inference commands, asset download steps, and end-user cartoon generation workflows -> ../portrait-inference/
• Face detection, alignment, crop, and segmentation details -> ../preprocessing/
• Dataset layout, preprocessing batches, CLI training, and long-running optimization -> ../data-and-training/

What this sub-skill covers

• ResnetGenerator, Discriminator, HourGlass, HourGlassBlock, ResnetBlock, ResnetSoftAdaLINBlock, SoftAdaLIN, adaLIN, and LIN
• Generator and discriminator return tuples: (out, cam_logit, heatmap)
• CAM logits and heatmap interpretation
• Tensor normalization range used by the repo
• Face-ID embedding path through MobileFaceNet(512)
• Training checkpoint contents and safe load checks
• Safe synthetic verification only; no downloads, no training, no destructive writes

Practical commands

python scripts/model_forward_smoke.py --help
python scripts/model_forward_smoke.py --repo-root /path/to/photo2cartoon
python scripts/model_forward_smoke.py --repo-root /path/to/photo2cartoon --checkpoint /path/to/checkpoint.pt --face-model /path/to/model_mobilefacenet.pth