Add comprehensive support for Z-Image-Turbo (S3-DiT) models including:
Backend:
- New BaseModelType.ZImage in taxonomy
- Z-Image model config classes (ZImageTransformerConfig, Qwen3TextEncoderConfig)
- Model loader for Z-Image transformer and Qwen3 text encoder
- Z-Image conditioning data structures
- Step callback support for Z-Image with FLUX latent RGB factors
Invocations:
- z_image_model_loader: Load Z-Image transformer and Qwen3 encoder
- z_image_text_encoder: Encode prompts using Qwen3 with chat template
- z_image_denoise: Flow matching denoising with time-shifted sigmas
- z_image_image_to_latents: Encode images to 16-channel latents
- z_image_latents_to_image: Decode latents using FLUX VAE
Frontend:
- Z-Image graph builder for text-to-image generation
- Model picker and validation updates for z-image base type
- CFG scale now allows 0 (required for Z-Image-Turbo)
- Clip skip disabled for Z-Image (uses Qwen3, not CLIP)
- Optimal dimension settings for Z-Image (1024x1024)
Technical details:
- Uses Qwen3 text encoder (not CLIP/T5)
- 16 latent channels with FLUX-compatible VAE
- Flow matching scheduler with dynamic time shift
- 8 inference steps recommended for Turbo variant
- bfloat16 inference dtype
Fixes errors like `AttributeError: module 'cv2.ximgproc' has no
attribute 'thinning'` which occur because there is a conflict between
our own `opencv-contrib-python` dependency and the `invisible-watermark`
library's `opencv-python`.
* build: prevent `opencv-python` from being installed
Fixes this error: `AttributeError: module 'cv2.ximgproc' has no attribute 'thinning'`
`opencv-contrib-python` supersedes `opencv-python`, providing the same API + additional features. The two packages should not be installed at the same time to avoid conflicts and/or errors.
The `invisible-watermark` package requires `opencv-python`, but we require the contrib variant.
This change updates `pyproject.toml` to prevent `opencv-python` from ever being installed using a `uv` features called dependency overrides.
* feat(ui): data viewer supports disabling wrap
* feat(api): list _all_ pkgs in app deps endpoint
* chore(ui): typegen
* feat(ui): update about modal to display new full deps list
* chore: uv lock
Add `heuristic_resize_fast`, which does the same thing as `heuristic_resize`, except it's about 20x faster.
This is achieved by using opencv for the binary edge handling isntead of python, and checking only 100k pixels to determine what kind of image we are working with.
Besides being much faster, it results in cleaner lines for resized binary canny edge maps, and has results in fewer misidentified segmentation maps.
Tested against normal images, binary canny edge maps, grayscale HED edge maps, segmentation maps, and normal images.
Tested resizing up and down for each.
Besides the new utility function, I needed to swap the `opencv-python` dep for `opencv-contrib-python`, which includes `cv2.ximgproc.thinning`. This function accounts for a good chunk of the perf improvement.
This allows it to pull in sentencepiece on its own. In 0.10.0, it didn't have this package listed as a dependency, but in recent releases it does. So we are able to remove sentencepiece as an explicit dep.
