Adds a `flux_unet` model family for Flux.1 D checkpoints that ship only the
UNet weights (no baked-in CLIP/T5/VAE) and require external encoder loading.
Affected checkpoints: lust_v10, cyberrealisticFlux_v25,
getphatFLUXReality_v11Softcore, moodyDesireMix_v20PRO,
fcFluxPonyPerfectBase. These live in `models/diffusion_models/` (or
`models/unet/`) on the ComfyUI host and are loaded via UNETLoader instead
of CheckpointLoaderSimple.
Detection:
- New `FLUX_UNET_ONLY_PATTERNS` constant in config.py lists known
UNet-only filename substrings.
- `detect_model_family()` returns `flux_unet` when any pattern matches,
taking precedence over base_model field (same architecture-override
pattern used for FluxPony hybrids).
Workflow:
- New flux_unet workflow in comfyui.py uses UNETLoader + DualCLIPLoader
(clip_l.safetensors + t5xxl_fp16.safetensors, type=flux) + VAELoader
(ae.safetensors) wired into the same Flux KSampler graph as the
monolithic flux family.
- Family defaults inherit from flux (sampler/scheduler/steps/cfg) with
external_clip flag set.
Smoke-tested end-to-end on madcat with getphatFLUXReality_v11Softcore
producing valid output. Flux.2 Klein checkpoints (lust_v10,
moodyDesireMix) still fail because they require a different text encoder
(qwen_3_8b) — see follow-up commit.
13 new tests; 240 -> 253 total.
aladac
3e04929515