Built-in extensions

The repository ships 12 in-tree extensions under extensions-builtin/. They are loaded by the same machinery as user-installed extensions in extensions/, but they're version-locked to the webui — you can't update them independently.

This is the closest thing the project has to "packages". The Lora extension is large enough to deserve its own page; the rest are summarised here.

Extension	Page
Lora and LyCORIS	lora.md
Other built-in extensions	other.md

The reason these live as extensions rather than being baked into modules/ is mostly historical: each was born as an external add-on, then absorbed for distribution convenience. Disabling them via --disable-all-extensions actually does turn them off — at the cost of <lora:...> syntax, the Lora browser, LDSR and SwinIR upscalers, hypertile, mobile UI fixes, and a handful of smaller QoL features.

Layout

extensions-builtin/
├── Lora/                          # Lora + LyCORIS support and the model patcher
├── LDSR/                          # latent diffusion super-resolution upscaler
├── ScuNET/                        # ScuNET upscaler
├── SwinIR/                        # SwinIR / Swin2SR upscalers
├── canvas-zoom-and-pan/           # zoom/pan helpers in the inpainting canvas
├── extra-options-section/         # configurable "extra options" toolbar
├── hypertile/                     # tfernd's HyperTile attention optimisation
├── mobile/                        # touch-friendly UI shims
├── postprocessing-for-training/   # an Extras-style postprocessor available during training preprocess
├── prompt-bracket-checker/        # warns when () / [] are unbalanced
└── soft-inpainting/               # smooth-mask inpainting via cfg_denoiser hook

Each follows the same pattern an external extension would: a scripts/ directory plus optionally style.css, javascript/, and metadata.ini. The framework imports them through the same load_scripts() walk as user extensions (systems/scripts-and-extensions.md).