Implements the backend slice (B1-B7) of
lm-civitai-extension/docs/other-models-support.md, which lets the companion
browser extension detect, badge and download the opt-in Other Models types
(VAE / upscaler / text encoder / CLIP vision / ControlNet).
ModelLibraryHandler:
- _normalize_model_type() learns the CivitAI other aliases (vae, upscaler,
textencoder, clip, clipvision, controlnet, other) and maps them to "other".
- _get_scanner_for_type() resolves "other" through the other scanner, but only
while enable_other_models is on, so model-versions-status and
model-version-download-status keep their legacy 400 when the feature is off.
- check_model_exists() / check_models_exist() consult the other scanner last
(lora -> checkpoint -> embedding -> other) and report modelType "other".
With the feature disabled both endpoints stay byte-identical to before and
the other scanner is never touched.
DownloadManager:
- The four other-type default-path failures now carry a machine-readable
"reason" (contract C4): other_models_disabled, other_sub_type_disabled,
other_no_default_root, other_sub_type_undecidable. The user-facing "error"
strings are unchanged; the key is additive and reaches the client because
both download endpoints pass the result dict through verbatim.
Tests cover the opt-in on/off branches for both existence endpoints, mixed
lora + other ids in the batch endpoint, the CivitAI alias acceptance and the
400 regression for unknown types, and the exact reason/error pairs for all
four download failure modes.
Will Miao
b5c1331911