get_download_path_template() fell back to "{base_model}/{first_tag}" for any
unconfigured model type, so other-model downloads were silently nested under an
arbitrary CivitAI tag even though the settings UI exposes no template row for
"other" and priority_tags has no "other" entry (making {first_tag} resolve to
tags[0]).
Add DEFAULT_DOWNLOAD_PATH_TEMPLATES with other -> "" so unconfigured and
unknown types resolve to a flat layout under the already sub_type-scoped
default_other_roots; explicit settings.json values still win. Mirror the flat
default in the frontend DEFAULT_PATH_TEMPLATES and stop the download/move
default-path previews from rendering "/undefined" or a dangling slash.
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.
Other Models management is now opt-in: enable_other_models (default false)
plus the enabled_other_sub_types allow-list replace the unreleased additive
enabled_other_folders key.
- config._get_enabled_other_folder_keys() is the single scan gate; a new
refresh_other_roots() rebuilds roots and preview roots on toggle.
- ModelScanner gains a _should_keep_cached_entry() hydration hook and
on_library_changed(reconcile=...) so switching a sub_type off drops its
entries (and hash/autov3 rows) at load time and switching it on rescans.
- OtherScanner filters location-derived entries accordingly.
- Other routes reject every other type while off (or a disabled sub_type) and
expose an "other_disabled" page flag; download routing returns a disabled
marker instead of guessing; the download manager refuses other-type
downloads and default-path routing for switched-off sub_types.
- Doctor / init-status / refresh-all skip the other scanner while off; the
scanner stays registered so staged pending-deletes still merge.
- Tests updated with explicit opt-in fixtures plus new gating coverage.
Will Miao