- A preview cancelled while its file opens closes the handle and only
then ends the pin, so a doomed capture is never unlinked while open.
- An observe cancelled while capturing or reading releases the capture
instead of leaving it until the idle expiry.
- The model gate takes an on_skipped callback that runs once when the
work never starts; Generate passes the capture's release_use, so an
executor refusal no longer leaks a pin against the capture budget.
- The preview answers a single byte range with 206 and Content-Range
(416 for an unsatisfiable or multi-range header), still streamed inside
the pin, so Safari and WebKit can play video captures.
- _coded maps tag-limit (400), metadata-conflict and vocabulary-conflict,
and falls back to 409 with a fixed sentence for any other code instead
of raising KeyError.
- py/model_gate.py: one process-wide, non-blocking gate for loading,
swapping, running, downloading and unloading a tagging model. Worker
calls run shielded; a release requested while one still runs takes
effect only when it exits (client disconnect keeps the gate).
- Legacy /autotag/single, /start, /download/{type} and /unload hold the
gate and answer 409 {code: "model-busy"} while another operation holds
it; their bodies are otherwise unchanged. /autotag/models gains
suggestion_limit.
- AutoTagService.generate_tag_suggestions: WD14 (name, probability) best
first, GGUF/HF (name, None) in output order, first `limit` distinct
case-insensitively; generate_tags keeps its return; the image file is
closed before inference returns.
- POST /prompt_manager/image-annotations/suggest runs one engine on the
pinned capture, with strict per-engine options, never downloads
(409 model-unavailable) and never writes.
- config.json autotag.defaults.suggestion_limit, integer 1..100, default
10, validated on load.
- Capture probe decides Generate from the image header alone, so prompt
metadata over the inspection budgets no longer blocks it.
POST /prompt_manager/image-annotations/observe captures the file named by
the listing identity {root_index, root_scope, path} (scope checked against
the current roots before any file access) and answers the saved tag set of
exactly those bytes, refreshing a matching record's verified fingerprint.
GET/DELETE .../capture/{token} serve the private copy (no-store, nosniff,
pinned with acquire/release_use while it streams) and release it.
PUT .../tags re-hashes the current file and writes only when it still
holds the captured bytes, under the storage epoch and tag revision
(file-changed, storage-changed, tag-conflict, tag-limit, replayed).
Bodies are capped at 64 KiB with unknown fields refused; envelopes never
carry server paths or locators. Restores invalidate every capture and the
host's cleanup removes the capture directory.
Vito Sansevero