Keeps the model's uncertainty out of the UI: decide_identity() separates raw
matcher scores into accepted / ambiguous / unknown / rejected, and only an
accepted result can name a SKU. Zero evidence is rejected, never a product.
observe.py adds frame-local observations and one-zone scan sessions (draft,
finalize, cancel, rescan) with replay, staleness and backpressure rules.
pipeline.process_click() now reports the identity level instead of failing
when the match is not accepted.
Incorporates earlier uncommitted session work in this repository
(identity.py, observe.py, yolo_adapter.py, test_observe.py, and the pipeline
hunk those needed); yolo_adapter keeps its decoded frame per thread so
concurrent sessions cannot swap images.
Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
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