hierarchy_tag pattern match may have bug

[fangyangci]

Pattern match:
HTP metadata success
hierarchy_tag none
PatternMatcher success

example model:
models\opset17\benchmark_opset17\onnx_models_wmk_exported\convnext-tiny-224.onnx

[DingmaomaoBJTU]

Triage Summary (2026-06-26)

Classification: Bug
Priority: P2
Component: static-analyzer (pattern matching)
Assigned to: @zhenchaoni

Analysis: The hierarchy_tag pattern matcher returns none while HTP metadata and PatternMatcher succeed for the same model (convnext-tiny-224). This indicates a logic gap specific to the hierarchy_tag matching path. Likely a missing rule or incorrect fallback in the pattern extractor.

Next steps: Investigate pattern_extractor.py and hierarchy_tag matching logic. Reproduce with the convnext-tiny-224 model to confirm the regression scope.