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name: sar_reliable_entropy_filter description: Use this skill when implementing SAR reliable entropy minimization, entropy-margin filtering, or proxy checks for selected samples.

Reliable Entropy Filter

When To Use

Use this skill for SAR stable test-time adaptation work that needs: Compute softmax entropy and select reliable samples below the SAR entropy margin. Do not use it as a generic ImageNet-C runner or as permission to read the original SAR repository during recovery.

Inputs

• logits, class count, optional margin

Outputs

• per-sample entropy values, selected indices, mean reliable entropy

Workflow

1. Read the caller-provided stream, logits, parameter metadata, or entropy trace.
2. Apply the SAR-specific invariant documented in this skill: Entropy is a practical proxy for excluding samples with large noisy gradients during online adaptation.
3. Produce structured numeric evidence for recovery logs.
4. Keep proxy/reduced results explicitly labeled when the full ImageNet-C runtime is unavailable.

Validation

Run python scripts/reliable_entropy_filter.py when the script has a CLI, then run python -m pytest tests or the Distiller skill validator with --run-tests.

Limitations

This skill captures a reusable SAR mechanism. It does not contain pretrained weights, ImageNet-C data, or original repository code, and it should be combined with other SAR skills for end-to-end recovery.