Geometric Latent Biopsy: Zero-Shot Anomaly Detection in LLM Residual Streams
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| Natura: | Recurso digital |
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2026
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| _version_ | 1866901492005339136 |
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| author | Llorente-Saguer, Isaac |
| author_facet | Llorente-Saguer, Isaac |
| contents | A zero-shot geometric anomaly detector for LLM residual streams. The method identifies harmful or anomalous prompts by measuring angular deviations from a normative (safe) manifold in hidden representations, using PCA-derived reference directions and Gaussian Mixture Model scoring. No harmful examples are required at fit time under the normative reference strategy. |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_19294977 |
| institution | Zenodo |
| language | |
| publishDate | 2026 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Geometric Latent Biopsy: Zero-Shot Anomaly Detection in LLM Residual Streams Llorente-Saguer, Isaac large-language-models anomaly-detection interpretability residual-stream safety geometric-methods PCA gaussian-mixture-model A zero-shot geometric anomaly detector for LLM residual streams. The method identifies harmful or anomalous prompts by measuring angular deviations from a normative (safe) manifold in hidden representations, using PCA-derived reference directions and Gaussian Mixture Model scoring. No harmful examples are required at fit time under the normative reference strategy. |
| title | Geometric Latent Biopsy: Zero-Shot Anomaly Detection in LLM Residual Streams |
| topic | large-language-models anomaly-detection interpretability residual-stream safety geometric-methods PCA gaussian-mixture-model |
| url | https://doi.org/10.5281/zenodo.19294977 |