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transformer-lens

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<!-- AUTO-GENERATED by export-skills.py — DO NOT EDIT -->
---
name: transformer-lens
description: TransformerLens mechanistic interpretability library. Use when analyzing transformer internals with hook-based activation access.
---

# TransformerLens: Mechanistic Interpretability for Transformers

TransformerLens is the de facto standard library for mechanistic interpretability research on GPT-style language models. Created by Neel Nanda and maintained by Bryce Meyer, it provides clean interfaces to inspect and manipulate model internals via HookPoints on every activation.

**GitHub**: [TransformerLensOrg/TransformerLens](https://github.com/TransformerLensOrg/TransformerLens) (2,900+ stars)

## When to Use TransformerLens

**Use TransformerLens when you need to:**
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