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Add vLLM Hook blog post#218

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IRENEKO:blog/vllm-hook
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Add vLLM Hook blog post#218
IRENEKO wants to merge 2 commits into
vllm-project:mainfrom
IRENEKO:blog/vllm-hook

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@IRENEKO

@IRENEKO IRENEKO commented May 27, 2026

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Summary

Adds a blog post introducing vLLM Hook, an open-source plugin for vLLM that exposes internal states (attention, attention heads, hidden states, activations) for inference-time monitoring and intervention.

The post covers:

  • Two programming modes: passive (probe & save internal states) and active (intervene during inference)
  • Three example applications: Attention Tracker (safety guardrail), Activation Steering (instruction following), and Selective Retrieval (re-ranking via attention-head selection)
  • A benchmark of vLLM Hook vs. native vLLM Eagle (ExampleHiddenStatesConnector) for hidden-state extraction across prompt lengths and layer counts

@IRENEKO IRENEKO changed the title Add blog post: vLLM Hook Add vLLM Hook blog post May 27, 2026
IRENEKO added 2 commits June 9, 2026 04:13
…ing vLLM Model Internal States

Introduces vLLM Hook, an open-source plugin that exposes vLLM internal
states (attention, attention heads, hidden states, activations) for
inference-time monitoring and intervention. Covers three use cases —
in-model safety guardrails (Attention Tracker), activation steering for
instruction following, and selective retrieval for re-ranking — and
benchmarks vLLM Hook vs. native vLLM Eagle for hidden-state extraction.

Signed-off-by: IRENEKO <cyko@ibm.com>
The folder was relocated under docs/ in IBM/vLLM-Hook to declutter the
repo root.

Signed-off-by: IRENEKO <cyko@ibm.com>
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