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NVIDIA NeMo Fabric Hermes Agent Adapter

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Diagram showing NeMo Fabric connecting applications, evaluation systems, and reinforcement learning rollouts to harnesses and custom agents, with results, artifacts, and telemetry as outputs.

nemo-fabric-adapters-hermes provides a NeMo Fabric adapter for use with Hermes Agent.

Install

The adapter supports Python 3.11 through 3.14. The merged upstream Hermes Relay integration requires Python 3.14. Hermes Agent 0.20 and later is not installable from PyPI. Install Hermes Agent by following the Hermes Agent installation guide, then install the NeMo Fabric packages into the Python environment that runs Hermes Agent.

The following table shows which NeMo Fabric components each package expression provides. None of these expressions installs Hermes Agent:

Installation Runtime Adapter Harness NeMo Relay Python Package
pip install nemo-fabric nemo-fabric-adapters-hermes Yes Yes No No
pip install "nemo-fabric-adapters-hermes[full]" No Yes No Yes
pip install "nemo-fabric-adapters-hermes[relay]" No Yes No Yes
pip install nemo-fabric-adapters-hermes No Yes No No

Released Hermes Agent v2026.9.24 requires Relay 0.8.x. Ordinary runs remain supported in a separate environment. Relay telemetry and streaming require a Hermes release with Relay 0.9 support; NeMo Fabric tests the merged upstream revision until such a release is available. Use the relay and full extras only with a compatible Hermes checkout. The adapter fails at startup if Relay telemetry is enabled with an incompatible Hermes or Relay installation.

Refer to the installation guide for more details.

Metadata

Release files for nemo-fabric-adapters-hermes 0.5.0a20261011

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