Install Hermes Plugins

Hermes plugins extend the Hermes runtime inside a NemoClaw-managed sandbox. They are different from NemoClaw skills and from OpenClaw plugins, so install them through the Hermes plugin path instead of skill install.

How Hermes Loads Plugins

NemoClaw sets HERMES_HOME to /sandbox/.hermes when it starts the Hermes gateway. Hermes can discover bundled plugins under /opt/hermes/plugins/<plugin-name> and user plugins under $HERMES_HOME/plugins/<plugin-name>. NemoClaw supports the image-owned bundled path so the sandbox agent cannot replace code later executed by the separated gateway identity. NemoClaw installs its built-in Hermes integration into the image-owned bundled-plugin path at /opt/hermes/plugins/nemoclaw.

The built-in NemoClaw Hermes plugin provides sandbox status tools, managed-tool broker patches, and runtime grounding for the OpenShell sandbox. Do not replace or remove /opt/hermes/plugins/nemoclaw when you add your own plugin. The root-separated gateway ignores /sandbox/.hermes/plugins because it cannot trust sandbox-writable Python. The same-identity topology retains Hermes’ upstream user-plugin behavior, and rebuilds continue to preserve that directory as agent state; image-bundled plugins are the supported path across both topologies. After an upgrade, root-separated startup warns when preserved user plugins are present; rebuild any required plugin into /opt/hermes/plugins before relying on it.

Configure the Bundled Hindsight Plugin

The stock Hermes image provides /sandbox/.hermes/lazy-packages for lazy dependencies used by interactive sandbox commands. The gateway target depends on the container process topology.

Neither target modifies the root virtual environment, and neither target is declared in the generated .env file.

NemoClaw supports hindsight-client==0.6.1 for this workflow. NemoClaw accepts only the reviewed wheel hashes for hindsight-client==0.6.1 and aiohttp-retry==2.9.1. Setup or gateway startup stops if an index or mirror serves a different artifact under either version. Hermes checks this version before it loads the plugin. This version uses the OpenShell proxy path. Do not replace it with a 0.8.x client because those releases do not use the proxy environment.

Start the self-hosted Hindsight service on the host before you configure the plugin. The local-memory preset permits only GET and POST requests from the Hermes Python runtime to host.openshell.internal on port 8888. The preset does not permit another private host or port.

Add the preset to the sandbox:

$
nemohermes <name> policy add local-memory --yes

Run the Hermes setup command through the NemoClaw CLI:

$
nemohermes <name> exec --tty -- hermes memory setup hindsight

Select local_external when Hermes asks for the connection mode. Set the API URL to http://host.openshell.internal:8888. Set the memory bank name for your workload. Accept the hermes default if you do not need a workload-specific name. After the setup command finishes, restart the gateway:

$
nemohermes <name> gateway restart

The setup command installs hindsight-client==0.6.1 under /sandbox/.hermes/lazy-packages for the sandbox-side command. In the direct root-entrypoint topology, gateway startup independently installs the supported client into /run/nemoclaw/hermes-gateway-lazy-packages as the gateway user. The gateway does not activate the sandbox-owned tree in that topology. In the OpenShell-managed topology, gateway startup uses /sandbox/.hermes/lazy-packages under the shared sandbox UID. Both directories are outside the generated .env, config.yaml, and .config-hash files.

Verify the provider and dependency after the restart:

$
nemohermes <name> exec -- hermes memory status
$
nemohermes <name> exec -- python -c 'import os, sys; sys.path.insert(0, os.environ["HERMES_LAZY_INSTALL_TARGET"]); import hindsight_client; print(hindsight_client.__version__)'
$
nemohermes <name> status

The version command must print 0.6.1. The status command must report a running Hermes gateway without an integrity failure or quarantine.

If an earlier root install changed /opt/hermes/.venv, rebuild the sandbox before you use the lazy-install path:

$
nemohermes <name> rebuild --yes

A rebuild replaces the root virtual environment and preserves the sandbox lazy-install directory as declared Hermes state. Direct root-entrypoint startup recreates its private runtime target when the container has been replaced and reinstalls the supported client as the gateway user when Hindsight is selected. OpenShell-managed startup uses the preserved sandbox target under the shared sandbox UID.

Do not edit /sandbox/.hermes/.env to set HERMES_LAZY_INSTALL_TARGET. Do not install the dependency into /opt/hermes/.venv. Both paths change generated inputs and can make gateway reconciliation fail.

The preset permits one local host route only. To use another approved Hindsight host or port, create a custom preset and name the endpoint. The --from-file and --from-dir paths accept --trusted-private-host for a private host. Refer to Create Custom Policy Presets for that procedure.

Choose an Install Path

The supported path for custom Hermes plugins is to bake the plugin into a custom sandbox image and onboard from that Dockerfile. Use this path when the plugin adds Python code, runtime hooks, or dependencies that Hermes must see at gateway startup.

nemohermes <name> skill install <path> is only for SKILL.md agent skills. It places the validated tree in Hermes’ canonical writable user-skill root, but it does not install Hermes runtime plugins or maintain a separate NemoClaw skill inventory.

When you change plugin code or dependencies, update the custom image and rebuild the sandbox so the plugin remains reproducible. When you change a supported startup-only setting with a NemoClaw host command, restart the Hermes gateway from the host:

$
nemohermes <name> gateway restart

The command reloads supported startup-only state through NemoClaw’s authenticated lifecycle controller. Use nemohermes <name> config set or nemohermes inference set for supported configuration changes so NemoClaw updates managed config metadata together. For the controller topology, trust boundary, health proof, and fail-closed behavior, refer to Understand Gateway Lifecycle Control.

Prepare a Build Directory

Put the custom Dockerfile and every file it needs to COPY in one directory. nemohermes onboard --from <Dockerfile> sends the Dockerfile’s parent directory as the Docker build context.

The one exception is the managed Hermes Dockerfile itself: passing the agents/hermes/Dockerfile from the NemoClaw checkout the CLI runs from stages the repository root as the build context, exactly as the managed build does. The managed exception applies the .dockerignore from the repository root, not one under agents/hermes/. Use that path when you want to edit the managed Dockerfile in place (for example, to install extra Python packages) and rebuild the stock image with your changes.

For a standalone custom Dockerfile, add a .dockerignore next to the Dockerfile to keep local caches, generated artifacts, model files, or other unneeded paths out of the staged context. NemoClaw still excludes credential-like paths such as .env*, .ssh/, .aws/, .npmrc, secrets/, *.pem, and *.key, even if .dockerignore tries to include them.

NemoClaw sends user-supplied --from contexts to the OpenShell gateway builder and reserves its host-side local BuildKit prebuild for contexts that NemoClaw generates itself. On a local Docker-driver gateway, a Local BuildKit build skipped notice is expected and the custom image build continues through the gateway. The managed Hermes Dockerfile keeps image probes in a checked-in runner so OpenShell gateway builders without Dockerfile heredoc support execute the same assertions.

my-hermes-plugin-sandbox/
├── Dockerfile
└── my-hermes-plugin/
    ├── __init__.py
    └── requirements.txt

If you start from the stock NemoClaw Hermes Dockerfile, keep the NemoClaw Hermes image contract intact. The image must still include the generated Hermes config, NemoClaw Hermes plugin, blueprint files, nemoclaw-start entrypoint, root-only gateway control helper, root-only managed controller, and shared supervisor library.

If gateway restart or recover reports privileged control unavailable for an older custom image, update the Dockerfile to the current Hermes image contract and rebuild it with nemohermes <name> rebuild --yes. The current contract supports a direct root entrypoint and the OpenShell-managed topology where OpenShell is PID 1 and launches nemoclaw-start as nonroot.

An arbitrary nonroot entrypoint that does not match the supported OpenShell-managed process shape cannot use lifecycle control. Kubernetes and other deployments without a matching direct container fail closed and do not fall back to ordinary openshell sandbox exec or an in-sandbox manual relaunch.

Install the Plugin in the Image

Add your plugin to Hermes’ bundled-plugin tree while the custom image is built. The example below keeps executable Python root-owned and non-writable at runtime.

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COPY my-hermes-plugin/ /opt/my-hermes-plugin/
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USER root
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RUN mkdir -p /opt/hermes/plugins/my-hermes-plugin \
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    && cp -a /opt/my-hermes-plugin/. /opt/hermes/plugins/my-hermes-plugin/ \
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    && if [ -f /opt/my-hermes-plugin/requirements.txt ]; then \
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        /opt/hermes/.venv/bin/python -m pip install --no-cache-dir -r /opt/my-hermes-plugin/requirements.txt; \
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    fi \
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    && chown -R root:root /opt/hermes/plugins/my-hermes-plugin \
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    && find /opt/hermes/plugins/my-hermes-plugin -type d -exec chmod 0755 {} + \
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    && find /opt/hermes/plugins/my-hermes-plugin -type f -exec chmod 0444 {} +
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USER sandbox
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WORKDIR /sandbox

Keep plugin code and dependency files inside the build directory. Avoid copying host credentials, local caches, or broad home-directory contents into the image.

Create the Sandbox

Run onboarding with the custom Dockerfile and an explicit sandbox name. NemoClaw requires a name for --from builds so a custom image cannot silently replace the default sandbox.

$
nemohermes onboard --name my-hermes-build --from ./my-hermes-plugin-sandbox/Dockerfile

For non-interactive onboarding, set the same values through environment variables.

$
NEMOCLAW_NON_INTERACTIVE=1 \
>
NEMOCLAW_SANDBOX_NAME=my-hermes-build \
>
NEMOCLAW_FROM_DOCKERFILE=./my-hermes-plugin-sandbox/Dockerfile \
>
nemohermes onboard

If you resume an interrupted onboarding run, use the same Dockerfile path that started the session. NemoClaw records the custom Dockerfile path and rejects a resume that points at a different image source.

Network Access

Hermes plugins still run inside the OpenShell sandbox boundary. If a plugin calls an external API at runtime, add a policy preset for the required hostnames and binaries before you recreate the sandbox.

Hermes uses Python for plugin execution, so policy entries usually need to allow the Hermes Python runtime, such as /opt/hermes/.venv/bin/python, in addition to any command-line wrapper your plugin starts. For package downloads during sandbox runtime, use the pypi preset or a custom preset that allows the package hosts you need.

Refer to Network Policies for policy concepts. Refer to Customize Network Policy for custom preset workflows.

Common Mistakes

The following places commonly mix Hermes plugin installation with other NemoClaw extension paths.

• Do not use skill install for Hermes runtime plugins.
• Do not install Hermes plugins into /sandbox/.openclaw/extensions; that path is for OpenClaw plugins.
• Do not remove /opt/hermes/plugins/nemoclaw; NemoClaw depends on that image-owned plugin for managed Hermes behavior.
• Do not rely on executable plugins under /sandbox/.hermes/plugins; root-separated gateways ignore them and accept image-owned bundled plugins instead.
• Do not put the Dockerfile in a broad directory unless you intend to send that whole directory as the Docker build context.
• Do not rely on .dockerignore to include credential-like paths; NemoClaw excludes those from staged custom build contexts for safety.
• Do not assume OpenShell policy allows Python package downloads during runtime by default.
• Do not install a bundled lazy dependency into /opt/hermes/.venv or declare its target in the generated .env file.

Next Steps

• Review NemoHermes Command Reference for nemohermes onboard --from details.
• Review Customize Network Policy if the plugin needs runtime network egress.
• Review Understand Runtime Changes before changing runtime configuration for a plugin-enabled sandbox.