forked from Zakaria/hermes-agent
Hermes-agent
This commit is contained in:
Zakaria
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# Langfuse Observability Plugin
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This plugin ships bundled with Hermes but is **opt-in** — it only loads when
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you explicitly enable it.
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## Enable
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Pick one:
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```bash
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# Interactive: walks you through credentials + SDK install + enable
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hermes tools # → Langfuse Observability
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# Manual
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pip install langfuse
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hermes plugins enable observability/langfuse
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```
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## Required credentials
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Set these in `~/.hermes/.env` (or via `hermes tools`):
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```bash
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HERMES_LANGFUSE_PUBLIC_KEY=pk-lf-...
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HERMES_LANGFUSE_SECRET_KEY=sk-lf-...
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HERMES_LANGFUSE_BASE_URL=https://cloud.langfuse.com # or your self-hosted URL
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```
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Without the SDK or credentials the hooks no-op silently — the plugin fails
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open.
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## Verify
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```bash
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hermes plugins list # observability/langfuse should show "enabled"
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hermes chat -q "hello" # then check Langfuse for a "Hermes turn" trace
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```
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## Optional tuning
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```bash
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HERMES_LANGFUSE_ENV=production # environment tag
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HERMES_LANGFUSE_RELEASE=v1.0.0 # release tag
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HERMES_LANGFUSE_SAMPLE_RATE=0.5 # sample 50% of traces
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HERMES_LANGFUSE_MAX_CHARS=12000 # max chars per field (default: 12000)
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HERMES_LANGFUSE_DEBUG=true # verbose plugin logging
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```
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## Disable
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```bash
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hermes plugins disable observability/langfuse
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```
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name: langfuse
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version: "1.0.0"
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description: "Optional Langfuse observability for Hermes — traces conversations, LLM calls, and tool usage. Opt-in via `hermes plugins enable observability/langfuse` or `hermes tools → Langfuse Observability`."
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author: NousResearch
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requires_env:
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- HERMES_LANGFUSE_PUBLIC_KEY
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- HERMES_LANGFUSE_SECRET_KEY
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hooks:
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- pre_api_request
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- post_api_request
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- pre_llm_call
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- post_llm_call
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- pre_tool_call
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- post_tool_call
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# NeMo Relay Observability
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Optional Hermes observability plugin that maps Hermes observer hooks to
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NeMo Relay scopes, LLM spans, tool spans, marks, ATOF, and ATIF.
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NeMo Relay is NVIDIA's runtime layer for agent execution boundaries. It does
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not replace Hermes Agent's planner, tools, memory, model provider routing, or
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CLI UX. Instead, this plugin lets Hermes emit NeMo Relay lifecycle events for
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the work Hermes already owns: sessions, turns, provider/API calls, tool calls,
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approval prompts, and delegated subagents.
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With this plugin enabled, Hermes Agent can:
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- Preserve Hermes execution as NeMo Relay scopes, LLM spans, tool spans, and
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mark events.
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- Export raw lifecycle events as Agent Trajectory Observability Format (ATOF)
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JSONL for debugging and offline inspection.
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- Export Agent Trajectory Interchange Format (ATIF) trajectories for replay,
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evaluation, and harness analysis workflows.
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- Correlate parent sessions, delegated subagents, tool calls, and provider
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calls through shared session, turn, and trajectory metadata.
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See the NeMo Relay overview for the broader runtime model:
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https://docs.nvidia.com/nemo/relay/about-nemo-relay/overview
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ATOF is NVIDIA's canonical JSONL event stream representation for NeMo Relay
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lifecycle events. The format is documented in the NeMo Agent Toolkit:
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https://github.com/NVIDIA/NeMo-Agent-Toolkit/blob/develop/packages/nvidia_nat_atif/atof-event-format.md
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ATIF is the trajectory representation produced from those events. NVIDIA and
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Harbor upstreamed ATIF v1.7 support for complex harness workflows, including
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subagent trajectory embedding, trajectory IDs, multi-LLM-call step metadata, and
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deterministic no-LLM orchestration steps:
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https://github.com/harbor-framework/harbor/blob/main/rfcs/0001-trajectory-format.md
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## Enablement
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Enable the plugin before setting export options:
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```bash
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hermes plugins enable observability/nemo_relay
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```
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The `HERMES_NEMO_RELAY_*` environment variables below only configure an
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already-enabled plugin. They do not enable plugin discovery by themselves.
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For isolated test homes, enable the plugin in the same `HERMES_HOME` that the
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agent run will use:
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```bash
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env HERMES_HOME=/tmp/hermes-nemo-relay-test \
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hermes plugins enable observability/nemo_relay
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```
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Runs started with `--ignore_user_config` skip the enabled-plugin state from
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`HERMES_HOME`, so local E2E tests should omit that flag unless the test harness
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loads `observability/nemo_relay` explicitly another way.
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`HERMES_HOME` is the Hermes profile/config home used by both
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`hermes plugins enable ...` and the later `hermes chat ...` run. If unset,
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Hermes uses the user's default home, usually `~/.hermes`. For isolated smoke
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tests, choose any writable temporary directory and use the same value for every
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command in that test:
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```bash
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export HERMES_HOME=/tmp/hermes-nemo-relay-test
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hermes plugins enable observability/nemo_relay
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hermes chat --query 'Reply exactly ok' --provider custom --model qwen3.6:35b
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```
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For source checkouts, make sure the `hermes` command you run is built from the
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checkout that contains this plugin. A globally installed older CLI will not see
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new bundled plugins from your working tree.
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```bash
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uv sync --extra nemo-relay
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uv run hermes plugins enable observability/nemo_relay
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uv run hermes chat --query 'Reply exactly ok' --provider custom --model qwen3.6:35b
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```
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To ship the updated CLI into another environment, build and install a fresh
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wheel from this checkout, then install the official NeMo Relay runtime extra:
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```bash
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uv build --wheel
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python -m pip install --force-reinstall dist/hermes_agent-*.whl
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python -m pip install "nemo-relay==0.3"
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hermes plugins enable observability/nemo_relay
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```
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The plugin fails open when `nemo-relay` is not installed. Install and test it against the official NeMo Relay 0.3 PyPI distribution:
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```bash
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pip install "nemo-relay==0.3"
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```
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## Export Configuration
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The plugin can configure exporters directly from `HERMES_NEMO_RELAY_*`
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environment variables, or delegate exporter setup to a NeMo Relay
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`plugins.toml` component config.
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Use environment variables for local smoke tests, CI jobs, and one-off CLI
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runs. Use `plugins.toml` when you want one NeMo Relay configuration document to
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own observability components such as ATOF, ATIF, OpenTelemetry, and
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OpenInference.
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### Environment Variables
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Useful local export settings after the plugin is enabled:
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```bash
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export HERMES_NEMO_RELAY_ATOF_ENABLED=1
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export HERMES_NEMO_RELAY_ATOF_OUTPUT_DIRECTORY=.nemo-relay/atof
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export HERMES_NEMO_RELAY_ATIF_ENABLED=1
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export HERMES_NEMO_RELAY_ATIF_OUTPUT_DIRECTORY=.nemo-relay/atif
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```
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Optional overrides:
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- `HERMES_NEMO_RELAY_ATOF_FILENAME`
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- `HERMES_NEMO_RELAY_ATOF_MODE` (`append` or `overwrite`)
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- `HERMES_NEMO_RELAY_ATIF_FILENAME_TEMPLATE`
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- `HERMES_NEMO_RELAY_ATIF_AGENT_NAME`
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- `HERMES_NEMO_RELAY_ATIF_AGENT_VERSION`
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- `HERMES_NEMO_RELAY_ATIF_MODEL_NAME`
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- `HERMES_NEMO_RELAY_ATIF_SUBAGENT_EXPORT_MODE` (`embedded` by default; set `all` to also write standalone child files)
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### NeMo Relay Component Config
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To initialize NeMo Relay from a component config, create a `plugins.toml` file
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and point Hermes at it:
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```bash
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export HERMES_NEMO_RELAY_PLUGINS_TOML=.nemo-relay/plugins.toml
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```
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Minimal ATOF and ATIF config:
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```toml
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version = 1
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[[components]]
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kind = "observability"
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enabled = true
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[components.config]
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version = 1
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[components.config.atof]
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enabled = true
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output_directory = ".nemo-relay/atof"
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filename = "events.jsonl"
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mode = "overwrite"
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[components.config.atif]
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enabled = true
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output_directory = ".nemo-relay/atif"
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filename_template = "trajectory-{session_id}.json"
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agent_name = "Hermes Agent"
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agent_version = "local"
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```
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When `HERMES_NEMO_RELAY_PLUGINS_TOML` is set and initializes successfully, NeMo
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Relay owns exporter lifecycle through that config. The direct
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`HERMES_NEMO_RELAY_ATOF_*` fallback setup is skipped. If the same
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`plugins.toml` observability config enables `atif`, the direct
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`HERMES_NEMO_RELAY_ATIF_*` fallback setup is also skipped so Hermes does not
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double-export trajectories on teardown. If `plugins.toml` initialization fails,
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Hermes keeps the direct env-var fallbacks active for that run.
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To enable NeMo Relay managed execution intercepts for provider and tool calls,
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include an adaptive component in the same `plugins.toml`:
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```toml
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[[components]]
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kind = "adaptive"
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enabled = true
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[components.config.tool_parallelism]
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mode = "observe_only"
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```
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When the adaptive component is enabled and the installed NeMo Relay runtime
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exposes `llm.execute(...)` / `tools.execute(...)`, Hermes routes LLM and tool
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execution through those middleware boundaries. The observer hooks still emit
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session, turn, approval, and subagent marks; the plugin skips its manual
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`llm.call` and `tools.call` spans for executions that are already managed by
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NeMo Relay. `tool_parallelism.mode = "observe_only"` keeps tool scheduling
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observational while still wrapping the real execution boundary.
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For the full generic Hermes middleware contract, see
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[`docs/middleware/README.md`](../../../docs/middleware/README.md).
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## Canonical Local Examples
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The observe-only examples in this section use the official `nemo-relay==0.3`
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distribution and a local Ollama model served through the OpenAI-compatible API.
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```bash
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pip install "nemo-relay==0.3"
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export HERMES_HOME=/tmp/hermes-nemo-relay-docs/hermes-home
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mkdir -p "$HERMES_HOME"
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cat > "$HERMES_HOME/config.yaml" <<'YAML'
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model:
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provider: custom
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default: qwen3.6:35b
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base_url: http://127.0.0.1:11434/v1
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api_key: ollama
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plugins:
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enabled:
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- observability/nemo_relay
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delegation:
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max_spawn_depth: 2
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max_concurrent_children: 2
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child_timeout_seconds: 180
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model: qwen3.6:35b
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provider: custom
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base_url: http://127.0.0.1:11434/v1
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api_key: ollama
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YAML
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```
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### Delegated Subagent Tool Call
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This run starts a parent Hermes session, delegates to a child subagent, has the
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child call `terminal`, and writes both ATOF and ATIF.
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```bash
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export HERMES_NEMO_RELAY_ATOF_ENABLED=1
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export HERMES_NEMO_RELAY_ATOF_OUTPUT_DIRECTORY=/tmp/hermes-nemo-relay-docs/subagent/atof
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export HERMES_NEMO_RELAY_ATOF_FILENAME=nested-subagent-atof.jsonl
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export HERMES_NEMO_RELAY_ATOF_MODE=overwrite
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export HERMES_NEMO_RELAY_ATIF_ENABLED=1
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export HERMES_NEMO_RELAY_ATIF_OUTPUT_DIRECTORY=/tmp/hermes-nemo-relay-docs/subagent/atif
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export HERMES_NEMO_RELAY_ATIF_FILENAME_TEMPLATE='nested-subagent-atif-{session_id}.json'
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export HERMES_NEMO_RELAY_ATIF_AGENT_NAME='Hermes Agent E2E'
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export HERMES_NEMO_RELAY_ATIF_AGENT_VERSION=docs-example
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export HERMES_NEMO_RELAY_ATIF_SUBAGENT_EXPORT_MODE=all
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hermes chat \
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--query 'Use delegate_task exactly once. Ask the child subagent to use the terminal tool exactly once to run printf docs_nested_leaf_function. After the child returns, reply with exactly: parent received nested subagent result.' \
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--provider custom \
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--model qwen3.6:35b \
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--toolsets delegation,terminal \
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--max-turns 10 \
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--quiet \
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--accept-hooks
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```
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CLI output:
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```text
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session_id: docs-parent-session
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parent received nested subagent result.
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```
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Sanitized ATOF excerpt:
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```jsonl
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{"kind":"scope","category":"tool","name":"delegate_task","scope_category":"start","metadata":{"session_id":"docs-parent-session","tool_call_id":"call_delegate"},"data":{"goal":"Run the command `printf docs_nested_leaf_function` using the terminal tool.","toolsets":["terminal"]}}
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{"kind":"mark","name":"hermes.subagent.start","metadata":{"parent_session_id":"docs-parent-session","session_id":"docs-child-session","subagent_id":"sa-0-docs","child_role":"leaf"}}
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{"kind":"scope","category":"tool","name":"terminal","scope_category":"end","metadata":{"session_id":"docs-child-session","tool_call_id":"call_terminal","status":"ok"},"data":"{\"output\":\"docs_nested_leaf_function\",\"exit_code\":0,\"error\":null}"}
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{"kind":"scope","category":"tool","name":"delegate_task","scope_category":"end","metadata":{"session_id":"docs-parent-session","tool_call_id":"call_delegate","status":"ok"}}
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```
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Sanitized ATIF excerpt:
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||||
```json
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{
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||||
"schema_version": "ATIF-v1.7",
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"session_id": "docs-parent-session",
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"agent": {"name": "Hermes Agent E2E", "version": "docs-example", "model_name": "qwen3.6:35b"},
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||||
"steps": [
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||||
{
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||||
"source": "agent",
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"tool_calls": [{"function_name": "delegate_task"}],
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"observation": {
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"results": [
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{
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||||
"subagent_trajectory_ref": [{"session_id": "docs-child-session"}],
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"content": "{\"results\":[{\"status\":\"completed\",\"tool_trace\":[{\"tool\":\"terminal\",\"status\":\"ok\"}]}]}"
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||||
}
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||||
]
|
||||
}
|
||||
},
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||||
{"source": "agent", "message": "parent received nested subagent result."}
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||||
],
|
||||
"subagent_trajectories": [
|
||||
{
|
||||
"session_id": "docs-child-session",
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||||
"steps": [
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||||
{
|
||||
"source": "agent",
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||||
"tool_calls": [{"function_name": "terminal", "arguments": {"command": "printf docs_nested_leaf_function"}}],
|
||||
"observation": {"results": [{"content": "{\"output\":\"docs_nested_leaf_function\",\"exit_code\":0,\"error\":null}"}]}
|
||||
}
|
||||
]
|
||||
}
|
||||
]
|
||||
}
|
||||
```
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||||
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||||
### Parallel Tool Calls
|
||||
|
||||
This run asks the model to emit two `read_file` tool calls in the same assistant
|
||||
message. Hermes dispatches the read-only tools as one batch, and NeMo Relay
|
||||
records both tool invocations.
|
||||
|
||||
```bash
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||||
mkdir -p /tmp/hermes-nemo-relay-docs/workdir
|
||||
printf 'docs_parallel_alpha_function\n' > /tmp/hermes-nemo-relay-docs/workdir/alpha.txt
|
||||
printf 'docs_parallel_beta_function\n' > /tmp/hermes-nemo-relay-docs/workdir/beta.txt
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||||
cd /tmp/hermes-nemo-relay-docs/workdir
|
||||
|
||||
export HERMES_NEMO_RELAY_ATOF_ENABLED=1
|
||||
export HERMES_NEMO_RELAY_ATOF_OUTPUT_DIRECTORY=/tmp/hermes-nemo-relay-docs/parallel/atof
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||||
export HERMES_NEMO_RELAY_ATOF_FILENAME=parallel-tools-atof.jsonl
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||||
export HERMES_NEMO_RELAY_ATOF_MODE=overwrite
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||||
export HERMES_NEMO_RELAY_ATIF_ENABLED=1
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||||
export HERMES_NEMO_RELAY_ATIF_OUTPUT_DIRECTORY=/tmp/hermes-nemo-relay-docs/parallel/atif
|
||||
export HERMES_NEMO_RELAY_ATIF_FILENAME_TEMPLATE='parallel-tools-atif-{session_id}.json'
|
||||
export HERMES_NEMO_RELAY_ATIF_AGENT_NAME='Hermes Agent E2E'
|
||||
export HERMES_NEMO_RELAY_ATIF_AGENT_VERSION=docs-example
|
||||
|
||||
hermes chat \
|
||||
--query 'Use exactly two read_file tool calls in the same assistant message. Read alpha.txt and beta.txt. Do not call terminal. After both tool results are available, reply with exactly: parallel tools complete.' \
|
||||
--provider custom \
|
||||
--model qwen3.6:35b \
|
||||
--toolsets file \
|
||||
--max-turns 8 \
|
||||
--quiet \
|
||||
--accept-hooks
|
||||
```
|
||||
|
||||
CLI output:
|
||||
|
||||
```text
|
||||
session_id: docs-parallel-session
|
||||
parallel tools complete.
|
||||
```
|
||||
|
||||
Sanitized ATOF excerpt:
|
||||
|
||||
```jsonl
|
||||
{"kind":"scope","category":"llm","name":"custom","scope_category":"end","data":{"assistant_message":{"tool_calls":[{"id":"call_alpha","name":"read_file","arguments":"{\"path\":\"alpha.txt\"}"},{"id":"call_beta","name":"read_file","arguments":"{\"path\":\"beta.txt\"}"}]},"finish_reason":"tool_calls"}}
|
||||
{"kind":"scope","category":"tool","name":"read_file","scope_category":"start","timestamp":"2026-05-31T00:15:08.956732+00:00","metadata":{"session_id":"docs-parallel-session","tool_call_id":"call_alpha"},"data":{"path":"alpha.txt"}}
|
||||
{"kind":"scope","category":"tool","name":"read_file","scope_category":"start","timestamp":"2026-05-31T00:15:08.956804+00:00","metadata":{"session_id":"docs-parallel-session","tool_call_id":"call_beta"},"data":{"path":"beta.txt"}}
|
||||
{"kind":"scope","category":"tool","name":"read_file","scope_category":"end","metadata":{"session_id":"docs-parallel-session","tool_call_id":"call_beta","status":"ok"},"data":"{\"content\":\" 1|docs_parallel_beta_function\\n\"}"}
|
||||
{"kind":"scope","category":"tool","name":"read_file","scope_category":"end","metadata":{"session_id":"docs-parallel-session","tool_call_id":"call_alpha","status":"ok"},"data":"{\"content\":\" 1|docs_parallel_alpha_function\\n\"}"}
|
||||
```
|
||||
|
||||
Sanitized ATIF excerpt:
|
||||
|
||||
```json
|
||||
{
|
||||
"schema_version": "ATIF-v1.7",
|
||||
"session_id": "docs-parallel-session",
|
||||
"agent": {"name": "Hermes Agent E2E", "version": "docs-example", "model_name": "qwen3.6:35b"},
|
||||
"steps": [
|
||||
{
|
||||
"source": "agent",
|
||||
"tool_calls": [
|
||||
{"tool_call_id": "call_alpha", "function_name": "read_file", "arguments": {"path": "alpha.txt"}},
|
||||
{"tool_call_id": "call_beta", "function_name": "read_file", "arguments": {"path": "beta.txt"}}
|
||||
],
|
||||
"observation": {
|
||||
"results": [
|
||||
{"source_call_id": "call_beta", "content": "{\"content\":\" 1|docs_parallel_beta_function\\n\"}"},
|
||||
{"source_call_id": "call_alpha", "content": "{\"content\":\" 1|docs_parallel_alpha_function\\n\"}"}
|
||||
]
|
||||
}
|
||||
},
|
||||
{"source": "agent", "message": "parallel tools complete."}
|
||||
]
|
||||
}
|
||||
```
|
||||
|
||||
## ATOF Mapping
|
||||
|
||||
The plugin keeps NeMo Relay's native event model:
|
||||
|
||||
- Hermes sessions map to `agent` scopes.
|
||||
- Hermes API request hooks map to `llm` scope start/end events.
|
||||
- Hermes tool hooks map to `tool` scope start/end events.
|
||||
- Turn, approval, subagent, and diagnostic fallback events map to `mark`
|
||||
events.
|
||||
|
||||
For subagent correlation, mark metadata includes parent and child session IDs,
|
||||
subagent IDs, role/status fields when present, and derived
|
||||
`parent_trajectory_id` / `child_trajectory_id` values. This keeps the ATOF
|
||||
stream lossless for later ATIF conversion that can compact subagents into
|
||||
separate trajectories.
|
||||
|
||||
## Adaptive Middleware Example
|
||||
|
||||
The `observability/nemo_relay` plugin uses Hermes execution middleware to hand
|
||||
LLM and tool calls to NeMo Relay managed execution when an adaptive component is
|
||||
enabled.
|
||||
|
||||
Minimal `plugins.toml`:
|
||||
|
||||
```toml
|
||||
version = 1
|
||||
|
||||
[[components]]
|
||||
kind = "adaptive"
|
||||
enabled = true
|
||||
|
||||
[components.config.tool_parallelism]
|
||||
mode = "observe_only"
|
||||
```
|
||||
|
||||
Enable it for Hermes:
|
||||
|
||||
```bash
|
||||
export HERMES_NEMO_RELAY_PLUGINS_TOML=/tmp/hermes-middleware-test/plugins.toml
|
||||
```
|
||||
|
||||
When the adaptive component is enabled and the installed NeMo Relay runtime
|
||||
exposes `llm.execute(...)` and `tools.execute(...)`, Hermes routes execution
|
||||
through these boundaries:
|
||||
|
||||
```text
|
||||
Hermes provider call
|
||||
-> llm_execution middleware
|
||||
-> nemo_relay.llm.execute(...)
|
||||
-> Hermes provider adapter next_call(...)
|
||||
|
||||
Hermes tool call
|
||||
-> tool_execution middleware
|
||||
-> nemo_relay.tools.execute(...)
|
||||
-> Hermes tool dispatcher next_call(...)
|
||||
```
|
||||
|
||||
The plugin still emits observer marks for sessions, turns, approvals, and
|
||||
subagents. When adaptive managed execution is active, it skips manual
|
||||
`llm.call` and `tools.call` observer spans to avoid duplicate LLM/tool events
|
||||
for the same execution.
|
||||
|
||||
### Local Adaptive E2E
|
||||
|
||||
This example enables both NeMo Relay observability export and adaptive execution
|
||||
middleware for a local Hermes run. This path requires a NeMo Relay runtime that
|
||||
supports `[components.config.tool_parallelism]`; the `nemo-relay==0.3`
|
||||
install used by the earlier observability-only examples does not support this
|
||||
adaptive config.
|
||||
|
||||
```bash
|
||||
export HERMES_HOME=/tmp/hermes-middleware-test/hermes-home
|
||||
mkdir -p "$HERMES_HOME" /tmp/hermes-middleware-test/nemo-relay
|
||||
|
||||
cat > "$HERMES_HOME/config.yaml" <<'YAML'
|
||||
model:
|
||||
provider: custom
|
||||
default: qwen3.6:35b
|
||||
base_url: http://127.0.0.1:11434/v1
|
||||
api_key: ollama
|
||||
plugins:
|
||||
enabled:
|
||||
- observability/nemo_relay
|
||||
YAML
|
||||
|
||||
cat > /tmp/hermes-middleware-test/nemo-relay/plugins.toml <<'TOML'
|
||||
version = 1
|
||||
|
||||
[[components]]
|
||||
kind = "observability"
|
||||
enabled = true
|
||||
|
||||
[components.config]
|
||||
version = 1
|
||||
|
||||
[components.config.atof]
|
||||
enabled = true
|
||||
output_directory = "/tmp/hermes-middleware-test/atof"
|
||||
filename = "middleware-events.jsonl"
|
||||
mode = "overwrite"
|
||||
|
||||
[components.config.atif]
|
||||
enabled = true
|
||||
output_directory = "/tmp/hermes-middleware-test/atif"
|
||||
filename_template = "middleware-trajectory-{session_id}.json"
|
||||
agent_name = "Hermes Middleware E2E"
|
||||
agent_version = "local"
|
||||
|
||||
[[components]]
|
||||
kind = "adaptive"
|
||||
enabled = true
|
||||
|
||||
[components.config.tool_parallelism]
|
||||
mode = "observe_only"
|
||||
TOML
|
||||
|
||||
export HERMES_NEMO_RELAY_PLUGINS_TOML=/tmp/hermes-middleware-test/nemo-relay/plugins.toml
|
||||
|
||||
hermes chat \
|
||||
--query 'Use the terminal tool exactly once to run printf middleware_execution_ok. Then reply with exactly the command output.' \
|
||||
--provider custom \
|
||||
--model qwen3.6:35b \
|
||||
--toolsets terminal \
|
||||
--max-turns 4 \
|
||||
--quiet \
|
||||
--accept-hooks
|
||||
```
|
||||
|
||||
Expected CLI output:
|
||||
|
||||
```text
|
||||
session_id: middleware-demo-session
|
||||
middleware_execution_ok
|
||||
```
|
||||
|
||||
Expected ATOF shape:
|
||||
|
||||
```jsonl
|
||||
{"kind":"scope","category":"llm","name":"custom","scope_category":"start","metadata":{"session_id":"middleware-demo-session"},"data":{"mode":"observe_only"}}
|
||||
{"kind":"scope","category":"tool","name":"terminal","scope_category":"start","metadata":{"session_id":"middleware-demo-session","tool_call_id":"call_terminal"},"data":{"mode":"observe_only"}}
|
||||
{"kind":"scope","category":"tool","name":"terminal","scope_category":"end","metadata":{"session_id":"middleware-demo-session","tool_call_id":"call_terminal","status":"ok"},"data":"{\"output\":\"middleware_execution_ok\",\"exit_code\":0,\"error\":null}"}
|
||||
```
|
||||
|
||||
Expected ATIF shape:
|
||||
|
||||
```json
|
||||
{
|
||||
"schema_version": "ATIF-v1.7",
|
||||
"session_id": "middleware-demo-session",
|
||||
"agent": {
|
||||
"name": "Hermes Middleware E2E",
|
||||
"version": "local",
|
||||
"model_name": "qwen3.6:35b"
|
||||
},
|
||||
"steps": [
|
||||
{
|
||||
"source": "agent",
|
||||
"tool_calls": [
|
||||
{
|
||||
"function_name": "terminal",
|
||||
"arguments": {"command": "printf middleware_execution_ok"}
|
||||
}
|
||||
],
|
||||
"observation": {
|
||||
"results": [
|
||||
{
|
||||
"source_call_id": "call_terminal",
|
||||
"content": "{\"output\":\"middleware_execution_ok\",\"exit_code\":0,\"error\":null}"
|
||||
}
|
||||
]
|
||||
}
|
||||
},
|
||||
{
|
||||
"source": "agent",
|
||||
"message": "middleware_execution_ok"
|
||||
}
|
||||
]
|
||||
}
|
||||
```
|
||||
@@ -0,0 +1,962 @@
|
||||
"""nemo_relay — optional Hermes plugin for NeMo Relay observability."""
|
||||
|
||||
from __future__ import annotations
|
||||
|
||||
import asyncio
|
||||
import inspect
|
||||
import json
|
||||
import logging
|
||||
import os
|
||||
import threading
|
||||
import tomllib
|
||||
from collections.abc import Callable
|
||||
from dataclasses import dataclass, field
|
||||
from pathlib import Path
|
||||
from typing import Any, Optional
|
||||
|
||||
logger = logging.getLogger(__name__)
|
||||
|
||||
_INIT_FAILED = object()
|
||||
_LOCK = threading.RLock()
|
||||
_RUNTIME: "_Runtime | object | None" = None
|
||||
|
||||
|
||||
@dataclass
|
||||
class _SessionState:
|
||||
session_id: str
|
||||
handle: Any = None
|
||||
atif_exporter: Any = None
|
||||
atif_subscriber_name: str = ""
|
||||
is_embedded_subagent: bool = False
|
||||
parent_session_id: str = ""
|
||||
llm_spans: dict[str, Any] = field(default_factory=dict)
|
||||
tool_spans: dict[str, Any] = field(default_factory=dict)
|
||||
|
||||
|
||||
@dataclass
|
||||
class _SubagentParent:
|
||||
parent_session_id: str
|
||||
parent_handle: Any
|
||||
metadata: dict[str, Any]
|
||||
|
||||
|
||||
@dataclass
|
||||
class _Settings:
|
||||
plugins_toml_path: str = ""
|
||||
plugins_config: dict[str, Any] | None = None
|
||||
adaptive_enabled: bool = False
|
||||
adaptive_mode: str = "observe_only"
|
||||
atof_enabled: bool = False
|
||||
atof_output_directory: str = ""
|
||||
atof_filename: str = "hermes-atof.jsonl"
|
||||
atof_mode: str = "append"
|
||||
atif_enabled: bool = False
|
||||
atif_output_directory: str = ""
|
||||
atif_filename_template: str = "hermes-atif-{session_id}.json"
|
||||
atif_subagent_export_mode: str = "embedded"
|
||||
atif_agent_name: str = "Hermes Agent"
|
||||
atif_agent_version: str = "unknown"
|
||||
atif_model_name: str = "unknown"
|
||||
|
||||
|
||||
class _Runtime:
|
||||
def __init__(self, nemo_relay: Any, settings: _Settings) -> None:
|
||||
self.nemo_relay = nemo_relay
|
||||
self.settings = settings
|
||||
self.sessions: dict[str, _SessionState] = {}
|
||||
self.subagent_parents: dict[str, _SubagentParent] = {}
|
||||
self.atof_exporter: Any = None
|
||||
self._atof_subscriber_name = "hermes.nemo_relay.atof"
|
||||
self._plugin_config_initialized = self._configure_plugins_toml()
|
||||
self._plugin_config_needs_reinit = False
|
||||
if not self._plugin_config_initialized:
|
||||
self._activate_direct_fallbacks()
|
||||
|
||||
def _configure_plugins_toml(self) -> bool:
|
||||
if not self.settings.plugins_config:
|
||||
return False
|
||||
plugin_mod = getattr(self.nemo_relay, "plugin", None)
|
||||
initialize = getattr(plugin_mod, "initialize", None)
|
||||
if not callable(initialize):
|
||||
return False
|
||||
try:
|
||||
self._ensure_plugin_config_output_dirs(self.settings.plugins_config)
|
||||
_resolve_awaitable(initialize(self.settings.plugins_config))
|
||||
return True
|
||||
except Exception as exc:
|
||||
logger.debug("NeMo Relay plugins.toml init failed: %s", exc, exc_info=True)
|
||||
return False
|
||||
|
||||
def _clear_plugins_toml(self) -> None:
|
||||
if not self._plugin_config_initialized:
|
||||
return
|
||||
plugin_mod = getattr(self.nemo_relay, "plugin", None)
|
||||
clear = getattr(plugin_mod, "clear", None)
|
||||
if not callable(clear):
|
||||
return
|
||||
try:
|
||||
_resolve_awaitable(clear())
|
||||
finally:
|
||||
self._plugin_config_initialized = False
|
||||
self._plugin_config_needs_reinit = bool(self.settings.plugins_config)
|
||||
|
||||
def _activate_direct_fallbacks(self) -> None:
|
||||
self._plugin_config_needs_reinit = False
|
||||
self._configure_atof()
|
||||
|
||||
def _maybe_reinitialize_plugins_toml(self) -> None:
|
||||
if not self._plugin_config_needs_reinit or self._plugin_config_initialized:
|
||||
return
|
||||
self._plugin_config_initialized = self._configure_plugins_toml()
|
||||
if not self._plugin_config_initialized:
|
||||
self._activate_direct_fallbacks()
|
||||
return
|
||||
self._clear_atof()
|
||||
self._plugin_config_needs_reinit = False
|
||||
|
||||
def _plugins_toml_owns_exporter(self, exporter_name: str) -> bool:
|
||||
return self._plugin_config_initialized and _observability_exporter_enabled(
|
||||
self.settings.plugins_config,
|
||||
exporter_name,
|
||||
)
|
||||
|
||||
def _ensure_plugin_config_output_dirs(self, config: dict[str, Any]) -> None:
|
||||
for component in config.get("components", []):
|
||||
if not isinstance(component, dict):
|
||||
continue
|
||||
if component.get("kind") != "observability":
|
||||
continue
|
||||
if component.get("enabled") is False:
|
||||
continue
|
||||
component_config = component.get("config")
|
||||
if not isinstance(component_config, dict):
|
||||
continue
|
||||
for exporter_name in ("atof", "atif"):
|
||||
exporter_config = component_config.get(exporter_name)
|
||||
if not isinstance(exporter_config, dict):
|
||||
continue
|
||||
output_directory = exporter_config.get("output_directory")
|
||||
if isinstance(output_directory, str) and output_directory.strip():
|
||||
Path(output_directory).mkdir(parents=True, exist_ok=True)
|
||||
|
||||
def _configure_atof(self) -> None:
|
||||
if not self.settings.atof_enabled or self.atof_exporter is not None:
|
||||
return
|
||||
config = self.nemo_relay.AtofExporterConfig()
|
||||
if self.settings.atof_output_directory:
|
||||
Path(self.settings.atof_output_directory).mkdir(parents=True, exist_ok=True)
|
||||
config.output_directory = self.settings.atof_output_directory
|
||||
config.filename = self.settings.atof_filename
|
||||
if self.settings.atof_mode.lower() == "overwrite":
|
||||
config.mode = self.nemo_relay.AtofExporterMode.Overwrite
|
||||
else:
|
||||
config.mode = self.nemo_relay.AtofExporterMode.Append
|
||||
self.atof_exporter = self.nemo_relay.AtofExporter(config)
|
||||
self.atof_exporter.register(self._atof_subscriber_name)
|
||||
|
||||
def _clear_atof(self) -> None:
|
||||
if self.atof_exporter is None:
|
||||
return
|
||||
deregister = getattr(self.atof_exporter, "deregister", None)
|
||||
if callable(deregister):
|
||||
try:
|
||||
deregister(self._atof_subscriber_name)
|
||||
except Exception:
|
||||
logger.debug("NeMo Relay ATOF deregister failed", exc_info=True)
|
||||
self.atof_exporter = None
|
||||
|
||||
def ensure_session(self, kwargs: dict[str, Any]) -> _SessionState:
|
||||
self._maybe_reinitialize_plugins_toml()
|
||||
session_id = _session_id(kwargs)
|
||||
state = self.sessions.get(session_id)
|
||||
if state is not None:
|
||||
return state
|
||||
|
||||
state = _SessionState(session_id=session_id)
|
||||
if self.settings.atif_enabled and not self._plugins_toml_owns_exporter("atif"):
|
||||
state.atif_exporter = self.nemo_relay.AtifExporter(
|
||||
session_id,
|
||||
self.settings.atif_agent_name,
|
||||
self.settings.atif_agent_version,
|
||||
model_name=str(kwargs.get("model") or self.settings.atif_model_name),
|
||||
extra={"source": "hermes-agent", "plugin": "observability/nemo_relay"},
|
||||
)
|
||||
state.atif_subscriber_name = f"hermes.nemo_relay.atif.{session_id}"
|
||||
state.atif_exporter.register(state.atif_subscriber_name)
|
||||
|
||||
subagent_parent = self.subagent_parents.get(session_id)
|
||||
metadata = _metadata(kwargs)
|
||||
parent_handle = None
|
||||
if subagent_parent is not None:
|
||||
parent_handle = subagent_parent.parent_handle
|
||||
metadata = {**metadata, **subagent_parent.metadata}
|
||||
state.is_embedded_subagent = True
|
||||
state.parent_session_id = subagent_parent.parent_session_id
|
||||
|
||||
state.handle = self.nemo_relay.scope.push(
|
||||
f"hermes-session-{session_id}",
|
||||
self.nemo_relay.ScopeType.Agent,
|
||||
handle=parent_handle,
|
||||
data={"session_id": session_id},
|
||||
metadata=metadata,
|
||||
)
|
||||
self.sessions[session_id] = state
|
||||
return state
|
||||
|
||||
def export_atif(self, state: _SessionState) -> None:
|
||||
if not self.settings.atif_enabled or state.atif_exporter is None:
|
||||
return
|
||||
if state.is_embedded_subagent and self.settings.atif_subagent_export_mode != "all":
|
||||
return
|
||||
output_dir = self.settings.atif_output_directory
|
||||
if not output_dir:
|
||||
return
|
||||
Path(output_dir).mkdir(parents=True, exist_ok=True)
|
||||
filename = self.settings.atif_filename_template.format(session_id=state.session_id)
|
||||
Path(output_dir, filename).write_text(state.atif_exporter.export_json(), encoding="utf-8")
|
||||
|
||||
def close_session(self, kwargs: dict[str, Any]) -> None:
|
||||
session_id = _session_id(kwargs)
|
||||
self.subagent_parents.pop(session_id, None)
|
||||
state = self.sessions.pop(session_id, None)
|
||||
if state is None:
|
||||
return
|
||||
if state.handle is not None:
|
||||
try:
|
||||
self.nemo_relay.scope.pop(state.handle, output=_jsonable(kwargs))
|
||||
except Exception:
|
||||
logger.debug("NeMo Relay session pop failed", exc_info=True)
|
||||
self.export_atif(state)
|
||||
if state.atif_exporter is not None and state.atif_subscriber_name:
|
||||
try:
|
||||
state.atif_exporter.deregister(state.atif_subscriber_name)
|
||||
except Exception:
|
||||
logger.debug("NeMo Relay ATIF deregister failed", exc_info=True)
|
||||
if self._plugin_config_initialized and not self.sessions:
|
||||
try:
|
||||
self._clear_plugins_toml()
|
||||
except Exception:
|
||||
logger.debug("NeMo Relay plugins.toml clear failed", exc_info=True)
|
||||
elif self.settings.plugins_config and not self.sessions:
|
||||
self._plugin_config_needs_reinit = True
|
||||
|
||||
def mark(self, name: str, kwargs: dict[str, Any]) -> None:
|
||||
state = self.ensure_session(kwargs)
|
||||
self.nemo_relay.scope.event(
|
||||
name,
|
||||
handle=state.handle,
|
||||
data=_jsonable(kwargs),
|
||||
metadata=_metadata(kwargs),
|
||||
)
|
||||
|
||||
def mark_subagent_start(self, kwargs: dict[str, Any]) -> None:
|
||||
parent_state = self.ensure_session(kwargs)
|
||||
metadata = _metadata(kwargs)
|
||||
child_session_id = _child_session_id(kwargs)
|
||||
if child_session_id:
|
||||
self.subagent_parents[child_session_id] = _SubagentParent(
|
||||
parent_session_id=parent_state.session_id,
|
||||
parent_handle=parent_state.handle,
|
||||
metadata=_subagent_child_metadata(kwargs, metadata),
|
||||
)
|
||||
self.nemo_relay.scope.event(
|
||||
"hermes.subagent.start",
|
||||
handle=parent_state.handle,
|
||||
data=_jsonable(kwargs),
|
||||
metadata=metadata,
|
||||
)
|
||||
|
||||
def mark_subagent_stop(self, kwargs: dict[str, Any]) -> None:
|
||||
child_session_id = _child_session_id(kwargs)
|
||||
if child_session_id:
|
||||
self.subagent_parents.pop(child_session_id, None)
|
||||
self.mark("hermes.subagent.stop", kwargs)
|
||||
|
||||
def managed_llm_enabled(self) -> bool:
|
||||
return (
|
||||
self.settings.adaptive_enabled
|
||||
and callable(getattr(getattr(self.nemo_relay, "llm", None), "execute", None))
|
||||
and callable(getattr(self.nemo_relay, "LLMRequest", None))
|
||||
)
|
||||
|
||||
def managed_tool_enabled(self) -> bool:
|
||||
return (
|
||||
self.settings.adaptive_enabled
|
||||
and callable(getattr(getattr(self.nemo_relay, "tools", None), "execute", None))
|
||||
)
|
||||
|
||||
def _run_managed_with_downstream_preservation(
|
||||
self,
|
||||
next_call: Callable[[Any], Any],
|
||||
normalize_payload: Callable[[Any], Any],
|
||||
shape_response: Callable[[Any], Any],
|
||||
make_managed_execute: Callable[[Callable[[Any], Any]], Any],
|
||||
) -> Any:
|
||||
# NeMo Relay's native managed execution may wrap a failing callback as an
|
||||
# internal runtime error, hiding the real downstream provider/tool
|
||||
# exception. Capture the original here and re-raise it after managed
|
||||
# execution so Hermes retry classification still sees it. The LLM and tool
|
||||
# paths share this scaffolding; they differ only in payload normalization,
|
||||
# response shaping, and the Relay call itself.
|
||||
raw_response: dict[str, Any] = {"set": False, "value": None}
|
||||
callback_error: Exception | None = None
|
||||
downstream_error: BaseException | None = None
|
||||
|
||||
def _impl(next_payload: Any) -> Any:
|
||||
nonlocal callback_error, downstream_error
|
||||
try:
|
||||
raw = next_call(normalize_payload(next_payload))
|
||||
except Exception as exc:
|
||||
callback_error = exc
|
||||
downstream_error = _original_downstream_error(exc)
|
||||
raise
|
||||
raw_response["set"] = True
|
||||
raw_response["value"] = raw
|
||||
return shape_response(raw)
|
||||
|
||||
try:
|
||||
managed_result = _resolve_awaitable(make_managed_execute(_impl))
|
||||
except Exception as exc:
|
||||
if downstream_error is not None and _is_relay_wrapped_callback_error(exc, callback_error):
|
||||
raise downstream_error
|
||||
raise
|
||||
return raw_response["value"] if raw_response["set"] else managed_result
|
||||
|
||||
def execute_llm(self, kwargs: dict[str, Any]) -> Any:
|
||||
state = self.ensure_session(kwargs)
|
||||
request_body = _jsonable(kwargs.get("request") or {})
|
||||
request = self.nemo_relay.LLMRequest({}, request_body)
|
||||
next_call = kwargs.get("next_call")
|
||||
if not callable(next_call):
|
||||
return request_body
|
||||
|
||||
def _normalize(next_request: Any) -> Any:
|
||||
next_body = getattr(next_request, "content", next_request)
|
||||
return next_body if isinstance(next_body, dict) else request_body
|
||||
|
||||
def _make_managed(impl: Callable[[Any], Any]) -> Any:
|
||||
async def _managed_execute() -> Any:
|
||||
result = self.nemo_relay.llm.execute(
|
||||
str(kwargs.get("provider") or "llm"),
|
||||
request,
|
||||
impl,
|
||||
handle=state.handle,
|
||||
data=_jsonable(
|
||||
{
|
||||
"turn_id": kwargs.get("turn_id"),
|
||||
"api_request_id": kwargs.get("api_request_id"),
|
||||
"api_call_count": kwargs.get("api_call_count"),
|
||||
"mode": self.settings.adaptive_mode,
|
||||
}
|
||||
),
|
||||
metadata=_metadata(kwargs),
|
||||
model_name=str(kwargs.get("model") or ""),
|
||||
)
|
||||
if inspect.isawaitable(result):
|
||||
return await result
|
||||
return result
|
||||
|
||||
return _managed_execute()
|
||||
|
||||
return self._run_managed_with_downstream_preservation(
|
||||
next_call, _normalize, _llm_response_payload, _make_managed
|
||||
)
|
||||
|
||||
def execute_tool(self, kwargs: dict[str, Any]) -> Any:
|
||||
state = self.ensure_session(kwargs)
|
||||
tool_name = str(kwargs.get("tool_name") or "tool")
|
||||
args = _jsonable(kwargs.get("args") or {})
|
||||
next_call = kwargs.get("next_call")
|
||||
if not callable(next_call):
|
||||
return args
|
||||
|
||||
def _normalize(next_args: Any) -> Any:
|
||||
return next_args if isinstance(next_args, dict) else args
|
||||
|
||||
def _make_managed(impl: Callable[[Any], Any]) -> Any:
|
||||
async def _managed_execute() -> Any:
|
||||
result = self.nemo_relay.tools.execute(
|
||||
tool_name,
|
||||
args,
|
||||
impl,
|
||||
handle=state.handle,
|
||||
data=_jsonable(
|
||||
{
|
||||
"turn_id": kwargs.get("turn_id"),
|
||||
"api_request_id": kwargs.get("api_request_id"),
|
||||
"tool_call_id": kwargs.get("tool_call_id"),
|
||||
"mode": self.settings.adaptive_mode,
|
||||
}
|
||||
),
|
||||
metadata=_metadata(kwargs),
|
||||
)
|
||||
if inspect.isawaitable(result):
|
||||
return await result
|
||||
return result
|
||||
|
||||
return _managed_execute()
|
||||
|
||||
return self._run_managed_with_downstream_preservation(
|
||||
next_call, _normalize, _jsonable, _make_managed
|
||||
)
|
||||
|
||||
|
||||
def register(ctx) -> None:
|
||||
ctx.register_hook("on_session_start", on_session_start)
|
||||
ctx.register_hook("on_session_end", on_session_end)
|
||||
ctx.register_hook("on_session_finalize", on_session_finalize)
|
||||
ctx.register_hook("on_session_reset", on_session_reset)
|
||||
ctx.register_hook("pre_llm_call", on_pre_llm_call)
|
||||
ctx.register_hook("post_llm_call", on_post_llm_call)
|
||||
ctx.register_hook("pre_api_request", on_pre_api_request)
|
||||
ctx.register_hook("post_api_request", on_post_api_request)
|
||||
ctx.register_hook("api_request_error", on_api_request_error)
|
||||
ctx.register_hook("pre_tool_call", on_pre_tool_call)
|
||||
ctx.register_hook("post_tool_call", on_post_tool_call)
|
||||
ctx.register_hook("pre_approval_request", on_pre_approval_request)
|
||||
ctx.register_hook("post_approval_response", on_post_approval_response)
|
||||
ctx.register_hook("subagent_start", on_subagent_start)
|
||||
ctx.register_hook("subagent_stop", on_subagent_stop)
|
||||
ctx.register_middleware("llm_execution", on_llm_execution_middleware)
|
||||
ctx.register_middleware("tool_execution", on_tool_execution_middleware)
|
||||
|
||||
|
||||
def on_session_start(**kwargs: Any) -> None:
|
||||
runtime = _get_runtime()
|
||||
if runtime is not None:
|
||||
_safe(lambda: runtime.ensure_session(kwargs))
|
||||
|
||||
|
||||
def on_session_end(**kwargs: Any) -> None:
|
||||
runtime = _get_runtime()
|
||||
if runtime is not None:
|
||||
_safe(lambda: (runtime.mark("hermes.session.end", kwargs), runtime.export_atif(runtime.ensure_session(kwargs))))
|
||||
|
||||
|
||||
def on_session_finalize(**kwargs: Any) -> None:
|
||||
runtime = _get_runtime()
|
||||
if runtime is not None:
|
||||
_safe(lambda: runtime.close_session(kwargs))
|
||||
|
||||
|
||||
def on_session_reset(**kwargs: Any) -> None:
|
||||
runtime = _get_runtime()
|
||||
if runtime is not None:
|
||||
_safe(lambda: runtime.close_session(kwargs))
|
||||
|
||||
|
||||
def on_pre_llm_call(**kwargs: Any) -> None:
|
||||
runtime = _get_runtime()
|
||||
if runtime is not None:
|
||||
_safe(lambda: runtime.mark("hermes.turn.start", kwargs))
|
||||
|
||||
|
||||
def on_post_llm_call(**kwargs: Any) -> None:
|
||||
runtime = _get_runtime()
|
||||
if runtime is not None:
|
||||
_safe(lambda: runtime.mark("hermes.turn.end", kwargs))
|
||||
|
||||
|
||||
def on_pre_api_request(**kwargs: Any) -> None:
|
||||
runtime = _get_runtime()
|
||||
if runtime is None:
|
||||
return
|
||||
if runtime.managed_llm_enabled():
|
||||
return
|
||||
|
||||
def _record() -> None:
|
||||
state = runtime.ensure_session(kwargs)
|
||||
request_payload = kwargs.get("request")
|
||||
request_body = request_payload.get("body") if isinstance(request_payload, dict) else {}
|
||||
request = runtime.nemo_relay.LLMRequest({}, _jsonable(request_body))
|
||||
span = runtime.nemo_relay.llm.call(
|
||||
str(kwargs.get("provider") or "llm"),
|
||||
request,
|
||||
handle=state.handle,
|
||||
data=_jsonable({"turn_id": kwargs.get("turn_id"), "api_request_id": kwargs.get("api_request_id")}),
|
||||
metadata=_metadata(kwargs),
|
||||
model_name=str(kwargs.get("model") or ""),
|
||||
)
|
||||
state.llm_spans[_api_key(kwargs)] = span
|
||||
|
||||
_safe(_record)
|
||||
|
||||
|
||||
def on_post_api_request(**kwargs: Any) -> None:
|
||||
runtime = _get_runtime()
|
||||
if runtime is None:
|
||||
return
|
||||
if runtime.managed_llm_enabled():
|
||||
return
|
||||
|
||||
def _record() -> None:
|
||||
state = runtime.ensure_session(kwargs)
|
||||
span = state.llm_spans.pop(_api_key(kwargs), None)
|
||||
if span is None:
|
||||
runtime.mark("hermes.api.response.unmatched", kwargs)
|
||||
return
|
||||
runtime.nemo_relay.llm.call_end(
|
||||
span,
|
||||
_jsonable(kwargs.get("response") or {}),
|
||||
data=_jsonable({"usage": kwargs.get("usage"), "finish_reason": kwargs.get("finish_reason")}),
|
||||
metadata=_metadata(kwargs),
|
||||
)
|
||||
|
||||
_safe(_record)
|
||||
|
||||
|
||||
def on_api_request_error(**kwargs: Any) -> None:
|
||||
runtime = _get_runtime()
|
||||
if runtime is None:
|
||||
return
|
||||
if runtime.managed_llm_enabled():
|
||||
return
|
||||
|
||||
def _record() -> None:
|
||||
state = runtime.ensure_session(kwargs)
|
||||
span = state.llm_spans.pop(_api_key(kwargs), None)
|
||||
if span is None:
|
||||
runtime.mark("hermes.api.error", kwargs)
|
||||
return
|
||||
runtime.nemo_relay.llm.call_end(
|
||||
span,
|
||||
{"error": _jsonable(kwargs.get("error") or {})},
|
||||
data=_jsonable(kwargs),
|
||||
metadata=_metadata(kwargs),
|
||||
)
|
||||
|
||||
_safe(_record)
|
||||
|
||||
|
||||
def on_pre_tool_call(**kwargs: Any) -> None:
|
||||
runtime = _get_runtime()
|
||||
if runtime is None:
|
||||
return
|
||||
if runtime.managed_tool_enabled():
|
||||
return
|
||||
|
||||
def _record() -> None:
|
||||
state = runtime.ensure_session(kwargs)
|
||||
span = runtime.nemo_relay.tools.call(
|
||||
str(kwargs.get("tool_name") or "tool"),
|
||||
_jsonable(kwargs.get("args") or {}),
|
||||
handle=state.handle,
|
||||
data=_jsonable({"turn_id": kwargs.get("turn_id"), "api_request_id": kwargs.get("api_request_id")}),
|
||||
metadata=_metadata(kwargs),
|
||||
tool_call_id=str(kwargs.get("tool_call_id") or ""),
|
||||
)
|
||||
state.tool_spans[_tool_key(kwargs)] = span
|
||||
|
||||
_safe(_record)
|
||||
|
||||
|
||||
def on_post_tool_call(**kwargs: Any) -> None:
|
||||
runtime = _get_runtime()
|
||||
if runtime is None:
|
||||
return
|
||||
if runtime.managed_tool_enabled():
|
||||
return
|
||||
|
||||
def _record() -> None:
|
||||
state = runtime.ensure_session(kwargs)
|
||||
span = state.tool_spans.pop(_tool_key(kwargs), None)
|
||||
if span is None:
|
||||
runtime.mark("hermes.tool.response.unmatched", kwargs)
|
||||
return
|
||||
runtime.nemo_relay.tools.call_end(
|
||||
span,
|
||||
_jsonable(kwargs.get("result")),
|
||||
data=_jsonable({"status": kwargs.get("status"), "duration_ms": kwargs.get("duration_ms")}),
|
||||
metadata=_metadata(kwargs),
|
||||
)
|
||||
|
||||
_safe(_record)
|
||||
|
||||
|
||||
def on_pre_approval_request(**kwargs: Any) -> None:
|
||||
runtime = _get_runtime()
|
||||
if runtime is not None:
|
||||
_safe(lambda: runtime.mark("hermes.approval.request", kwargs))
|
||||
|
||||
|
||||
def on_post_approval_response(**kwargs: Any) -> None:
|
||||
runtime = _get_runtime()
|
||||
if runtime is not None:
|
||||
_safe(lambda: runtime.mark("hermes.approval.response", kwargs))
|
||||
|
||||
|
||||
def on_subagent_start(**kwargs: Any) -> None:
|
||||
runtime = _get_runtime()
|
||||
if runtime is not None:
|
||||
_safe(lambda: runtime.mark_subagent_start(kwargs))
|
||||
|
||||
|
||||
def on_subagent_stop(**kwargs: Any) -> None:
|
||||
runtime = _get_runtime()
|
||||
if runtime is not None:
|
||||
_safe(lambda: runtime.mark_subagent_stop(kwargs))
|
||||
|
||||
|
||||
def on_llm_execution_middleware(**kwargs: Any) -> Any:
|
||||
runtime = _get_runtime()
|
||||
next_call = kwargs.get("next_call")
|
||||
request = kwargs.get("request") or {}
|
||||
if runtime is not None and runtime.managed_llm_enabled():
|
||||
return runtime.execute_llm(kwargs)
|
||||
if callable(next_call):
|
||||
return next_call(request)
|
||||
return request
|
||||
|
||||
|
||||
def on_tool_execution_middleware(**kwargs: Any) -> Any:
|
||||
runtime = _get_runtime()
|
||||
next_call = kwargs.get("next_call")
|
||||
args = kwargs.get("args") or {}
|
||||
if runtime is not None and runtime.managed_tool_enabled():
|
||||
return runtime.execute_tool(kwargs)
|
||||
if callable(next_call):
|
||||
return next_call(args)
|
||||
return args
|
||||
|
||||
|
||||
def _get_runtime() -> Optional[_Runtime]:
|
||||
global _RUNTIME
|
||||
with _LOCK:
|
||||
if _RUNTIME is _INIT_FAILED:
|
||||
return None
|
||||
if isinstance(_RUNTIME, _Runtime):
|
||||
return _RUNTIME
|
||||
try:
|
||||
import nemo_relay as nemo_runtime
|
||||
except Exception as exc:
|
||||
logger.debug("NeMo Relay plugin disabled: import failed: %s", exc)
|
||||
_RUNTIME = _INIT_FAILED
|
||||
return None
|
||||
try:
|
||||
_RUNTIME = _Runtime(nemo_relay=nemo_runtime, settings=_load_settings())
|
||||
except Exception as exc:
|
||||
logger.debug("NeMo Relay plugin disabled: init failed: %s", exc, exc_info=True)
|
||||
_RUNTIME = _INIT_FAILED
|
||||
return None
|
||||
return _RUNTIME
|
||||
|
||||
|
||||
def _load_settings() -> _Settings:
|
||||
plugins_toml_path = _env("HERMES_NEMO_RELAY_PLUGINS_TOML")
|
||||
plugins_config = _load_plugins_config(plugins_toml_path)
|
||||
adaptive_config = _enabled_component_config(plugins_config, "adaptive")
|
||||
return _Settings(
|
||||
plugins_toml_path=plugins_toml_path,
|
||||
plugins_config=plugins_config,
|
||||
adaptive_enabled=adaptive_config is not None,
|
||||
adaptive_mode=_adaptive_mode(adaptive_config),
|
||||
atof_enabled=_env_bool("HERMES_NEMO_RELAY_ATOF_ENABLED"),
|
||||
atof_output_directory=_env("HERMES_NEMO_RELAY_ATOF_OUTPUT_DIRECTORY"),
|
||||
atof_filename=_env("HERMES_NEMO_RELAY_ATOF_FILENAME") or "hermes-atof.jsonl",
|
||||
atof_mode=_env("HERMES_NEMO_RELAY_ATOF_MODE") or "append",
|
||||
atif_enabled=_env_bool("HERMES_NEMO_RELAY_ATIF_ENABLED"),
|
||||
atif_output_directory=_env("HERMES_NEMO_RELAY_ATIF_OUTPUT_DIRECTORY"),
|
||||
atif_filename_template=_env("HERMES_NEMO_RELAY_ATIF_FILENAME_TEMPLATE") or "hermes-atif-{session_id}.json",
|
||||
atif_subagent_export_mode=_atif_subagent_export_mode(),
|
||||
atif_agent_name=_env("HERMES_NEMO_RELAY_ATIF_AGENT_NAME") or "Hermes Agent",
|
||||
atif_agent_version=_env("HERMES_NEMO_RELAY_ATIF_AGENT_VERSION") or "unknown",
|
||||
atif_model_name=_env("HERMES_NEMO_RELAY_ATIF_MODEL_NAME") or "unknown",
|
||||
)
|
||||
|
||||
|
||||
def _load_plugins_config(path: str) -> dict[str, Any] | None:
|
||||
if not path:
|
||||
return None
|
||||
try:
|
||||
return tomllib.loads(Path(path).read_text(encoding="utf-8"))
|
||||
except Exception as exc:
|
||||
logger.debug("NeMo Relay plugins.toml load failed: %s", exc, exc_info=True)
|
||||
return None
|
||||
|
||||
|
||||
def _enabled_component_config(
|
||||
plugins_config: dict[str, Any] | None,
|
||||
kind: str,
|
||||
) -> dict[str, Any] | None:
|
||||
if not isinstance(plugins_config, dict):
|
||||
return None
|
||||
components = plugins_config.get("components")
|
||||
if not isinstance(components, list):
|
||||
return None
|
||||
for component in components:
|
||||
if not isinstance(component, dict):
|
||||
continue
|
||||
if component.get("kind") != kind or not component.get("enabled", True):
|
||||
continue
|
||||
config = component.get("config")
|
||||
return config if isinstance(config, dict) else {}
|
||||
return None
|
||||
|
||||
|
||||
def _adaptive_mode(config: dict[str, Any] | None) -> str:
|
||||
if not isinstance(config, dict):
|
||||
return "observe_only"
|
||||
tool_parallelism = config.get("tool_parallelism")
|
||||
if isinstance(tool_parallelism, dict):
|
||||
mode = tool_parallelism.get("mode")
|
||||
if isinstance(mode, str) and mode.strip():
|
||||
return mode.strip()
|
||||
mode = config.get("mode")
|
||||
if isinstance(mode, str) and mode.strip():
|
||||
return mode.strip()
|
||||
return "observe_only"
|
||||
|
||||
|
||||
def _observability_exporter_enabled(
|
||||
plugins_config: dict[str, Any] | None,
|
||||
exporter_name: str,
|
||||
) -> bool:
|
||||
observability_config = _enabled_component_config(plugins_config, "observability")
|
||||
if not isinstance(observability_config, dict):
|
||||
return False
|
||||
exporter_config = observability_config.get(exporter_name)
|
||||
if not isinstance(exporter_config, dict):
|
||||
return False
|
||||
return exporter_config.get("enabled", True) is not False
|
||||
|
||||
|
||||
def _env(name: str) -> str:
|
||||
return os.environ.get(name, "").strip()
|
||||
|
||||
|
||||
def _atif_subagent_export_mode() -> str:
|
||||
mode = _env("HERMES_NEMO_RELAY_ATIF_SUBAGENT_EXPORT_MODE").lower()
|
||||
return "all" if mode == "all" else "embedded"
|
||||
|
||||
|
||||
def _env_bool(name: str) -> bool:
|
||||
return _env(name).lower() in {"1", "true", "yes", "on"}
|
||||
|
||||
|
||||
def _session_id(kwargs: dict[str, Any]) -> str:
|
||||
return str(kwargs.get("session_id") or kwargs.get("parent_session_id") or "default")
|
||||
|
||||
|
||||
def _child_session_id(kwargs: dict[str, Any]) -> str:
|
||||
return str(kwargs.get("child_session_id") or "")
|
||||
|
||||
|
||||
def _subagent_child_metadata(kwargs: dict[str, Any], parent_metadata: dict[str, Any]) -> dict[str, Any]:
|
||||
child_session_id = _child_session_id(kwargs)
|
||||
metadata = {
|
||||
"session_id": child_session_id,
|
||||
"trajectory_id": child_session_id,
|
||||
"nemo_relay_scope_role": "subagent",
|
||||
}
|
||||
for target, source in (
|
||||
("subagent_id", "child_subagent_id"),
|
||||
("child_session_id", "child_session_id"),
|
||||
("child_subagent_id", "child_subagent_id"),
|
||||
("child_role", "child_role"),
|
||||
("parent_session_id", "parent_session_id"),
|
||||
("parent_turn_id", "parent_turn_id"),
|
||||
("parent_subagent_id", "parent_subagent_id"),
|
||||
("parent_trajectory_id", "parent_trajectory_id"),
|
||||
("telemetry_schema_version", "telemetry_schema_version"),
|
||||
):
|
||||
value = parent_metadata.get(source)
|
||||
if value is not None:
|
||||
metadata[target] = value
|
||||
return metadata
|
||||
|
||||
|
||||
def _api_key(kwargs: dict[str, Any]) -> str:
|
||||
return str(kwargs.get("api_request_id") or f"{_session_id(kwargs)}:{kwargs.get('api_call_count') or 'api'}")
|
||||
|
||||
|
||||
def _tool_key(kwargs: dict[str, Any]) -> str:
|
||||
return str(
|
||||
kwargs.get("tool_call_id")
|
||||
or f"{_session_id(kwargs)}:{kwargs.get('turn_id') or ''}:{kwargs.get('tool_name') or 'tool'}"
|
||||
)
|
||||
|
||||
|
||||
def _metadata(kwargs: dict[str, Any]) -> dict[str, Any]:
|
||||
keys = (
|
||||
"telemetry_schema_version",
|
||||
"session_id",
|
||||
"platform",
|
||||
"task_id",
|
||||
"turn_id",
|
||||
"api_request_id",
|
||||
"tool_call_id",
|
||||
"parent_session_id",
|
||||
"parent_turn_id",
|
||||
"parent_subagent_id",
|
||||
"child_session_id",
|
||||
"child_subagent_id",
|
||||
"child_role",
|
||||
"child_status",
|
||||
"provider",
|
||||
"model",
|
||||
"api_mode",
|
||||
"status",
|
||||
"reason",
|
||||
)
|
||||
metadata = {
|
||||
key: _jsonable(kwargs[key])
|
||||
for key in keys
|
||||
if key in kwargs and kwargs[key] is not None
|
||||
}
|
||||
if "session_id" in metadata:
|
||||
metadata.setdefault("trajectory_id", metadata["session_id"])
|
||||
if "parent_session_id" in metadata:
|
||||
metadata.setdefault("parent_trajectory_id", metadata["parent_session_id"])
|
||||
if "child_session_id" in metadata:
|
||||
metadata.setdefault("child_trajectory_id", metadata["child_session_id"])
|
||||
return metadata
|
||||
|
||||
|
||||
def _jsonable(value: Any) -> Any:
|
||||
if value is None or isinstance(value, (str, int, float, bool)):
|
||||
return value
|
||||
if isinstance(value, dict):
|
||||
return {str(k): _jsonable(v) for k, v in value.items()}
|
||||
if isinstance(value, (list, tuple, set)):
|
||||
return [_jsonable(v) for v in value]
|
||||
try:
|
||||
if hasattr(value, "model_dump"):
|
||||
return _jsonable(value.model_dump(mode="json"))
|
||||
except Exception:
|
||||
pass
|
||||
try:
|
||||
if hasattr(value, "__dict__"):
|
||||
return _jsonable(vars(value))
|
||||
except Exception:
|
||||
pass
|
||||
try:
|
||||
return json.loads(json.dumps(value, default=str))
|
||||
except Exception:
|
||||
return str(value)
|
||||
|
||||
|
||||
def _value(obj: Any, key: str, default: Any = None) -> Any:
|
||||
if isinstance(obj, dict):
|
||||
return obj.get(key, default)
|
||||
return getattr(obj, key, default)
|
||||
|
||||
|
||||
def _original_downstream_error(exc: Exception) -> BaseException:
|
||||
# Hermes wraps downstream execution failures in a local/private exception
|
||||
# class, so detect the wrapper by shape instead of importing it here.
|
||||
original = getattr(exc, "original", None)
|
||||
if exc.__class__.__name__ == "_DownstreamExecutionError" and isinstance(original, BaseException):
|
||||
return original
|
||||
return exc
|
||||
|
||||
|
||||
def _is_relay_wrapped_callback_error(exc: Exception, callback_error: Exception | None) -> bool:
|
||||
# NeMo Relay re-wraps a failing callback as ``RuntimeError("internal error:
|
||||
# <ClassName>: <message>")``. Match by prefix rather than exact equality so a
|
||||
# trailing traceback/suffix in a future Relay version doesn't silently defeat
|
||||
# the unwrap; the class-name + message prefix still discriminates the real
|
||||
# downstream failure from unrelated Relay-internal errors. If Relay drops the
|
||||
# leading ``internal error:`` shape entirely, this returns False and Hermes
|
||||
# falls back to surfacing Relay's error (the pre-fix behavior) rather than
|
||||
# masking it.
|
||||
if callback_error is None or not isinstance(exc, RuntimeError):
|
||||
return False
|
||||
expected = f"internal error: {callback_error.__class__.__name__}: {callback_error}"
|
||||
return str(exc).startswith(expected)
|
||||
|
||||
|
||||
def _llm_response_payload(response: Any) -> Any:
|
||||
"""Return the LLM response shape NeMo Relay's ATIF conversion expects."""
|
||||
payload = _jsonable(response)
|
||||
if isinstance(payload, dict) and "assistant_message" in payload:
|
||||
return payload
|
||||
|
||||
choices = _value(response, "choices")
|
||||
if choices is None and isinstance(payload, dict):
|
||||
choices = payload.get("choices")
|
||||
first_choice = choices[0] if isinstance(choices, list) and choices else None
|
||||
message = _value(first_choice, "message")
|
||||
finish_reason = _value(first_choice, "finish_reason")
|
||||
|
||||
assistant_message: dict[str, Any] = {"role": "assistant", "content": ""}
|
||||
if message is not None:
|
||||
assistant_message["role"] = _value(message, "role", "assistant") or "assistant"
|
||||
content = _value(message, "content")
|
||||
if content is not None:
|
||||
assistant_message["content"] = _jsonable(content)
|
||||
tool_calls = _tool_calls_payload(_value(message, "tool_calls"))
|
||||
if tool_calls:
|
||||
assistant_message["tool_calls"] = tool_calls
|
||||
reasoning = _value(message, "reasoning_content")
|
||||
if reasoning is not None:
|
||||
assistant_message["reasoning_content"] = _jsonable(reasoning)
|
||||
elif isinstance(payload, dict):
|
||||
assistant_message["content"] = payload.get("content") or payload.get("output_text") or ""
|
||||
|
||||
return {
|
||||
"model": _value(response, "model", payload.get("model") if isinstance(payload, dict) else None),
|
||||
"assistant_message": assistant_message,
|
||||
"finish_reason": finish_reason,
|
||||
"usage": _jsonable(_value(response, "usage", payload.get("usage") if isinstance(payload, dict) else None)),
|
||||
}
|
||||
|
||||
|
||||
def _tool_calls_payload(tool_calls: Any) -> list[dict[str, Any]]:
|
||||
if not isinstance(tool_calls, list):
|
||||
return []
|
||||
normalized: list[dict[str, Any]] = []
|
||||
for call in tool_calls:
|
||||
function = _value(call, "function")
|
||||
normalized.append(
|
||||
{
|
||||
"id": _value(call, "id"),
|
||||
"type": _value(call, "type", "function") or "function",
|
||||
"function": {
|
||||
"name": _value(function, "name"),
|
||||
"arguments": _value(function, "arguments"),
|
||||
},
|
||||
}
|
||||
)
|
||||
return normalized
|
||||
|
||||
|
||||
def _safe(fn) -> None:
|
||||
try:
|
||||
fn()
|
||||
except Exception as exc:
|
||||
logger.debug("NeMo Relay hook handling failed: %s", exc, exc_info=True)
|
||||
|
||||
|
||||
def _resolve_awaitable(value: Any) -> Any:
|
||||
if not inspect.isawaitable(value):
|
||||
return value
|
||||
try:
|
||||
asyncio.get_running_loop()
|
||||
except RuntimeError:
|
||||
return asyncio.run(value)
|
||||
|
||||
result: dict[str, Any] = {}
|
||||
error: dict[str, BaseException] = {}
|
||||
|
||||
def _runner() -> None:
|
||||
try:
|
||||
result["value"] = asyncio.run(value)
|
||||
except BaseException as exc: # pragma: no cover - re-raised below
|
||||
error["exc"] = exc
|
||||
|
||||
thread = threading.Thread(
|
||||
target=_runner,
|
||||
name="hermes-nemo-relay-awaitable",
|
||||
daemon=True,
|
||||
)
|
||||
thread.start()
|
||||
thread.join()
|
||||
if "exc" in error:
|
||||
raise error["exc"]
|
||||
return result.get("value")
|
||||
|
||||
|
||||
def reset_for_tests() -> None:
|
||||
global _RUNTIME
|
||||
with _LOCK:
|
||||
_RUNTIME = None
|
||||
@@ -0,0 +1,20 @@
|
||||
name: nemo_relay
|
||||
version: "0.1.0"
|
||||
description: "Optional NeMo Relay observability for Hermes. Opt in with `hermes plugins enable observability/nemo_relay`; HERMES_NEMO_RELAY_* env vars configure exports after the plugin is enabled."
|
||||
author: NousResearch
|
||||
hooks:
|
||||
- on_session_start
|
||||
- on_session_end
|
||||
- on_session_finalize
|
||||
- on_session_reset
|
||||
- pre_llm_call
|
||||
- post_llm_call
|
||||
- pre_api_request
|
||||
- post_api_request
|
||||
- api_request_error
|
||||
- pre_tool_call
|
||||
- post_tool_call
|
||||
- pre_approval_request
|
||||
- post_approval_response
|
||||
- subagent_start
|
||||
- subagent_stop
|
||||
Reference in New Issue
Block a user