fix(test): enable Relay for Hermes streaming coverage

[yczhang-nv]

Overview

Enable NeMo Relay for the Hermes persistent-runtime streaming test and keep Hermes Agent installed when the CI-equivalent Python test recipe synchronizes its environment. This ensures the streaming assertions execute instead of failing the Relay precondition or skipping because the optional harness dependency was removed.

This changes test and CI-recipe behavior only. There are no public API, runtime behavior, dependency-version, or breaking changes.

Details

• Build the Hermes streaming test configuration with with_relay(...) and require the nemo_relay fixture.
• Include the hermes-agent extra in just test-python so the recipe preserves the harness dependency installed by Python CI.
• Leave the intentional negative unit test for streaming=True without Relay unchanged.

Validation

• uv run --no-sync pytest tests/e2e/test_hermes_e2e.py::test_hermes_persistent_host_reuses_native_session -vv -rs — 1 passed
• uv run --no-sync pytest tests/python/test_streaming.py tests/e2e/test_hermes_e2e.py -q -rs — 40 passed
• just test-python — 501 passed, 15 unrelated opt-in integration tests skipped; all five Hermes E2E tests executed
• just --fmt --check
• git diff --check

Where should the reviewer start?

Start with tests/e2e/test_hermes_e2e.py::test_hermes_persistent_host_reuses_native_session, then review the optional extras in the justfile test-python recipe.

Related Issues: (use one of the action keywords Closes / Fixes / Resolves / Relates to)

• Relates to feat: add Relay-backed runtime streaming #109 and refactor: slim adapter runtime dependencies #105

• I confirm this contribution is my own work, or I have the right to submit it under this project's license.

• I searched existing issues and open pull requests, and this does not duplicate existing work.

Summary by CodeRabbit

• Tests
  • Improved end-to-end coverage for persistent host sessions using relay-enabled runtime configurations.
  • Updated Python test setup to include the optional dependencies required for Hermes agent testing.
  • Enhanced validation of native session reuse behavior.

[coderabbitai]

Walkthrough

The Python test target now installs the Hermes agent extra. The persistent-host Hermes E2E test enables the relay fixture and initializes Hermes with relay configuration.

Changes

Hermes relay testing

Layer / File(s)	Summary
Hermes test dependencies justfile	The test-python target synchronizes the hermes-agent optional dependency group.
Relay-enabled Hermes test tests/e2e/test_hermes_e2e.py	The persistent-host test enables nemo_relay and initializes Hermes configuration with relay support.

Estimated code review effort: 2 (Simple) | ~8 minutes

Possibly related PRs

• NVIDIA/NeMo-Fabric#124: Introduces the relay-enabled Hermes execution path exercised by the updated E2E test.
• NVIDIA/NeMo-Fabric#127: Updates CI dependency extras to include hermes-agent.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title follows Conventional Commits and accurately summarizes the Relay-related test/CI update.
Description check	✅ Passed	The description covers overview, reviewer start, related issues, validation, and required confirmations.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[github-actions]

Fern docs preview: https://nvidia-preview-pull-request-136.docs.buildwithfern.com/nemo/fabric

[AjayThorve]

verified it fixes the problematic hermes e2e test

[yczhang-nv]

/merge