feat(relay-plugin): support nemo relay 0.8 through 0.x

[bbednarski9]

Summary

• declare NeMo Relay compatibility as >=0.8.0, <1.0.0 across build metadata, bundle manifest, and user-facing documentation
• refresh Cargo.lock to resolve nemo-relay-plugin and nemo-relay-types 0.8.4
• assert the packaged manifest retains the compatibility range

Validation

• cargo test --locked -p switchyard-nemo-relay-plugin --no-fail-fast
• pytest tests/relay_plugin/test_package_bundle.py -v
• make publish
• clean compile against nemo-relay-plugin 0.8.0

Prerelease note

Standard semver prerelease matching means this range admits stable 0.9.x releases but does not itself admit 0.9.0-rc.1. Explicit prerelease support needs a separate RC-inclusive constraint.

[github-actions]

PR Preview Action v1.8.1
🚀 View preview at https://NVIDIA-NeMo.github.io/Switchyard/pr-preview/pr-688/
Built to branch gh-pages at 2026-09-14 16:56 UTC. Preview will be ready when the GitHub Pages deployment is complete.

[coderabbitai]

Walkthrough

The PR changes the minimum supported NeMo Relay version from 0.8.1 to 0.8.0 in workspace dependencies, plugin metadata, and installation documentation. The upper bound remains below 0.9.0.

Changes

Relay compatibility

Layer / File(s)	Summary
Update Relay compatibility range Cargo.toml, crates/switchyard-nemo-relay-plugin/relay-plugin.toml, crates/switchyard-nemo-relay-plugin/README.md	The minimum supported NeMo Relay version changes from 0.8.1 to 0.8.0. The upper bound remains below 0.9.0 in all declarations.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~5 minutes

Merge Risk: 🟡 Moderate · up to 6d685

The published compatibility contract is inconsistent, so users may receive conflicting installation guidance or use a Relay version whose support is unverified.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
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.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately identifies support for NeMo Relay 0.8, which is the main change. The phrase "through 0.x" is broader than the implemented range but does not make the title unrelated.

---

_{A rabbit checks the relay gate
0.8.0 arrives, not late
The upper bound stays nine
Three declarations align
The plugin hops in time
And every version line can rhyme}

_{Comment @coderabbitai help to get the list of available commands.}

[coderabbitai]

Actionable comments posted: 1

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Inline comments:
In `@Cargo.toml`:
- Around line 35-41: Update the nemo-relay-plugin dependency constraint in
Cargo.toml and the corresponding relay-plugin.toml compatibility declaration to
require >=0.8.1 and <0.9.0, keeping them consistent with the documented
contract.

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---

ℹ️ Review info

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📥 Commits

Reviewing files that changed from the base of the PR and between 9b6efb9 and 6d68506.

📒 Files selected for processing (3)

• Cargo.toml
• crates/switchyard-nemo-relay-plugin/README.md
• crates/switchyard-nemo-relay-plugin/relay-plugin.toml

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[ibankolehame]

@bbednarski9 , I really appreciate the quick turnaround. I went through the diff, and the compatibility range now looks consistent across the dependency, manifest, and documentation. The packaging test is a nice addition as well.

One quick question, since the new range includes stable Relay 0.9, are you planning to include a compile or plug in load check against 0.9 in the release validation? I saw the current validation covers 0.8.0 and the lock file uses 0.8.4. If 0.9 is not available yet, that could be a follow up release check.

The note about release candidates makes sense. Everything else looks good to me, and this resolves the earlier inconsistency , thank you!

[bbednarski9]

Hey @ibankolehame thanks for the call-out. Now is a good time to update the docs with instructions on the new NeMo-Relay-Plugins repo for distributing trusted external dynamic plugins (like switchyard). See docs update in 4cc3100

[ibankolehame]

Thanks so much, @bbednarski9 . I reviewed the update in 4cc3100, and the new bundle instructions are really helpful. This gives us a much clearer deployment path for AA. This addresses my concern. I really appreciate you taking the time to update both the compatibility range and the documentation. It looks perfect from my side!