NVIDIA/NeMo-Relay 0.3.0

NeMo Relay 0.3.0

Repository: NVIDIA/NeMo-Relay

Tag: 0.3.0

Published: 2026-05-29T22:34:58Z

Prerelease: no

Release notes: We are proud to release NeMo Relay 0.3.0!

Key Features

• ✨ NeMo Flow is now NeMo Relay, with refreshed package guidance, docs, and runtime-facing naming.
• 🛡️ Built-in NeMo Guardrails plugin support, including plugin configuration, remote backend support, and CLI editor workflows.
• 🌐 ATIF v1.7 export support with nested subagents, improved tool-observation correlation, and S3-compatible trace storage.
• ⚡️ Non-blocking subscriber delivery with flush APIs for deterministic tests and exporter output.
• 🧠 Adaptive plugin support for CLI and OpenClaw workflows, including editor support for adaptive configuration.
• 📜 Streaming LLM chunk marks for more precise streaming trace inspection.
• 🐍 Python plugin context manager support for cleaner plugin initialization and teardown.
• 📚 New Fern documentation site with release notes, guardrails docs, runtime primer, trace incident runbook, plugin-building, migration, and adaptive tuning guidance.
• 💻 CLI binaries installable through cargo binstall nemo-relay-cli

What's Changed

💥 Breaking Changes

• refactor: narrow core runtime registry surface by @willkill07 in https://github.com/NVIDIA/NeMo-Relay/pull/136
• refactor: rename to NeMo Relay by @willkill07 in https://github.com/NVIDIA/NeMo-Relay/pull/141
• perf!: make subscriber delivery non-blocking by @willkill07 in https://github.com/NVIDIA/NeMo-Relay/pull/170

✨ New Features

• feat: add nemo_guardrails plugin contract by @afourniernv in https://github.com/NVIDIA/NeMo-Relay/pull/131
• feat: expose canonical ATOF event JSON across bindings by @bbednarski9 in https://github.com/NVIDIA/NeMo-Relay/pull/132
• feat: enable adaptive plugin for CLI and OpenClaw by @willkill07 in https://github.com/NVIDIA/NeMo-Relay/pull/128
• feat: add adaptive plugin editor support by @willkill07 in https://github.com/NVIDIA/NeMo-Relay/pull/129
• feat: Add streaming LLM chunk marks by @yczhang-nv in https://github.com/NVIDIA/NeMo-Relay/pull/134
• feat: Integrate security guardrails for agent calls by @yczhang-nv in https://github.com/NVIDIA/NeMo-Relay/pull/135
• feat: Emit guardrail scopes for conditional guardrails by @yczhang-nv in https://github.com/NVIDIA/NeMo-Relay/pull/133
• feat: Add a Python context manager for plugins by @dagardner-nv in https://github.com/NVIDIA/NeMo-Relay/pull/154
• feat: implement nemo_guardrails remote backend by @afourniernv in https://github.com/NVIDIA/NeMo-Relay/pull/144
• feat: upgrade exporters for ATIF v1.7 with nested subagents by @bbednarski9 in https://github.com/NVIDIA/NeMo-Relay/pull/160
• feat: add guardrails plugin editor support by @willkill07 in https://github.com/NVIDIA/NeMo-Relay/pull/166
• feat: Add first-class storage export support for ATIF traces to S3 by @billxbf in https://github.com/NVIDIA/NeMo-Relay/pull/163

⚡ Improvements

• refactor: reduce sonar cognitive complexity by @willkill07 in https://github.com/NVIDIA/NeMo-Relay/pull/167

🐛 Bug Fixes

• fix: emit LLM start before execution intercepts by @willkill07 in https://github.com/NVIDIA/NeMo-Relay/pull/125
• fix: align coding agent trace scopes by @willkill07 in https://github.com/NVIDIA/NeMo-Relay/pull/130
• fix(banner): update launch banner to "NEMO RELAY" by @bbednarski9 in https://github.com/NVIDIA/NeMo-Relay/pull/150
• fix: Improved LangChain serialization by @dagardner-nv in https://github.com/NVIDIA/NeMo-Relay/pull/165
• fix: correlate ATIF tool observations by @willkill07 in https://github.com/NVIDIA/NeMo-Relay/pull/171
• fix: preserve OpenClaw tool call replay visibility by @willkill07 in https://github.com/NVIDIA/NeMo-Relay/pull/178
• fix: repair Hermes shutdown-only ATIF artifacts by @bbednarski9 in https://github.com/NVIDIA/NeMo-Relay/pull/182
• fix: Dedupe overlapping LLM spans in ATIF export by @bbednarski9 in https://github.com/NVIDIA/NeMo-Relay/pull/183
• fix: register adaptive plugin in doctor by @willkill07 in https://github.com/NVIDIA/NeMo-Relay/pull/186
• fix: repair Hermes gateway session fallback by @bbednarski9 in https://github.com/NVIDIA/NeMo-Relay/pull/189

✅ Tests

• test: add ATIF trace correlation coverage by @willkill07 in https://github.com/NVIDIA/NeMo-Relay/pull/126
• test: improve core coverage for guardrails by @willkill07 in https://github.com/NVIDIA/NeMo-Relay/pull/161

🧰 Maintenance

• chore: prepare 0.2 code freeze by @dagardner-nv in https://github.com/NVIDIA/NeMo-Relay/pull/103
• chore: bump OpenClaw node dependency to 0.3.0 by @willkill07 in https://github.com/NVIDIA/NeMo-Relay/pull/113
• chore: Add path filters for integrations by @dagardner-nv in https://github.com/NVIDIA/NeMo-Relay/pull/122
• ci: add cli draft release assets by @willkill07 in https://github.com/NVIDIA/NeMo-Relay/pull/124
• chore: address Sonar scan findings by @willkill07 in https://github.com/NVIDIA/NeMo-Relay/pull/137
• chore: Set minimum Node.js version to 24 by @dagardner-nv in https://github.com/NVIDIA/NeMo-Relay/pull/146
• ci: consolidate Fern docs publishing by @willkill07 in https://github.com/NVIDIA/NeMo-Relay/pull/155
• ci: check Fern broken links by @willkill07 in https://github.com/NVIDIA/NeMo-Relay/pull/157
• ci: align Fern CLI dependency pin by @willkill07 in https://github.com/NVIDIA/NeMo-Relay/pull/158
• chore: bump dependency versions by @willkill07 in https://github.com/NVIDIA/NeMo-Relay/pull/159
• ci: enable ATIF S3 storage tests by @willkill07 in https://github.com/NVIDIA/NeMo-Relay/pull/168

📝 Documentation Updates

• docs: bump docs to align with 0.3 by @willkill07 in https://github.com/NVIDIA/NeMo-Relay/pull/121
• docs: clarify managed LLM start event ordering by @willkill07 in https://github.com/NVIDIA/NeMo-Relay/pull/127
• docs: add adaptive tuning skills by @mnajafian-nv in https://github.com/NVIDIA/NeMo-Relay/pull/138
• docs: add build plugin skill by @mnajafian-nv in https://github.com/NVIDIA/NeMo-Relay/pull/139
• docs: add migration guide by @mnajafian-nv in https://github.com/NVIDIA/NeMo-Relay/pull/140
• docs: fix docs build and add migration skill by @willkill07 in https://github.com/NVIDIA/NeMo-Relay/pull/148
• docs: add agent runtime primer by @mnajafian-nv in https://github.com/NVIDIA/NeMo-Relay/pull/145
• docs: add trace incident runbook by @mnajafian-nv in https://github.com/NVIDIA/NeMo-Relay/pull/149
• docs: switch over to fern by @willkill07 in https://github.com/NVIDIA/NeMo-Relay/pull/123

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