> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.nvidia.com/nemo/relay/llms.txt.
> For full documentation content, see https://docs.nvidia.com/nemo/relay/llms-full.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.nvidia.com/nemo/relay/_mcp/server.

# Release Notes

This page summarizes the current documentation-visible release state. GitHub
Releases remain the source of truth for complete release history and
tag-specific notes.

## Current Release

NeMo Relay 0.3 focuses on the renamed NeMo Relay runtime, plugin-driven agent
observability, guardrails integration, adaptive behavior for coding agents, and
ATIF v1.7 trace export.

The most important compatibility notes are:

* The project and package-facing documentation now use the NeMo Relay name.
* The core runtime registry surface has been narrowed. Code that registered
  runtime behavior through older broad registry entry points should move to the
  documented middleware, subscriber, and plugin APIs.
* Node.js 24 or newer is now the minimum supported Node.js version.
* Native subscriber delivery is now non-blocking. Code that depends on
  subscriber callback side effects, exporter output, or deterministic test
  assertions must call the subscriber flush API.

Use the child pages for release highlights and support notes. For the complete
PR-by-PR changelog, release artifacts, and tag-specific history, use
[GitHub Releases](https://github.com/NVIDIA/NeMo-Relay/releases).

## Release Scope

This release includes:

* Built-in NeMo Guardrails plugin support, including a remote backend and CLI
  editor support.
* Canonical ATOF event JSON exposure across Rust, Python, and Node.js bindings.
* ATIF v1.7 exporter updates for nested subagents, tool-observation
  correlation, and first-class S3-compatible storage export.
* Adaptive plugin support for the CLI and OpenClaw integration, including
  editor support for adaptive configuration.
* Streaming LLM chunk marks and improved guardrail scope emission.
* Python plugin context-manager ergonomics.
* Non-blocking native subscriber delivery with flush APIs across Rust, Python,
  Node.js, FFI/Go, and WebAssembly parity.
* LangChain serialization fixes and OpenClaw trace replay visibility fixes.
* Fern documentation publishing, link validation, and updated guidance for
  agent runtime concepts, trace incident response, plugin building, and adaptive
  tuning.

## Feature Documentation

For the major 0.3 additions, start with:

* [Observability Plugin](/observability-plugin/about)
* [Agent Trajectory Interchange Format (ATIF)](/observability-plugin/atif)
* [NeMo Guardrails Plugin](/nemo-guardrails-plugin/about)
* [Adaptive Plugin](/adaptive-plugin/about)
* [OpenClaw Plugin Guide](/supported-integrations/openclaw-plugin)
* [LangChain Integration Guide](/supported-integrations/langchain)