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NeMo-Relay

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Multi-language agent runtime and library for execution scope management, lifecycle events, and middleware on tool and LLM calls.

★ 17876 forksRustApache-2.0NVIDIA

NVIDIA NeMo Relay is a multi-language agent runtime (Rust core, Python/Node bindings) that adds scopes, middleware, lifecycle events, and plugin-based observability to existing agent stacks. It exports ATOF events, ATIF trajectories, and OpenTelemetry traces without changing your framework or app code.

Use Cases

Observe Codex or Claude Code agent runs locally via CLIInstrument app-owned LLM and tool calls in Python, Node.js, or RustExport ATOF raw events and ATIF trajectory files for debuggingEmit OpenTelemetry traces, logs, and metrics for agent sessionsApply middleware to block, sanitize, route, or retry tool and LLM callsTrack scope ownership and parent-child lineage across subagentsPackage reusable observability, guardrail, and exporter pluginsFeed agent trajectories into evaluation and optimization pipelines

Built With

Language
Rust
Frameworks
LangChain · LangGraph · Deep Agents · OpenClaw · OpenTelemetry · OpenInference · NeMo Agent Toolkit · NeMo Guardrails · Codex · Claude Code

Tags

agent-runtime · observability · middleware · opentelemetry · plugins · scopes · lifecycle-events · trajectories · llm-ops · tracing · codex · claude-code · langgraph · security · evaluation · rust