Adds backend-neutral observer hooks for plugins: session, turn, API request, tool, approval, and subagent lifecycle events with stable correlation IDs (session_id, task_id, turn_id, api_request_id, tool_call_id, parent/child subagent ids). Extends VALID_HOOKS with api_request_error and subagent_start. Hot path is zero-cost when no plugin subscribes: has_hook()/presence checks gate all payload construction, request payloads are returned by reference when no middleware rewrites, and the sanitized response payload no longer embeds raw response objects. Bundles the optional NeMo-Relay observability plugin (plugins/observability/nemo_relay) as an in-repo consumer of the new hooks, peer to the existing langfuse plugin. Fails open when the optional nemo-relay package is not installed. Authored-by: Bryan Bednarski <bbednarski@nvidia.com> Salvaged from #29722 onto current main.
Website
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Installation
yarn
Local Development
yarn start
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Build
yarn build
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Deployment
Using SSH:
USE_SSH=true yarn deploy
Not using SSH:
GIT_USER=<Your GitHub username> yarn deploy
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