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feat(nodes): add NVIDIA Nemotron LLM node #1765

Description

@Leela8256

Summary

RocketRide has dedicated LLM nodes for OpenAI, Anthropic, Gemini, DeepSeek, Qwen, MiniMax, Kimi, and Baidu Qianfan — but nothing for NVIDIA's Nemotron family (open-weight hybrid Mamba-Transformer reasoning models, up to 1M context). Nemotron is served through NVIDIA's OpenAI-compatible cloud API (build.nvidia.com, nvapi- keys) and is self-hostable via NIM containers / vLLM / SGLang using the same model IDs.

Proposal

Add a dedicated llm_nemotron node following the llm_kimi / llm_minimax pattern:

  • Node package with Nemotron 3 profiles (Super 120B default, Ultra 550B, Nano 30B), a Custom profile, and self-hosted "(Local)" NIM profiles
  • sync_models provider (ROCKETRIDE_NVIDIA_KEY) with a tight nvidia/*nemotron* model filter — the NVIDIA /v1/models catalog is multi-vendor (Llama, GLM, Kimi, ...), and embed/vision/safety/reward variants must be excluded
  • CI sync-workflow key wiring, test-framework mock credential, live profile-existence test, catalog docs

Reasoning models: responses may carry reasoning_content / <think> blocks; the node should strip these so downstream nodes only see the final answer .

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