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One agent, not a toggle

HermesCo runs a single operator. There is no model picker and no “Hermes or Nemotron” switch. Hermes is the brain; Nemotron is a safety screen that is always on underneath it. 
Hermes (Nous Research)  ->  NVIDIA Nemotron (NemoClaw)  ->  Stripe
   decides and drives          screens every spend           settles money

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Hermes decides

Hermes 4 405B is the operator. It receives a system prompt, the available tool specs, and the conversation history, then reasons and emits tool calls in Hermes’s native format: 
<tool_call>
{"name": "propose_spend", "arguments": {"amount_usd": 120, "vendor": "CoreWeave", "purpose": "GPU server"}}
</tool_call>
The server parses each <tool_call>, executes the tool, and appends the result as a <tool_response> for the next step. The loop is bounded so a turn always terminates. Hermes stops calling tools when the task is done or when a spend is awaiting a human decision. The model is defined in src/lib/hermesco/models.ts: 
export const HERMES_MODEL = {
  id: "nousresearch/hermes-4-405b",
  label: "Hermes 4 405B",
  vendor: "Nous Research",
};

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Nemotron screens

Every proposed spend is classified by NVIDIA Nemotron before it can move money. This is the NemoClaw layer. It is not a different agent you choose; it is a second set of eyes that runs on every spend. 
export const NEMO_MODEL = {
  id: "nvidia/nemotron-3-ultra-550b-a55b",
  label: "Nemotron 3 Ultra",
  vendor: "NVIDIA",
};
export const SAFETY_MODEL_ID = NEMO_MODEL.id;
Nemotron’s judgement is layered with deterministic checks so the safety outcome never depends on a model being available. See Safety screen for the exact order of evaluation.

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Stripe settles

When money actually moves, it moves through Stripe: real Checkout sessions for deposits, real payment links for earning, and a real ledger entry for every spend. There is no simulated fallback and no canned test card. If Stripe is not connected, the money tools say so rather than faking a result. See Treasury.

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Why this unifies the three sponsors

The hackathon brings together Nous Research (Hermes), NVIDIA (Nemotron, NemoClaw, agent skills), and Stripe (payment skills). Rather than hiding them behind a dropdown, HermesCo composes them into a single operating loop: the Nous brain decides, the NVIDIA screen verifies, and the Stripe rail settles, all on real infrastructure.