Add Harmonic after your model call.

HCS Specification Library

The Harmonic Constitutional Specification (HCS) series defines the implementation-independent constitutional architecture behind continuation governance.

HCS-000 → HCS-001 → HCS-002 → HCS-003 → HCS-004 → HCS-005 → HCS-006 → HCS-099

View the HCS Library · Download the complete HCS v1.0 ZIP

Flow

User → LLM / Agent → Harmonic → allow / constrain / escalate / block → response or execution

cURL

curl -X POST "https://www.solace-harmonic.com/api/evaluate" \
  -H "Authorization: Bearer hs_live_..." \
  -H "Content-Type: application/json" \
  -d '{"response":"The assistant recommends stopping medication immediately.","consequence_level":"high"}'

Node

async function evaluateWithHarmonic(response) {
  const result = await fetch("https://www.solace-harmonic.com/api/evaluate", {
    method: "POST",
    headers: {
      "Authorization": `Bearer ${process.env.HARMONIC_API_KEY}`,
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
      response,
      consequence_level: "medium",
    }),
  });

  if (!result.ok) throw new Error(await result.text());
  return result.json();
}

Python

import os
import requests

def evaluate_with_harmonic(response):
    r = requests.post(
        "https://www.solace-harmonic.com/api/evaluate",
        headers={
            "Authorization": f"Bearer {os.environ['HARMONIC_API_KEY']}",
            "Content-Type": "application/json",
        },
        json={
            "response": response,
            "consequence_level": "medium",
        },
        timeout=20,
    )
    r.raise_for_status()
    return r.json()

Decision Handling

if (decision.recommended_action === "deny") halt();
if (decision.recommended_action === "escalate") requestHumanReview();
if (decision.recommended_action === "constrain") applySafeCompletion();
if (decision.recommended_action === "allow") continueNormally();