Govern continuation before consequence.

HCS v1.0 constitutional architecture

Harmonic is a constitutional operating layer for intelligent systems: it evaluates whether an AI output, agent step, tool call, or workflow continuation remains supportable before it becomes action.

It does not replace identity, policy, safety, legal, clinical, audit, or execution systems. It composes with them through explicit constitutional interfaces so responsibility stays bounded and consequence stays governed.

If AI can take action, Harmonic belongs in front of it. Built for AI agents, tool-using LLMs, autonomous workflows, enterprise automation, copilots, robotics, and multi-agent systems that may create real-world consequences.

Explore HCS Try Playground Interactive Demo

Works with OpenAI · Claude · Gemini · LangChain · CrewAI · Custom agents · Any LLM stack

Interactive Governance Studio

See the same AI output under different execution models.

Run a live comparison of Raw LLM, Harmonic Runtime, and Harmonic + Governance Pack. The studio shows how a reasonable recommendation becomes a governed execution decision with artifact-level evidence.

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Raw LLMRuntime GovernanceGoverned Execution

AI RecommendationAnswer

Harmonic RuntimeBlock

Governed ExecutionEscalate

Reality Contact: PASS Authority Continuity: PASS Consequence Boundary: FAIL Runtime Admissibility: FAIL

Specification Library

Harmonic Constitutional Specification

HCS v1.0 defines the implementation-independent constitutional architecture behind continuation admissibility: jurisdiction, evaluation, interfaces, runtime lifecycle, evidence, and federation.

View HCS Library Download Specifications

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

JurisdictionHCS-001

EvaluationHCS-002

Runtime LifecycleHCS-004

Consequence should emerge only through constitutionally supportable continuation.

01 / Always on

Stabilize every meaningful output

Run Harmonic on model responses, agent plans, tool calls, and workflow steps before they continue.

02 / Simple decision

Allow, constrain, escalate, block

Keep integration clean with a bounded operational response your application can enforce immediately.

03 / Upgrade path

Grow into deeper governance

For higher-risk systems, expand into Admissibility Core, Execution Gateway, and Veil Runtime.

What builders get

A developer-friendly middleware layer that sits after the model and before the user-visible or execution-bound result.

Fast API integration
Public playground
Usage-based pricing
Basic logs and artifact references
No model replacement required

What it prevents

Harmonic is designed to reduce ordinary operational drift accumulation before it becomes customer-facing or action-bound.

Overconfident risky continuation
Contradiction normalization
Unsafe agent action
Missing escalation
Consequence-insensitive response behavior